Merge bk-internal.mysql.com:/home/bk/mysql-5.0

into mysql.com:/home/dlenev/src/mysql-5.0-bg9566

mysql-test/r/sp.result

@@ -2779,4 +2779,14 @@ a
 3.2000
 drop procedure bug8937|
 delete from t1|
+drop procedure if exists bug9566|
+create procedure bug9566()
+begin
+select * from t1;
+end|
+lock table t1 read|
+call bug9566()|
+ERROR HY000: Table 'proc' was not locked with LOCK TABLES
+unlock tables|
+drop procedure bug9566|
 drop table t1,t2;

mysql-test/t/sp.test

@@ -3397,6 +3397,29 @@ call bug8937()|
 drop procedure bug8937|
 delete from t1|
 
+#
+# BUG#9566: explicit LOCK TABLE and store procedures result in illegal state
+#
+# We should not think that mysql.proc table does not exist if we are unable
+# to open it under LOCK TABLE or in prelocked mode. Probably this test
+# should be removed when Monty will allow access to mysql.proc without
+# locking it.
+#
+--disable_warnings
+drop procedure if exists bug9566|
+--enable_warnings
+create procedure bug9566()
+begin
+  select * from t1;
+end|
+lock table t1 read|
+# This should fail because we forgot to lock mysql.proc table explicitly
+--error 1100
+call bug9566()|
+unlock tables|
+# This should succeed
+drop procedure bug9566|
+
 
 #
 # BUG#NNNN: New bug synopsis

sql/sp.cc

@@ -70,9 +70,8 @@ db_find_routine_aux(THD *thd, int type, sp_name *name,
 		       type, name->m_name.length, name->m_name.str));
 
   /*
-    Speed up things if mysql.proc doesn't exists
+    Speed up things if mysql.proc doesn't exists. mysql_proc_table_exists
-    mysql_proc_table_exists is set when on creates a stored procedure
+    is set when we create or read stored procedure or on flush privileges.
-    or on flush privileges
   */
   if (!mysql_proc_table_exists && ltype == TL_READ)
     DBUG_RETURN(SP_OPEN_TABLE_FAILED);
@@ -98,7 +97,13 @@ db_find_routine_aux(THD *thd, int type, sp_name *name,
     if (! (table= open_ltable(thd, &tables, ltype)))
     {
       *tablep= NULL;
-      mysql_proc_table_exists= 0;
+      /*
+        Under explicit LOCK TABLES or in prelocked mode we should not
+        say that mysql.proc table does not exist if we are unable to
+        open it since this condition may be transient.
+      */
+      if (!(thd->locked_tables || thd->prelocked_mode))
+        mysql_proc_table_exists= 0;
       DBUG_RETURN(SP_OPEN_TABLE_FAILED);
     }
     *opened= TRUE;