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Bug#39270 I_S optimization algorithm does not work properly in some cases

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backport to Betony
This commit is contained in:
Sergey Glukhov 2009-10-23 12:02:55 +05:00
parent 424af68331
commit 0a0f50e4ab
3 changed files with 40 additions and 8 deletions
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18
mysql-test/r/information_schema.result
View file

@ -1681,3 +1681,21 @@ ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_
LOCK TABLES t1 READ, information_schema.tables READ;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
DROP TABLE t1;
EXPLAIN SELECT * FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE KEY_COLUMN_USAGE ALL NULL NULL NULL NULL NULL Open_full_table; Scanned all databases
EXPLAIN SELECT * FROM INFORMATION_SCHEMA.PARTITIONS WHERE TABLE_NAME='t1';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE PARTITIONS ALL NULL TABLE_NAME NULL NULL NULL Using where; Open_full_table; Scanned 1 database
EXPLAIN SELECT * FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS
WHERE CONSTRAINT_SCHEMA='test';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE REFERENTIAL_CONSTRAINTS ALL NULL CONSTRAINT_SCHEMA NULL NULL NULL Using where; Open_full_table; Scanned 1 database
EXPLAIN SELECT * FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS
WHERE TABLE_NAME='t1' and TABLE_SCHEMA='test';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE TABLE_CONSTRAINTS ALL NULL TABLE_SCHEMA,TABLE_NAME NULL NULL NULL Using where; Open_full_table; Scanned 0 databases
EXPLAIN SELECT * FROM INFORMATION_SCHEMA.TRIGGERS
WHERE EVENT_OBJECT_SCHEMA='test';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE TRIGGERS ALL NULL EVENT_OBJECT_SCHEMA NULL NULL NULL Using where; Open_full_table; Scanned 1 database

18
mysql-test/t/information_schema.test
View file

@ -1391,9 +1391,6 @@ SET TIMESTAMP=DEFAULT;
--echo End of 5.1 tests.
# Wait till all disconnects are completed
--source include/wait_until_count_sessions.inc
#
# Bug#24062 Incorrect error msg after execute DROP TABLE IF EXISTS on information_schema
#
@ -1431,3 +1428,18 @@ DROP TABLE t1, information_schema.tables;
--error ER_DBACCESS_DENIED_ERROR
LOCK TABLES t1 READ, information_schema.tables READ;
DROP TABLE t1;
#
# Bug#39270 I_S optimization algorithm does not work properly in some cases
#
EXPLAIN SELECT * FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE;
EXPLAIN SELECT * FROM INFORMATION_SCHEMA.PARTITIONS WHERE TABLE_NAME='t1';
EXPLAIN SELECT * FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS
WHERE CONSTRAINT_SCHEMA='test';
EXPLAIN SELECT * FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS
WHERE TABLE_NAME='t1' and TABLE_SCHEMA='test';
EXPLAIN SELECT * FROM INFORMATION_SCHEMA.TRIGGERS
WHERE EVENT_OBJECT_SCHEMA='test';
# Wait till all disconnects are completed
--source include/wait_until_count_sessions.inc

12
sql/sql_show.cc
View file

@ -6717,11 +6717,12 @@ ST_SCHEMA_TABLE schema_tables[]=
fill_variables, make_old_format, 0, 0, -1, 0, 0},
{"KEY_COLUMN_USAGE", key_column_usage_fields_info, create_schema_table,
get_all_tables, 0, get_schema_key_column_usage_record, 4, 5, 0,
OPEN_TABLE_ONLY},
OPTIMIZE_I_S_TABLE|OPEN_TABLE_ONLY},
{"OPEN_TABLES", open_tables_fields_info, create_schema_table,
fill_open_tables, make_old_format, 0, -1, -1, 1, 0},
{"PARTITIONS", partitions_fields_info, create_schema_table,
get_all_tables, 0, get_schema_partitions_record, 1, 2, 0, OPEN_TABLE_ONLY},
get_all_tables, 0, get_schema_partitions_record, 1, 2, 0,
OPTIMIZE_I_S_TABLE|OPEN_TABLE_ONLY},
{"PLUGINS", plugin_fields_info, create_schema_table,
fill_plugins, make_old_format, 0, -1, -1, 0, 0},
{"PROCESSLIST", processlist_fields_info, create_schema_table,
@ -6731,7 +6732,7 @@ ST_SCHEMA_TABLE schema_tables[]=
NULL, -1, -1, false, 0},
{"REFERENTIAL_CONSTRAINTS", referential_constraints_fields_info,
create_schema_table, get_all_tables, 0, get_referential_constraints_record,
1, 9, 0, OPEN_TABLE_ONLY},
1, 9, 0, OPTIMIZE_I_S_TABLE|OPEN_TABLE_ONLY},
{"ROUTINES", proc_fields_info, create_schema_table,
fill_schema_proc, make_proc_old_format, 0, -1, -1, 0, 0},
{"SCHEMATA", schema_fields_info, create_schema_table,
@ -6751,14 +6752,15 @@ ST_SCHEMA_TABLE schema_tables[]=
get_all_tables, make_old_format, get_schema_tables_record, 1, 2, 0,
OPTIMIZE_I_S_TABLE},
{"TABLE_CONSTRAINTS", table_constraints_fields_info, create_schema_table,
get_all_tables, 0, get_schema_constraints_record, 3, 4, 0, OPEN_TABLE_ONLY},
get_all_tables, 0, get_schema_constraints_record, 3, 4, 0,
OPTIMIZE_I_S_TABLE|OPEN_TABLE_ONLY},
{"TABLE_NAMES", table_names_fields_info, create_schema_table,
get_all_tables, make_table_names_old_format, 0, 1, 2, 1, 0},
{"TABLE_PRIVILEGES", table_privileges_fields_info, create_schema_table,
fill_schema_table_privileges, 0, 0, -1, -1, 0, 0},
{"TRIGGERS", triggers_fields_info, create_schema_table,
get_all_tables, make_old_format, get_schema_triggers_record, 5, 6, 0,
OPEN_TABLE_ONLY},
OPTIMIZE_I_S_TABLE|OPEN_TABLE_ONLY},
{"USER_PRIVILEGES", user_privileges_fields_info, create_schema_table,
fill_schema_user_privileges, 0, 0, -1, -1, 0, 0},
{"VARIABLES", variables_fields_info, create_schema_table, fill_variables,