From 0cc6dd83c469b105c6c4e9032d28b01dd208c532 Mon Sep 17 00:00:00 2001 From: unknown Date: Thu, 23 Jun 2005 20:06:35 +0300 Subject: [PATCH 1/3] temporary tables of subquery in the from clause just skipped during processing QC tables (BUG#11522) mysql-test/r/query_cache.result: queries with subquery in the FROM clause mysql-test/t/query_cache.test: queries with subquery in the FROM clause sql/sql_cache.cc: temporary tables of subquery in the from clause just skipped during processing QC tables --- mysql-test/r/query_cache.result | 52 +++++++++++++++++++++++++++++++++ mysql-test/t/query_cache.test | 26 +++++++++++++++++ sql/sql_cache.cc | 17 +++++++++-- 3 files changed, 93 insertions(+), 2 deletions(-) diff --git a/mysql-test/r/query_cache.result b/mysql-test/r/query_cache.result index 55f9bc6c224..ec996fb4128 100644 --- a/mysql-test/r/query_cache.result +++ b/mysql-test/r/query_cache.result @@ -971,4 +971,56 @@ 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flush query cache; drop table t1, t2; +create table t1 (a int); +insert into t1 values (1); +reset query cache; +flush status; +select * from (select * from t1) a; +a +1 +show status like "Qcache_queries_in_cache"; +Variable_name Value +Qcache_queries_in_cache 1 +show status like "Qcache_inserts"; +Variable_name Value +Qcache_inserts 1 +show status like "Qcache_hits"; +Variable_name Value +Qcache_hits 0 +select * from (select * from t1) a; +a +1 +show status like "Qcache_queries_in_cache"; +Variable_name Value +Qcache_queries_in_cache 1 +show status like "Qcache_inserts"; +Variable_name Value +Qcache_inserts 1 +show status like "Qcache_hits"; +Variable_name Value +Qcache_hits 1 +insert into t1 values (2); +show status like "Qcache_queries_in_cache"; +Variable_name Value +Qcache_queries_in_cache 0 +show status like "Qcache_inserts"; +Variable_name Value +Qcache_inserts 1 +show status like "Qcache_hits"; +Variable_name Value +Qcache_hits 1 +select * from (select * from t1) a; +a +1 +2 +show status like "Qcache_queries_in_cache"; +Variable_name Value +Qcache_queries_in_cache 1 +show status like "Qcache_inserts"; +Variable_name Value +Qcache_inserts 2 +show status like "Qcache_hits"; +Variable_name Value +Qcache_hits 1 +drop table t1; set GLOBAL query_cache_size=0; diff --git a/mysql-test/t/query_cache.test b/mysql-test/t/query_cache.test index 170f150f7aa..ecb8fee9af1 100644 --- a/mysql-test/t/query_cache.test +++ b/mysql-test/t/query_cache.test @@ -730,4 +730,30 @@ flush query cache; drop table t1, t2; +create table t1 (a int); +insert into t1 values (1); +reset query cache; +flush status; + +# +# queries with subquery in the FROM clause (BUG#11522) +# +select * from (select * from t1) a; +show status like "Qcache_queries_in_cache"; +show status like "Qcache_inserts"; +show status like "Qcache_hits"; +select * from (select * from t1) a; +show status like "Qcache_queries_in_cache"; +show status like "Qcache_inserts"; +show status like "Qcache_hits"; +insert into t1 values (2); +show status like "Qcache_queries_in_cache"; +show status like "Qcache_inserts"; +show status like "Qcache_hits"; +select * from (select * from t1) a; +show status like "Qcache_queries_in_cache"; +show status like "Qcache_inserts"; +show status like "Qcache_hits"; +drop table t1; + set GLOBAL query_cache_size=0; diff --git a/sql/sql_cache.cc b/sql/sql_cache.cc index 8deb3489782..366a13d59ba 100644 --- a/sql/sql_cache.cc +++ b/sql/sql_cache.cc @@ -2114,6 +2114,13 @@ my_bool Query_cache::register_all_tables(Query_cache_block *block, for (n=0; tables_used; tables_used=tables_used->next, n++, block_table++) { + if (tables_used->derived) + { + DBUG_PRINT("qcache", ("derived table skipped")); + n--; + block_table--; + continue; + } DBUG_PRINT("qcache", ("table %s, db %s, openinfo at 0x%lx, keylen %u, key at 0x%lx", tables_used->real_name, tables_used->db, @@ -2671,7 +2678,8 @@ TABLE_COUNTER_TYPE Query_cache::is_cacheable(THD *thd, uint32 query_len, table_alias_charset used here because it depends of lower_case_table_names variable */ - if (tables_used->table->tmp_table != NO_TMP_TABLE || + if ((tables_used->table->tmp_table != NO_TMP_TABLE && + !tables_used->derived) || (*tables_type & HA_CACHE_TBL_NOCACHE) || (tables_used->db_length == 5 && my_strnncoll(table_alias_charset, (uchar*)tables_used->db, 6, @@ -2682,7 +2690,12 @@ TABLE_COUNTER_TYPE Query_cache::is_cacheable(THD *thd, uint32 query_len, other non-cacheable table(s)")); DBUG_RETURN(0); } - if (tables_used->table->db_type == DB_TYPE_MRG_MYISAM) + if (tables_used->derived) + { + table_count--; + DBUG_PRINT("qcache", ("derived table skipped")); + } + else if (tables_used->table->db_type == DB_TYPE_MRG_MYISAM) { ha_myisammrg *handler = (ha_myisammrg *)tables_used->table->file; MYRG_INFO *file = handler->myrg_info(); From e45709dfbdb7e834fc46fa8c112452ac9218b9f7 Mon Sep 17 00:00:00 2001 From: unknown Date: Tue, 28 Jun 2005 00:52:21 +0300 Subject: [PATCH 2/3] abort storing query to query cache if warnings appeared (BUG#9414) mysql-test/r/query_cache.result: Query with warning prohibited to query cache mysql-test/t/query_cache.test: Query with warning prohibited to query cache sql/sql_error.cc: abort storing query to query cache if warnings appeared --- mysql-test/r/query_cache.result | 35 +++++++++++++++++++++++++++++++++ mysql-test/t/query_cache.test | 19 ++++++++++++++++++ sql/sql_error.cc | 2 ++ 3 files changed, 56 insertions(+) diff --git a/mysql-test/r/query_cache.result b/mysql-test/r/query_cache.result index 55f9bc6c224..a60b3cdbb1b 100644 --- a/mysql-test/r/query_cache.result +++ b/mysql-test/r/query_cache.result @@ -971,4 +971,39 @@ abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzab 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flush query cache; drop table t1, t2; +flush status; +CREATE TABLE t1 ( +`date` datetime NOT NULL default '0000-00-00 00:00:00', +KEY `date` (`date`) +) ENGINE=MyISAM; +INSERT INTO t1 VALUES ('20050326'); +INSERT INTO t1 VALUES ('20050325'); +SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050327 0:0:0'; +COUNT(*) +0 +Warnings: +Warning 1292 Truncated incorrect datetime value: '20050327 0:0:0' +Warning 1292 Truncated incorrect datetime value: '20050327 0:0:0' +SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050328 0:0:0'; +COUNT(*) +0 +Warnings: +Warning 1292 Truncated incorrect datetime value: '20050328 0:0:0' +Warning 1292 Truncated incorrect datetime value: '20050328 0:0:0' +SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050327 0:0:0'; +COUNT(*) +0 +Warnings: +Warning 1292 Truncated incorrect datetime value: '20050327 0:0:0' +Warning 1292 Truncated incorrect datetime value: '20050327 0:0:0' +show status like "Qcache_queries_in_cache"; +Variable_name Value +Qcache_queries_in_cache 0 +show status like "Qcache_inserts"; +Variable_name Value +Qcache_inserts 0 +show status like "Qcache_hits"; +Variable_name Value +Qcache_hits 0 +drop table t1; set GLOBAL query_cache_size=0; diff --git a/mysql-test/t/query_cache.test b/mysql-test/t/query_cache.test index 170f150f7aa..db78060ae2b 100644 --- a/mysql-test/t/query_cache.test +++ b/mysql-test/t/query_cache.test @@ -730,4 +730,23 @@ flush query cache; drop table t1, t2; +# +# Query with warning prohibited to query cache (BUG#9414) +# +flush status; +CREATE TABLE t1 ( + `date` datetime NOT NULL default '0000-00-00 00:00:00', + KEY `date` (`date`) +) ENGINE=MyISAM; + +INSERT INTO t1 VALUES ('20050326'); +INSERT INTO t1 VALUES ('20050325'); +SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050327 0:0:0'; +SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050328 0:0:0'; +SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050327 0:0:0'; +show status like "Qcache_queries_in_cache"; +show status like "Qcache_inserts"; +show status like "Qcache_hits"; +drop table t1; + set GLOBAL query_cache_size=0; diff --git a/sql/sql_error.cc b/sql/sql_error.cc index a31e15d0745..b24d15b6e3b 100644 --- a/sql/sql_error.cc +++ b/sql/sql_error.cc @@ -108,6 +108,8 @@ MYSQL_ERROR *push_warning(THD *thd, MYSQL_ERROR::enum_warning_level level, if (level == MYSQL_ERROR::WARN_LEVEL_NOTE && !(thd->options & OPTION_SQL_NOTES)) return(0); + query_cache_abort(&thd->net); + if (thd->query_id != thd->warn_id) mysql_reset_errors(thd); From dd72175d0b3b23f1b8873e21e9348e807990e7ce Mon Sep 17 00:00:00 2001 From: unknown Date: Tue, 5 Jul 2005 12:23:13 +0300 Subject: [PATCH 3/3] post-merge fixes mysql-test/r/query_cache.result: results moved sql/sql_cache.cc: postmerge fixes --- mysql-test/r/query_cache.result | 179 ++++++++++++++++---------------- sql/sql_cache.cc | 5 +- 2 files changed, 91 insertions(+), 93 deletions(-) diff --git a/mysql-test/r/query_cache.result b/mysql-test/r/query_cache.result index 8123522cd2c..699d81d4cef 100644 --- a/mysql-test/r/query_cache.result +++ b/mysql-test/r/query_cache.result @@ -923,94 +923,6 @@ select group_concat(a) FROM t1 group by b; group_concat(a) 12345678901234567890 set group_concat_max_len=default; -drop table t1; -flush status; -CREATE TABLE t1 ( -`date` datetime NOT NULL default '0000-00-00 00:00:00', -KEY `date` (`date`) -) ENGINE=MyISAM; -INSERT INTO t1 VALUES ('20050326'); -INSERT INTO t1 VALUES ('20050325'); -SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050327 0:0:0'; -COUNT(*) -0 -Warnings: -Warning 1292 Truncated incorrect datetime value: '20050327 0:0:0' -Warning 1292 Truncated incorrect datetime value: '20050327 0:0:0' -SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050328 0:0:0'; -COUNT(*) -0 -Warnings: -Warning 1292 Truncated incorrect datetime value: '20050328 0:0:0' -Warning 1292 Truncated incorrect datetime value: '20050328 0:0:0' -SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050327 0:0:0'; -COUNT(*) -0 -Warnings: -Warning 1292 Truncated incorrect datetime value: '20050327 0:0:0' -Warning 1292 Truncated incorrect datetime value: '20050327 0:0:0' -show status like "Qcache_queries_in_cache"; -Variable_name Value -Qcache_queries_in_cache 0 -show status like "Qcache_inserts"; -Variable_name Value -Qcache_inserts 0 -show status like "Qcache_hits"; -Variable_name Value -Qcache_hits 0 -drop table t1; -create table t1 (a int); -insert into t1 values (1); -reset query cache; -flush status; -select * from (select * from t1) a; -a -1 -show status like "Qcache_queries_in_cache"; -Variable_name Value -Qcache_queries_in_cache 1 -show status like "Qcache_inserts"; -Variable_name Value -Qcache_inserts 1 -show status like "Qcache_hits"; -Variable_name Value -Qcache_hits 0 -select * from (select * from t1) a; -a -1 -show status like "Qcache_queries_in_cache"; -Variable_name Value -Qcache_queries_in_cache 1 -show status like "Qcache_inserts"; -Variable_name Value -Qcache_inserts 1 -show status like "Qcache_hits"; -Variable_name Value -Qcache_hits 1 -insert into t1 values (2); -show status like "Qcache_queries_in_cache"; -Variable_name Value -Qcache_queries_in_cache 0 -show status like "Qcache_inserts"; -Variable_name Value -Qcache_inserts 1 -show status like "Qcache_hits"; -Variable_name Value -Qcache_hits 1 -select * from (select * from t1) a; -a -1 -2 -show status like "Qcache_queries_in_cache"; -Variable_name Value -Qcache_queries_in_cache 1 -show status like "Qcache_inserts"; -Variable_name Value -Qcache_inserts 2 -show status like "Qcache_hits"; -Variable_name Value -Qcache_hits 1 - drop table t1; create table t1 (a int); show status like "Qcache_queries_in_cache"; @@ -1018,7 +930,7 @@ Variable_name Value Qcache_queries_in_cache 0 show status like "Qcache_inserts"; Variable_name Value -Qcache_inserts 19 +Qcache_inserts 18 show status like "Qcache_hits"; Variable_name Value Qcache_hits 6 @@ -1031,7 +943,7 @@ Variable_name Value Qcache_queries_in_cache 1 show status like "Qcache_inserts"; Variable_name Value -Qcache_inserts 20 +Qcache_inserts 19 show status like "Qcache_hits"; Variable_name Value Qcache_hits 7 @@ -1095,6 +1007,93 @@ abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzab 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flush query cache; drop table t1, t2; +flush status; +CREATE TABLE t1 ( +`date` datetime NOT NULL default '0000-00-00 00:00:00', +KEY `date` (`date`) +) ENGINE=MyISAM; +INSERT INTO t1 VALUES ('20050326'); +INSERT INTO t1 VALUES ('20050325'); +SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050327 0:0:0'; +COUNT(*) +0 +Warnings: +Warning 1292 Incorrect datetime value: '20050327 0:0:0' for column 'date' at row 1 +Warning 1292 Incorrect datetime value: '20050327 0:0:0' for column 'date' at row 1 +SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050328 0:0:0'; +COUNT(*) +0 +Warnings: +Warning 1292 Incorrect datetime value: '20050328 0:0:0' for column 'date' at row 1 +Warning 1292 Incorrect datetime value: '20050328 0:0:0' for column 'date' at row 1 +SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050327 0:0:0'; +COUNT(*) +0 +Warnings: +Warning 1292 Incorrect datetime value: '20050327 0:0:0' for column 'date' at row 1 +Warning 1292 Incorrect datetime value: '20050327 0:0:0' for column 'date' at row 1 +show status like "Qcache_queries_in_cache"; +Variable_name Value +Qcache_queries_in_cache 0 +show status like "Qcache_inserts"; +Variable_name Value +Qcache_inserts 0 +show status like "Qcache_hits"; +Variable_name Value +Qcache_hits 0 +drop table t1; +create table t1 (a int); +insert into t1 values (1); +reset query cache; +flush status; +select * from (select * from t1) a; +a +1 +show status like "Qcache_queries_in_cache"; +Variable_name Value +Qcache_queries_in_cache 1 +show status like "Qcache_inserts"; +Variable_name Value +Qcache_inserts 1 +show status like "Qcache_hits"; +Variable_name Value +Qcache_hits 0 +select * from (select * from t1) a; +a +1 +show status like "Qcache_queries_in_cache"; +Variable_name Value +Qcache_queries_in_cache 1 +show status like "Qcache_inserts"; +Variable_name Value +Qcache_inserts 1 +show status like "Qcache_hits"; +Variable_name Value +Qcache_hits 1 +insert into t1 values (2); +show status like "Qcache_queries_in_cache"; +Variable_name Value +Qcache_queries_in_cache 0 +show status like "Qcache_inserts"; +Variable_name Value +Qcache_inserts 1 +show status like "Qcache_hits"; +Variable_name Value +Qcache_hits 1 +select * from (select * from t1) a; +a +1 +2 +show status like "Qcache_queries_in_cache"; +Variable_name Value +Qcache_queries_in_cache 1 +show status like "Qcache_inserts"; +Variable_name Value +Qcache_inserts 2 +show status like "Qcache_hits"; +Variable_name Value +Qcache_hits 1 +drop table t1; create table t1 (a int); insert into t1 values (1),(2); CREATE PROCEDURE `p1`() diff --git a/sql/sql_cache.cc b/sql/sql_cache.cc index 279a1ccb443..e0a15b7d449 100644 --- a/sql/sql_cache.cc +++ b/sql/sql_cache.cc @@ -278,7 +278,6 @@ TODO list: - Move MRG_MYISAM table type processing to handlers, something like: tables_used->table->file->register_used_filenames(callback, first_argument); - - Make derived tables cachable. - QC improvement suggested by Monty: - Add a counter in open_table() for how many MERGE (ISAM or MyISAM) tables are cached in the table cache. @@ -2137,7 +2136,7 @@ Query_cache::register_tables_from_list(TABLE_LIST *tables_used, { if (tables_used->derived) { - DBUG_PRINT("qcache", ("derived table skipped"); + DBUG_PRINT("qcache", ("derived table skipped")); n--; block_table--; continue; @@ -2785,7 +2784,7 @@ static TABLE_COUNTER_TYPE process_and_count_tables(TABLE_LIST *tables_used, tables_used->table->s->table_name, tables_used->table->s->table_cache_key, tables_used->table->s->db_type)); - if (table_used->derived) + if (tables_used->derived) { table_count--; DBUG_PRINT("qcache", ("derived table skipped"));