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PT-144 Fixed Constraint name is too long

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This commit is contained in:
Carlos Salguero
2017-05-23 12:33:55 -03:00
parent 43b50f8a8c
commit 38702783a4
3 changed files with 105 additions and 0 deletions
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2
bin/pt-online-schema-change
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@@ -10215,6 +10215,8 @@ sub create_new_table {
);
my $constraint_pattern = qr((CONSTRAINT `__|CONSTRAINT `_|CONSTRAINT `));
$sql =~ s/$constraint_pattern/$search_dict{$1}/gm;
# Limit constraint name to 64 characters
$sql =~ s/CONSTRAINT `([^`]{1,64})[^`]*` (.*)/ CONSTRAINT `$1` $2/gm;
if ( $o->get('default-engine') ) {
$sql =~ s/\s+ENGINE=\S+//;

75
t/pt-online-schema-change/long_fk_constraints.t Normal file
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@@ -0,0 +1,75 @@
#!/usr/bin/env perl
BEGIN {
die "The PERCONA_TOOLKIT_BRANCH environment variable is not set.\n"
unless $ENV{PERCONA_TOOLKIT_BRANCH} && -d $ENV{PERCONA_TOOLKIT_BRANCH};
unshift @INC, "$ENV{PERCONA_TOOLKIT_BRANCH}/lib";
};
use strict;
use warnings FATAL => 'all';
use English qw(-no_match_vars);
use Test::More;
use Data::Dumper;
use PerconaTest;
use Sandbox;
require "$trunk/bin/pt-online-schema-change";
my $dp = new DSNParser(opts=>$dsn_opts);
my $sb = new Sandbox(basedir => '/tmp', DSNParser => $dp);
my $master_dbh = $sb->get_dbh_for('master');
if ( !$master_dbh ) {
plan skip_all => 'Cannot connect to sandbox master';
}
# The sandbox servers run with lock_wait_timeout=3 and it's not dynamic
# so we need to specify --set-vars innodb_lock_wait_timeout-3 else the
# tool will die.
my $master_dsn = 'h=127.1,P=12345,u=msandbox,p=msandbox';
my @args = (qw(--set-vars innodb_lock_wait_timeout=3 --alter-foreign-keys-method rebuild_constraints));
my $output;
my $exit_status;
my $sample = "t/pt-online-schema-change/samples/";
# ############################################################################
# https://bugs.launchpad.net/percona-toolkit/+bug/1215587
# Adding _ to constraints can create issues with constraint name length
# ############################################################################
$sb->load_file('master', "$sample/long_fk_constraints.sql");
# run once: we expect constraint names to be prefixed with one underscore
# if they havre't one, and to remove 2 if they have 2
($output, $exit_status) = full_output(
sub { pt_online_schema_change::main(@args,
"$master_dsn,D=bug1215587,t=Table1",
"--alter", "ENGINE=InnoDB",
qw(--execute)) },
);
warn $output;
my $constraints = $master_dbh->selectall_arrayref("SELECT TABLE_NAME, CONSTRAINT_NAME FROM information_schema.KEY_COLUMN_USAGE WHERE table_schema='bug1215587' and (TABLE_NAME='Table1' OR TABLE_NAME='Table2') and CONSTRAINT_NAME LIKE '%fkey%' ORDER BY TABLE_NAME, CONSTRAINT_NAME");
warn Data::Dumper::Dumper($constraints);
is_deeply(
$constraints,
[
[ 'Table1', '__fkey1a' ],
[ 'Table1', '__fkey_SALES_RECURRING_PROFILE_CUSTOMER_CUSTOMER_ENTITY_ENTITY_I' ],
[ 'Table2', '_fkey2a' ],
[ 'Table2', '__fkey2b' ]
],
"First run adds or removes underscore from constraint names, accordingly"
);
# #############################################################################
# Done.
# #############################################################################
$sb->wipe_clean($master_dbh);
ok($sb->ok(), "Sandbox servers") or BAIL_OUT(__FILE__ . " broke the sandbox");
done_testing;

28
t/pt-online-schema-change/samples/long_fk_constraints.sql Normal file
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@@ -0,0 +1,28 @@
/* ----- Create two test tables with FKs for scenario 1 and 2: ----- */
drop database if exists bug1215587;
CREATE DATABASE bug1215587;
USE bug1215587;
CREATE TABLE IF NOT EXISTS `Table1` (
`ID` int unsigned NOT NULL AUTO_INCREMENT,
`T2ID` smallint unsigned DEFAULT NULL,
PRIMARY KEY (`ID`),
KEY `tagIndex` (`T2ID`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `Table2` (
`ID` smallint unsigned NOT NULL AUTO_INCREMENT,
PRIMARY KEY (`ID`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
ALTER TABLE `Table1`
ADD CONSTRAINT `_fkey1a` FOREIGN KEY (`T2ID`) REFERENCES `Table2` (`ID`) ON DELETE NO ACTION;
ALTER TABLE `Table1`
ADD CONSTRAINT `_fkey_SALES_RECURRING_PROFILE_CUSTOMER_CUSTOMER_ENTITY_ENTITY_ID` FOREIGN KEY (`T2ID`) REFERENCES `Table2` (`ID`) ON DELETE NO ACTION;
ALTER TABLE `Table2`
ADD CONSTRAINT `fkey2a` FOREIGN KEY (`ID`) REFERENCES `Table1` (`T2ID`) ON DELETE NO ACTION;
ALTER TABLE `Table2`
ADD CONSTRAINT `_fkey2b` FOREIGN KEY (`ID`) REFERENCES `Table1` (`T2ID`) ON DELETE NO ACTION;