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MDEV-16760 CREATE OR REPLACE TABLE never updates statistical tables

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If the command CREATE OR REPLACE TABLE really replaces a table then
it should remove all data on this table from all statistical tables.
This commit is contained in:
Igor Babaev 2018-07-13 23:03:57 -07:00
parent c89bb15c31
commit 1fd84f9129
4 changed files with 74 additions and 0 deletions
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25
mysql-test/r/stat_tables.result
View File

@ -552,3 +552,28 @@ pk
2
DROP TABLE t1;
set use_stat_tables=@save_use_stat_tables;
#
# MDEV-16760: CREATE OR REPLACE TABLE after ANALYZE TABLE
#
SET use_stat_tables= PREFERABLY;
CREATE TABLE t1 (pk int PRIMARY KEY, c varchar(32));
INSERT INTO t1 VALUES (1,'foo'),(2,'bar');
ANALYZE TABLE t1;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
SELECT * FROM t1;
pk c
1 foo
2 bar
SELECT * FROM mysql.column_stats;
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
test t1 pk 1 2 0.0000 4.0000 1.0000 0 NULL NULL
test t1 c bar foo 0.0000 3.0000 1.0000 0 NULL NULL
CREATE OR REPLACE TABLE t1 (pk int PRIMARY KEY, a char(7));
SELECT * FROM t1;
pk a
SELECT * FROM mysql.column_stats;
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
DROP TABLE t1;
set use_stat_tables=@save_use_stat_tables;

25
mysql-test/r/stat_tables_innodb.result
View File

@ -579,5 +579,30 @@ pk
2
DROP TABLE t1;
set use_stat_tables=@save_use_stat_tables;
#
# MDEV-16760: CREATE OR REPLACE TABLE after ANALYZE TABLE
#
SET use_stat_tables= PREFERABLY;
CREATE TABLE t1 (pk int PRIMARY KEY, c varchar(32));
INSERT INTO t1 VALUES (1,'foo'),(2,'bar');
ANALYZE TABLE t1;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
SELECT * FROM t1;
pk c
1 foo
2 bar
SELECT * FROM mysql.column_stats;
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
test t1 pk 1 2 0.0000 4.0000 1.0000 0 NULL NULL
test t1 c bar foo 0.0000 3.0000 1.0000 0 NULL NULL
CREATE OR REPLACE TABLE t1 (pk int PRIMARY KEY, a char(7));
SELECT * FROM t1;
pk a
SELECT * FROM mysql.column_stats;
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
DROP TABLE t1;
set use_stat_tables=@save_use_stat_tables;
set optimizer_switch=@save_optimizer_switch_for_stat_tables_test;
SET SESSION STORAGE_ENGINE=DEFAULT;

20
mysql-test/t/stat_tables.test
View File

@ -336,3 +336,23 @@ SELECT pk FROM t1;
DROP TABLE t1;
set use_stat_tables=@save_use_stat_tables;
--echo #
--echo # MDEV-16760: CREATE OR REPLACE TABLE after ANALYZE TABLE
--echo #
SET use_stat_tables= PREFERABLY;
CREATE TABLE t1 (pk int PRIMARY KEY, c varchar(32));
INSERT INTO t1 VALUES (1,'foo'),(2,'bar');
ANALYZE TABLE t1;
SELECT * FROM t1;
SELECT * FROM mysql.column_stats;
CREATE OR REPLACE TABLE t1 (pk int PRIMARY KEY, a char(7));
SELECT * FROM t1;
SELECT * FROM mysql.column_stats;
DROP TABLE t1;
set use_stat_tables=@save_use_stat_tables;

4
sql/sql_table.cc
View File

@ -4762,6 +4762,10 @@ int create_table_impl(THD *thd,
{
if (create_info->options & HA_LEX_CREATE_REPLACE)
{
LEX_STRING db_name= {(char *) db, strlen(db)};
LEX_STRING tab_name= {(char *) table_name, strlen(table_name)};
(void) delete_statistics_for_table(thd, &db_name, &tab_name);
TABLE_LIST table_list;
table_list.init_one_table(db, strlen(db), table_name,
strlen(table_name), table_name,