Drizzle

Drizzledump not preserving FOREIGN KEY information during migration from MySQL

  1. Series 7.0
  2. Bug #683940
Bug #683940 reported by Patrick Crews
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Drizzle
Fix Released
Medium
Andrew Hutchings
Drizzle 2010-12-06
7.0
Fix Released
Medium
Andrew Hutchings
Drizzle 2010-12-06

Bug Description

This MySQL table:
CREATE TABLE t2(a INT NOT NULL, b INT , PRIMARY KEY(a), KEY b_key (b),
CONSTRAINT fk_constraint_t2 FOREIGN KEY (b) REFERENCES t1(b)
ON DELETE SET NULL
ON UPDATE CASCADE) ENGINE=Innodb;

Ends up as this in Drizzle post-migration:
SHOW CREATE TABLE drizzledump_migrate_test.t2;
Table Create Table
t2 CREATE TABLE `t2` (
  `a` INT NOT NULL,
  `b` INT DEFAULT NULL,
  PRIMARY KEY (`a`),
  KEY `b_key` (`b`)
) ENGINE=InnoDB COLLATE = utf8_general_ci

To repeat:
./test-run --suite=mysql_migrate foreign_key
The .result file is incorrect at the moment.

Please check the README file in the drizzle/tests/mysql_migrate directory for setup instructions.

Related branches

lp://staging/~patrick-crews/drizzle/mysql-migrate-tests
Drizzle Developers: Pending requested
Diff: 4505 lines (+4052/-0)
90 files modified
tests/std_data/mysqlmigrate_basic.dat (+3/-0)
tests/std_data/mysqlmigrate_binary_type.dat (+14/-0)
tests/std_data/mysqlmigrate_bit_type.dat (+18/-0)
tests/std_data/mysqlmigrate_blob_type.dat (+41/-0)
tests/std_data/mysqlmigrate_char_type.dat (+14/-0)
tests/std_data/mysqlmigrate_comments.dat (+10/-0)
tests/std_data/mysqlmigrate_databases.dat (+10/-0)
tests/std_data/mysqlmigrate_date_type.dat (+14/-0)
tests/std_data/mysqlmigrate_datetime_type.dat (+14/-0)
tests/std_data/mysqlmigrate_decimal_type.dat (+18/-0)
tests/std_data/mysqlmigrate_double_type.dat (+14/-0)
tests/std_data/mysqlmigrate_engines.dat (+6/-0)
tests/std_data/mysqlmigrate_enum_type.dat (+15/-0)
tests/std_data/mysqlmigrate_float_type.dat (+21/-0)
tests/std_data/mysqlmigrate_foreign_key.dat (+4/-0)
tests/std_data/mysqlmigrate_indexes.dat (+3/-0)
tests/std_data/mysqlmigrate_integer_type.dat (+67/-0)
tests/std_data/mysqlmigrate_large_data.dat (+230/-0)
tests/std_data/mysqlmigrate_numeric_type.dat (+18/-0)
tests/std_data/mysqlmigrate_partitions.dat (+2/-0)
tests/std_data/mysqlmigrate_real_type.dat (+18/-0)
tests/std_data/mysqlmigrate_set_type.dat (+15/-0)
tests/std_data/mysqlmigrate_text_type.dat (+41/-0)
tests/std_data/mysqlmigrate_time_type.dat (+16/-0)
tests/std_data/mysqlmigrate_timestamp_type.dat (+12/-0)
tests/std_data/mysqlmigrate_varbinary_type.dat (+14/-0)
tests/std_data/mysqlmigrate_varchar_type.dat (+14/-0)
tests/std_data/mysqlmigrate_year_type.dat (+18/-0)
tests/suite/mysql_migrate/README (+7/-0)
tests/suite/mysql_migrate/include/drizzledump_migrate.inc (+45/-0)
tests/suite/mysql_migrate/include/mysql_cleanup.inc (+4/-0)
tests/suite/mysql_migrate/r/all_databases.result (+84/-0)
tests/suite/mysql_migrate/r/basic.result (+20/-0)
tests/suite/mysql_migrate/r/binary_type.result (+26/-0)
tests/suite/mysql_migrate/r/bit_type.result (+29/-0)
tests/suite/mysql_migrate/r/blob_type.result (+67/-0)
tests/suite/mysql_migrate/r/char_type.result (+25/-0)
tests/suite/mysql_migrate/r/comments.result (+33/-0)
tests/suite/mysql_migrate/r/databases.result (+70/-0)
tests/suite/mysql_migrate/r/date_type.result (+25/-0)
tests/suite/mysql_migrate/r/datetime_type.result (+25/-0)
tests/suite/mysql_migrate/r/decimal_type.result (+27/-0)
tests/suite/mysql_migrate/r/destination-database.result (+35/-0)
tests/suite/mysql_migrate/r/engines.result (+29/-0)
tests/suite/mysql_migrate/r/enum_type.result (+26/-0)
tests/suite/mysql_migrate/r/float_type.result (+30/-0)
tests/suite/mysql_migrate/r/foreign_key.result (+28/-0)
tests/suite/mysql_migrate/r/indexes.result (+29/-0)
tests/suite/mysql_migrate/r/integer_type.result (+103/-0)
tests/suite/mysql_migrate/r/large_data.result (+1601/-0)
tests/suite/mysql_migrate/r/numeric_type.result (+27/-0)
tests/suite/mysql_migrate/r/partitions.result (+21/-0)
tests/suite/mysql_migrate/r/real_type.result (+27/-0)
tests/suite/mysql_migrate/r/set_type.result (+27/-0)
tests/suite/mysql_migrate/r/text_type.result (+67/-0)
tests/suite/mysql_migrate/r/time_type.result (+27/-0)
tests/suite/mysql_migrate/r/timestamp_type.result (+23/-0)
tests/suite/mysql_migrate/r/varchar_type.result (+25/-0)
tests/suite/mysql_migrate/r/year_type.result (+30/-0)
tests/suite/mysql_migrate/t/all_databases.test (+90/-0)
tests/suite/mysql_migrate/t/basic.test (+16/-0)
tests/suite/mysql_migrate/t/binary_type.test (+16/-0)
tests/suite/mysql_migrate/t/bit_type.test (+16/-0)
tests/suite/mysql_migrate/t/blob_type.test (+31/-0)
tests/suite/mysql_migrate/t/char_type.test (+16/-0)
tests/suite/mysql_migrate/t/comments.test (+18/-0)
tests/suite/mysql_migrate/t/databases.test (+78/-0)
tests/suite/mysql_migrate/t/date_type.test (+16/-0)
tests/suite/mysql_migrate/t/datetime_type.test (+16/-0)
tests/suite/mysql_migrate/t/decimal_type.test (+16/-0)
tests/suite/mysql_migrate/t/destination-database.test (+56/-0)
tests/suite/mysql_migrate/t/double_type.test (+16/-0)
tests/suite/mysql_migrate/t/engines.test (+21/-0)
tests/suite/mysql_migrate/t/enum_type.test (+16/-0)
tests/suite/mysql_migrate/t/float_type.test (+16/-0)
tests/suite/mysql_migrate/t/foreign_key.test (+17/-0)
tests/suite/mysql_migrate/t/indexes.test (+17/-0)
tests/suite/mysql_migrate/t/integer_type.test (+36/-0)
tests/suite/mysql_migrate/t/large_data.test (+26/-0)
tests/suite/mysql_migrate/t/master.opt (+1/-0)
tests/suite/mysql_migrate/t/numeric_type.test (+16/-0)
tests/suite/mysql_migrate/t/partitions.test (+16/-0)
tests/suite/mysql_migrate/t/real_type.test (+16/-0)
tests/suite/mysql_migrate/t/set_type.test (+16/-0)
tests/suite/mysql_migrate/t/text_type.test (+31/-0)
tests/suite/mysql_migrate/t/time_type.test (+16/-0)
tests/suite/mysql_migrate/t/timestamp_type.test (+16/-0)
tests/suite/mysql_migrate/t/varbinary_type.test (+16/-0)
tests/suite/mysql_migrate/t/varchar_type.test (+16/-0)
tests/suite/mysql_migrate/t/year_type.test (+16/-0)
lp://staging/~linuxjedi/drizzle/trunk-bug-683940
Drizzle Developers: Pending requested
Diff: 140 lines (+40/-81)
1 file modified
client/drizzledump_mysql.cc (+40/-81)
Patrick Crews (patrick-crews)
Changed in drizzle:
status: New → Confirmed
assignee: nobody → Andrew Hutchings (linuxjedi)
Revision history for this message
Andrew Hutchings (linuxjedi) wrote :

ok, this is bad as I added support for this not too long ago :/

Revision history for this message
Andrew Hutchings (linuxjedi) wrote :

Something is wrong with this query around the last where condition for this foreign key (other test ones from the MySQL manual still work):

select rc.constraint_name, rc.referenced_table_name, group_concat(distinct concat('`',kc.column_name,'`')), rc.update_rule, rc.delete_rule, rc.match_option, group_concat(distinct concat('`',kt.column_name,'`')) from information_schema.referential_constraints rc join information_schema.key_column_usage kt on (rc.constraint_schema = kt.constraint_schema and rc.constraint_name = kt.constraint_name) join information_schema.key_column_usage kc on (rc.constraint_schema = kc.constraint_schema and rc.referenced_table_name = kc.table_name and rc.unique_constraint_name = kc.constraint_name) where rc.constraint_schema='SCHEMA' and rc.table_name='TABLE' group by rc.constraint_name

So headaches ahoy!

Revision history for this message
Andrew Hutchings (linuxjedi) wrote :

See also http://bugs.mysql.com/bug.php?id=58656 <- this is the way I wanted to do it

Revision history for this message
Andrew Hutchings (linuxjedi) wrote :

testing this one:

select kc.constraint_name, kc.table_name, group_concat(distinct concat('`',kc.column_name,'`')), kc.referenced_table_name, group_concat(distinct concat('`',kc.referenced_column_name,'`')), update_rule, delete_rule, match_option from information_schema.key_column_usage kc join information_schema.referential_constraints rc on (rc.constraint_schema = kc.constraint_schema and rc.constraint_name = kc.constraint_name) where kc.referenced_table_name is not null group by rc.constraint_name\G

Revision history for this message
Andrew Hutchings (linuxjedi) wrote :

This query hits this in MySQL 5.5:
http://bugs.mysql.com/?id=58658

Also in Leithal's words "it performs like ass".

Switching to a regex on SHOW CREATE TABLE

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