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upgrade to version 2.2.0, see release notes for details

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@ -1,16 +1,16 @@
GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
Preamble
The GNU General Public License is a free, copyleft license for
The GNU General Public License is a free, copyleft license for
software and other kinds of works.
The licenses for most software and other practical works are designed
The licenses for most software and other practical works are designed
to take away your freedom to share and change the works. By contrast,
the GNU General Public License is intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
@ -19,35 +19,35 @@ GNU General Public License for most of our software; it applies also to
any other work released this way by its authors. You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
them if you wish), that you receive source code or can get it if you
want it, that you can change the software or use pieces of it in new
free programs, and that you know you can do these things.
free programs, and that you know you can do these things.
To protect your rights, we need to prevent others from denying you
To protect your rights, we need to prevent others from denying you
these rights or asking you to surrender the rights. Therefore, you have
certain responsibilities if you distribute copies of the software, or if
you modify it: responsibilities to respect the freedom of others.
For example, if you distribute copies of such a program, whether
For example, if you distribute copies of such a program, whether
gratis or for a fee, you must pass on to the recipients the same
freedoms that you received. You must make sure that they, too, receive
or can get the source code. And you must show them these terms so they
know their rights.
Developers that use the GNU GPL protect your rights with two steps:
Developers that use the GNU GPL protect your rights with two steps:
(1) assert copyright on the software, and (2) offer you this License
giving you legal permission to copy, distribute and/or modify it.
For the developers' and authors' protection, the GPL clearly explains
For the developers' and authors' protection, the GPL clearly explains
that there is no warranty for this free software. For both users' and
authors' sake, the GPL requires that modified versions be marked as
changed, so that their problems will not be attributed erroneously to
authors of previous versions.
Some devices are designed to deny users access to install or run
Some devices are designed to deny users access to install or run
modified versions of the software inside them, although the manufacturer
can do so. This is fundamentally incompatible with the aim of
protecting users' freedom to change the software. The systematic
@ -58,49 +58,49 @@ products. If such problems arise substantially in other domains, we
stand ready to extend this provision to those domains in future versions
of the GPL, as needed to protect the freedom of users.
Finally, every program is threatened constantly by software patents.
Finally, every program is threatened constantly by software patents.
States should not allow patents to restrict development and use of
software on general-purpose computers, but in those that do, we wish to
avoid the special danger that patents applied to a free program could
make it effectively proprietary. To prevent this, the GPL assures that
patents cannot be used to render the program non-free.
The precise terms and conditions for copying, distribution and
The precise terms and conditions for copying, distribution and
modification follow.
TERMS AND CONDITIONS
TERMS AND CONDITIONS
0. Definitions.
0. Definitions.
"This License" refers to version 3 of the GNU General Public License.
"This License" refers to version 3 of the GNU General Public License.
"Copyright" also means copyright-like laws that apply to other kinds of
"Copyright" also means copyright-like laws that apply to other kinds of
works, such as semiconductor masks.
"The Program" refers to any copyrightable work licensed under this
"The Program" refers to any copyrightable work licensed under this
License. Each licensee is addressed as "you". "Licensees" and
"recipients" may be individuals or organizations.
To "modify" a work means to copy from or adapt all or part of the work
To "modify" a work means to copy from or adapt all or part of the work
in a fashion requiring copyright permission, other than the making of an
exact copy. The resulting work is called a "modified version" of the
earlier work or a work "based on" the earlier work.
A "covered work" means either the unmodified Program or a work based
A "covered work" means either the unmodified Program or a work based
on the Program.
To "propagate" a work means to do anything with it that, without
To "propagate" a work means to do anything with it that, without
permission, would make you directly or secondarily liable for
infringement under applicable copyright law, except executing it on a
computer or modifying a private copy. Propagation includes copying,
distribution (with or without modification), making available to the
public, and in some countries other activities as well.
To "convey" a work means any kind of propagation that enables other
To "convey" a work means any kind of propagation that enables other
parties to make or receive copies. Mere interaction with a user through
a computer network, with no transfer of a copy, is not conveying.
An interactive user interface displays "Appropriate Legal Notices"
An interactive user interface displays "Appropriate Legal Notices"
to the extent that it includes a convenient and prominently visible
feature that (1) displays an appropriate copyright notice, and (2)
tells the user that there is no warranty for the work (except to the
@ -109,18 +109,18 @@ work under this License, and how to view a copy of this License. If
the interface presents a list of user commands or options, such as a
menu, a prominent item in the list meets this criterion.
1. Source Code.
1. Source Code.
The "source code" for a work means the preferred form of the work
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A "Standard Interface" means an interface that either is an official
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The "System Libraries" of an executable work include anything, other
The "System Libraries" of an executable work include anything, other
than the work as a whole, that (a) is included in the normal form of
packaging a Major Component, but which is not part of that Major
Component, and (b) serves only to enable use of the work with that
@ -131,7 +131,7 @@ implementation is available to the public in source code form. A
(if any) on which the executable work runs, or a compiler used to
produce the work, or an object code interpreter used to run it.
The "Corresponding Source" for a work in object code form means all
The "Corresponding Source" for a work in object code form means all
the source code needed to generate, install, and (for an executable
work) run the object code and to modify the work, including scripts to
control those activities. However, it does not include the work's
@ -144,16 +144,16 @@ linked subprograms that the work is specifically designed to require,
such as by intimate data communication or control flow between those
subprograms and other parts of the work.
The Corresponding Source need not include anything that users
The Corresponding Source need not include anything that users
can regenerate automatically from other parts of the Corresponding
Source.
The Corresponding Source for a work in source code form is that
The Corresponding Source for a work in source code form is that
same work.
2. Basic Permissions.
2. Basic Permissions.
All rights granted under this License are granted for the term of
All rights granted under this License are granted for the term of
copyright on the Program, and are irrevocable provided the stated
conditions are met. This License explicitly affirms your unlimited
permission to run the unmodified Program. The output from running a
@ -161,7 +161,7 @@ covered work is covered by this License only if the output, given its
content, constitutes a covered work. This License acknowledges your
rights of fair use or other equivalent, as provided by copyright law.
You may make, run and propagate covered works that you do not
You may make, run and propagate covered works that you do not
convey, without conditions so long as your license otherwise remains
in force. You may convey covered works to others for the sole purpose
of having them make modifications exclusively for you, or provide you
@ -172,19 +172,19 @@ for you must do so exclusively on your behalf, under your direction
and control, on terms that prohibit them from making any copies of
your copyrighted material outside their relationship with you.
Conveying under any other circumstances is permitted solely under
Conveying under any other circumstances is permitted solely under
the conditions stated below. Sublicensing is not allowed; section 10
makes it unnecessary.
3. Protecting Users' Legal Rights From Anti-Circumvention Law.
3. Protecting Users' Legal Rights From Anti-Circumvention Law.
No covered work shall be deemed part of an effective technological
No covered work shall be deemed part of an effective technological
measure under any applicable law fulfilling obligations under article
11 of the WIPO copyright treaty adopted on 20 December 1996, or
similar laws prohibiting or restricting circumvention of such
measures.
When you convey a covered work, you waive any legal power to forbid
When you convey a covered work, you waive any legal power to forbid
circumvention of technological measures to the extent such circumvention
is effected by exercising rights under this License with respect to
the covered work, and you disclaim any intention to limit operation or
@ -192,9 +192,9 @@ modification of the work as a means of enforcing, against the work's
users, your or third parties' legal rights to forbid circumvention of
technological measures.
4. Conveying Verbatim Copies.
4. Conveying Verbatim Copies.
You may convey verbatim copies of the Program's source code as you
You may convey verbatim copies of the Program's source code as you
receive it, in any medium, provided that you conspicuously and
appropriately publish on each copy an appropriate copyright notice;
keep intact all notices stating that this License and any
@ -202,37 +202,37 @@ non-permissive terms added in accord with section 7 apply to the code;
keep intact all notices of the absence of any warranty; and give all
recipients a copy of this License along with the Program.
You may charge any price or no price for each copy that you convey,
You may charge any price or no price for each copy that you convey,
and you may offer support or warranty protection for a fee.
5. Conveying Modified Source Versions.
5. Conveying Modified Source Versions.
You may convey a work based on the Program, or the modifications to
You may convey a work based on the Program, or the modifications to
produce it from the Program, in the form of source code under the
terms of section 4, provided that you also meet all of these conditions:
a) The work must carry prominent notices stating that you modified
it, and giving a relevant date.
a) The work must carry prominent notices stating that you modified
it, and giving a relevant date.
b) The work must carry prominent notices stating that it is
released under this License and any conditions added under section
7. This requirement modifies the requirement in section 4 to
"keep intact all notices".
b) The work must carry prominent notices stating that it is
released under this License and any conditions added under section
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"keep intact all notices".
c) You must license the entire work, as a whole, under this
License to anyone who comes into possession of a copy. This
License will therefore apply, along with any applicable section 7
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regardless of how they are packaged. This License gives no
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c) You must license the entire work, as a whole, under this
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d) If the work has interactive user interfaces, each must display
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interfaces that do not display Appropriate Legal Notices, your
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A compilation of a covered work with other separate and independent
A compilation of a covered work with other separate and independent
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in or on a volume of a storage or distribution medium, is called an
@ -242,59 +242,59 @@ beyond what the individual works permit. Inclusion of a covered work
in an aggregate does not cause this License to apply to the other
parts of the aggregate.
6. Conveying Non-Source Forms.
6. Conveying Non-Source Forms.
You may convey a covered work in object code form under the terms
You may convey a covered work in object code form under the terms
of sections 4 and 5, provided that you also convey the
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in one of these ways:
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(including a physical distribution medium), accompanied by the
Corresponding Source fixed on a durable physical medium
customarily used for software interchange.
a) Convey the object code in, or embodied in, a physical product
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Corresponding Source fixed on a durable physical medium
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you inform other peers where the object code and Corresponding
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A separable portion of the object code, whose source code is excluded
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A "User Product" is either (1) a "consumer product", which means any
A "User Product" is either (1) a "consumer product", which means any
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@ -307,7 +307,7 @@ is a consumer product regardless of whether the product has substantial
commercial, industrial or non-consumer uses, unless such uses represent
the only significant mode of use of the product.
"Installation Information" for a User Product means any methods,
"Installation Information" for a User Product means any methods,
procedures, authorization keys, or other information required to install
and execute modified versions of a covered work in that User Product from
a modified version of its Corresponding Source. The information must
@ -315,7 +315,7 @@ suffice to ensure that the continued functioning of the modified object
code is in no case prevented or interfered with solely because
modification has been made.
If you convey an object code work under this section in, or with, or
If you convey an object code work under this section in, or with, or
specifically for use in, a User Product, and the conveying occurs as
part of a transaction in which the right of possession and use of the
User Product is transferred to the recipient in perpetuity or for a
@ -326,7 +326,7 @@ if neither you nor any third party retains the ability to install
modified object code on the User Product (for example, the work has
been installed in ROM).
The requirement to provide Installation Information does not include a
The requirement to provide Installation Information does not include a
requirement to continue to provide support service, warranty, or updates
for a work that has been modified or installed by the recipient, or for
the User Product in which it has been modified or installed. Access to a
@ -334,15 +334,15 @@ network may be denied when the modification itself materially and
adversely affects the operation of the network or violates the rules and
protocols for communication across the network.
Corresponding Source conveyed, and Installation Information provided,
Corresponding Source conveyed, and Installation Information provided,
in accord with this section must be in a format that is publicly
documented (and with an implementation available to the public in
source code form), and must require no special password or key for
unpacking, reading or copying.
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7. Additional Terms.
"Additional permissions" are terms that supplement the terms of this
"Additional permissions" are terms that supplement the terms of this
License by making exceptions from one or more of its conditions.
Additional permissions that are applicable to the entire Program shall
be treated as though they were included in this License, to the extent
@ -351,41 +351,41 @@ apply only to part of the Program, that part may be used separately
under those permissions, but the entire Program remains governed by
this License without regard to the additional permissions.
When you convey a copy of a covered work, you may at your option
When you convey a copy of a covered work, you may at your option
remove any additional permissions from that copy, or from any part of
it. (Additional permissions may be written to require their own
removal in certain cases when you modify the work.) You may place
additional permissions on material, added by you to a covered work,
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Notwithstanding any other provision of this License, for material you
Notwithstanding any other provision of this License, for material you
add to a covered work, you may (if authorized by the copyright holders of
that material) supplement the terms of this License with terms:
a) Disclaiming warranty or limiting liability differently from the
terms of sections 15 and 16 of this License; or
a) Disclaiming warranty or limiting liability differently from the
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All other non-permissive additional terms are considered "further
All other non-permissive additional terms are considered "further
restrictions" within the meaning of section 10. If the Program as you
received it, or any part of it, contains a notice stating that it is
governed by this License along with a term that is a further
@ -395,46 +395,46 @@ License, you may add to a covered work material governed by the terms
of that license document, provided that the further restriction does
not survive such relicensing or conveying.
If you add terms to a covered work in accord with this section, you
If you add terms to a covered work in accord with this section, you
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where to find the applicable terms.
Additional terms, permissive or non-permissive, may be stated in the
Additional terms, permissive or non-permissive, may be stated in the
form of a separately written license, or stated as exceptions;
the above requirements apply either way.
8. Termination.
8. Termination.
You may not propagate or modify a covered work except as expressly
You may not propagate or modify a covered work except as expressly
provided under this License. Any attempt otherwise to propagate or
modify it is void, and will automatically terminate your rights under
this License (including any patent licenses granted under the third
paragraph of section 11).
However, if you cease all violation of this License, then your
However, if you cease all violation of this License, then your
license from a particular copyright holder is reinstated (a)
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finally terminates your license, and (b) permanently, if the copyright
holder fails to notify you of the violation by some reasonable means
prior to 60 days after the cessation.
Moreover, your license from a particular copyright holder is
Moreover, your license from a particular copyright holder is
reinstated permanently if the copyright holder notifies you of the
violation by some reasonable means, this is the first time you have
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your receipt of the notice.
Termination of your rights under this section does not terminate the
Termination of your rights under this section does not terminate the
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material under section 10.
9. Acceptance Not Required for Having Copies.
9. Acceptance Not Required for Having Copies.
You are not required to accept this License in order to receive or
You are not required to accept this License in order to receive or
run a copy of the Program. Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
to receive a copy likewise does not require acceptance. However,
@ -443,14 +443,14 @@ modify any covered work. These actions infringe copyright if you do
not accept this License. Therefore, by modifying or propagating a
covered work, you indicate your acceptance of this License to do so.
10. Automatic Licensing of Downstream Recipients.
10. Automatic Licensing of Downstream Recipients.
Each time you convey a covered work, the recipient automatically
Each time you convey a covered work, the recipient automatically
receives a license from the original licensors, to run, modify and
propagate that work, subject to this License. You are not responsible
for enforcing compliance by third parties with this License.
An "entity transaction" is a transaction transferring control of an
An "entity transaction" is a transaction transferring control of an
organization, or substantially all assets of one, or subdividing an
organization, or merging organizations. If propagation of a covered
work results from an entity transaction, each party to that
@ -460,7 +460,7 @@ give under the previous paragraph, plus a right to possession of the
Corresponding Source of the work from the predecessor in interest, if
the predecessor has it or can get it with reasonable efforts.
You may not impose any further restrictions on the exercise of the
You may not impose any further restrictions on the exercise of the
rights granted or affirmed under this License. For example, you may
not impose a license fee, royalty, or other charge for exercise of
rights granted under this License, and you may not initiate litigation
@ -468,13 +468,13 @@ rights granted under this License, and you may not initiate litigation
any patent claim is infringed by making, using, selling, offering for
sale, or importing the Program or any portion of it.
11. Patents.
11. Patents.
A "contributor" is a copyright holder who authorizes use under this
A "contributor" is a copyright holder who authorizes use under this
License of the Program or a work on which the Program is based. The
work thus licensed is called the contributor's "contributor version".
A contributor's "essential patent claims" are all patent claims
A contributor's "essential patent claims" are all patent claims
owned or controlled by the contributor, whether already acquired or
hereafter acquired, that would be infringed by some manner, permitted
by this License, of making, using, or selling its contributor version,
@ -484,19 +484,19 @@ purposes of this definition, "control" includes the right to grant
patent sublicenses in a manner consistent with the requirements of
this License.
Each contributor grants you a non-exclusive, worldwide, royalty-free
Each contributor grants you a non-exclusive, worldwide, royalty-free
patent license under the contributor's essential patent claims, to
make, use, sell, offer for sale, import and otherwise run, modify and
propagate the contents of its contributor version.
In the following three paragraphs, a "patent license" is any express
In the following three paragraphs, a "patent license" is any express
agreement or commitment, however denominated, not to enforce a patent
(such as an express permission to practice a patent or covenant not to
sue for patent infringement). To "grant" such a patent license to a
party means to make such an agreement or commitment not to enforce a
patent against the party.
If you convey a covered work, knowingly relying on a patent license,
If you convey a covered work, knowingly relying on a patent license,
and the Corresponding Source of the work is not available for anyone
to copy, free of charge and under the terms of this License, through a
publicly available network server or other readily accessible means,
@ -510,7 +510,7 @@ covered work in a country, or your recipient's use of the covered work
in a country, would infringe one or more identifiable patents in that
country that you have reason to believe are valid.
If, pursuant to or in connection with a single transaction or
If, pursuant to or in connection with a single transaction or
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covered work, and grant a patent license to some of the parties
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@ -518,7 +518,7 @@ or convey a specific copy of the covered work, then the patent license
you grant is automatically extended to all recipients of the covered
work and works based on it.
A patent license is "discriminatory" if it does not include within
A patent license is "discriminatory" if it does not include within
the scope of its coverage, prohibits the exercise of, or is
conditioned on the non-exercise of one or more of the rights that are
specifically granted under this License. You may not convey a covered
@ -533,13 +533,13 @@ for and in connection with specific products or compilations that
contain the covered work, unless you entered into that arrangement,
or that patent license was granted, prior to 28 March 2007.
Nothing in this License shall be construed as excluding or limiting
Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.
12. No Surrender of Others' Freedom.
12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or
If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot convey a
covered work so as to satisfy simultaneously your obligations under this
@ -549,9 +549,9 @@ to collect a royalty for further conveying from those to whom you convey
the Program, the only way you could satisfy both those terms and this
License would be to refrain entirely from conveying the Program.
13. Use with the GNU Affero General Public License.
13. Use with the GNU Affero General Public License.
Notwithstanding any other provision of this License, you have
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU Affero General Public License into a single
combined work, and to convey the resulting work. The terms of this
@ -560,14 +560,14 @@ but the special requirements of the GNU Affero General Public License,
section 13, concerning interaction through a network will apply to the
combination as such.
14. Revised Versions of this License.
14. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions of
The Free Software Foundation may publish revised and/or new versions of
the GNU General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the
Each version is given a distinguishing version number. If the
Program specifies that a certain numbered version of the GNU General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
@ -576,19 +576,19 @@ Foundation. If the Program does not specify a version number of the
GNU General Public License, you may choose any version ever published
by the Free Software Foundation.
If the Program specifies that a proxy can decide which future
If the Program specifies that a proxy can decide which future
versions of the GNU General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.
Later license versions may give you additional or different
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
15. Disclaimer of Warranty.
15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
@ -597,9 +597,9 @@ PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
16. Limitation of Liability.
16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
@ -609,14 +609,13 @@ PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
END OF TERMS AND CONDITIONS

51
README.md
View file

@ -6,16 +6,14 @@ from MySQL to PostgreSQL as easy and smooth as possible.</p>
<h3>KEY FEATURES</h3>
<ul>
<li> Ease of use - the only thing needed to run this app is the Node.js runtime.</li>
<li> Accuracy of migration the database structure - NMIG converts
<li> Precise migration of the database structure - NMIG converts
MySQL data types to corresponding PostgreSQL data types, creates constraints,
indexes, primary and foreign keys exactly as they were before migration.</li>
<li>Ability to migrate big databases - in order to reduce RAM consumption NMIG will split each table's data into several chunks. <br />
Chunk size can be adjusted easily via configuration file.</li>
<li>Ability to migrate big databases - in order to eliminate "process out of memory" issues NMIG will split each table's data into several chunks.<br>Each group of chunks will be loaded via separate worker process.</li>
<li> Speed of data transfer - in order to migrate data fast NMIG uses PostgreSQL COPY protocol.</li>
<li>Ability to recover migration process if disaster took place (without restarting from the beginning).</li>
<li>Ease of monitoring - NMIG will provide detailed output about every step, it takes during the execution.</li>
<li>
Ease of configuration - all the parameters required for migration should be put in one single JSON document.
@ -24,7 +22,7 @@ Chunk size can be adjusted easily via configuration file.</li>
<h3>SYSTEM REQUIREMENTS</h3>
<ul>
<li> <b>Node.js 5.x.x</b></li>
<li> <b>Node.js 5 or greater</b></li>
</ul>
<h3>USAGE</h3>
@ -35,39 +33,34 @@ Chunk size can be adjusted easily via configuration file.</li>
<b>Sample:</b>&nbsp;<code>/path/to/nmig</code></p>
<p><b>3.</b> Edit configuration file located at <code>/path/to/nmig/config.json</code> with correct details.<br /></p>
<b>Remarks:</b>
<b>Notes:</b>
<ul>
<li> config.json contains brief description of each configuration parameter</li>
<li>Make sure, that username, you use in your PostgreSQL connection details, defined as superuser (usually "postgres")<br> More info: <a href="http://www.postgresql.org/docs/current/static/app-createuser.html">http://www.postgresql.org/docs/current/static/app-createuser.html</a></li>
</ul>
<p><b>4.</b> Go to nmig directory, install dependencies, and run the app with <code>--expose-gc</code> flag<br />
<p><b>4.</b> Go to nmig directory, install dependencies, and run the app<br />
&nbsp;&nbsp;&nbsp;&nbsp;<b>Sample:</b><br />
<pre>$ cd /path/to/nmig</pre><br />
<pre>$ npm install</pre><br />
<pre>$ node --expose-gc main.js</pre><br />
</p>
<p>
&nbsp;&nbsp;
<b>Remark</b>: you can increase node.js memory limit (RAM usage) using <code>--max-old-space-size</code> flag<br />
</p>
<p>
&nbsp;&nbsp;
Following command will increase memory limit to ~2GB and run nmig
<br />&nbsp;&nbsp;<code>$ node --max-old-space-size=2048 --expose-gc main.js</code>
<pre>$ node nmig.js</pre><br />
</p>
<p><b>5.</b> At the end of migration check log files, if necessary.<br />&nbsp;&nbsp;&nbsp;
<p><b>5.</b> If a disaster took place during migration (for what ever reason) - simply restart the process
<code>$ node nmig.js</code><br>&nbsp;&nbsp;&nbsp;&nbsp;NMIG will restart from the point it was stopped at.
</p>
<p><b>6.</b> At the end of migration check log files, if necessary.<br />&nbsp;&nbsp;&nbsp;
Log files will be located under "logs_directory" folder in the root of the package.<br />&nbsp;&nbsp;&nbsp;
<b>Note:</b> "logs_directory" will be created during script execution.</p>
<p><b>6.</b> In case of any remarks, misunderstandings or errors during migration,<br /> &nbsp;&nbsp;&nbsp;
<p><b>7.</b> In case of any remarks, misunderstandings or errors during migration,<br /> &nbsp;&nbsp;&nbsp;
please feel free to email me
<a href="mailto:anatolyuss@gmail.com?subject=NMIG">anatolyuss@gmail.com</a></p>
<h3>VERSION</h3>
<p>Current version is 1.1.1<br />
<p>Current version is 2.1.0<br />
(major version . improvements . bug fixes)</p>
@ -78,18 +71,22 @@ which includes data types mapping, creation of tables, constraints, indexes, <br
PKs, FKs, migration of data, garbage-collection (VACUUM) and analyzing the newly created <br />
PostgreSQL database took 1 minute 18 seconds.</p>
<p>
<b>Remark:</b>&nbsp; it is highly recommended to VACUUM newly created database! <br />
<b>Note:</b>&nbsp; it is highly recommended to VACUUM newly created database! <br />
Just keep in mind, that VACUUM is a very time-consuming procedure. <br />
So if you are short in time - disable VACUUM via config.json ("no_vacuum" parameter). <br />
Such step will save you ~25% of migration time. <br />
The migration process described above without VACUUM took 58 seconds only.
</p>
<h3>LICENSE</h3>
<p>NMIG is available under "GNU GENERAL PUBLIC LICENSE" (v. 3) <br />
<a href="http://www.gnu.org/licenses/gpl.txt">http://www.gnu.org/licenses/gpl.txt.</a></p>
<h3>REMARKS</h3>
<p>Errors/Exceptions are not passed silently.<br />
Any error will be immediately written into the error log file.</p>
<h3>KNOWN ISSUES</h3>
<ul>
<li>Empty strings in char/varchar columns may be interpreted as NULL.</li>
</ul>
<h3>LICENSE</h3>
<p>NMIG is available under "GNU GENERAL PUBLIC LICENSE" (v. 3) <br />
<a href="http://www.gnu.org/licenses/gpl.txt">http://www.gnu.org/licenses/gpl.txt.</a></p>

31
config.json Normal file → Executable file
View file

@ -37,12 +37,19 @@
],
"max_pool_size_target" : 10,
"pipe_width_description" : [
"pipe_width_description" : [
"Maximal amount of data-chunks, processed in a single 'DataPipe' iteration.",
"Note: 'pipe_width' should not be greater than 'max_pool_size_target'."
],
"pipe_width" : 10,
"loader_max_old_space_size_description" : [
"V8 memory limit of the loader process.",
"Possible values are: any number, representing memory limit (in MB),",
"or DEFAULT, representing V8 default limit for your current hardware."
],
"loader_max_old_space_size" : "DEFAULT",
"encoding_description" : [
"JavaScript encoding type.",
"If not supplied, then utf-8 will be used as a default."
@ -56,18 +63,10 @@
"schema" : "public",
"data_chunk_size_description" : [
"During migration each table's data will be split into chunks of data_chunk_size (in KB).",
"If not supplied, then 100 KB will be used as a default."
"During migration each table's data will be split into chunks of data_chunk_size (in MB).",
"If not supplied, then 1 MB will be used as a default."
],
"data_chunk_size" : 100,
"copy_only_description" : [
"During migration each table's data will be split into chunks, and each chunk will be transmitted via COPY protocol.",
"By default, if transmission via COPY fails then current chunk's data will be transmitted via INSERT statments, which may last considerably longer.",
"This behavior can be disabled for tables, included into the list (Array) below."
],
"copy_only" : [],
"data_chunk_size" : 1,
"no_vacuum_description" : [
"PostgreSQL VACUUM reclaims storage occupied by dead tuples. VACUUM is a very time-consuming procedure.",
"By default, VACUUM will be performed automatically after migration (recommended)",
@ -79,6 +78,12 @@
"List (Array) of tables, that will not be migrated.",
"By default, nmig will migrate all tables"
],
"exclude_tables": []
"exclude_tables": [],
"migrate_only_data_description" : [
"In order to skip schema migration, and just migrate data into a preset schema",
" - set this parameter true"
],
"migrate_only_data" : false
}

69
migration/fmtp/CleanupProcessor.js Normal file
View file

@ -0,0 +1,69 @@
/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const log = require('./Logger');
const generateError = require('./ErrorGenerator');
const directoriesManager = require('./DirectoriesManager');
/**
* Closes DB connections.
*
* @param {Conversion} self
* @returns {Promise}
*/
function closeConnections(self) {
return new Promise(resolve => {
if (self._mysql) {
self._mysql.end(error => {
if (error) {
log(self, '\t--[closeConnections] ' + error);
}
log(self, '\t--[closeConnections] All DB connections to both MySQL and PostgreSQL servers have been closed...');
self._pg = null;
resolve();
});
} else {
log(self, '\t--[closeConnections] All DB connections to both MySQL and PostgreSQL servers have been closed...');
self._pg = null;
resolve();
}
});
}
/**
* Closes DB connections and removes the "./temporary_directory".
*
* @param {Conversion} self
* @returns {Promise}
*/
module.exports = function(self) {
return new Promise(resolve => {
log(self, '\t--[cleanup] Cleanup resources...');
return directoriesManager.removeTemporaryDirectory(self).then(() => {
return closeConnections(self);
}).then(() => {
log(self, '\t--[cleanup] Cleanup finished...');
resolve();
});
});
};

4
migration/fmtp/ColumnsDataArranger.js
View file

@ -51,8 +51,8 @@ module.exports = function(arrTableColumns) {
|| arrTableColumns[i].Type.indexOf('date') !== -1
) {
strRetVal += 'IF(`' + arrTableColumns[i].Field
+ '` IN(\'0000-00-00\', \'0000-00-00 00:00:00\'), \'-INFINITY\', `'
+ arrTableColumns[i].Field + '`),';
+ '` IN(\'0000-00-00\', \'0000-00-00 00:00:00\'), \'-INFINITY\', CAST(`'
+ arrTableColumns[i].Field + '` AS CHAR)),';
} else {
strRetVal += '`' + arrTableColumns[i].Field + '`,';
}

158
migration/fmtp/CommentsProcessor.js Normal file
View file

@ -0,0 +1,158 @@
/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const log = require('./Logger');
const generateError = require('./ErrorGenerator');
const connect = require('./Connector');
/**
* Create table comments.
*
* @param {Conversion} self
* @param {String} tableName
* @returns {Promise}
*/
function processTableComments(self, tableName) {
return new Promise(resolve => {
self._mysql.getConnection((error, connection) => {
if (error) {
// The connection is undefined.
generateError(self, '\t--[processTableComments] Cannot connect to MySQL server...\n\t' + error);
resolve();
} else {
let sql = "SELECT table_comment AS table_comment "
+ "FROM information_schema.tables "
+ "WHERE table_schema = '" + self._mySqlDbName + "' "
+ "AND table_name = '" + tableName + "';";
connection.query(sql, (err, rows) => {
connection.release();
if (err) {
generateError(self, '\t--[processTableComments] ' + err, sql);
resolve();
} else {
self._pg.connect((e, client, done) => {
if (e) {
let msg = '\t--[processTableComments] Cannot connect to PostgreSQL server...\n' + e;
generateError(self, msg);
resolve();
} else {
sql = 'COMMENT ON TABLE "' + self._schema + '"."' + tableName + '" IS ' + '\'' + rows[0].table_comment + '\';';
client.query(sql, queryError => {
done();
if (queryError) {
let msg = '\t--[processTableComments] Error while processing comment for "'
+ self._schema + '"."' + tableName + '"...\n' + queryError;
generateError(self, msg, sql);
resolve();
} else {
let success = '\t--[processTableComments] Successfully set comment for table "'
+ self._schema + '"."' + tableName + '"';
log(self, success, self._dicTables[tableName].tableLogPath);
resolve();
}
});
}
});
}
});
}
});
});
}
/**
* Create columns comments.
*
* @param {Conversion} self
* @param {String} tableName
* @returns {Promise}
*/
function processColumnsComments(self, tableName) {
return new Promise(resolve => {
let arrCommentPromises = [];
for (let i = 0; i < self._dicTables[tableName].arrTableColumns.length; ++i) {
if (self._dicTables[tableName].arrTableColumns[i].Comment !== '') {
arrCommentPromises.push(
new Promise(resolveComment => {
self._pg.connect((error, client, done) => {
if (error) {
let msg = '\t--[processColumnsComments] Cannot connect to PostgreSQL server...\n' + error;
generateError(self, msg);
resolveComment();
} else {
let sql = 'COMMENT ON COLUMN "' + self._schema + '"."' + tableName + '"."'
+ self._dicTables[tableName].arrTableColumns[i].Field
+ '" IS \'' + self._dicTables[tableName].arrTableColumns[i].Comment + '\';';
client.query(sql, err => {
done();
if (err) {
let msg = '\t--[processColumnsComments] Error while processing comment for "' + self._schema + '"."'
+ tableName + '"."' + self._dicTables[tableName].arrTableColumns[i].Field + '"...\n' + err;
generateError(self, msg, sql);
resolveComment();
} else {
let success = '\t--[processColumnsComments] Set comment for "' + self._schema + '"."' + tableName
+ '" column: "' + self._dicTables[tableName].arrTableColumns[i].Field + '"...';
log(self, success, self._dicTables[tableName].tableLogPath);
resolveComment();
}
});
}
});
})
);
}
}
Promise.all(arrCommentPromises).then(() => resolve());
});
}
/**
* Migrate comments.
*
* @param {Conversion} self
* @param {String} tableName
* @returns {Promise}
*/
module.exports = function(self, tableName) {
return connect(self).then(() => {
return new Promise(resolve => {
let msg = '\t--[CommentsProcessor] Creates comments for table "' + self._schema + '"."' + tableName + '"...';
log(self, msg, self._dicTables[tableName].tableLogPath);
let tableCommentsPromise = processTableComments(self, tableName);
let columnsCommentsPromise = processColumnsComments(self, tableName);
Promise.all([tableCommentsPromise, columnsCommentsPromise]).then(() => resolve());
});
});
};

85
migration/fmtp/Connector.js Normal file
View file

@ -0,0 +1,85 @@
/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const mysql = require('mysql');
const pg = require('pg');
const log = require('./Logger');
const generateError = require('./ErrorGenerator');
const generateReport = require('./ReportGenerator');
/**
* Check if both servers are connected.
* If not, than create connections.
* Kill current process if can not connect.
*
* @param {Conversion} self
* @returns {Promise}
*/
module.exports = function(self) {
return new Promise(resolve => {
let mysqlConnectionPromise = new Promise((mysqlResolve, mysqlReject) => {
if (!self._mysql) {
self._sourceConString.connectionLimit = self._maxPoolSizeSource;
let pool = mysql.createPool(self._sourceConString);
if (pool) {
self._mysql = pool;
mysqlResolve();
} else {
log(self, '\t--[connect] Cannot connect to MySQL server...');
mysqlReject();
}
} else {
mysqlResolve();
}
});
let pgConnectionPromise = new Promise((pgResolve, pgReject) => {
if (!self._pg) {
self._targetConString.max = self._maxPoolSizeTarget;
let pool = new pg.Pool(self._targetConString);
if (pool) {
self._pg = pool;
self._pg.on('error', error => {
let message = 'Cannot connect to PostgreSQL server...\n' + error.message + '\n' + error.stack;
generateError(self, message);
generateReport(self, message);
});
pgResolve();
} else {
log(self, '\t--[connect] Cannot connect to PostgreSQL server...');
pgReject();
}
} else {
pgResolve();
}
});
Promise.all([mysqlConnectionPromise, pgConnectionPromise]).then(
() => resolve(),
() => generateReport(self, 'NMIG just failed to establish db-connections.')
);
});
};

108
migration/fmtp/ConsistencyEnforcer.js Normal file
View file

@ -0,0 +1,108 @@
/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
/**
* Update consistency state.
*
* @param {Conversion} self
* @param {Number} dataPoolId
* @returns {Promise}
*/
function updateConsistencyState(self, dataPoolId) {
return new Promise(resolve => {
self._pg.connect((error, client, done) => {
if (error) {
generateError(self, '\t--[ConsistencyEnforcer.updateConsistencyState] Cannot connect to PostgreSQL server...\n' + error);
resolve();
} else {
let sql = 'UPDATE "' + self._schema + '"."data_pool_' + self._schema
+ self._mySqlDbName + '" SET is_started = TRUE WHERE id = ' + dataPoolId + ';';
client.query(sql, err => {
done();
if (err) {
generateError(self, '\t--[ConsistencyEnforcer.updateConsistencyState] ' + err, sql);
}
resolve();
});
}
});
});
}
/**
* Get consistency state.
*
* @param {Conversion} self
* @param {Number} dataPoolId
* @returns {Promise}
*/
function getConsistencyState(self, dataPoolId) {
return new Promise(resolve => {
self._pg.connect((error, client, done) => {
if (error) {
generateError(self, '\t--[ConsistencyEnforcer.getConsistencyState] Cannot connect to PostgreSQL server...\n' + error);
resolve(false);
} else {
let sql = 'SELECT is_started AS is_started FROM "' + self._schema + '"."data_pool_' + self._schema
+ self._mySqlDbName + '" WHERE id = ' + dataPoolId + ';';
client.query(sql, (err, data) => {
done();
if (err) {
generateError(self, '\t--[ConsistencyEnforcer.getConsistencyState] ' + err, sql);
resolve(false);
} else {
resolve(data.rows[0].is_started);
}
});
}
});
});
}
/**
* Enforce consistency before processing a chunk of data.
* Ensure there are no any data duplications.
* In case of normal execution - it is a good practice.
* In case of rerunning nmig after unexpected failure - it is absolutely mandatory.
*
* @param {Conversion} self
* @param {Number} chunkId
* @returns {Promise}
*/
module.exports = function(self, chunkId) {
return new Promise(resolve => {
getConsistencyState(self, chunkId).then(isStarted => {
if (isStarted) {
// Current data chunk runs after a disaster recovery.
resolve(false);
} else {
// Normal migration flow.
updateConsistencyState(self, chunkId).then(() => resolve(true));
}
})
});
};

83
migration/fmtp/Conversion.js Normal file
View file

@ -0,0 +1,83 @@
/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software= you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License.
*
* This program is distributed in the hope that it will be useful;
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not; see <http=//www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const isIntNumeric = require('./IntegerValidator');
/**
* Constructor.
*
* @param {Object} config
*/
module.exports = function Conversion(config) {
this._config = config;
this._sourceConString = this._config.source;
this._targetConString = this._config.target;
this._tempDirPath = this._config.tempDirPath;
this._logsDirPath = this._config.logsDirPath;
this._dataTypesMapAddr = __dirname + '/DataTypesMap.json';
this._allLogsPath = this._logsDirPath + '/all.log';
this._errorLogsPath = this._logsDirPath + '/errors-only.log';
this._notCreatedViewsPath = this._logsDirPath + '/not_created_views';
this._noVacuum = this._config.no_vacuum;
this._excludeTables = this._config.exclude_tables;
this._timeBegin = new Date();
this._encoding = this._config.encoding === undefined ? 'utf8' : this._config.encoding;
this._dataChunkSize = this._config.data_chunk_size === undefined ? 1 : +this._config.data_chunk_size;
this._dataChunkSize = this._dataChunkSize < 1 ? 1 : this._dataChunkSize;
this._0777 = '0777';
this._mysql = null;
this._pg = null;
this._tablesToMigrate = [];
this._viewsToMigrate = [];
this._tablesCnt = 0;
this._viewsCnt = 0;
this._dataPool = [];
this._dicTables = Object.create(null);
this._mySqlDbName = this._sourceConString.database;
this._schema = this._config.schema === undefined ||
this._config.schema === ''
? this._mySqlDbName
: this._config.schema;
this._maxPoolSizeSource = this._config.max_pool_size_source !== undefined &&
isIntNumeric(this._config.max_pool_size_source)
? +this._config.max_pool_size_source
: 10;
this._maxPoolSizeTarget = this._config.max_pool_size_target !== undefined &&
isIntNumeric(this._config.max_pool_size_target)
? +this._config.max_pool_size_target
: 10;
this._maxPoolSizeSource = this._maxPoolSizeSource > 0 ? this._maxPoolSizeSource : 10;
this._maxPoolSizeTarget = this._maxPoolSizeTarget > 0 ? this._maxPoolSizeTarget : 10;
this._pipeWidth = this._config.pipe_width !== undefined &&
isIntNumeric(this._config.pipe_width)
? +this._config.pipe_width
: this._maxPoolSizeTarget;
this._pipeWidth = this._pipeWidth > this._maxPoolSizeTarget ? this._maxPoolSizeTarget : this._pipeWidth;
this._loaderMaxOldSpaceSize = this._config.loader_max_old_space_size;
this._loaderMaxOldSpaceSize = isIntNumeric(this._loaderMaxOldSpaceSize) ? this._loaderMaxOldSpaceSize : 'DEFAULT';
this._migrateOnlyData = this._config.migrate_only_data;
};

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/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const connect = require('./Connector');
const log = require('./Logger');
const generateError = require('./ErrorGenerator');
const arrangeColumnsData = require('./ColumnsDataArranger');
/**
* Prepares an array of tables and chunk offsets.
*
* @param {Conversion} self
* @param {String} tableName
* @param {Boolean} haveDataChunksProcessed
* @returns {Promise}
*/
module.exports = function(self, tableName, haveDataChunksProcessed) {
return connect(self).then(() => {
return new Promise(resolve => {
if (haveDataChunksProcessed) {
return resolve();
}
self._mysql.getConnection((error, connection) => {
if (error) {
// The connection is undefined.
generateError(self, '\t--[prepareDataChunks] Cannot connect to MySQL server...\n\t' + error);
resolve();
} else {
// Determine current table size, apply "chunking".
let sql = "SELECT ((data_length + index_length) / 1024 / 1024) AS size_in_mb "
+ "FROM information_schema.tables "
+ "WHERE table_schema = '" + self._mySqlDbName + "' "
+ "AND table_name = '" + tableName + "';";
connection.query(sql, (err, rows) => {
if (err) {
connection.release();
generateError(self, '\t--[prepareDataChunks] ' + err, sql);
resolve();
} else {
let tableSizeInMb = +rows[0].size_in_mb;
tableSizeInMb = tableSizeInMb < 1 ? 1 : tableSizeInMb;
rows = null;
let strSelectFieldList = arrangeColumnsData(self._dicTables[tableName].arrTableColumns);
sql = 'SELECT COUNT(1) AS rows_count FROM `' + tableName + '`;';
connection.query(sql, (err2, rows2) => {
connection.release();
if (err2) {
generateError(self, '\t--[prepareDataChunks] ' + err2, sql);
resolve();
} else {
let rowsCnt = rows2[0].rows_count;
rows2 = null;
let chunksCnt = tableSizeInMb / self._dataChunkSize;
chunksCnt = chunksCnt < 1 ? 1 : chunksCnt;
let rowsInChunk = Math.ceil(rowsCnt / chunksCnt);
let arrDataPoolPromises = [];
let msg = '\t--[prepareDataChunks] Total rows to insert into '
+ '"' + self._schema + '"."' + tableName + '": ' + rowsCnt;
log(self, msg, self._dicTables[tableName].tableLogPath);
for (let offset = 0; offset < rowsCnt; offset += rowsInChunk) {
arrDataPoolPromises.push(new Promise(resolveDataUnit => {
self._pg.connect((error, client, done) => {
if (error) {
generateError(self, '\t--[prepareDataChunks] Cannot connect to PostgreSQL server...\n' + error);
resolveDataUnit();
} else {
let strJson = '{"_tableName":"' + tableName
+ '","_selectFieldList":"' + strSelectFieldList + '",'
+ '"_offset":' + offset + ','
+ '"_rowsInChunk":' + rowsInChunk + ','
+ '"_rowsCnt":' + rowsCnt + '}';
let sql = 'INSERT INTO "' + self._schema + '"."data_pool_' + self._schema
+ self._mySqlDbName + '"("is_started", "json") VALUES(FALSE, $1);';
client.query(sql, [strJson], err => {
done();
if (err) {
generateError(self, '\t--[prepareDataChunks] INSERT failed...\n' + err, sql);
}
resolveDataUnit();
});
}
});
}));
}
Promise.all(arrDataPoolPromises).then(() => resolve());
}
});
}
});
}
});
});
});
};

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/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const fs = require('fs');
const pgCopyStreams = require('pg-copy-streams');
const csvStringify = require('./CsvStringifyModified');
const log = require('./Logger');
const generateError = require('./ErrorGenerator');
const connect = require('./Connector');
const Conversion = require('./Conversion');
const MessageToMaster = require('./MessageToMaster');
const enforceConsistency = require('./ConsistencyEnforcer');
const copyFrom = pgCopyStreams.from;
let self = null;
process.on('message', signal => {
self = new Conversion(signal.config);
let promises = [];
log(self, '\t--[loadData] Loading the data...');
for (let i = 0; i < signal.chunks.length; ++i) {
promises.push(
connect(self).then(() => {
return enforceConsistency(self, signal.chunks[i]._id);
}).then(isNormalFlow => {
if (isNormalFlow) {
return populateTableWorker(
signal.chunks[i]._tableName,
signal.chunks[i]._selectFieldList,
signal.chunks[i]._offset,
signal.chunks[i]._rowsInChunk,
signal.chunks[i]._rowsCnt,
signal.chunks[i]._id
);
}
let sql = buildChunkQuery(
signal.chunks[i]._tableName,
signal.chunks[i]._selectFieldList,
signal.chunks[i]._offset,
signal.chunks[i]._rowsInChunk
);
let strTwelveSpaces = ' ';
let rejectedData = '\n\t--[loadData] Possible data duplication alert!\n\t ' + strTwelveSpaces
+ 'Data, retrievable by following MySQL query:\n' + sql + '\n\t ' + strTwelveSpaces
+ 'may already be migrated.\n\t' + strTwelveSpaces + ' Please, check it.';
log(self, rejectedData, self._logsDirPath + '/' + signal.chunks[i]._tableName + '.log');
return deleteChunk(signal.chunks[i]._id);
})
);
}
Promise.all(promises).then(() => process.send('processed'));
});
/**
* Delete given record from the data-pool.
*
* @param {Number} dataPoolId
* @param {Node-pg client|undefined} client
* @param {Function|undefined} done
* @returns {Promise}
*/
function deleteChunk(dataPoolId, client, done) {
return new Promise(resolve => {
if (client) {
let sql = 'DELETE FROM "' + self._schema + '"."data_pool_' + self._schema + self._mySqlDbName + '" ' + 'WHERE id = ' + dataPoolId + ';';
client.query(sql, err => {
done();
if (err) {
generateError(self, '\t--[deleteChunk] ' + err, sql);
}
resolve();
});
} else {
self._pg.connect((error, client, done) => {
if (error) {
generateError(self, '\t--[deleteChunk] Cannot connect to PostgreSQL server...\n' + error);
resolve();
} else {
let sql = 'DELETE FROM "' + self._schema + '"."data_pool_' + self._schema + self._mySqlDbName + '" ' + 'WHERE id = ' + dataPoolId + ';';
client.query(sql, err => {
done();
if (err) {
generateError(self, '\t--[deleteChunk] ' + err, sql);
}
resolve();
});
}
});
}
});
}
/**
* Delete given csv file.
*
* @param {String} csvAddr
* @param {FileDescriptor} fd
* @returns {Promise}
*/
function deleteCsv(csvAddr, fd) {
return new Promise(resolve => {
fs.unlink(csvAddr, () => {
fs.close(fd, () => {
resolve();
});
});
});
}
/**
* Build a MySQL query to retrieve the chunk of data.
*
* @param {String} tableName
* @param {String} strSelectFieldList
* @param {Number} offset
* @param {Number} rowsInChunk
* @returns {String}
*/
function buildChunkQuery(tableName, strSelectFieldList, offset, rowsInChunk) {
return 'SELECT ' + strSelectFieldList + ' FROM `' + tableName + '` LIMIT ' + offset + ',' + rowsInChunk + ';';
}
/**
* Load a chunk of data using "PostgreSQL COPY".
*
* @param {String} tableName
* @param {String} strSelectFieldList
* @param {Number} offset
* @param {Number} rowsInChunk
* @param {Number} rowsCnt
* @param {Number} dataPoolId
* @returns {Promise}
*/
function populateTableWorker(tableName, strSelectFieldList, offset, rowsInChunk, rowsCnt, dataPoolId) {
return new Promise(resolvePopulateTableWorker => {
self._mysql.getConnection((error, connection) => {
if (error) {
// The connection is undefined.
generateError(self, '\t--[populateTableWorker] Cannot connect to MySQL server...\n\t' + error);
resolvePopulateTableWorker();
} else {
let csvAddr = self._tempDirPath + '/' + tableName + offset + '.csv';
let sql = buildChunkQuery(tableName, strSelectFieldList, offset, rowsInChunk);
connection.query(sql, (err, rows) => {
connection.release();
if (err) {
generateError(self, '\t--[populateTableWorker] ' + err, sql);
resolvePopulateTableWorker();
} else {
rowsInChunk = rows.length;
csvStringify(rows, (csvError, csvString) => {
rows = null;
if (csvError) {
generateError(self, '\t--[populateTableWorker] ' + csvError);
resolvePopulateTableWorker();
} else {
let buffer = new Buffer(csvString, self._encoding);
csvString = null;
fs.open(csvAddr, 'w', self._0777, (csvErrorFputcsvOpen, fd) => {
if (csvErrorFputcsvOpen) {
buffer = null;
generateError(self, '\t--[populateTableWorker] ' + csvErrorFputcsvOpen);
resolvePopulateTableWorker();
} else {
fs.write(fd, buffer, 0, buffer.length, null, csvErrorFputcsvWrite => {
buffer = null;
if (csvErrorFputcsvWrite) {
generateError(self, '\t--[populateTableWorker] ' + csvErrorFputcsvWrite);
resolvePopulateTableWorker();
} else {
self._pg.connect((error, client, done) => {
if (error) {
generateError(self, '\t--[populateTableWorker] Cannot connect to PostgreSQL server...\n' + error, sql);
deleteCsv(csvAddr, fd).then(() => resolvePopulateTableWorker());
} else {
let sqlCopy = 'COPY "' + self._schema + '"."' + tableName + '" FROM STDIN DELIMITER \'' + ',\'' + ' CSV;';
let stream = client.query(copyFrom(sqlCopy));
let readStream = fs.createReadStream(csvAddr);
readStream.on('end', () => {
/*
* COPY FROM STDIN does not return the number of rows inserted.
* But the transactional behavior still applies (no records inserted if at least one failed).
* That is why in case of 'on end' the rowsInChunk value is actually the number of records inserted.
*/
process.send(new MessageToMaster(tableName, rowsInChunk, rowsCnt));
deleteChunk(dataPoolId, client, done).then(() => {
deleteCsv(csvAddr, fd).then(() => resolvePopulateTableWorker());
});
});
readStream.on('error', readStreamError => {
generateError(self, '\t--[populateTableWorker] ' + readStreamError, sqlCopy);
let rejectedData = '\t--[populateTableWorker] Error loading table data:\n' + sql + '\n';
log(self, rejectedData, self._logsDirPath + '/' + tableName + '.log');
deleteChunk(dataPoolId, client, done).then(() => {
deleteCsv(csvAddr, fd).then(() => resolvePopulateTableWorker());
});
});
readStream.pipe(stream);
}
});
}
});
}
});
}
});
}
});
}
});
});
}

129
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@ -0,0 +1,129 @@
/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const connect = require('./Connector');
const log = require('./Logger');
const generateError = require('./ErrorGenerator');
/**
* Create the "{schema}"."data_pool_{self._schema + self._mySqlDbName} temporary table."
*
* @param {Conversion} self
* @returns {Promise}
*/
module.exports.createDataPoolTable = function(self) {
return connect(self).then(() => {
return new Promise((resolve, reject) => {
self._pg.connect((error, client, done) => {
if (error) {
generateError(self, '\t--[DataPoolManager.createDataPoolTable] Cannot connect to PostgreSQL server...\n' + error);
reject();
} else {
let sql = 'CREATE TABLE IF NOT EXISTS "' + self._schema + '"."data_pool_' + self._schema + self._mySqlDbName
+ '"("id" BIGSERIAL, "json" TEXT, "is_started" BOOLEAN);';
client.query(sql, err => {
done();
if (err) {
generateError(self, '\t--[DataPoolManager.createDataPoolTable] ' + err, sql);
reject();
} else {
log(self, '\t--[DataPoolManager.createDataPoolTable] table "' + self._schema + '"."data_pool_' + self._schema + self._mySqlDbName + '" is created...');
resolve();
}
});
}
});
});
});
};
/**
* Drop the "{schema}"."data_pool_{self._schema + self._mySqlDbName} temporary table."
*
* @param {Conversion} self
* @returns {Promise}
*/
module.exports.dropDataPoolTable = function(self) {
return connect(self).then(() => {
return new Promise(resolve => {
self._pg.connect((error, client, done) => {
if (error) {
generateError(self, '\t--[DataPoolManager.dropDataPoolTable] Cannot connect to PostgreSQL server...\n' + error);
resolve();
} else {
let sql = 'DROP TABLE "' + self._schema + '"."data_pool_' + self._schema + self._mySqlDbName + '";';
client.query(sql, err => {
done();
if (err) {
generateError(self, '\t--[DataPoolManager.dropDataPoolTable] ' + err, sql);
} else {
log(self, '\t--[DataPoolManager.dropDataPoolTable] table "' + self._schema + '"."data_pool_' + self._schema + self._mySqlDbName + '" is dropped...');
}
resolve();
});
}
});
});
});
};
/**
* Reads temporary table, and generates Data-pool.
*
* @param {Conversion} self
* @returns {Promise}
*/
module.exports.readDataPool = function(self) {
return connect(self).then(() => {
return new Promise((resolve, reject) => {
self._pg.connect((error, client, done) => {
if (error) {
generateError(self, '\t--[DataPoolManager.readDataPool] Cannot connect to PostgreSQL server...\n' + error);
reject();
} else {
let sql = 'SELECT id AS id, json AS json FROM "' + self._schema + '"."data_pool_' + self._schema + self._mySqlDbName + '";';
client.query(sql, (err, arrDataPool) => {
done();
if (err) {
generateError(self, '\t--[DataPoolManager.readDataPool] ' + err, sql);
return reject();
}
for (let i = 0; i < arrDataPool.rows.length; ++i) {
let obj = JSON.parse(arrDataPool.rows[i].json);
obj._id = arrDataPool.rows[i].id;
self._dataPool.push(obj);
}
log(self, '\t--[DataPoolManager.readDataPool] Data-Pool is loaded...');
resolve();
});
}
});
});
});
};

10
migration/fmtp/DataTypesMap.json
View file

@ -49,7 +49,7 @@
},
"bigint" : {
"increased_size" : "numeric",
"increased_size" : "bigint",
"type" : "bigint",
"mySqlVarLenPgSqlFixedLen" : true
},
@ -77,7 +77,7 @@
"type" : "geometry",
"mySqlVarLenPgSqlFixedLen" : false
},
"numeric" : {
"increased_size" : "",
"type" : "numeric",
@ -156,6 +156,12 @@
"mySqlVarLenPgSqlFixedLen" : false
},
"set" : {
"increased_size" : "",
"type" : "character varying(255)",
"mySqlVarLenPgSqlFixedLen" : false
},
"tinytext" : {
"increased_size" : "",
"type" : "text",

50
migration/fmtp/DataTypesMapReader.js Normal file
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@ -0,0 +1,50 @@
/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const fs = require('fs');
/**
* Reads "./DataTypesMap.json" and converts its json content to js object.
* Appends this object to "FromMySQL2PostgreSQL" instance.
*
* @param {Conversion} self
* @returns {Promise}
*/
module.exports = function(self) {
return new Promise((resolve, reject) => {
fs.readFile(self._dataTypesMapAddr, (error, data) => {
if (error) {
console.log('\t--[readDataTypesMap] Cannot read "DataTypesMap" from ' + self._dataTypesMapAddr);
reject();
} else {
try {
self._dataTypesMap = JSON.parse(data.toString());
console.log('\t--[readDataTypesMap] Data Types Map is loaded...');
resolve();
} catch (err) {
console.log('\t--[readDataTypesMap] Cannot parse JSON from' + self._dataTypesMapAddr);
reject();
}
}
});
});
};

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/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const connect = require('./Connector');
const log = require('./Logger');
const generateError = require('./ErrorGenerator');
/**
* Checks if given value is float number.
*
* @param {String|Number} value
* @returns {Boolean}
*/
function isFloatNumeric(value) {
return !isNaN(parseFloat(value)) && isFinite(value);
}
/**
* Define which columns of the given table have default value.
* Set default values, if need.
*
* @param {Conversion} self
* @param {String} tableName
* @returns {Promise}
*/
module.exports = function(self, tableName) {
return connect(self).then(() => {
return new Promise(resolve => {
log(self, '\t--[processDefault] Defines default values for table: "' + self._schema + '"."' + tableName + '"', self._dicTables[tableName].tableLogPath);
let processDefaultPromises = [];
let sqlReservedValues = {
'CURRENT_DATE' : 'CURRENT_DATE',
'0000-00-00' : "'-INFINITY'",
'CURRENT_TIME' : 'CURRENT_TIME',
'00:00:00' : '00:00:00',
'CURRENT_TIMESTAMP' : 'CURRENT_TIMESTAMP',
'0000-00-00 00:00:00' : "'-INFINITY'",
'LOCALTIME' : 'LOCALTIME',
'LOCALTIMESTAMP' : 'LOCALTIMESTAMP',
'NULL' : 'NULL',
'UTC_DATE' : "(CURRENT_DATE AT TIME ZONE 'UTC')",
'UTC_TIME' : "(CURRENT_TIME AT TIME ZONE 'UTC')",
'UTC_TIMESTAMP' : "(NOW() AT TIME ZONE 'UTC')"
};
for (let i = 0; i < self._dicTables[tableName].arrTableColumns.length; ++i) {
if (self._dicTables[tableName].arrTableColumns[i].Default) {
processDefaultPromises.push(
new Promise(resolveProcessDefault => {
self._pg.connect((error, client, done) => {
if (error) {
let msg = '\t--[processDefault] Cannot connect to PostgreSQL server...\n' + error;
generateError(self, msg);
resolveProcessDefault();
} else {
let sql = 'ALTER TABLE "' + self._schema + '"."' + tableName
+ '" ' + 'ALTER COLUMN "' + self._dicTables[tableName].arrTableColumns[i].Field + '" SET DEFAULT ';
if (sqlReservedValues[self._dicTables[tableName].arrTableColumns[i].Default]) {
sql += sqlReservedValues[self._dicTables[tableName].arrTableColumns[i].Default] + ';';
} else {
sql += isFloatNumeric(self._dicTables[tableName].arrTableColumns[i].Default)
? self._dicTables[tableName].arrTableColumns[i].Default + ';'
: "'" + self._dicTables[tableName].arrTableColumns[i].Default + "';";
}
client.query(sql, err => {
done();
if (err) {
let msg = '\t--[processDefault] Error occurred when tried to set default value for "'
+ self._schema + '"."' + tableName
+ '"."' + self._dicTables[tableName].arrTableColumns[i].Field + '"...\n' + err;
generateError(self, msg, sql);
resolveProcessDefault();
} else {
let success = '\t--[processDefault] Set default value for "' + self._schema + '"."' + tableName
+ '"."' + self._dicTables[tableName].arrTableColumns[i].Field + '"...';
log(self, success, self._dicTables[tableName].tableLogPath);
resolveProcessDefault();
}
});
}
});
})
);
}
}
Promise.all(processDefaultPromises).then(() => resolve());
});
});
};

137
migration/fmtp/DirectoriesManager.js Normal file
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@ -0,0 +1,137 @@
/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const fs = require('fs');
const log = require('./Logger');
/**
* Creates temporary directory.
*
* @param {Conversion} self
* @returns {Promise}
*/
module.exports.createTemporaryDirectory = function(self) {
return new Promise((resolve, reject) => {
log(self, '\t--[DirectoriesManager.createTemporaryDirectory] Creating temporary directory...');
fs.stat(self._tempDirPath, (directoryDoesNotExist, stat) => {
if (directoryDoesNotExist) {
fs.mkdir(self._tempDirPath, self._0777, e => {
if (e) {
let msg = '\t--[DirectoriesManager.createTemporaryDirectory] Cannot perform a migration due to impossibility to create '
+ '"temporary_directory": ' + self._tempDirPath;
log(self, msg);
reject();
} else {
log(self, '\t--[DirectoriesManager.createTemporaryDirectory] Temporary directory is created...');
resolve();
}
});
} else if (!stat.isDirectory()) {
log(self, '\t--[DirectoriesManager.createTemporaryDirectory] Cannot perform a migration due to unexpected error');
reject();
} else {
resolve();
}
});
});
};
/**
* Removes temporary directory.
*
* @param {Conversion} self
* @returns {Promise}
*/
module.exports.removeTemporaryDirectory = function(self) {
return new Promise(resolve => {
fs.readdir(self._tempDirPath, (err, arrContents) => {
let msg = '';
if (err) {
msg = '\t--[DirectoriesManager.removeTemporaryDirectory] Note, TemporaryDirectory located at "'
+ self._tempDirPath + '" is not removed \n\t--[DirectoriesManager.removeTemporaryDirectory] ' + err;
log(self, msg);
resolve();
} else {
let promises = [];
for (let i = 0; i < arrContents.length; ++i) {
promises.push(new Promise(resolveUnlink => {
fs.unlink(self._tempDirPath + '/' + arrContents[i], () => resolveUnlink());
}));
}
Promise.all(promises).then(() => {
fs.rmdir(self._tempDirPath, error => {
if (error) {
msg = '\t--[DirectoriesManager.removeTemporaryDirectory] Note, TemporaryDirectory located at "'
+ self._tempDirPath + '" is not removed \n\t--[DirectoriesManager.removeTemporaryDirectory] ' + error;
} else {
msg = '\t--[DirectoriesManager.removeTemporaryDirectory] TemporaryDirectory located at "'
+ self._tempDirPath + '" is removed';
}
log(self, msg);
resolve();
});
});
}
});
});
};
/**
* Creates logs directory.
*
* @param {Conversion} self
* @returns {Promise}
*/
module.exports.createLogsDirectory = function(self) {
return new Promise((resolve, reject) => {
console.log('\t--[DirectoriesManager.createLogsDirectory] Creating logs directory...');
fs.stat(self._logsDirPath, (directoryDoesNotExist, stat) => {
if (directoryDoesNotExist) {
fs.mkdir(self._logsDirPath, self._0777, e => {
if (e) {
let msg = '\t--[DirectoriesManager.createLogsDirectory] Cannot perform a migration due to impossibility to create '
+ '"logs_directory": ' + self._logsDirPath;
console.log(msg);
reject();
} else {
log(self, '\t--[DirectoriesManager.createLogsDirectory] Logs directory is created...');
resolve();
}
});
} else if (!stat.isDirectory()) {
console.log('\t--[DirectoriesManager.createLogsDirectory] Cannot perform a migration due to unexpected error');
reject();
} else {
log(self, '\t--[DirectoriesManager.createLogsDirectory] Logs directory already exists...');
resolve();
}
});
});
};

85
migration/fmtp/EnumProcessor.js Normal file
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@ -0,0 +1,85 @@
/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const connect = require('./Connector');
const log = require('./Logger');
const generateError = require('./ErrorGenerator');
/**
* Define which columns of the given table are of type "enum".
* Set an appropriate constraint, if need.
*
* @param {Conversion} self
* @param {String} tableName
* @returns {Promise}
*/
module.exports = function(self, tableName) {
return connect(self).then(() => {
return new Promise(resolve => {
log(self, '\t--[processEnum] Defines "ENUMs" for table "' + self._schema + '"."' + tableName + '"', self._dicTables[tableName].tableLogPath);
let processEnumPromises = [];
for (let i = 0; i < self._dicTables[tableName].arrTableColumns.length; ++i) {
if (self._dicTables[tableName].arrTableColumns[i].Type.indexOf('(') !== -1) {
let arrType = self._dicTables[tableName].arrTableColumns[i].Type.split('(');
if (arrType[0] === 'enum') {
processEnumPromises.push(
new Promise(resolveProcessEnum => {
self._pg.connect((error, client, done) => {
if (error) {
let msg = '\t--[processEnum] Cannot connect to PostgreSQL server...\n' + error;
generateError(self, msg);
resolveProcessEnum();
} else {
let sql = 'ALTER TABLE "' + self._schema + '"."' + tableName + '" '
+ 'ADD CHECK ("' + self._dicTables[tableName].arrTableColumns[i].Field + '" IN (' + arrType[1] + ');';
client.query(sql, err => {
done();
if (err) {
let msg = '\t--[processEnum] Error while setting ENUM for "' + self._schema + '"."'
+ tableName + '"."' + self._dicTables[tableName].arrTableColumns[i].Field + '"...\n' + err;
generateError(self, msg, sql);
resolveProcessEnum();
} else {
let success = '\t--[processEnum] Set "ENUM" for "' + self._schema + '"."' + tableName
+ '"."' + self._dicTables[tableName].arrTableColumns[i].Field + '"...';
log(self, success, self._dicTables[tableName].tableLogPath);
resolveProcessEnum();
}
});
}
});
})
);
}
}
}
Promise.all(processEnumPromises).then(() => resolve());
});
});
};

40
main.js → migration/fmtp/ErrorGenerator.js
View file

@ -19,21 +19,29 @@
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const fs = require('fs');
const fmtp = require('./migration/fmtp/FromMySQL2PostgreSQL');
const nmig = new fmtp.FromMySQL2PostgreSQL();
fs.readFile(__dirname + '/config.json', (error, data) => {
if (error) {
console.log('\n\t--Cannot run migration\nCannot read configuration info from ' + __dirname + '/config.json');
} else {
try {
let config = JSON.parse(data.toString());
config.tempDirPath = __dirname + '/temporary_directory';
config.logsDirPath = __dirname + '/logs_directory';
nmig.run(config);
} catch (err) {
console.log('\n\t--Cannot parse JSON from' + __dirname + '/config.json');
const fs = require('fs');
const log = require('./Logger');
/**
* Writes a ditailed error message to the "/errors-only.log" file
*
* @param {Conversion} self
* @param {String} message
* @param {String} sql
* @returns {undefined}
*/
module.exports = function(self, message, sql) {
message += '\n\n\tSQL: ' + (sql || '') + '\n\n';
let buffer = new Buffer(message, self._encoding);
log(self, message, undefined, true);
fs.open(self._errorLogsPath, 'a', self._0777, (error, fd) => {
if (!error) {
fs.write(fd, buffer, 0, buffer.length, null, () => {
buffer = null;
fs.close(fd);
});
}
}
});
});
};

159
migration/fmtp/ForeignKeyProcessor.js Normal file
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@ -0,0 +1,159 @@
/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const log = require('./Logger');
const generateError = require('./ErrorGenerator');
const migrationStateManager = require('./MigrationStateManager');
/**
* Creates foreign keys for given table.
*
* @param {Conversion} self
* @param {String} tableName
* @param {Array} rows
* @returns {Promise}
*/
function processForeignKeyWorker(self, tableName, rows) {
return new Promise(resolve => {
let constraintsPromises = [];
let objConstraints = Object.create(null);
for (let i = 0; i < rows.length; ++i) {
if (rows[i].CONSTRAINT_NAME in objConstraints) {
objConstraints[rows[i].CONSTRAINT_NAME].column_name.push('"' + rows[i].COLUMN_NAME + '"');
objConstraints[rows[i].CONSTRAINT_NAME].referenced_column_name.push('"' + rows[i].REFERENCED_COLUMN_NAME + '"');
} else {
objConstraints[rows[i].CONSTRAINT_NAME] = Object.create(null);
objConstraints[rows[i].CONSTRAINT_NAME].column_name = ['"' + rows[i].COLUMN_NAME + '"'];
objConstraints[rows[i].CONSTRAINT_NAME].referenced_column_name = ['"' + rows[i].REFERENCED_COLUMN_NAME + '"'];
objConstraints[rows[i].CONSTRAINT_NAME].referenced_table_name = rows[i].REFERENCED_TABLE_NAME;
objConstraints[rows[i].CONSTRAINT_NAME].update_rule = rows[i].UPDATE_RULE;
objConstraints[rows[i].CONSTRAINT_NAME].delete_rule = rows[i].DELETE_RULE;
}
}
rows = null;
for (let attr in objConstraints) {
constraintsPromises.push(
new Promise(resolveConstraintPromise => {
self._pg.connect((error, client, done) => {
if (error) {
objConstraints[attr] = null;
generateError(self, '\t--[processForeignKeyWorker] Cannot connect to PostgreSQL server...');
resolveConstraintPromise();
} else {
let sql = 'ALTER TABLE "' + self._schema + '"."' + tableName + '" ADD FOREIGN KEY ('
+ objConstraints[attr].column_name.join(',') + ') REFERENCES "' + self._schema + '"."'
+ objConstraints[attr].referenced_table_name + '" (' + objConstraints[attr].referenced_column_name.join(',')
+ ') ON UPDATE ' + objConstraints[attr].update_rule + ' ON DELETE ' + objConstraints[attr].delete_rule + ';';
objConstraints[attr] = null;
client.query(sql, err => {
done();
if (err) {
generateError(self, '\t--[processForeignKeyWorker] ' + err, sql);
resolveConstraintPromise();
} else {
resolveConstraintPromise();
}
});
}
});
})
);
}
Promise.all(constraintsPromises).then(() => resolve());
});
}
/**
* Starts a process of foreign keys creation.
*
* @param {Conversion} self
* @returns {Promise}
*/
module.exports = function(self) {
return migrationStateManager.get(self, 'foreign_keys_loaded').then(isForeignKeysProcessed => {
return new Promise(resolve => {
let fkPromises = [];
if (!isForeignKeysProcessed) {
for (let i = 0; i < self._tablesToMigrate.length; ++i) {
let tableName = self._tablesToMigrate[i];
log(self, '\t--[processForeignKey] Search foreign keys for table "' + self._schema + '"."' + tableName + '"...');
fkPromises.push(
new Promise(fkResolve => {
self._mysql.getConnection((error, connection) => {
if (error) {
// The connection is undefined.
generateError(self, '\t--[processForeignKey] Cannot connect to MySQL server...\n' + error);
fkResolve();
} else {
let sql = "SELECT cols.COLUMN_NAME, refs.REFERENCED_TABLE_NAME, refs.REFERENCED_COLUMN_NAME, "
+ "cRefs.UPDATE_RULE, cRefs.DELETE_RULE, cRefs.CONSTRAINT_NAME "
+ "FROM INFORMATION_SCHEMA.`COLUMNS` AS cols "
+ "INNER JOIN INFORMATION_SCHEMA.`KEY_COLUMN_USAGE` AS refs "
+ "ON refs.TABLE_SCHEMA = cols.TABLE_SCHEMA "
+ "AND refs.REFERENCED_TABLE_SCHEMA = cols.TABLE_SCHEMA "
+ "AND refs.TABLE_NAME = cols.TABLE_NAME "
+ "AND refs.COLUMN_NAME = cols.COLUMN_NAME "
+ "LEFT JOIN INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS AS cRefs "
+ "ON cRefs.CONSTRAINT_SCHEMA = cols.TABLE_SCHEMA "
+ "AND cRefs.CONSTRAINT_NAME = refs.CONSTRAINT_NAME "
+ "LEFT JOIN INFORMATION_SCHEMA.`KEY_COLUMN_USAGE` AS links "
+ "ON links.TABLE_SCHEMA = cols.TABLE_SCHEMA "
+ "AND links.REFERENCED_TABLE_SCHEMA = cols.TABLE_SCHEMA "
+ "AND links.REFERENCED_TABLE_NAME = cols.TABLE_NAME "
+ "AND links.REFERENCED_COLUMN_NAME = cols.COLUMN_NAME "
+ "LEFT JOIN INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS AS cLinks "
+ "ON cLinks.CONSTRAINT_SCHEMA = cols.TABLE_SCHEMA "
+ "AND cLinks.CONSTRAINT_NAME = links.CONSTRAINT_NAME "
+ "WHERE cols.TABLE_SCHEMA = '" + self._mySqlDbName + "' "
+ "AND cols.TABLE_NAME = '" + tableName + "';";
connection.query(sql, (err, rows) => {
connection.release();
if (err) {
generateError(self, self, '\t--[processForeignKey] ' + err, sql);
fkResolve();
} else {
processForeignKeyWorker(self, tableName, rows).then(() => {
log(self, '\t--[processForeignKey] Foreign keys for table "' + self._schema + '"."' + tableName + '" are set...');
fkResolve();
});
}
});
}
});
})
);
}
}
Promise.all(fkPromises).then(() => resolve());
});
});
};

119
migration/fmtp/IndexAndKeyProcessor.js Normal file
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@ -0,0 +1,119 @@
/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const connect = require('./Connector');
const log = require('./Logger');
const generateError = require('./ErrorGenerator');
/**
* Create primary key and indices.
*
* @param {Conversion} self
* @param {String} tableName
* @returns {Promise}
*/
module.exports = function(self, tableName) {
return connect(self).then(() => {
return new Promise(resolveProcessIndexAndKey => {
self._mysql.getConnection((error, connection) => {
if (error) {
// The connection is undefined.
generateError(self, '\t--[processIndexAndKey] Cannot connect to MySQL server...\n\t' + error);
resolveProcessIndexAndKey();
} else {
let sql = 'SHOW INDEX FROM `' + tableName + '`;';
connection.query(sql, (err, arrIndices) => {
connection.release();
if (err) {
generateError(self, '\t--[processIndexAndKey] ' + err, sql);
resolveProcessIndexAndKey();
} else {
let objPgIndices = Object.create(null);
let cnt = 0;
let indexType = '';
let processIndexAndKeyPromises = [];
for (let i = 0; i < arrIndices.length; ++i) {
if (arrIndices[i].Key_name in objPgIndices) {
objPgIndices[arrIndices[i].Key_name].column_name.push('"' + arrIndices[i].Column_name + '"');
} else {
objPgIndices[arrIndices[i].Key_name] = {
is_unique : arrIndices[i].Non_unique === 0 ? true : false,
column_name : ['"' + arrIndices[i].Column_name + '"'],
Index_type : ' USING ' + (arrIndices[i].Index_type === 'SPATIAL' ? 'GIST' : arrIndices[i].Index_type)
};
}
}
for (let attr in objPgIndices) {
processIndexAndKeyPromises.push(
new Promise(resolveProcessIndexAndKeySql => {
self._pg.connect((pgError, pgClient, done) => {
if (pgError) {
let msg = '\t--[processIndexAndKey] Cannot connect to PostgreSQL server...\n' + pgError;
generateError(self, msg);
resolveProcessIndexAndKeySql();
} else {
if (attr.toLowerCase() === 'primary') {
indexType = 'PK';
sql = 'ALTER TABLE "' + self._schema + '"."' + tableName + '" '
+ 'ADD PRIMARY KEY(' + objPgIndices[attr].column_name.join(',') + ');';
} else {
// "schema_idxname_{integer}_idx" - is NOT a mistake.
let columnName = objPgIndices[attr].column_name[0].slice(1, -1) + cnt++;
indexType = 'index';
sql = 'CREATE ' + (objPgIndices[attr].is_unique ? 'UNIQUE ' : '') + 'INDEX "'
+ self._schema + '_' + tableName + '_' + columnName + '_idx" ON "'
+ self._schema + '"."' + tableName + '" '
+ objPgIndices[attr].Index_type + ' (' + objPgIndices[attr].column_name.join(',') + ');';
}
pgClient.query(sql, err2 => {
done();
if (err2) {
generateError(self, '\t--[processIndexAndKey] ' + err2, sql);
resolveProcessIndexAndKeySql();
} else {
resolveProcessIndexAndKeySql();
}
});
}
});
})
);
}
Promise.all(processIndexAndKeyPromises).then(() => {
let success = '\t--[processIndexAndKey] "' + self._schema + '"."' + tableName + '": PK/indices are successfully set...';
log(self, success, self._dicTables[tableName].tableLogPath);
resolveProcessIndexAndKey();
});
}
});
}
});
});
});
};

31
migration/fmtp/IntegerValidator.js Normal file
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@ -0,0 +1,31 @@
/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software= you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License.
*
* This program is distributed in the hope that it will be useful;
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not; see <http=//www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
/**
* Checks if given value is integer number.
*
* @param {String|Number} value
* @returns {Boolean}
*/
module.exports = function(value) {
return !isNaN(parseInt(value)) && isFinite(value);
};

61
migration/fmtp/Logger.js Normal file
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@ -0,0 +1,61 @@
/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const fs = require('fs');
/**
* Outputs given log.
* Writes given log to the "/all.log" file.
* If necessary, writes given log to the "/{tableName}.log" file.
*
* @param {Conversion} self
* @param {String} log
* @param {String} tableLogPath
* @param {Boolean} isErrorLog
* @returns {undefined}
*/
module.exports = function(self, log, tableLogPath, isErrorLog) {
let buffer = new Buffer(log + '\n\n', self._encoding);
if (!isErrorLog) {
console.log(log);
}
fs.open(self._allLogsPath, 'a', self._0777, (error, fd) => {
if (!error) {
fs.write(fd, buffer, 0, buffer.length, null, () => {
fs.close(fd, () => {
if (tableLogPath) {
fs.open(tableLogPath, 'a', self._0777, (error, fd) => {
if (!error) {
fs.write(fd, buffer, 0, buffer.length, null, () => {
buffer = null;
fs.close(fd);
});
}
});
}
});
});
}
});
};

239
migration/fmtp/Main.js Normal file
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@ -0,0 +1,239 @@
/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const fs = require('fs');
const childProcess = require('child_process');
const processViews = require('./ViewGenerator');
const readDataTypesMap = require('./DataTypesMapReader');
const log = require('./Logger');
const generateError = require('./ErrorGenerator');
const MessageToDataLoader = require('./MessageToDataLoader');
const Conversion = require('./Conversion');
const generateReport = require('./ReportGenerator');
const processComments = require('./CommentsProcessor');
const migrationStateManager = require('./MigrationStateManager');
const processIndexAndKey = require('./IndexAndKeyProcessor');
const processForeignKey = require('./ForeignKeyProcessor');
const createSequence = require('./SequencesProcessor');
const runVacuumFullAndAnalyze = require('./VacuumProcessor');
const processEnum = require('./EnumProcessor');
const processNull = require('./NullProcessor');
const processDefault = require('./DefaultProcessor');
const createSchema = require('./SchemaProcessor');
const cleanup = require('./CleanupProcessor');
const dataPoolManager = require('./DataPoolManager');
const directoriesManager = require('./DirectoriesManager');
const loadStructureToMigrate = require('./StructureLoader');
let self = null;
let intProcessedDataUnits = 0;
/**
* Kill a process specified by the pid.
*
* @param {Number} pid
* @returns {undefined}
*/
function killProcess(pid) {
try {
process.kill(pid);
} catch (killError) {
generateError(self, '\t--[killProcess] ' + killError);
}
}
/**
* Instructs DataLoader which DataUnits should be loaded.
* No need to check the state-log.
* If dataPool's length is zero, then nmig will proceed to the next step.
*
* @returns {undefined}
*/
function pipeData() {
if (self._dataPool.length === 0) {
return continueProcessAfterDataLoading();
}
let strDataLoaderPath = __dirname + '/DataLoader.js';
let options = self._loaderMaxOldSpaceSize === 'DEFAULT' ? {} : { execArgv: ['--max-old-space-size=' + self._loaderMaxOldSpaceSize] };
let loaderProcess = childProcess.fork(strDataLoaderPath, options);
loaderProcess.on('message', signal => {
if (typeof signal === 'object') {
self._dicTables[signal.tableName].totalRowsInserted += signal.rowsInserted;
let msg = '\t--[pipeData] For now inserted: ' + self._dicTables[signal.tableName].totalRowsInserted + ' rows, '
+ 'Total rows to insert into "' + self._schema + '"."' + signal.tableName + '": ' + signal.totalRowsToInsert;
log(self, msg);
} else {
killProcess(loaderProcess.pid);
intProcessedDataUnits += self._pipeWidth;
return intProcessedDataUnits < self._dataPool.length ? pipeData() : continueProcessAfterDataLoading();
}
});
let intEnd = self._dataPool.length - (self._dataPool.length - self._pipeWidth - intProcessedDataUnits);
let message = new MessageToDataLoader(self._config, self._dataPool.slice(intProcessedDataUnits, intEnd));
loaderProcess.send(message);
}
/**
* Continues migration process after data loading.
*
* @returns {undefined}
*/
function continueProcessAfterDataLoading() {
if (self._migrateOnlyData) {
dataPoolManager.dropDataPoolTable(self).then(() => {
return runVacuumFullAndAnalyze(self);
}).then(() => {
return migrationStateManager.dropStateLogsTable(self);
}).then(() => {
return cleanup(self);
}).then(
() => generateReport(self, 'NMIG migration is accomplished.')
);
} else {
migrationStateManager.get(self, 'per_table_constraints_loaded').then(isTableConstraintsLoaded => {
let promises = [];
if (!isTableConstraintsLoaded) {
for (let i = 0; i < self._tablesToMigrate.length; ++i) {
let tableName = self._tablesToMigrate[i];
promises.push(
processEnum(self, tableName).then(() => {
return processNull(self, tableName);
}).then(() => {
return processDefault(self, tableName);
}).then(() => {
return createSequence(self, tableName);
}).then(() => {
return processIndexAndKey(self, tableName);
}).then(() => {
return processComments(self, tableName);
})
);
}
}
Promise.all(promises).then(() => {
migrationStateManager.set(self, 'per_table_constraints_loaded').then(() => {
return processForeignKey(self);
}).then(() => {
return migrationStateManager.set(self, 'foreign_keys_loaded');
}).then(() => {
return dataPoolManager.dropDataPoolTable(self);
}).then(() => {
return processViews(self);
}).then(() => {
return migrationStateManager.set(self, 'views_loaded');
}).then(() => {
return runVacuumFullAndAnalyze(self);
}).then(() => {
return migrationStateManager.dropStateLogsTable(self);
}).then(() => {
return cleanup(self);
}).then(
() => generateReport(self, 'NMIG migration is accomplished.')
);
});
});
}
}
/**
* Runs migration according to user's configuration.
*
* @param {Object} config
* @returns {undefined}
*/
module.exports = function(config) {
console.log('\n\tNMIG - the database migration tool\n\tCopyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>\n\t Boot...');
self = new Conversion(config);
readDataTypesMap(self).then(
() => {
return directoriesManager.createLogsDirectory(self);
},
() => {
// Braces are essential. Without them promises-chain will continue execution.
console.log('\t--[Main] Failed to boot migration');
}
).then(
() => {
return directoriesManager.createTemporaryDirectory(self);
},
() => {
// Braces are essential. Without them promises-chain will continue execution.
log(self, '\t--[Main] Logs directory was not created...');
}
).then(
() => {
return createSchema(self);
},
() => {
let msg = '\t--[Main] The temporary directory [' + self._tempDirPath + '] already exists...'
+ '\n\t Please, remove this directory and rerun NMIG...';
log(self, msg);
}
).then(
() => {
return migrationStateManager.createStateLogsTable(self);
},
() => {
generateError(self, '\t--[Main] Cannot create new DB schema...');
return cleanup(self);
}
).then(
() => {
return dataPoolManager.createDataPoolTable(self);
},
() => {
generateError(self, '\t--[Main] Cannot create execution_logs table...');
return cleanup(self);
}
).then(
() => {
return loadStructureToMigrate(self);
},
() => {
generateError(self, '\t--[Main] Cannot create data-pool...');
return cleanup(self);
}
).then(
() => {
return dataPoolManager.readDataPool(self);
},
() => {
generateError(self, '\t--[Main] NMIG cannot load source database structure...');
return cleanup(self);
}
).then(
pipeData,
() => {
generateError(self, '\t--[Main] NMIG failed to load Data-Units pool...');
return cleanup(self);
}
);
};

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/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
/**
* Representation of a message of the master process to DataLoader process.
* Contents migration's configuration and an array of "data-chunks".
* Constructor.
*
* @param {Object} config
* @param {Array} chunks
*/
module.exports = function MessageToDataLoader(config, chunks) {
this.config = config;
this.chunks = chunks;
};

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/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
/**
* Representation of a message of DataLoader process to the master process regarding records,
* inserted to specified table.
* Constructor.
*
* @param {String} tableName
* @param {Number} rowsInserted
* @param {Number} totalRowsToInsert
*/
module.exports = function MessageToMaster(tableName, rowsInserted, totalRowsToInsert) {
this.tableName = tableName;
this.rowsInserted = rowsInserted;
this.totalRowsToInsert = totalRowsToInsert;
};

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/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const connect = require('./Connector');
const log = require('./Logger');
const generateError = require('./ErrorGenerator');
/**
* Get state-log.
*
* @param {Conversion} self
* @param {String} param
* @returns {Promise}
*/
module.exports.get = function(self, param) {
return connect(self).then(() => {
return new Promise(resolve => {
self._pg.connect((error, client, done) => {
if (error) {
generateError(self, '\t--[MigrationStateManager.get] Cannot connect to PostgreSQL server...\n' + error);
resolve(false);
} else {
let sql = 'SELECT ' + param + ' FROM "' + self._schema + '"."state_logs_' + self._schema + self._mySqlDbName + '";';
client.query(sql, (err, data) => {
done();
if (err) {
generateError(self, '\t--[MigrationStateManager.get] ' + err, sql);
resolve(false);
} else {
resolve(data.rows[0][param]);
}
});
}
});
});
});
};
/**
* Update the state-log.
*
* @param {Conversion} self
* @param {String} param
* @returns {Promise}
*/
module.exports.set = function(self, param) {
return connect(self).then(() => {
return new Promise(resolve => {
self._pg.connect((error, client, done) => {
if (error) {
generateError(self, '\t--[MigrationStateManager.set] Cannot connect to PostgreSQL server...\n' + error);
resolve();
} else {
let sql = 'UPDATE "' + self._schema + '"."state_logs_'
+ self._schema + self._mySqlDbName + '" SET ' + param + ' = TRUE;';
client.query(sql, err => {
done();
if (err) {
generateError(self, '\t--[MigrationStateManager.set] ' + err, sql);
}
resolve();
});
}
});
});
});
};
/**
* Create the "{schema}"."state_logs_{self._schema + self._mySqlDbName} temporary table."
*
* @param {Conversion} self
* @returns {Promise}
*/
module.exports.createStateLogsTable = function(self) {
return connect(self).then(() => {
return new Promise((resolve, reject) => {
self._pg.connect((error, client, done) => {
if (error) {
generateError(self, '\t--[createStateLogsTable] Cannot connect to PostgreSQL server...\n' + error);
reject();
} else {
let sql = 'CREATE TABLE IF NOT EXISTS "' + self._schema + '"."state_logs_' + self._schema + self._mySqlDbName
+ '"('
+ '"tables_loaded" BOOLEAN,'
+ '"per_table_constraints_loaded" BOOLEAN,'
+ '"foreign_keys_loaded" BOOLEAN,'
+ '"views_loaded" BOOLEAN'
+ ');';
client.query(sql, err => {
if (err) {
done();
generateError(self, '\t--[createStateLogsTable] ' + err, sql);
reject();
} else {
sql = 'SELECT COUNT(1) AS cnt FROM "' + self._schema + '"."state_logs_' + self._schema + self._mySqlDbName + '";';
client.query(sql, (errorCount, result) => {
if (errorCount) {
done();
generateError(self, '\t--[createStateLogsTable] ' + errorCount, sql);
reject();
} else if (+result.rows[0].cnt === 0) {
sql = 'INSERT INTO "' + self._schema + '"."state_logs_' + self._schema + self._mySqlDbName
+ '" VALUES(FALSE, FALSE, FALSE, FALSE);';
client.query(sql, errorInsert => {
done();
if (errorInsert) {
generateError(self, '\t--[createStateLogsTable] ' + errorInsert, sql);
reject();
} else {
let msg = '\t--[createStateLogsTable] table "' + self._schema + '"."state_logs_'
+ self._schema + self._mySqlDbName + '" is created...';
log(self, msg);
resolve();
}
});
} else {
let msg = '\t--[createStateLogsTable] table "' + self._schema + '"."state_logs_'
+ self._schema + self._mySqlDbName + '" is created...';
log(self, msg);
resolve();
}
});
}
});
}
});
});
});
};
/**
* Drop the "{schema}"."state_logs_{self._schema + self._mySqlDbName} temporary table."
*
* @param {Conversion} self
* @returns {Promise}
*/
module.exports.dropStateLogsTable = function(self) {
return connect(self).then(() => {
return new Promise(resolve => {
self._pg.connect((error, client, done) => {
if (error) {
generateError(self, '\t--[dropStateLogsTable] Cannot connect to PostgreSQL server...\n' + error);
resolve();
} else {
let sql = 'DROP TABLE "' + self._schema + '"."state_logs_' + self._schema + self._mySqlDbName + '";';
client.query(sql, err => {
done();
if (err) {
generateError(self, '\t--[dropStateLogsTable] ' + err, sql);
} else {
log(self, '\t--[dropStateLogsTable] table "' + self._schema + '"."state_logs_' + self._schema + self._mySqlDbName + '" is dropped...');
}
resolve();
});
}
});
});
});
};

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/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const connect = require('./Connector');
const log = require('./Logger');
const generateError = require('./ErrorGenerator');
/**
* Define which columns of the given table can contain the "NULL" value.
* Set an appropriate constraint, if need.
*
* @param {Conversion} self
* @param {String} tableName
* @returns {Promise}
*/
module.exports = function(self, tableName) {
return connect(self).then(() => {
return new Promise(resolve => {
log(self, '\t--[processNull] Defines "NOT NULLs" for table: "' + self._schema + '"."' + tableName + '"', self._dicTables[tableName].tableLogPath);
let processNullPromises = [];
for (let i = 0; i < self._dicTables[tableName].arrTableColumns.length; ++i) {
if (self._dicTables[tableName].arrTableColumns[i].Null.toLowerCase() === 'no') {
processNullPromises.push(
new Promise(resolveProcessNull => {
self._pg.connect((error, client, done) => {
if (error) {
let msg = '\t--[processNull] Cannot connect to PostgreSQL server...\n' + error;
generateError(self, msg);
resolveProcessNull();
} else {
let sql = 'ALTER TABLE "' + self._schema + '"."' + tableName
+ '" ALTER COLUMN "' + self._dicTables[tableName].arrTableColumns[i].Field + '" SET NOT NULL;';
client.query(sql, err => {
done();
if (err) {
let msg = '\t--[processNull] Error while setting NOT NULL for "' + self._schema + '"."'
+ tableName + '"."' + self._dicTables[tableName].arrTableColumns[i].Field + '"...\n' + err;
generateError(self, msg, sql);
resolveProcessNull();
} else {
let success = '\t--[processNull] Set NOT NULL for "' + self._schema + '"."' + tableName
+ '"."' + self._dicTables[tableName].arrTableColumns[i].Field + '"...';
log(self, success, self._dicTables[tableName].tableLogPath);
resolveProcessNull();
}
});
}
});
})
);
}
}
Promise.all(processNullPromises).then(() => resolve());
});
});
};

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/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const log = require('./Logger');
/**
* Generates a summary report.
*
* @param {Conversion} self
* @param {String} endMsg
* @returns {undefined}
*/
module.exports = function(self, endMsg) {
let differenceSec = ((new Date()) - self._timeBegin) / 1000;
let seconds = Math.floor(differenceSec % 60);
differenceSec = differenceSec / 60;
let minutes = Math.floor(differenceSec % 60);
let hours = Math.floor(differenceSec / 60);
hours = hours < 10 ? '0' + hours : hours;
minutes = minutes < 10 ? '0' + minutes : minutes;
seconds = seconds < 10 ? '0' + seconds : seconds;
let output = '\t--[generateReport] ' + endMsg
+ '\n\t--[generateReport] Total time: ' + hours + ':' + minutes + ':' + seconds
+ '\n\t--[generateReport] (hours:minutes:seconds)';
log(self, output);
process.exit();
};

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/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const connect = require('./Connector');
const generateError = require('./ErrorGenerator');
/**
* Create a new database schema.
* Insure a uniqueness of a new schema name.
*
* @param {Conversion} self
* @returns {Promise}
*/
module.exports = function(self) {
return connect(self).then(() => {
return new Promise((resolve, reject) => {
self._pg.connect((error, client, done) => {
if (error) {
generateError(self, '\t--[createSchema] Cannot connect to PostgreSQL server...\n' + error);
reject();
} else {
let sql = "SELECT schema_name FROM information_schema.schemata WHERE schema_name = '" + self._schema + "';";
client.query(sql, (err, result) => {
if (err) {
done();
generateError(self, '\t--[createSchema] ' + err, sql);
reject();
} else if (result.rows.length === 0) {
sql = 'CREATE SCHEMA "' + self._schema + '";';
client.query(sql, err => {
done();
if (err) {
generateError(self, '\t--[createSchema] ' + err, sql);
reject();
} else {
resolve();
}
});
} else {
resolve();
}
});
}
});
});
});
};

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/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const connect = require('./Connector');
const log = require('./Logger');
const generateError = require('./ErrorGenerator');
/**
* Define which column in given table has the "auto_increment" attribute.
* Create an appropriate sequence.
*
* @param {Conversion} self
* @param {String} tableName
* @returns {Promise}
*/
module.exports = function(self, tableName) {
return connect(self).then(() => {
return new Promise(resolve => {
let createSequencePromises = [];
for (let i = 0; i < self._dicTables[tableName].arrTableColumns.length; ++i) {
if (self._dicTables[tableName].arrTableColumns[i].Extra === 'auto_increment') {
createSequencePromises.push(
new Promise(resolveCreateSequence => {
let seqName = tableName + '_' + self._dicTables[tableName].arrTableColumns[i].Field + '_seq';
log(self, '\t--[createSequence] Trying to create sequence : "' + self._schema + '"."' + seqName + '"', self._dicTables[tableName].tableLogPath);
self._pg.connect((error, client, done) => {
if (error) {
let msg = '\t--[createSequence] Cannot connect to PostgreSQL server...\n' + error;
generateError(self, msg);
resolveCreateSequence();
} else {
let sql = 'CREATE SEQUENCE "' + self._schema + '"."' + seqName + '";';
client.query(sql, err => {
if (err) {
done();
let errMsg = '\t--[createSequence] Failed to create sequence "' + self._schema + '"."' + seqName + '"';
generateError(self, errMsg, sql);
resolveCreateSequence();
} else {
sql = 'ALTER TABLE "' + self._schema + '"."' + tableName + '" '
+ 'ALTER COLUMN "' + self._dicTables[tableName].arrTableColumns[i].Field + '" '
+ 'SET DEFAULT NEXTVAL(\'"' + self._schema + '"."' + seqName + '"\');';
client.query(sql, err2 => {
if (err2) {
done();
let err2Msg = '\t--[createSequence] Failed to set default value for "' + self._schema + '"."'
+ tableName + '"."' + self._dicTables[tableName].arrTableColumns[i].Field + '"...'
+ '\n\t--[createSequence] Note: sequence "' + self._schema + '"."' + seqName + '" was created...';
generateError(self, err2Msg, sql);
resolveCreateSequence();
} else {
sql = 'ALTER SEQUENCE "' + self._schema + '"."' + seqName + '" '
+ 'OWNED BY "' + self._schema + '"."' + tableName
+ '"."' + self._dicTables[tableName].arrTableColumns[i].Field + '";';
client.query(sql, err3 => {
if (err3) {
done();
let err3Msg = '\t--[createSequence] Failed to relate sequence "' + self._schema + '"."' + seqName + '" to '
+ '"' + self._schema + '"."'
+ tableName + '"."' + self._dicTables[tableName].arrTableColumns[i].Field + '"...';
generateError(self, err3Msg, sql);
resolveCreateSequence();
} else {
sql = 'SELECT SETVAL(\'"' + self._schema + '"."' + seqName + '"\', '
+ '(SELECT MAX("' + self._dicTables[tableName].arrTableColumns[i].Field + '") FROM "'
+ self._schema + '"."' + tableName + '"));';
client.query(sql, err4 => {
done();
if (err4) {
let err4Msg = '\t--[createSequence] Failed to set max-value of "' + self._schema + '"."'
+ tableName + '"."' + self._dicTables[tableName].arrTableColumns[i].Field + '" '
+ 'as the "NEXTVAL of "' + self._schema + '"."' + seqName + '"...';
generateError(self, err4Msg, sql);
resolveCreateSequence();
} else {
let success = '\t--[createSequence] Sequence "' + self._schema + '"."' + seqName + '" is created...';
log(self, success, self._dicTables[tableName].tableLogPath);
resolveCreateSequence();
}
});
}
});
}
});
}
});
}
});
})
);
}
}
Promise.all(createSequencePromises).then(() => resolve());
});
});
};

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/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const Table = require('./Table');
const createTable = require('./TableProcessor');
const connect = require('./Connector');
const log = require('./Logger');
const generateError = require('./ErrorGenerator');
const prepareDataChunks = require('./DataChunksProcessor');
const migrationStateManager = require('./MigrationStateManager');
/**
* Processes current table before data loading.
*
* @param {Conversion} self
* @param {String} tableName
* @param {Boolean} stateLog
* @returns {Promise}
*/
function processTableBeforeDataLoading(self, tableName, stateLog) {
return connect(self).then(() => {
return createTable(self, tableName);
}).then(() => {
return prepareDataChunks(self, tableName, stateLog);
}).catch(() => {
generateError(self, '\t--[processTableBeforeDataLoading] Cannot create table "' + self._schema + '"."' + tableName + '"...');
});
}
/**
* Load source tables and views, that need to be migrated.
*
* @param {Conversion} self
* @returns {Promise}
*/
module.exports = function(self) {
return migrationStateManager.get(self, 'tables_loaded').then(haveTablesLoaded => {
return new Promise((resolve, reject) => {
self._mysql.getConnection((error, connection) => {
if (error) {
// The connection is undefined.
generateError(self, '\t--[loadStructureToMigrate] Cannot connect to MySQL server...\n' + error);
reject();
} else {
let sql = 'SHOW FULL TABLES IN `' + self._mySqlDbName + '`;';
connection.query(sql, (strErr, rows) => {
connection.release();
if (strErr) {
generateError(self, '\t--[loadStructureToMigrate] ' + strErr, sql);
reject();
} else {
let tablesCnt = 0;
let viewsCnt = 0;
let processTablePromises = [];
for (let i = 0; i < rows.length; ++i) {
let relationName = rows[i]['Tables_in_' + self._mySqlDbName];
if (rows[i].Table_type === 'BASE TABLE' && self._excludeTables.indexOf(relationName) === -1) {
self._tablesToMigrate.push(relationName);
self._dicTables[relationName] = new Table(self._logsDirPath + '/' + relationName + '.log');
processTablePromises.push(processTableBeforeDataLoading(self, relationName, haveTablesLoaded));
tablesCnt++;
} else if (rows[i].Table_type === 'VIEW') {
self._viewsToMigrate.push(relationName);
viewsCnt++;
}
}
rows = null;
self._tablesCnt = tablesCnt;
self._viewsCnt = viewsCnt;
let message = '\t--[loadStructureToMigrate] Source DB structure is loaded...\n'
+ '\t--[loadStructureToMigrate] Tables to migrate: ' + tablesCnt + '\n'
+ '\t--[loadStructureToMigrate] Views to migrate: ' + viewsCnt;
log(self, message);
Promise.all(processTablePromises).then(
() => {
migrationStateManager.set(self, 'tables_loaded').then(() => resolve());
},
() => reject()
);
}
});
}
});
});
});
};

147
migration/fmtp/TableProcessor.js Normal file
View file

@ -0,0 +1,147 @@
/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const connect = require('./Connector');
const log = require('./Logger');
const generateError = require('./ErrorGenerator');
/**
* Converts MySQL data types to corresponding PostgreSQL data types.
* This conversion performs in accordance to mapping rules in './DataTypesMap.json'.
* './DataTypesMap.json' can be customized.
*
* @param {Object} objDataTypesMap
* @param {String} mySqlDataType
* @returns {String}
*/
function mapDataTypes(objDataTypesMap, mySqlDataType) {
let retVal = '';
let arrDataTypeDetails = mySqlDataType.split(' ');
mySqlDataType = arrDataTypeDetails[0].toLowerCase();
let increaseOriginalSize = arrDataTypeDetails.indexOf('unsigned') !== -1 || arrDataTypeDetails.indexOf('zerofill') !== -1;
arrDataTypeDetails = null;
if (mySqlDataType.indexOf('(') === -1) {
// No parentheses detected.
retVal = increaseOriginalSize ? objDataTypesMap[mySqlDataType].increased_size : objDataTypesMap[mySqlDataType].type;
} else {
// Parentheses detected.
let arrDataType = mySqlDataType.split('(');
let strDataType = arrDataType[0].toLowerCase();
let strDataTypeDisplayWidth = arrDataType[1];
arrDataType = null;
if ('enum' === strDataType || 'set' === strDataType) {
retVal = 'character varying(255)';
} else if ('decimal' === strDataType || 'numeric' === strDataType) {
retVal = objDataTypesMap[strDataType].type + '(' + strDataTypeDisplayWidth;
} else if ('decimal(19,2)' === mySqlDataType || objDataTypesMap[strDataType].mySqlVarLenPgSqlFixedLen) {
// Should be converted without a length definition.
retVal = increaseOriginalSize
? objDataTypesMap[strDataType].increased_size
: objDataTypesMap[strDataType].type;
} else {
// Should be converted with a length definition.
retVal = increaseOriginalSize
? objDataTypesMap[strDataType].increased_size + '(' + strDataTypeDisplayWidth
: objDataTypesMap[strDataType].type + '(' + strDataTypeDisplayWidth;
}
}
// Prevent incompatible length (CHARACTER(0) or CHARACTER VARYING(0)).
if (retVal === 'character(0)') {
retVal = 'character(1)';
} else if (retVal === 'character varying(0)') {
retVal = 'character varying(1)';
}
return retVal;
}
/**
* Migrates structure of a single table to PostgreSql server.
*
* @param {Conversion} self
* @param {String} tableName
* @returns {Promise}
*/
module.exports = function(self, tableName) {
return connect(self).then(() => {
return new Promise((resolveCreateTable, rejectCreateTable) => {
log(self, '\t--[createTable] Currently creating table: `' + tableName + '`', self._dicTables[tableName].tableLogPath);
self._mysql.getConnection((error, connection) => {
if (error) {
// The connection is undefined.
generateError(self, '\t--[createTable] Cannot connect to MySQL server...\n' + error);
rejectCreateTable();
} else {
let sql = 'SHOW FULL COLUMNS FROM `' + tableName + '`;';
connection.query(sql, (err, rows) => {
connection.release();
if (err) {
generateError(self, '\t--[createTable] ' + err, sql);
rejectCreateTable();
} else {
self._dicTables[tableName].arrTableColumns = rows;
if (self._migrateOnlyData) {
return resolveCreateTable();
}
self._pg.connect((error, client, done) => {
if (error) {
generateError(self, '\t--[createTable] Cannot connect to PostgreSQL server...\n' + error, sql);
rejectCreateTable();
} else {
sql = 'CREATE TABLE IF NOT EXISTS "' + self._schema + '"."' + tableName + '"(';
for (let i = 0; i < rows.length; ++i) {
let strConvertedType = mapDataTypes(self._dataTypesMap, rows[i].Type);
sql += '"' + rows[i].Field + '" ' + strConvertedType + ',';
}
rows = null;
sql = sql.slice(0, -1) + ');';
client.query(sql, err => {
done();
if (err) {
generateError(self, '\t--[createTable] ' + err, sql);
rejectCreateTable();
} else {
log(self,
'\t--[createTable] Table "' + self._schema + '"."' + tableName + '" is created...',
self._dicTables[tableName].tableLogPath
);
resolveCreateTable();
}
});
}
});
}
});
}
});
});
});
};

74
migration/fmtp/VacuumProcessor.js Normal file
View file

@ -0,0 +1,74 @@
/*
* This file is a part of "NMIG" - the database migration tool.
*
* Copyright 2016 Anatoly Khaytovich <anatolyuss@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (please see the "LICENSE.md" file).
* If not, see <http://www.gnu.org/licenses/gpl.txt>.
*
* @author Anatoly Khaytovich <anatolyuss@gmail.com>
*/
'use strict';
const connect = require('./Connector');
const log = require('./Logger');
const generateError = require('./ErrorGenerator');
/**
* Runs "vacuum full" and "analyze".
*
* @param {Conversion} self
* @returns {Promise}
*/
module.exports = function(self) {
return connect(self).then(() => {
return new Promise(resolve => {
let vacuumPromises = [];
for (let i = 0; i < self._tablesToMigrate.length; ++i) {
if (self._noVacuum.indexOf(self._tablesToMigrate[i]) === -1) {
let msg = '\t--[runVacuumFullAndAnalyze] Running "VACUUM FULL and ANALYZE" query for table "'
+ self._schema + '"."' + self._tablesToMigrate[i] + '"...';
log(self, msg);
vacuumPromises.push(
new Promise(resolveVacuum => {
self._pg.connect((error, client, done) => {
if (error) {
generateError(self, '\t--[runVacuumFullAndAnalyze] Cannot connect to PostgreSQL server...');
resolveVacuum();
} else {
let sql = 'VACUUM (FULL, ANALYZE) "' + self._schema + '"."' + self._tablesToMigrate[i] + '";';
client.query(sql, err => {
done();
if (err) {
generateError(self, '\t--[runVacuumFullAndAnalyze] ' + err, sql);
resolveVacuum();
} else {
let msg2 = '\t--[runVacuumFullAndAnalyze] Table "' + self._schema + '"."' + self._tablesToMigrate[i] + '" is VACUUMed...';
log(self, msg2);
resolveVacuum();
}
});
}
});
})
);
}
}
Promise.all(vacuumPromises).then(() => resolve());
});
});
};

122
migration/fmtp/ViewGenerator.js
View file

@ -20,6 +20,11 @@
*/
'use strict';
const fs = require('fs');
const log = require('./Logger');
const generateError = require('./ErrorGenerator');
const migrationStateManager = require('./MigrationStateManager');
/**
* Attempts to convert MySQL view to PostgreSQL view.
*
@ -28,12 +33,12 @@
* @param {String} mysqlViewCode
* @returns {String}
*/
module.exports = function(schema, viewName, mysqlViewCode) {
function generateView(schema, viewName, mysqlViewCode) {
mysqlViewCode = mysqlViewCode.split('`').join('"');
let queryStart = mysqlViewCode.indexOf('AS');
mysqlViewCode = mysqlViewCode.slice(queryStart);
let arrMysqlViewCode = mysqlViewCode.split(' ');
for (let i = 0; i < arrMysqlViewCode.length; ++i) {
if (
arrMysqlViewCode[i].toLowerCase() === 'from'
@ -45,4 +50,117 @@ module.exports = function(schema, viewName, mysqlViewCode) {
}
return 'CREATE OR REPLACE VIEW "' + schema + '"."' + viewName + '" ' + arrMysqlViewCode.join(' ') + ';';
}
/**
* Writes a log, containing a view code.
*
* @param {Conversion} self
* @param {String} viewName
* @param {String} sql
* @returns {undefined}
*/
function logNotCreatedView(self, viewName, sql) {
fs.stat(self._notCreatedViewsPath, (directoryDoesNotExist, stat) => {
if (directoryDoesNotExist) {
fs.mkdir(self._notCreatedViewsPath, self._0777, e => {
if (e) {
log(self, '\t--[logNotCreatedView] ' + e);
} else {
log(self, '\t--[logNotCreatedView] "not_created_views" directory is created...');
// "not_created_views" directory is created. Can write the log...
fs.open(self._notCreatedViewsPath + '/' + viewName + '.sql', 'w', self._0777, (error, fd) => {
if (error) {
log(self, error);
} else {
let buffer = new Buffer(sql, self._encoding);
fs.write(fd, buffer, 0, buffer.length, null, () => {
buffer = null;
fs.close(fd);
});
}
});
}
});
} else if (!stat.isDirectory()) {
log(self, '\t--[logNotCreatedView] Cannot write the log due to unexpected error');
} else {
// "not_created_views" directory already exists. Can write the log...
fs.open(self._notCreatedViewsPath + '/' + viewName + '.sql', 'w', self._0777, (error, fd) => {
if (error) {
log(self, error);
} else {
let buffer = new Buffer(sql, self._encoding);
fs.write(fd, buffer, 0, buffer.length, null, () => {
buffer = null;
fs.close(fd);
});
}
});
}
});
}
/**
* Attempts to convert MySQL view to PostgreSQL view.
*
* @param {Conversion} self
* @returns {Promise}
*/
module.exports = function(self) {
return migrationStateManager.get(self, 'views_loaded').then(isViewsLoaded => {
return new Promise(resolve => {
let createViewPromises = [];
if (!isViewsLoaded) {
for (let i = 0; i < self._viewsToMigrate.length; ++i) {
createViewPromises.push(
new Promise(resolveProcessView2 => {
self._mysql.getConnection((error, connection) => {
if (error) {
// The connection is undefined.
generateError(self, '\t--[processView] Cannot connect to MySQL server...\n' + error);
resolveProcessView2();
} else {
let sql = 'SHOW CREATE VIEW `' + self._viewsToMigrate[i] + '`;';
connection.query(sql, (strErr, rows) => {
connection.release();
if (strErr) {
generateError(self, '\t--[processView] ' + strErr, sql);
resolveProcessView2();
} else {
self._pg.connect((error, client, done) => {
if (error) {
generateError(self, '\t--[processView] Cannot connect to PostgreSQL server...');
resolveProcessView2();
} else {
sql = generateView(self._schema, self._viewsToMigrate[i], rows[0]['Create View']);
rows = null;
client.query(sql, err => {
done();
if (err) {
generateError(self, '\t--[processView] ' + err, sql);
logNotCreatedView(self, self._viewsToMigrate[i], sql);
resolveProcessView2();
} else {
log(self, '\t--[processView] View "' + self._schema + '"."' + self._viewsToMigrate[i] + '" is created...');
resolveProcessView2();
}
});
}
});
}
});
}
});
})
);
}
}
Promise.all(createViewPromises).then(() => resolve());
});
});
};

4
nmig.js
View file

@ -21,7 +21,7 @@
'use strict';
const fs = require('fs');
const fmtp = require('./migration/fmtp/FromMySQL2PostgreSQL');
const main = require('./migration/fmtp/Main');
fs.readFile(__dirname + '/config.json', (error, data) => {
if (error) {
@ -31,7 +31,7 @@ fs.readFile(__dirname + '/config.json', (error, data) => {
let config = JSON.parse(data.toString());
config.tempDirPath = __dirname + '/temporary_directory';
config.logsDirPath = __dirname + '/logs_directory';
fmtp(config);
main(config);
} catch (err) {
console.log('\n\t--Cannot parse JSON from' + __dirname + '/config.json');
}

5
package.json
View file

@ -1,10 +1,11 @@
{
"name": "nmig",
"version": "1.1.1",
"version": "2.2.0",
"description": "The database migration app",
"author": "Anatoly Khaytovich<anatolyuss@gmail.com>",
"dependencies": {
"mysql": "*",
"pg": "*"
"pg": "*",
"pg-copy-streams": "*"
}
}