1 files changed, 19 insertions, 69 deletions

diff --git a/sql/sp.cc b/sql/sp.cc
index 0c0bc8e8869..4eea35eeafb 100644
--- a/sql/sp.cc
+++ b/sql/sp.cc
@@ -69,24 +69,6 @@ enum
 
 
 /*
-  Close mysql.proc, opened with open_proc_table_for_read().
-
-  SYNOPSIS
-    close_proc_table()
-      thd     Thread context
-      backup  Pointer to Open_tables_state instance which holds
-              information about tables which were open before we
-              decided to access mysql.proc.
-*/
-
-void close_proc_table(THD *thd, Open_tables_state *backup)
-{
-  close_thread_tables(thd);
-  thd->restore_backup_open_tables_state(backup);
-}
-
-
-/*
   Open the mysql.proc table for read.
 
   SYNOPSIS
@@ -96,13 +78,6 @@ void close_proc_table(THD *thd, Open_tables_state *backup)
               currently open tables will be saved, and from which will be
               restored when we will end work with mysql.proc.
 
-  NOTES
-    Thanks to restrictions which we put on opening and locking of
-    this table for writing, we can open and lock it for reading
-    even when we already have some other tables open and locked.
-    One must call close_proc_table() to close table opened with
-    this call.
-
   RETURN
     0	Error
     #	Pointer to TABLE object of mysql.proc
@@ -110,38 +85,18 @@ void close_proc_table(THD *thd, Open_tables_state *backup)
 
 TABLE *open_proc_table_for_read(THD *thd, Open_tables_state *backup)
 {
-  TABLE_LIST tables;
-  TABLE *table;
-  bool not_used;
-  DBUG_ENTER("open_proc_table");
-
-  thd->reset_n_backup_open_tables_state(backup);
-
-  bzero((char*) &tables, sizeof(tables));
-  tables.db= (char*) "mysql";
-  tables.table_name= tables.alias= (char*)"proc";
-  if (!(table= open_table(thd, &tables, thd->mem_root, &not_used,
-                          MYSQL_LOCK_IGNORE_FLUSH)))
-  {
-    thd->restore_backup_open_tables_state(backup);
-    DBUG_RETURN(0);
-  }
-  table->use_all_columns();
+  DBUG_ENTER("open_proc_table_for_read");
 
-  DBUG_ASSERT(table->s->system_table);
+  TABLE_LIST table;
+  bzero((char*) &table, sizeof(table));
+  table.db= (char*) "mysql";
+  table.table_name= table.alias= (char*)"proc";
+  table.lock_type= TL_READ;
 
-  table->reginfo.lock_type= TL_READ;
-  /*
-    We have to ensure we are not blocked by a flush tables, as this
-    could lead to a deadlock if we have other tables opened.
-  */
-  if (!(thd->lock= mysql_lock_tables(thd, &table, 1,
-                                     MYSQL_LOCK_IGNORE_FLUSH, &not_used)))
-  {
-    close_proc_table(thd, backup);
+  if (!open_system_tables_for_read(thd, &table, backup))
+    DBUG_RETURN(table.table);
+  else
     DBUG_RETURN(0);
-  }
-  DBUG_RETURN(table);
 }
 
 
@@ -162,20 +117,15 @@ TABLE *open_proc_table_for_read(THD *thd, Open_tables_state *backup)
 
 static TABLE *open_proc_table_for_update(THD *thd)
 {
-  TABLE_LIST tables;
-  TABLE *table;
-  DBUG_ENTER("open_proc_table");
-
-  bzero((char*) &tables, sizeof(tables));
-  tables.db= (char*) "mysql";
-  tables.table_name= tables.alias= (char*)"proc";
-  tables.lock_type= TL_WRITE;
+  DBUG_ENTER("open_proc_table_for_update");
 
-  table= open_ltable(thd, &tables, TL_WRITE);
-  if (table)
-    table->use_all_columns();
+  TABLE_LIST table;
+  bzero((char*) &table, sizeof(table));
+  table.db= (char*) "mysql";
+  table.table_name= table.alias= (char*)"proc";
+  table.lock_type= TL_WRITE;
 
-  DBUG_RETURN(table);
+  DBUG_RETURN(open_system_table_for_update(thd, &table));
 }
 
 
@@ -364,7 +314,7 @@ db_find_routine(THD *thd, int type, sp_name *name, sp_head **sphp)
   chistics.comment.str= ptr;
   chistics.comment.length= length;
 
-  close_proc_table(thd, &open_tables_state_backup);
+  close_system_tables(thd, &open_tables_state_backup);
   table= 0;
 
   ret= db_load_routine(thd, type, name, sphp,
@@ -373,7 +323,7 @@ db_find_routine(THD *thd, int type, sp_name *name, sp_head **sphp)
                        
  done:
   if (table)
-    close_proc_table(thd, &open_tables_state_backup);
+    close_system_tables(thd, &open_tables_state_backup);
   DBUG_RETURN(ret);
 }
 
@@ -1147,7 +1097,7 @@ sp_routine_exists_in_table(THD *thd, int type, sp_name *name)
   {
     if ((ret= db_find_routine_aux(thd, type, name, table)) != SP_OK)
       ret= SP_KEY_NOT_FOUND;
-    close_proc_table(thd, &open_tables_state_backup);
+    close_system_tables(thd, &open_tables_state_backup);
   }
   return ret;
 }