Merge chilla.local:/home/mydev/mysql-5.0-amain

into  chilla.local:/home/mydev/mysql-5.0-axmrg


configure.in:
  Auto merged

include/keycache.h

@@ -46,7 +46,6 @@ typedef struct st_key_cache
   my_bool key_cache_inited;
   my_bool resize_in_flush;       /* true during flush of resize operation    */
   my_bool can_be_used;           /* usage of cache for read/write is allowed */
-  uint key_cache_shift;
   ulong key_cache_mem_size;      /* specified size of the cache memory       */
   uint key_cache_block_size;     /* size of the page buffer of a cache block */
   ulong min_warm_blocks;         /* min number of warm blocks;               */

myisammrg/myrg_def.h

@@ -29,4 +29,7 @@ extern pthread_mutex_t THR_LOCK_open;
 
 int _myrg_init_queue(MYRG_INFO *info,int inx,enum ha_rkey_function search_flag);
 int _myrg_mi_read_record(MI_INFO *info, byte *buf);
-
+#ifdef __cplusplus
+extern "C" 
+#endif
+void myrg_print_wrong_table(const char *table_name);

myisammrg/myrg_open.c

@@ -90,6 +90,11 @@ MYRG_INFO *myrg_open(const char *name, int mode, int handle_locking)
     if (!(isam=mi_open(buff,mode,(handle_locking?HA_OPEN_WAIT_IF_LOCKED:0))))
     {
       my_errno= HA_ERR_WRONG_MRG_TABLE_DEF;
+      if (handle_locking & HA_OPEN_FOR_REPAIR)
+      {
+        myrg_print_wrong_table(buff);
+        continue;
+      }
       goto err;
     }
     if (!m_info)                                /* First file */
@@ -118,6 +123,11 @@ MYRG_INFO *myrg_open(const char *name, int mode, int handle_locking)
     if (m_info->reclength != isam->s->base.reclength)
     {
       my_errno=HA_ERR_WRONG_MRG_TABLE_DEF;
+      if (handle_locking & HA_OPEN_FOR_REPAIR)
+      {
+        myrg_print_wrong_table(buff);
+        continue;
+      }
       goto err;
     }
     m_info->options|= isam->s->options;
@@ -131,6 +141,8 @@ MYRG_INFO *myrg_open(const char *name, int mode, int handle_locking)
                                      m_info->tables);
   }
 
+  if (my_errno == HA_ERR_WRONG_MRG_TABLE_DEF)
+    goto err;
   if (!m_info && !(m_info= (MYRG_INFO*) my_malloc(sizeof(MYRG_INFO),
                                                   MYF(MY_WME | MY_ZEROFILL))))
     goto err;

mysql-test/r/backup.result

@@ -4,18 +4,16 @@ create table t4(n int);
 backup table t4 to '../bogus';
 Table	Op	Msg_type	Msg_text
 test.t4	backup	error	Failed copying .frm file (errno: X)
+test.t4	backup	Error	Can't create/write to file 'MYSQLTEST_VARDIR/bogus/t4.frm' (Errcode: X)
 test.t4	backup	status	Operation failed
-Warnings:
-Error	1	Can't create/write to file 'MYSQLTEST_VARDIR/bogus/t4.frm' (Errcode: X)
 backup table t4 to '../tmp';
 Table	Op	Msg_type	Msg_text
 test.t4	backup	status	OK
 backup table t4 to '../tmp';
 Table	Op	Msg_type	Msg_text
 test.t4	backup	error	Failed copying .frm file (errno: X)
+test.t4	backup	Error	Can't create/write to file 'MYSQLTEST_VARDIR/tmp/t4.frm' (Errcode: X)
 test.t4	backup	status	Operation failed
-Warnings:
-Error	1	Can't create/write to file 'MYSQLTEST_VARDIR/tmp/t4.frm' (Errcode: X)
 drop table t4;
 restore table t4 from '../tmp';
 Table	Op	Msg_type	Msg_text

mysql-test/r/key_cache.result

@@ -191,10 +191,8 @@ cache index t1 in unknown_key_cache;
 ERROR HY000: Unknown key cache 'unknown_key_cache'
 cache index t1 key (unknown_key) in keycache1;
 Table	Op	Msg_type	Msg_text
-test.t1	assign_to_keycache	error	Key 'unknown_key' doesn't exist in table 't1'
+test.t1	assign_to_keycache	Error	Key 'unknown_key' doesn't exist in table 't1'
 test.t1	assign_to_keycache	status	Operation failed
-Warnings:
-Error	1176	Key 'unknown_key' doesn't exist in table 't1'
 select @@keycache2.key_buffer_size;
 @@keycache2.key_buffer_size
 4194304
@@ -341,3 +339,30 @@ Warning	1438	Cannot drop default keycache
 select @@global.key_buffer_size;
 @@global.key_buffer_size
 2097152
+SET @bug28478_key_cache_block_size= @@global.key_cache_block_size;
+SET GLOBAL key_cache_block_size= 1536;
+CREATE TABLE t1 (
+id BIGINT NOT NULL AUTO_INCREMENT PRIMARY KEY,
+c1 CHAR(150),
+c2 CHAR(150),
+c3 CHAR(150),
+KEY(c1, c2, c3)
+) ENGINE= MyISAM;
+INSERT INTO t1 (c1, c2, c3) VALUES
+('a', 'b', 'c'), ('b', 'c', 'd'), ('c', 'd', 'e'), ('d', 'e', 'f'),
+('e', 'f', 'g'), ('f', 'g', 'h'), ('g', 'h', 'i'), ('h', 'i', 'j'),
+('i', 'j', 'k'), ('j', 'k', 'l'), ('k', 'l', 'm'), ('l', 'm', 'n'),
+('m', 'n', 'o'), ('n', 'o', 'p'), ('o', 'p', 'q'), ('p', 'q', 'r'),
+('q', 'r', 's'), ('r', 's', 't'), ('s', 't', 'u'), ('t', 'u', 'v'),
+('u', 'v', 'w'), ('v', 'w', 'x'), ('w', 'x', 'y'), ('x', 'y', 'z');
+INSERT INTO t1 (c1, c2, c3) SELECT c1, c2, c3 from t1;
+INSERT INTO t1 (c1, c2, c3) SELECT c1, c2, c3 from t1;
+INSERT INTO t1 (c1, c2, c3) SELECT c1, c2, c3 from t1;
+CHECK TABLE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	check	status	OK
+SHOW VARIABLES LIKE 'key_cache_block_size';
+Variable_name	Value
+key_cache_block_size	1536
+SET GLOBAL key_cache_block_size= @bug28478_key_cache_block_size;
+DROP TABLE t1;

mysql-test/r/lock.result

@@ -40,7 +40,8 @@ test.t1	check	status	OK
 lock tables t1 write;
 check table t2;
 Table	Op	Msg_type	Msg_text
-test.t2	check	error	Table 't2' was not locked with LOCK TABLES
+test.t2	check	Error	Table 't2' was not locked with LOCK TABLES
+test.t2	check	error	Corrupt
 insert into t1 select index1,nr from t1;
 ERROR HY000: Table 't1' was not locked with LOCK TABLES
 unlock tables;

mysql-test/r/merge.result

@@ -844,4 +844,36 @@ insert into t1 values (1);
 ERROR HY000: Table 't1' is read only
 drop table t2;
 drop table t1;
+CREATE TABLE tm1(a INT) ENGINE=MERGE UNION=(t1, t2);
+SELECT * FROM tm1;
+ERROR HY000: Unable to open underlying table which is differently defined or of non-MyISAM type or doesn't exist
+CHECK TABLE tm1;
+Table	Op	Msg_type	Msg_text
+test.tm1	check	Error	Table './test/t1' is differently defined or of non-MyISAM type or doesn't exist
+test.tm1	check	Error	Table './test/t2' is differently defined or of non-MyISAM type or doesn't exist
+test.tm1	check	Error	Unable to open underlying table which is differently defined or of non-MyISAM type or doesn't exist
+test.tm1	check	error	Corrupt
+CREATE TABLE t1(a INT);
+SELECT * FROM tm1;
+ERROR HY000: Unable to open underlying table which is differently defined or of non-MyISAM type or doesn't exist
+CHECK TABLE tm1;
+Table	Op	Msg_type	Msg_text
+test.tm1	check	Error	Table './test/t2' is differently defined or of non-MyISAM type or doesn't exist
+test.tm1	check	Error	Unable to open underlying table which is differently defined or of non-MyISAM type or doesn't exist
+test.tm1	check	error	Corrupt
+CREATE TABLE t2(a BLOB);
+SELECT * FROM tm1;
+ERROR HY000: Unable to open underlying table which is differently defined or of non-MyISAM type or doesn't exist
+CHECK TABLE tm1;
+Table	Op	Msg_type	Msg_text
+test.tm1	check	Error	Table './test/t2' is differently defined or of non-MyISAM type or doesn't exist
+test.tm1	check	Error	Unable to open underlying table which is differently defined or of non-MyISAM type or doesn't exist
+test.tm1	check	error	Corrupt
+ALTER TABLE t2 MODIFY a INT;
+SELECT * FROM tm1;
+a
+CHECK TABLE tm1;
+Table	Op	Msg_type	Msg_text
+test.tm1	check	status	OK
+DROP TABLE tm1, t1, t2;
 End of 5.0 tests

mysql-test/r/preload.result

@@ -143,10 +143,9 @@ Key_read_requests	0
 Key_reads	0
 load index into cache t3, t2 key (primary,b) ;
 Table	Op	Msg_type	Msg_text
-test.t3	preload_keys	error	Table 'test.t3' doesn't exist
+test.t3	preload_keys	Error	Table 'test.t3' doesn't exist
+test.t3	preload_keys	error	Corrupt
 test.t2	preload_keys	status	OK
-Warnings:
-Error	1146	Table 'test.t3' doesn't exist
 show status like "key_read%";
 Variable_name	Value
 Key_read_requests	478
@@ -159,12 +158,10 @@ Key_read_requests	0
 Key_reads	0
 load index into cache t3 key (b), t2 key (c) ;
 Table	Op	Msg_type	Msg_text
-test.t3	preload_keys	error	Table 'test.t3' doesn't exist
-test.t2	preload_keys	error	Key 'c' doesn't exist in table 't2'
+test.t3	preload_keys	Error	Table 'test.t3' doesn't exist
+test.t3	preload_keys	error	Corrupt
+test.t2	preload_keys	Error	Key 'c' doesn't exist in table 't2'
 test.t2	preload_keys	status	Operation failed
-Warnings:
-Error	1146	Table 'test.t3' doesn't exist
-Error	1176	Key 'c' doesn't exist in table 't2'
 show status like "key_read%";
 Variable_name	Value
 Key_read_requests	0

mysql-test/r/ps.result

@@ -1378,45 +1378,39 @@ prepare stmt from "repair table t1, t4, t3";
 execute stmt;
 Table	Op	Msg_type	Msg_text
 test.t1	repair	status	OK
-test.t4	repair	error	Table 'test.t4' doesn't exist
+test.t4	repair	Error	Table 'test.t4' doesn't exist
+test.t4	repair	error	Corrupt
 test.t3	repair	status	OK
-Warnings:
-Error	1146	Table 'test.t4' doesn't exist
 execute stmt;
 Table	Op	Msg_type	Msg_text
 test.t1	repair	status	OK
-test.t4	repair	error	Table 'test.t4' doesn't exist
+test.t4	repair	Error	Table 'test.t4' doesn't exist
+test.t4	repair	error	Corrupt
 test.t3	repair	status	OK
-Warnings:
-Error	1146	Table 'test.t4' doesn't exist
 prepare stmt from "optimize table t1, t3, t4";
 execute stmt;
 Table	Op	Msg_type	Msg_text
 test.t1	optimize	status	OK
 test.t3	optimize	status	OK
-test.t4	optimize	error	Table 'test.t4' doesn't exist
-Warnings:
-Error	1146	Table 'test.t4' doesn't exist
+test.t4	optimize	Error	Table 'test.t4' doesn't exist
+test.t4	optimize	error	Corrupt
 execute stmt;
 Table	Op	Msg_type	Msg_text
 test.t1	optimize	status	Table is already up to date
 test.t3	optimize	status	Table is already up to date
-test.t4	optimize	error	Table 'test.t4' doesn't exist
-Warnings:
-Error	1146	Table 'test.t4' doesn't exist
+test.t4	optimize	Error	Table 'test.t4' doesn't exist
+test.t4	optimize	error	Corrupt
 prepare stmt from "analyze table t4, t1";
 execute stmt;
 Table	Op	Msg_type	Msg_text
-test.t4	analyze	error	Table 'test.t4' doesn't exist
+test.t4	analyze	Error	Table 'test.t4' doesn't exist
+test.t4	analyze	error	Corrupt
 test.t1	analyze	status	Table is already up to date
-Warnings:
-Error	1146	Table 'test.t4' doesn't exist
 execute stmt;
 Table	Op	Msg_type	Msg_text
-test.t4	analyze	error	Table 'test.t4' doesn't exist
+test.t4	analyze	Error	Table 'test.t4' doesn't exist
+test.t4	analyze	error	Corrupt
 test.t1	analyze	status	Table is already up to date
-Warnings:
-Error	1146	Table 'test.t4' doesn't exist
 deallocate prepare stmt;
 drop table t1, t2, t3;
 create database mysqltest_long_database_name_to_thrash_heap;

mysql-test/r/repair.result

@@ -26,16 +26,14 @@ t1	1	st_key	1	st	A	NULL	NULL	NULL	YES	BTREE	disabled
 drop table t1;
 repair table t1 use_frm;
 Table	Op	Msg_type	Msg_text
-test.t1	repair	error	Table 'test.t1' doesn't exist
-Warnings:
-Error	1146	Table 'test.t1' doesn't exist
+test.t1	repair	Error	Table 'test.t1' doesn't exist
+test.t1	repair	error	Corrupt
 create table t1 engine=myisam SELECT 1,"table 1";
 flush tables;
 repair table t1;
 Table	Op	Msg_type	Msg_text
-test.t1	repair	error	Incorrect file format 't1'
-Warnings:
-Error	130	Incorrect file format 't1'
+test.t1	repair	Error	Incorrect file format 't1'
+test.t1	repair	error	Corrupt
 repair table t1 use_frm;
 Table	Op	Msg_type	Msg_text
 test.t1	repair	warning	Number of rows changed from 0 to 1

mysql-test/r/rpl_failed_optimize.result

@@ -15,7 +15,6 @@ Warnings:
 Error	1205	Lock wait timeout exceeded; try restarting transaction
 OPTIMIZE TABLE non_existing;
 Table	Op	Msg_type	Msg_text
-test.non_existing	optimize	error	Table 'test.non_existing' doesn't exist
-Warnings:
-Error	1146	Table 'test.non_existing' doesn't exist
+test.non_existing	optimize	Error	Table 'test.non_existing' doesn't exist
+test.non_existing	optimize	error	Corrupt
 drop table t1;

mysql-test/r/sp.result

@@ -4409,55 +4409,58 @@ Table	Op	Msg_type	Msg_text
 test.t1	repair	status	OK
 test.t2	repair	status	OK
 test.t3	repair	status	OK
-test.v1	repair	error	'test.v1' is not BASE TABLE
+test.v1	repair	Error	'test.v1' is not BASE TABLE
+test.v1	repair	error	Corrupt
 Table	Op	Msg_type	Msg_text
 test.t1	optimize	status	OK
 test.t2	optimize	status	OK
 test.t3	optimize	status	OK
-test.v1	optimize	error	'test.v1' is not BASE TABLE
+test.v1	optimize	Error	'test.v1' is not BASE TABLE
+test.v1	optimize	error	Corrupt
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	Table is already up to date
 test.t2	analyze	status	Table is already up to date
 test.t3	analyze	status	Table is already up to date
-test.v1	analyze	error	'test.v1' is not BASE TABLE
-Warnings:
-Error	1347	'test.v1' is not BASE TABLE
+test.v1	analyze	Error	'test.v1' is not BASE TABLE
+test.v1	analyze	error	Corrupt
 call bug13012()|
 Table	Op	Msg_type	Msg_text
 test.t1	repair	status	OK
 test.t2	repair	status	OK
 test.t3	repair	status	OK
-test.v1	repair	error	'test.v1' is not BASE TABLE
+test.v1	repair	Error	'test.v1' is not BASE TABLE
+test.v1	repair	error	Corrupt
 Table	Op	Msg_type	Msg_text
 test.t1	optimize	status	OK
 test.t2	optimize	status	OK
 test.t3	optimize	status	OK
-test.v1	optimize	error	'test.v1' is not BASE TABLE
+test.v1	optimize	Error	'test.v1' is not BASE TABLE
+test.v1	optimize	error	Corrupt
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	Table is already up to date
 test.t2	analyze	status	Table is already up to date
 test.t3	analyze	status	Table is already up to date
-test.v1	analyze	error	'test.v1' is not BASE TABLE
-Warnings:
-Error	1347	'test.v1' is not BASE TABLE
+test.v1	analyze	Error	'test.v1' is not BASE TABLE
+test.v1	analyze	error	Corrupt
 call bug13012()|
 Table	Op	Msg_type	Msg_text
 test.t1	repair	status	OK
 test.t2	repair	status	OK
 test.t3	repair	status	OK
-test.v1	repair	error	'test.v1' is not BASE TABLE
+test.v1	repair	Error	'test.v1' is not BASE TABLE
+test.v1	repair	error	Corrupt
 Table	Op	Msg_type	Msg_text
 test.t1	optimize	status	OK
 test.t2	optimize	status	OK
 test.t3	optimize	status	OK
-test.v1	optimize	error	'test.v1' is not BASE TABLE
+test.v1	optimize	Error	'test.v1' is not BASE TABLE
+test.v1	optimize	error	Corrupt
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	Table is already up to date
 test.t2	analyze	status	Table is already up to date
 test.t3	analyze	status	Table is already up to date
-test.v1	analyze	error	'test.v1' is not BASE TABLE
-Warnings:
-Error	1347	'test.v1' is not BASE TABLE
+test.v1	analyze	Error	'test.v1' is not BASE TABLE
+test.v1	analyze	error	Corrupt
 drop procedure bug13012|
 drop view v1;
 select * from t1|

mysql-test/r/view.result

@@ -1377,7 +1377,9 @@ test.t1	check	status	OK
 drop table t1;
 check table v1;
 Table	Op	Msg_type	Msg_text
-test.v1	check	error	View 'test.v1' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
+test.v1	check	Error	Table 'test.t1' doesn't exist
+test.v1	check	Error	View 'test.v1' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
+test.v1	check	error	Corrupt
 drop view v1;
 create table t1 (a int);
 create table t2 (a int);
@@ -1901,11 +1903,17 @@ CREATE VIEW v6 AS SELECT CONVERT_TZ(col1,'GMT','MET') FROM t2;
 DROP TABLE t1;
 CHECK TABLE v1, v2, v3, v4, v5, v6;
 Table	Op	Msg_type	Msg_text
-test.v1	check	error	View 'test.v1' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
+test.v1	check	Error	Table 'test.t1' doesn't exist
+test.v1	check	Error	View 'test.v1' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
+test.v1	check	error	Corrupt
 test.v2	check	status	OK
-test.v3	check	error	View 'test.v3' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
+test.v3	check	Error	Table 'test.t1' doesn't exist
+test.v3	check	Error	View 'test.v3' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
+test.v3	check	error	Corrupt
 test.v4	check	status	OK
-test.v5	check	error	View 'test.v5' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
+test.v5	check	Error	Table 'test.t1' doesn't exist
+test.v5	check	Error	View 'test.v5' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
+test.v5	check	error	Corrupt
 test.v6	check	status	OK
 drop view v1, v2, v3, v4, v5, v6;
 drop table t2;
@@ -1925,11 +1933,17 @@ CREATE VIEW v6 AS SELECT f2() FROM t3;
 drop function f1;
 CHECK TABLE v1, v2, v3, v4, v5, v6;
 Table	Op	Msg_type	Msg_text
-test.v1	check	error	View 'test.v1' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
+test.v1	check	Error	FUNCTION test.f1 does not exist
+test.v1	check	Error	View 'test.v1' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
+test.v1	check	error	Corrupt
 test.v2	check	status	OK
-test.v3	check	error	View 'test.v3' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
+test.v3	check	Error	FUNCTION test.f1 does not exist
+test.v3	check	Error	View 'test.v3' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
+test.v3	check	error	Corrupt
 test.v4	check	status	OK
-test.v5	check	error	View 'test.v5' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
+test.v5	check	Error	FUNCTION test.f1 does not exist
+test.v5	check	Error	View 'test.v5' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
+test.v5	check	error	Corrupt
 test.v6	check	status	OK
 create function f1 () returns int return (select max(col1) from t1);
 DROP TABLE t1;
@@ -2376,35 +2390,29 @@ CREATE TABLE t1(id INT);
 CREATE VIEW v1 AS SELECT id FROM t1;
 OPTIMIZE TABLE v1;
 Table	Op	Msg_type	Msg_text
-test.v1	optimize	error	'test.v1' is not BASE TABLE
-Warnings:
-Error	1347	'test.v1' is not BASE TABLE
+test.v1	optimize	Error	'test.v1' is not BASE TABLE
+test.v1	optimize	error	Corrupt
 ANALYZE TABLE v1;
 Table	Op	Msg_type	Msg_text
-test.v1	analyze	error	'test.v1' is not BASE TABLE
-Warnings:
-Error	1347	'test.v1' is not BASE TABLE
+test.v1	analyze	Error	'test.v1' is not BASE TABLE
+test.v1	analyze	error	Corrupt
 REPAIR TABLE v1;
 Table	Op	Msg_type	Msg_text
-test.v1	repair	error	'test.v1' is not BASE TABLE
-Warnings:
-Error	1347	'test.v1' is not BASE TABLE
+test.v1	repair	Error	'test.v1' is not BASE TABLE
+test.v1	repair	error	Corrupt
 DROP TABLE t1;
 OPTIMIZE TABLE v1;
 Table	Op	Msg_type	Msg_text
-test.v1	optimize	error	'test.v1' is not BASE TABLE
-Warnings:
-Error	1347	'test.v1' is not BASE TABLE
+test.v1	optimize	Error	'test.v1' is not BASE TABLE
+test.v1	optimize	error	Corrupt
 ANALYZE TABLE v1;
 Table	Op	Msg_type	Msg_text
-test.v1	analyze	error	'test.v1' is not BASE TABLE
-Warnings:
-Error	1347	'test.v1' is not BASE TABLE
+test.v1	analyze	Error	'test.v1' is not BASE TABLE
+test.v1	analyze	error	Corrupt
 REPAIR TABLE v1;
 Table	Op	Msg_type	Msg_text
-test.v1	repair	error	'test.v1' is not BASE TABLE
-Warnings:
-Error	1347	'test.v1' is not BASE TABLE
+test.v1	repair	Error	'test.v1' is not BASE TABLE
+test.v1	repair	error	Corrupt
 DROP VIEW v1;
 create definer = current_user() sql security invoker view v1 as select 1;
 show create view v1;

mysql-test/t/key_cache.test

@@ -219,4 +219,31 @@ set global key_cache_block_size= @my_key_cache_block_size;
 set @@global.key_buffer_size=0;
 select @@global.key_buffer_size;
 
+#
+# Bug#28478 - Improper key_cache_block_size corrupts MyISAM tables
+#
+SET @bug28478_key_cache_block_size= @@global.key_cache_block_size;
+SET GLOBAL key_cache_block_size= 1536;
+CREATE TABLE t1 (
+  id BIGINT NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  c1 CHAR(150),
+  c2 CHAR(150),
+  c3 CHAR(150),
+  KEY(c1, c2, c3)
+  ) ENGINE= MyISAM;
+INSERT INTO t1 (c1, c2, c3) VALUES
+  ('a', 'b', 'c'), ('b', 'c', 'd'), ('c', 'd', 'e'), ('d', 'e', 'f'),
+  ('e', 'f', 'g'), ('f', 'g', 'h'), ('g', 'h', 'i'), ('h', 'i', 'j'),
+  ('i', 'j', 'k'), ('j', 'k', 'l'), ('k', 'l', 'm'), ('l', 'm', 'n'),
+  ('m', 'n', 'o'), ('n', 'o', 'p'), ('o', 'p', 'q'), ('p', 'q', 'r'),
+  ('q', 'r', 's'), ('r', 's', 't'), ('s', 't', 'u'), ('t', 'u', 'v'),
+  ('u', 'v', 'w'), ('v', 'w', 'x'), ('w', 'x', 'y'), ('x', 'y', 'z');
+INSERT INTO t1 (c1, c2, c3) SELECT c1, c2, c3 from t1;
+INSERT INTO t1 (c1, c2, c3) SELECT c1, c2, c3 from t1;
+INSERT INTO t1 (c1, c2, c3) SELECT c1, c2, c3 from t1;
+CHECK TABLE t1;
+SHOW VARIABLES LIKE 'key_cache_block_size';
+SET GLOBAL key_cache_block_size= @bug28478_key_cache_block_size;
+DROP TABLE t1;
+
 # End of 4.1 tests

mysql-test/t/merge.test

@@ -486,4 +486,25 @@ insert into t1 values (1);
 drop table t2;
 drop table t1;
 
+#
+# BUG#26976 - Missing table in merge not noted in related error msg + SHOW
+#             CREATE TABLE fails
+#
+CREATE TABLE tm1(a INT) ENGINE=MERGE UNION=(t1, t2);
+--error 1168
+SELECT * FROM tm1;
+CHECK TABLE tm1;
+CREATE TABLE t1(a INT);
+--error 1168
+SELECT * FROM tm1;
+CHECK TABLE tm1;
+CREATE TABLE t2(a BLOB);
+--error 1168
+SELECT * FROM tm1;
+CHECK TABLE tm1;
+ALTER TABLE t2 MODIFY a INT;
+SELECT * FROM tm1;
+CHECK TABLE tm1;
+DROP TABLE tm1, t1, t2;
+
 --echo End of 5.0 tests

mysys/mf_keycache.c

@@ -173,7 +173,7 @@ static void test_key_cache(KEY_CACHE *keycache,
 #endif
 
 #define KEYCACHE_HASH(f, pos)                                                 \
-(((ulong) ((pos) >> keycache->key_cache_shift)+                               \
+(((ulong) ((pos) / keycache->key_cache_block_size) +                          \
                                      (ulong) (f)) & (keycache->hash_entries-1))
 #define FILE_HASH(f)                 ((uint) (f) & (CHANGED_BLOCKS_HASH-1))
 
@@ -329,7 +329,6 @@ int init_key_cache(KEY_CACHE *keycache, uint key_cache_block_size,
 
   keycache->key_cache_mem_size= use_mem;
   keycache->key_cache_block_size= key_cache_block_size;
-  keycache->key_cache_shift= my_bit_log2(key_cache_block_size);
   DBUG_PRINT("info", ("key_cache_block_size: %u",
 		      key_cache_block_size));
 
@@ -352,7 +351,7 @@ int init_key_cache(KEY_CACHE *keycache, uint key_cache_block_size,
 		       ALIGN_SIZE(hash_links * sizeof(HASH_LINK)) +
 		       ALIGN_SIZE(sizeof(HASH_LINK*) *
                                   keycache->hash_entries))) +
-	     ((ulong) blocks << keycache->key_cache_shift) > use_mem)
+	     ((ulong) blocks * keycache->key_cache_block_size) > use_mem)
         blocks--;
       /* Allocate memory for cache page buffers */
       if ((keycache->block_mem=
@@ -1807,7 +1806,7 @@ byte *key_cache_read(KEY_CACHE *keycache,
     uint status;
     int page_st;
 
-    offset= (uint) (filepos & (keycache->key_cache_block_size-1));
+    offset= (uint) (filepos % keycache->key_cache_block_size);
     /* Read data in key_cache_block_size increments */
     do
     {
@@ -1946,7 +1945,7 @@ int key_cache_insert(KEY_CACHE *keycache,
     int error;
     uint offset;
 
-    offset= (uint) (filepos & (keycache->key_cache_block_size-1));
+    offset= (uint) (filepos % keycache->key_cache_block_size);
     do
     {
       keycache_pthread_mutex_lock(&keycache->cache_lock);
@@ -2081,7 +2080,7 @@ int key_cache_write(KEY_CACHE *keycache,
     int page_st;
     uint offset;
 
-    offset= (uint) (filepos & (keycache->key_cache_block_size-1));
+    offset= (uint) (filepos % keycache->key_cache_block_size);
     do
     {
       keycache_pthread_mutex_lock(&keycache->cache_lock);

mysys/my_seek.c

@@ -88,6 +88,7 @@ my_off_t my_tell(File fd, myf MyFlags __attribute__((unused)))
   os_off_t pos;
   DBUG_ENTER("my_tell");
   DBUG_PRINT("my",("Fd: %d  MyFlags: %d",fd, MyFlags));
+  DBUG_ASSERT(fd >= 0);
 #ifdef HAVE_TELL
   pos=tell(fd);
 #else

sql/ha_myisam.cc

@@ -109,6 +109,14 @@ static void mi_check_print_msg(MI_CHECK *param,	const char* msg_type,
   }
   length=(uint) (strxmov(name, param->db_name,".",param->table_name,NullS) -
 		 name);
+  /*
+    TODO: switch from protocol to push_warning here. The main reason we didn't
+    it yet is parallel repair. Due to following trace:
+    mi_check_print_msg/push_warning/sql_alloc/my_pthread_getspecific_ptr.
+
+    Also we likely need to lock mutex here (in both cases with protocol and
+    push_warning).
+  */
   protocol->prepare_for_resend();
   protocol->store(name, length, system_charset_info);
   protocol->store(param->op_name, system_charset_info);
@@ -1138,11 +1146,7 @@ int ha_myisam::assign_to_keycache(THD* thd, HA_CHECK_OPT *check_opt)
     /* We only come here when the user did specify an index map */
     key_map kmap;
     if (get_key_map_from_key_list(&kmap, table, table_list->use_index))
-    {
-      errmsg= thd->net.last_error;
-      error= HA_ADMIN_FAILED;
-      goto err;
-    }
+      DBUG_RETURN(HA_ADMIN_FAILED);
     map= kmap.to_ulonglong();
   }
 
@@ -1155,7 +1159,6 @@ int ha_myisam::assign_to_keycache(THD* thd, HA_CHECK_OPT *check_opt)
     error= HA_ADMIN_CORRUPT;
   }
 
- err:
   if (error != HA_ADMIN_OK)
   {
     /* Send error to user */
@@ -1192,11 +1195,7 @@ int ha_myisam::preload_keys(THD* thd, HA_CHECK_OPT *check_opt)
     key_map kmap;
     get_key_map_from_key_list(&kmap, table, table_list->use_index);
     if (kmap.is_set_all())
-    {
-      errmsg= thd->net.last_error;
-      error= HA_ADMIN_FAILED;
-      goto err;
-    }
+      DBUG_RETURN(HA_ADMIN_FAILED);
     if (!kmap.is_clear_all())
       map= kmap.to_ulonglong();
   }

sql/ha_myisammrg.cc

@@ -72,6 +72,13 @@ extern int check_definition(MI_KEYDEF *t1_keyinfo, MI_COLUMNDEF *t1_recinfo,
                             uint t1_keys, uint t1_recs,
                             MI_KEYDEF *t2_keyinfo, MI_COLUMNDEF *t2_recinfo,
                             uint t2_keys, uint t2_recs, bool strict);
+extern "C" void myrg_print_wrong_table(const char *table_name)
+{
+  push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_ERROR,
+                      ER_ADMIN_WRONG_MRG_TABLE, ER(ER_ADMIN_WRONG_MRG_TABLE),
+                      table_name);
+}
+
 
 const char **ha_myisammrg::bas_ext() const
 {
@@ -121,6 +128,8 @@ int ha_myisammrg::open(const char *name, int mode, uint test_if_locked)
   {
     DBUG_PRINT("error",("reclength: %lu  mean_rec_length: %lu",
 			table->s->reclength, mean_rec_length));
+    if (test_if_locked & HA_OPEN_FOR_REPAIR)
+      myrg_print_wrong_table(file->open_tables->table->filename);
     error= HA_ERR_WRONG_MRG_TABLE_DEF;
     goto err;
   }
@@ -139,12 +148,19 @@ int ha_myisammrg::open(const char *name, int mode, uint test_if_locked)
                          u_table->table->s->base.keys,
                          u_table->table->s->base.fields, false))
     {
-      my_free((gptr) recinfo, MYF(0));
       error= HA_ERR_WRONG_MRG_TABLE_DEF;
-      goto err;
+      if (test_if_locked & HA_OPEN_FOR_REPAIR)
+        myrg_print_wrong_table(u_table->table->filename);
+      else
+      {
+        my_free((gptr) recinfo, MYF(0));
+        goto err;
+      }
     }
   }
   my_free((gptr) recinfo, MYF(0));
+  if (error == HA_ERR_WRONG_MRG_TABLE_DEF)
+    goto err;
 #if !defined(BIG_TABLES) || SIZEOF_OFF_T == 4
   /* Merge table has more than 2G rows */
   if (table->s->crashed)
@@ -597,3 +613,9 @@ void ha_myisammrg::append_create_info(String *packet)
   }
   packet->append(')');
 }
+
+
+int ha_myisammrg::check(THD* thd, HA_CHECK_OPT* check_opt)
+{
+  return HA_ADMIN_OK;
+}

sql/ha_myisammrg.h

@@ -81,4 +81,5 @@ class ha_myisammrg: public handler
   void update_create_info(HA_CREATE_INFO *create_info);
   void append_create_info(String *packet);
   MYRG_INFO *myrg_info() { return file; }
+  int check(THD* thd, HA_CHECK_OPT* check_opt);
 };

sql/lock.cc

@@ -178,6 +178,13 @@ MYSQL_LOCK *mysql_lock_tables(THD *thd, TABLE **tables, uint count,
     }
     else if (rc == 1)                           /* aborted */
     {
+      /*
+        reset_lock_data is required here. If thr_multi_lock fails it
+        resets lock type for tables, which were locked before (and
+        including) one that caused error. Lock type for other tables
+        preserved.
+      */
+      reset_lock_data(sql_lock);
       thd->some_tables_deleted=1;		// Try again
       sql_lock->lock_count= 0;                  // Locks are already freed
     }

sql/mysqld.cc

@@ -5827,7 +5827,7 @@ log and this option does nothing anymore.",
    (gptr*) &dflt_key_cache_var.param_block_size,
    (gptr*) 0,
    0, (GET_ULONG | GET_ASK_ADDR), REQUIRED_ARG,
-   KEY_CACHE_BLOCK_SIZE , 512, 1024*16, MALLOC_OVERHEAD, 512, 0},
+   KEY_CACHE_BLOCK_SIZE, 512, 1024 * 16, 0, 512, 0},
   {"key_cache_division_limit", OPT_KEY_CACHE_DIVISION_LIMIT,
    "The minimum percentage of warm blocks in key cache",
    (gptr*) &dflt_key_cache_var.param_division_limit,

sql/share/errmsg.txt

@@ -5633,4 +5633,5 @@ ER_WRONG_STRING_LENGTH
 	eng "String '%-.70s' is too long for %s (should be no longer than %d)"
 ER_NON_INSERTABLE_TABLE  
 	eng "The target table %-.100s of the %s is not insertable-into"
-
+ER_ADMIN_WRONG_MRG_TABLE
+	eng "Table '%-.64s' is differently defined or of non-MyISAM type or doesn't exist"

sql/sql_error.cc

@@ -205,8 +205,8 @@ void push_warning_printf(THD *thd, MYSQL_ERROR::enum_warning_level level,
     TRUE  Error sending data to client
 */
 
-static const char *warning_level_names[]= {"Note", "Warning", "Error", "?"};
-static int warning_level_length[]= { 4, 7, 5, 1 };
+const char *warning_level_names[]= {"Note", "Warning", "Error", "?"};
+int warning_level_length[]= { 4, 7, 5, 1 };
 
 bool mysqld_show_warnings(THD *thd, ulong levels_to_show)
 {  

sql/sql_error.h

@@ -39,3 +39,5 @@ void push_warning_printf(THD *thd, MYSQL_ERROR::enum_warning_level level,
 			 uint code, const char *format, ...);
 void mysql_reset_errors(THD *thd, bool force);
 bool mysqld_show_warnings(THD *thd, ulong levels_to_show);
+extern const char *warning_level_names[];
+extern int warning_level_length[];

sql/sql_table.cc

@@ -2284,33 +2284,16 @@ static bool mysql_admin_table(THD* thd, TABLE_LIST* tables,
     */
     if (!table->table)
     {
-      char buf[ERRMSGSIZE+ERRMSGSIZE+2];
-      const char *err_msg;
-      protocol->prepare_for_resend();
-      protocol->store(table_name, system_charset_info);
-      protocol->store(operator_name, system_charset_info);
-      protocol->store(STRING_WITH_LEN("error"), system_charset_info);
-      if (!(err_msg=thd->net.last_error))
-	err_msg=ER(ER_CHECK_NO_SUCH_TABLE);
+      if (!thd->warn_list.elements)
+        push_warning(thd, MYSQL_ERROR::WARN_LEVEL_ERROR,
+                     ER_CHECK_NO_SUCH_TABLE, ER(ER_CHECK_NO_SUCH_TABLE));
       /* if it was a view will check md5 sum */
       if (table->view &&
           view_checksum(thd, table) == HA_ADMIN_WRONG_CHECKSUM)
-      {
-        strxmov(buf, err_msg, "; ", ER(ER_VIEW_CHECKSUM), NullS);
-        err_msg= (const char *)buf;
-      }
-      protocol->store(err_msg, system_charset_info);
-      lex->cleanup_after_one_table_open();
-      thd->clear_error();
-      /*
-        View opening can be interrupted in the middle of process so some
-        tables can be left opening
-      */
-      close_thread_tables(thd);
-      lex->reset_query_tables_list(FALSE);
-      if (protocol->write())
-	goto err;
-      continue;
+        push_warning(thd, MYSQL_ERROR::WARN_LEVEL_ERROR,
+                     ER_VIEW_CHECKSUM, ER(ER_VIEW_CHECKSUM));
+      result_code= HA_ADMIN_CORRUPT;
+      goto send_result;
     }
 
     if (table->view)
@@ -2392,6 +2375,22 @@ static bool mysql_admin_table(THD* thd, TABLE_LIST* tables,
 
     lex->cleanup_after_one_table_open();
     thd->clear_error();  // these errors shouldn't get client
+    {
+      List_iterator_fast<MYSQL_ERROR> it(thd->warn_list);
+      MYSQL_ERROR *err;
+      while ((err= it++))
+      {
+        protocol->prepare_for_resend();
+        protocol->store(table_name, system_charset_info);
+        protocol->store((char*) operator_name, system_charset_info);
+        protocol->store(warning_level_names[err->level],
+                        warning_level_length[err->level], system_charset_info);
+        protocol->store(err->msg, system_charset_info);
+        if (protocol->write())
+          goto err;
+      }
+      mysql_reset_errors(thd, true);
+    }
     protocol->prepare_for_resend();
     protocol->store(table_name, system_charset_info);
     protocol->store(operator_name, system_charset_info);
@@ -2918,7 +2917,7 @@ bool mysql_check_table(THD* thd, TABLE_LIST* tables,HA_CHECK_OPT* check_opt)
   DBUG_ENTER("mysql_check_table");
   DBUG_RETURN(mysql_admin_table(thd, tables, check_opt,
 				"check", lock_type,
-				0, HA_OPEN_FOR_REPAIR, 0, 0,
+				0, 0, HA_OPEN_FOR_REPAIR, 0,
 				&handler::ha_check, &view_checksum));
 }