post-merge fixes

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`()

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"));