BUG#26976 - Missing table in merge not noted in related error msg +

            SHOW CREATE TABLE fails

Underlying table names, that merge engine fails to open were not
reported.

With this fix CHECK TABLE issued against merge table reports all
underlying table names that it fails to open. Other statements
are unaffected, that is underlying table names are not included
into error message.

This fix doesn't solve SHOW CREATE TABLE issue.

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

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/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

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/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

@@ -2283,33 +2283,16 @@ 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)
@@ -2391,6 +2374,22 @@ send_result:
 
     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);
@@ -2924,7 +2923,7 @@ 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));
 }