1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857
|
'\" t
.\" Title: \fBmysqldbcompare\fR
.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\" Date: 08/30/2013
.\" Manual: MySQL Utilities
.\" Source: MySQL 1.3.4
.\" Language: English
.\"
.TH "\FBMYSQLDBCOMPARE\FR" "1" "08/30/2013" "MySQL 1\&.3\&.4" "MySQL Utilities"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.\" mysqldbcompare
.\" utilities: mysqldbcompare
.\" scripts
.SH "NAME"
mysqldbcompare \- Compare Two Databases and Identify Differences
.SH "SYNOPSIS"
.HP \w'\fBmysqldbcompare\ [\fR\fB\fIoptions\fR\fR\fB]\ \fR\fB\fIdb1\fR\fR\fB\ [\fR\fB\fI:db2\fR\fR\fB]\ \&.\&.\&.\fR\ 'u
\fBmysqldbcompare [\fR\fB\fIoptions\fR\fR\fB] \fR\fB\fIdb1\fR\fR\fB [\fR\fB\fI:db2\fR\fR\fB] \&.\&.\&.\fR
.SH "DESCRIPTION"
.PP
This utility compares the objects and data from two databases to find differences\&. It identifies objects having different definitions in the two databases and presents them in a diff\-style format of choice\&. Differences in the data are shown using a similar diff\-style format\&. Changed or missing rows are shown in a standard format of GRID, CSV, TAB, or VERTICAL\&.
.PP
Use the notation db1:db2 to name two databases to compare, or, alternatively just db1 to compare two databases with the same name\&. The latter case is a convenience notation for comparing same\-named databases on different servers\&.
.PP
The comparison may be run against two databases of different names on a single server by specifying only the
\fB\-\-server1\fR
option\&. The user can also connect to another server by specifying the
\fB\-\-server2\fR
option\&. In this case, db1 is taken from server1 and db2 from server2\&.
.PP
Those objects considered in the database include tables, views, triggers, procedures, functions, and events\&. A count for each object type can be shown with the
\fB\-vv\fR
option\&.
.PP
The check is performed using a series of steps called tests\&. By default, the utility stops on the first failed test, but you can specify the
\fB\-\-run\-all\-tests\fR
option to cause the utility to run all tests regardless of their end state\&.
.PP
Note: Using
\fB\-\-run\-all\-tests\fR
may produce expected cascade failures\&. For example, if the row counts differ among two tables being compared, the data consistency will also fail\&.
.PP
The tests include the following:
.sp
.RS 4
.ie n \{\
\h'-04' 1.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 1." 4.2
.\}
Check database definitions
.sp
A database existence precondition check ensures that both databases exist\&. If they do not, no further processing is possible and the
\fB\-\-run\-all\-tests\fR
option is ignored\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 2.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 2." 4.2
.\}
Check existence of objects in both databases
.sp
The test for objects in both databases identifies those objects missing from one or another database\&. The remaining tests apply only to those objects that appear in both databases\&. To skip this test, use the
\fB\-\-skip\-object\-compare\fR
option\&. That can be useful when there are known missing objects among the databases\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 3.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 3." 4.2
.\}
Compare object definitions
.sp
The definitions (the
\fBCREATE\fR
statements) are compared and differences are presented\&. To skip this test, use the
\fB\-\-skip\-diff\fR
option\&. That can be useful when there are object name differences only that you want to ignore\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 4.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 4." 4.2
.\}
Check table row counts
.sp
This check ensures that both tables have the same number of rows\&. This does not ensure that the table data is consistent\&. It is merely a cursory check to indicate possible missing rows in one table or the other\&. The data consistency check identifies the missing rows\&. To skip this test, use the
\fB\-\-skip\-row\-count\fR
option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 5.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 5." 4.2
.\}
Check table data consistency
.sp
This check identifies both changed rows as well as missing rows from one or another of the tables in the databases\&. Changed rows are displayed as a diff\-style report with the format chosen (\fBGRID\fR
by default) and missing rows are also displayed using the format chosen\&. To skip this test, use the
\fB\-\-skip\-data\-check\fR
option\&.
.RE
.PP
You may want to use the
\-\-skip\-xxx
options to run only one of the tests\&. This might be helpful when working to bring two databases into synchronization, to avoid running all of the tests repeatedly during the process\&.
.PP
Each test completes with one of the following states:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fBpass\fR
.sp
The test succeeded\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fBFAIL\fR
.sp
The test failed\&. Errors are displayed following the test state line\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fBSKIP\fR
.sp
The test was skipped due to a missing prerequisite or a skip option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fBWARN\fR
.sp
The test encountered an unusual but not fatal error\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\fR
.sp
The test is not applicable to this object\&.
.RE
.PP
To specify how to display diff\-style output, use one of the following values with the
\fB\-\-difftype\fR
option:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fBunified\fR
(default)
.sp
Display unified format output\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fBcontext\fR
.sp
Display context format output\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fBdiffer\fR
.sp
Display differ\-style format output\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fBsql\fR
.sp
Display SQL transformation statement output\&.
.RE
.PP
To specify how to display output for changed or missing rows, use one of the following values with the
\fB\-\-format\fR
option:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fBgrid\fR
(default)
.sp
Display output in grid or table format like that of the
\fBmysql\fR
monitor\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fBcsv\fR
.sp
Display output in comma\-separated values format\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fBtab\fR
.sp
Display output in tab\-separated format\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fBvertical\fR
.sp
Display output in single\-column format like that of the
\eG
command for the
\fBmysql\fR
monitor\&.
.RE
.PP
The
\fB\-\-changes\-for\fR
option controls the direction of the difference (by specifying the object to be transformed) in either the difference report (default) or the transformation report (designated with the
\fB\-\-difftype=sql\fR
option)\&. Consider the following command:
.sp
.if n \{\
.RS 4
.\}
.nf
mysqldbcompare \-\-server1=root@host1 \-\-server2=root@host2 \-\-difftype=sql \e
db1:dbx
.fi
.if n \{\
.RE
.\}
.PP
The leftmost database (db1) exists on the server designated by the
\fB\-\-server1\fR
option (host1)\&. The rightmost database (dbx) exists on the server designated by the
\fB\-\-server2\fR
option (host2)\&.
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-changes\-for=server1\fR: Produce output that shows how to make the definitions of objects on
server1
like the definitions of the corresponding objects on
server2\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-changes\-for=server2\fR: Produce output that shows how to make the definitions of objects on
server2
like the definitions of the corresponding objects on
server1\&.
.RE
.PP
The default direction is
server1\&.
.PP
You must provide connection parameters (user, host, password, and so forth) for an account that has the appropriate privileges to access all objects in the operation\&.
.PP
If the utility is to be run on a server that has binary logging enabled, and you do not want the comparison steps logged, use the
\fB\-\-disable\-binary\-logging\fR
option\&.
OPTIONS
.PP
\fBmysqldbcompare\fR
accepts the following command\-line options:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\-\-help
.sp
Display a help message and exit\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\-\-changes\-for=<direction>
.sp
Specify the server to show transformations to match the other server\&. For example, to see the transformation for transforming object definitions on server1 to match the corresponding definitions on server2, use
\fB\-\-changes\-for=server1\fR\&. Permitted values are
\fBserver1\fR
and
\fBserver2\fR\&. The default is
\fBserver1\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\-\-difftype=<difftype>, \-d<difftype>
.sp
Specify the difference display format\&. Permitted format values are
\fBunified\fR,
\fBcontext\fR,
\fBdiffer\fR, and
\fBsql\fR\&. The default is
\fBunified\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\-\-disable\-binary\-logging
.sp
If binary logging is enabled, disable it during the operation to prevent comparison operations from being written to the binary log\&. Note: Disabling binary logging requires the
\fBSUPER\fR
privilege\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\-\-format=<format>, \-f<format>
.sp
Specify the display format for changed or missing rows\&. Permitted format values are
\fBgrid\fR,
\fBcsv\fR,
\fBtab\fR, and
\fBvertical\fR\&. The default is
\fBgrid\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\-\-quiet, \-q
.sp
Do not print anything\&. Return only an exit code of success or failure\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\-\-run\-all\-tests, \-a
.sp
Do not halt at the first difference found\&. Process all objects\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\-\-server1=<source>
.sp
Connection information for the first server in the format: <\fIuser\fR>[:<\fIpasswd\fR>]@<\fIhost\fR>[:<\fIport\fR>][:<\fIsocket\fR>] or <\fIlogin\-path\fR>[:<\fIport\fR>][:<\fIsocket\fR>]\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\-\-server2=<source>
.sp
Connection information for the second server in the format: <\fIuser\fR>[:<\fIpasswd\fR>]@<\fIhost\fR>[:<\fIport\fR>][:<\fIsocket\fR>] or <\fIlogin\-path\fR>[::<\fIport\fR>][::<\fIsocket\fR>]\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\-\-show\-reverse
.sp
Produce a transformation report containing the SQL statements to conform the object definitions specified in reverse\&. For example, if \-\-changes\-for is set to server1, also generate the transformation for server2\&. Note: The reverse changes are annotated and marked as comments\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\-\-skip\-data\-check
.sp
Skip the data consistency check\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\-\-skip\-diff
.sp
Skip the object definition difference check\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\-\-skip\-object\-compare
.sp
Skip the object comparison check\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\-\-skip\-row\-count
.sp
Skip the row count check\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\-\-span\-key\-size=<number of bytes to use for key>
.sp
Change the size of the key used for compare table contents\&. A higher value can help to get more accurate results comparing large databases, but may slow the algorithm\&.
.sp
Default value is 8\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\-\-verbose, \-v
.sp
Specify how much information to display\&. Use this option multiple times to increase the amount of information\&. For example,
\fB\-v\fR
= verbose,
\fB\-vv\fR
= more verbose,
\fB\-vvv\fR
= debug\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\-\-version
.sp
Display version information and exit\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\-\-width=<number>
.sp
Change the display width of the test report\&. The default is 75 characters\&.
.RE
NOTES
.PP
The login user must have the appropriate permissions to read all databases and tables listed\&.
.PP
For the
\fB\-\-difftype\fR
option, the permitted values are not case sensitive\&. In addition, values may be specified as any unambiguous prefix of a valid value\&. For example,
\fB\-\-difftype=d\fR
specifies the differ type\&. An error occurs if a prefix matches more than one valid value\&.
.PP
The path to the MySQL client tools should be included in the PATH environment variable in order to use the authentication mechanism with login\-paths\&. This will allow the utility to use the my_print_defaults tools which is required to read the login\-path values from the login configuration file (\&.mylogin\&.cnf)\&.
.PP
If any database identifier specified as an argument contains special characters or is a reserved word, then it must be appropriately quoted with backticks (\fB`\fR)\&. In turn, names quoted with backticks must also be quoted with single or double quotes depending on the operating system, i\&.e\&. (\fB"\fR) in Windows or (\fB\*(Aq\fR) in non\-Windows systems, in order for the utilities to read backtick quoted identifiers as a single argument\&. For example, to compare a database with the name
\fBweird`db\&.name\fR
with
\fBother:weird`db\&.name\fR, the database pair must be specified using the following syntax (in non\-Windows):
\fB\*(Aq`weird``db\&.name`:`other:weird``db\&.name`\*(Aq\fR\&.
EXAMPLES
.PP
Use the following command to compare the
emp1
and
emp2
databases on the local server, and run all tests even if earlier tests fail:
.sp
.if n \{\
.RS 4
.\}
.nf
$ mysqldbcompare \-\-server1=root@localhost emp1:emp2 \-\-run\-all\-tests
# server1 on localhost: \&.\&.\&. connected\&.
# Checking databases emp1 on server1 and emp2 on server2
WARNING: Objects in server2:emp2 but not in server1:emp1:
TRIGGER: trg
PROCEDURE: p1
TABLE: t1
VIEW: v1
Defn Row Data
Type Object Name Diff Count Check
\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-
FUNCTION f1 pass \- \-
TABLE departments pass pass FAIL
Data differences found among rows:
\-\-\- emp1\&.departments
+++ emp2\&.departments
@@ \-1,4 +1,4 @@
************************* 1\&. row *************************
dept_no: d002
\- dept_name: dunno
+ dept_name: Finance
1 rows\&.
Rows in emp1\&.departments not in emp2\&.departments
************************* 1\&. row *************************
dept_no: d008
dept_name: Research
1 rows\&.
Rows in emp2\&.departments not in emp1\&.departments
************************* 1\&. row *************************
dept_no: d100
dept_name: stupid
1 rows\&.
TABLE dept_manager pass pass pass
Database consistency check failed\&.
# \&.\&.\&.done
.fi
.if n \{\
.RE
.\}
.PP
Given: two databases with the same table layout\&. Data for each table contains:
.sp
.if n \{\
.RS 4
.\}
.nf
mysql> select * from db1\&.t1;
+\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+
| a | b |
+\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+
| 1 | Test 789 |
| 2 | Test 456 |
| 3 | Test 123 |
| 4 | New row \- db1 |
+\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+
4 rows in set (0\&.00 sec)
mysql> select * from db2\&.t1;
+\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+
| a | b |
+\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+
| 1 | Test 123 |
| 2 | Test 456 |
| 3 | Test 789 |
| 5 | New row \- db2 |
+\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+
4 rows in set (0\&.00 sec)
.fi
.if n \{\
.RE
.\}
.PP
To generate the SQL statements for data transformations to make
db1\&.t1
the same as
db2\&.t1, use the
\fB\-\-changes\-for=server1\fR
option\&. We must also include the
\fB\-a\fR
option to ensure that the data consistency test is run\&. The following command illustrates the options used and an excerpt from the results generated:
.sp
.if n \{\
.RS 4
.\}
.nf
$ mysqldbcompare \-\-server1=root:root@localhost \e
\-\-server2=root:root@localhost db1:db2 \-\-changes\-for=server1 \-a \e
\-\-difftype=sql
[\&.\&.\&.]
# Defn Row Data
# Type Object Name Diff Count
Check #
\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-
# TABLE t1 pass pass FAIL
# # Data transformations for direction = server1:
# Data differences found among rows: UPDATE db1\&.t1 SET b = \*(AqTest 123\*(Aq
WHERE a = \*(Aq1\*(Aq; UPDATE db1\&.t1 SET b = \*(AqTest 789\*(Aq WHERE a = \*(Aq3\*(Aq; DELETE
FROM db1\&.t1 WHERE a = \*(Aq4\*(Aq; INSERT INTO db1\&.t1 (a, b) VALUES(\*(Aq5\*(Aq, \*(AqNew
row \- db2\*(Aq);
# Database consistency check failed\&. # # \&.\&.\&.done
.fi
.if n \{\
.RE
.\}
.PP
Similarly, when the same command is run with
\fB\-\-changes\-for=server2\fR
and
\fB\-\-difftype=sql\fR, the following report is generated:
.sp
.if n \{\
.RS 4
.\}
.nf
$ mysqldbcompare \-\-server1=root:root@localhost \e
\-\-server2=root:root@localhost db1:db2 \-\-changes\-for=server2 \-a \e
\-\-difftype=sql
[\&.\&.\&.]
# Defn Row Data
# Type Object Name Diff Count
Check #
\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-
# TABLE t1 pass pass FAIL
# # Data transformations for direction = server2:
# Data differences found among rows: UPDATE db2\&.t1 SET b = \*(AqTest 789\*(Aq
WHERE a = \*(Aq1\*(Aq; UPDATE db2\&.t1 SET b = \*(AqTest 123\*(Aq WHERE a = \*(Aq3\*(Aq; DELETE
FROM db2\&.t1 WHERE a = \*(Aq5\*(Aq; INSERT INTO db2\&.t1 (a, b) VALUES(\*(Aq4\*(Aq, \*(AqNew
row \- db1\*(Aq);
.fi
.if n \{\
.RE
.\}
.PP
With the
\fB\-\-difftype=sql\fR
SQL generation option set,
\fB\-\-show\-reverse\fR
shows the object transformations in both directions\&. Here is an excerpt of the results:
.sp
.if n \{\
.RS 4
.\}
.nf
$ mysqldbcompare \-\-server1=root:root@localhost \e
\-\-server2=root:root@localhost db1:db2 \-\-changes\-for=server1 \e
\-\-show\-reverse \-a \-\-difftype=sql
[\&.\&.\&.]
# Defn Row Data
# Type Object Name Diff Count
Check #
\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-
# TABLE t1 pass pass FAIL
# # Data transformations for direction = server1:
# Data differences found among rows: UPDATE db1\&.t1 SET b = \*(AqTest 123\*(Aq
WHERE a = \*(Aq1\*(Aq; UPDATE db1\&.t1 SET b = \*(AqTest 789\*(Aq WHERE a = \*(Aq3\*(Aq; DELETE
FROM db1\&.t1 WHERE a = \*(Aq4\*(Aq; INSERT INTO db1\&.t1 (a, b) VALUES(\*(Aq5\*(Aq, \*(AqNew
row \- db2\*(Aq);
# Data transformations for direction = server2:
# Data differences found among rows: UPDATE db2\&.t1 SET b = \*(AqTest 789\*(Aq
WHERE a = \*(Aq1\*(Aq; UPDATE db2\&.t1 SET b = \*(AqTest 123\*(Aq WHERE a = \*(Aq3\*(Aq; DELETE
FROM db2\&.t1 WHERE a = \*(Aq5\*(Aq; INSERT INTO db2\&.t1 (a, b) VALUES(\*(Aq4\*(Aq, \*(AqNew
row \- db1\*(Aq);
# Database consistency check failed\&. # # \&.\&.\&.done
.fi
.if n \{\
.RE
.\}
.SH "COPYRIGHT"
.br
.SH "SEE ALSO"
For more information, please refer to the MySQL Utilities section
of the MySQL Workbench Reference Manual, which is available online
at http://dev.mysql.com/doc/workbench/en/.
.SH AUTHOR
Oracle Corporation (http://dev.mysql.com/).
|