BUG#12618: Removing fake locking

mysql-test/r/rpl_multi_update3.result

@@ -122,3 +122,75 @@ SELECT * FROM t1;
 i	j	x	y	z
 1	2	23	24	71
 DROP TABLE t1, t2, t3;
+DROP TABLE IF EXISTS t1;
+Warnings:
+Note	1051	Unknown table 't1'
+DROP TABLE IF EXISTS t2;
+Warnings:
+Note	1051	Unknown table 't2'
+CREATE TABLE t1 (
+idp int(11) NOT NULL default '0',
+idpro int(11) default NULL,
+price decimal(19,4) default NULL,
+PRIMARY KEY (idp)
+);
+CREATE TABLE t2 (
+idpro int(11) NOT NULL default '0',
+price decimal(19,4) default NULL,
+nbprice int(11) default NULL,
+PRIMARY KEY (idpro)
+);
+INSERT INTO t1 VALUES 
+(1,1,'3.0000'),
+(2,2,'1.0000'),
+(3,1,'1.0000'),
+(4,1,'4.0000'),
+(5,3,'2.0000'),
+(6,2,'4.0000');
+INSERT INTO t2 VALUES 
+(1,'0.0000',0),
+(2,'0.0000',0),
+(3,'0.0000',0);
+update 
+t2
+join 
+( select    idpro, min(price) as min_price, count(*) as nbr_price
+from      t1 
+where     idpro>0 and price>0 
+group by  idpro
+) as table_price
+on   t2.idpro = table_price.idpro 
+set  t2.price = table_price.min_price, 
+t2.nbprice = table_price.nbr_price;
+select "-- MASTER AFTER JOIN --" as "";
+
+-- MASTER AFTER JOIN --
+select * from t1;
+idp	idpro	price
+1	1	3.0000
+2	2	1.0000
+3	1	1.0000
+4	1	4.0000
+5	3	2.0000
+6	2	4.0000
+select * from t2;
+idpro	price	nbprice
+1	1.0000	3
+2	1.0000	2
+3	2.0000	1
+select "-- SLAVE AFTER JOIN --" as "";
+
+-- SLAVE AFTER JOIN --
+select * from t1;
+idp	idpro	price
+1	1	3.0000
+2	2	1.0000
+3	1	1.0000
+4	1	4.0000
+5	3	2.0000
+6	2	4.0000
+select * from t2;
+idpro	price	nbprice
+1	1.0000	3
+2	1.0000	2
+3	2.0000	1

mysql-test/t/rpl_multi_update3.test

@@ -158,4 +158,63 @@ SELECT * FROM t1;
 connection master;
 DROP TABLE t1, t2, t3;
 
+##############################################################################
+#
+# BUG#12618
+#
+# TEST: Replication of a statement containing a join in a multi-update.
+
+DROP TABLE IF EXISTS t1;
+DROP TABLE IF EXISTS t2;
+
+CREATE TABLE t1 (
+  idp int(11) NOT NULL default '0',
+  idpro int(11) default NULL,
+  price decimal(19,4) default NULL,
+  PRIMARY KEY (idp)
+);
+
+CREATE TABLE t2 (
+  idpro int(11) NOT NULL default '0',
+  price decimal(19,4) default NULL,
+  nbprice int(11) default NULL,
+  PRIMARY KEY (idpro)
+);
+
+INSERT INTO t1 VALUES 
+  (1,1,'3.0000'),
+  (2,2,'1.0000'),
+  (3,1,'1.0000'),
+  (4,1,'4.0000'),
+  (5,3,'2.0000'),
+  (6,2,'4.0000');
+
+INSERT INTO t2 VALUES 
+  (1,'0.0000',0),
+  (2,'0.0000',0),
+  (3,'0.0000',0);
+
+# This update sets t2 to the minimal prices for each product
+update 
+  t2
+    join 
+  ( select    idpro, min(price) as min_price, count(*) as nbr_price
+    from      t1 
+    where     idpro>0 and price>0 
+    group by  idpro
+  ) as table_price
+on   t2.idpro = table_price.idpro 
+set  t2.price = table_price.min_price, 
+     t2.nbprice = table_price.nbr_price;
+
+select "-- MASTER AFTER JOIN --" as "";
+select * from t1;
+select * from t2;
+
+sync_slave_with_master;
+
+select "-- SLAVE AFTER JOIN --" as "";
+select * from t1;
+select * from t2;
+
 # End of 4.1 tests

sql/sql_parse.cc

@@ -1941,8 +1941,6 @@ mysql_execute_command(THD *thd)
 {
   int	res= 0;
   LEX	*lex= thd->lex;
-  bool slave_fake_lock= 0;
-  MYSQL_LOCK *fake_prev_lock= 0;
   SELECT_LEX *select_lex= &lex->select_lex;
   TABLE_LIST *tables= (TABLE_LIST*) select_lex->table_list.first;
   SELECT_LEX_UNIT *unit= &lex->unit;
@@ -1971,35 +1969,21 @@ mysql_execute_command(THD *thd)
 #ifdef HAVE_REPLICATION
   if (thd->slave_thread)
   {
-    if (lex->sql_command == SQLCOM_UPDATE_MULTI)
-    {
-      DBUG_PRINT("info",("need faked locked tables"));
-      
-      if (check_multi_update_lock(thd, tables, &select_lex->item_list,
-				  select_lex))
-        goto error;
-
-      /* Fix for replication, the tables are opened and locked,
-         now we pretend that we have performed a LOCK TABLES action */
-	 
-      fake_prev_lock= thd->locked_tables;
-      if (thd->lock)
-        thd->locked_tables= thd->lock;
-      thd->lock= 0;
-      slave_fake_lock= 1;
-    }
     /*
-      Skip if we are in the slave thread, some table rules have been
-      given and the table list says the query should not be replicated.
+      Check if statment should be skipped because of slave filtering
+      rules
 
       Exceptions are:
+      - UPDATE MULTI: For this statement, we want to check the filtering
+        rules later in the code
       - SET: we always execute it (Not that many SET commands exists in
         the binary log anyway -- only 4.1 masters write SET statements,
 	in 5.0 there are no SET statements in the binary log)
       - DROP TEMPORARY TABLE IF EXISTS: we always execute it (otherwise we
         have stale files on slave caused by exclusion of one tmp table).
     */
-    if (!(lex->sql_command == SQLCOM_SET_OPTION) &&
+    if (!(lex->sql_command == SQLCOM_UPDATE_MULTI) &&
+	!(lex->sql_command == SQLCOM_SET_OPTION) &&
 	!(lex->sql_command == SQLCOM_DROP_TABLE &&
           lex->drop_temporary && lex->drop_if_exists) &&
         all_tables_not_ok(thd,tables))
@@ -2852,6 +2836,20 @@ mysql_execute_command(THD *thd)
   {
     if ((res= multi_update_precheck(thd, tables)))
       break;
+
+    if ((res= mysql_multi_update_lock(thd, tables, &select_lex->item_list,
+				      select_lex)))
+      break;
+
+    /* Check slave filtering rules */
+    if (thd->slave_thread)
+      if (all_tables_not_ok(thd,tables))
+      {
+	/* we warn the slave SQL thread */
+	my_error(ER_SLAVE_IGNORED_TABLE, MYF(0));
+	break;
+      }
+
     res= mysql_multi_update(thd,tables,
 			    &select_lex->item_list,
 			    &lex->value_list,
@@ -3764,14 +3762,6 @@ purposes internal to the MySQL server", MYF(0));
     send_error(thd,thd->killed ? ER_SERVER_SHUTDOWN : 0);
 
 error:
-  if (unlikely(slave_fake_lock))
-  {
-    DBUG_PRINT("info",("undoing faked lock"));
-    thd->lock= thd->locked_tables;
-    thd->locked_tables= fake_prev_lock;
-    if (thd->lock == thd->locked_tables)
-      thd->lock= 0;
-  }
   DBUG_VOID_RETURN;
 }
 
@@ -5303,58 +5293,6 @@ bool check_simple_select()
   return 0;
 }
 
-/*
-  Setup locking for multi-table updates. Used by the replication slave.
-  Replication slave SQL thread examines (all_tables_not_ok()) the
-  locking state of referenced tables to determine if the query has to
-  be executed or ignored. Since in multi-table update, the 
-  'default' lock is read-only, this lock is corrected early enough by
-  calling this function, before the slave decides to execute/ignore.
-
-  SYNOPSIS
-    check_multi_update_lock()
-    thd		Current thread
-    tables	List of user-supplied tables
-    fields	List of fields requiring update
-
-  RETURN VALUES
-    0	ok
-    1	error
-*/
-static bool check_multi_update_lock(THD *thd, TABLE_LIST *tables, 
-				    List<Item> *fields, SELECT_LEX *select_lex)
-{
-  bool res= 1;
-  TABLE_LIST *table;
-  DBUG_ENTER("check_multi_update_lock");
-  
-  if (check_db_used(thd, tables))
-    goto error;
-
-  /*
-    Ensure that we have UPDATE or SELECT privilege for each table
-    The exact privilege is checked in mysql_multi_update()
-  */
-  for (table= tables ; table ; table= table->next)
-  {
-    TABLE_LIST *save= table->next;
-    table->next= 0;
-    if ((check_access(thd, UPDATE_ACL, table->db, &table->grant.privilege,0,1) ||
-        (grant_option && check_grant(thd, UPDATE_ACL, table,0,1,1))) &&
-	check_one_table_access(thd, SELECT_ACL, table))
-	goto error;
-    table->next= save;
-  }
-    
-  if (mysql_multi_update_lock(thd, tables, fields, select_lex))
-    goto error;
-  
-  res= 0;
-  
-error:
-  DBUG_RETURN(res);
-}
-
 
 Comp_creator *comp_eq_creator(bool invert)
 {

sql/sql_update.cc

@@ -672,9 +672,6 @@ int mysql_multi_update(THD *thd,
   multi_update *result;
   DBUG_ENTER("mysql_multi_update");
 
-  if ((res= mysql_multi_update_lock(thd, table_list, fields, select_lex)))
-    DBUG_RETURN(res);
-
   /* Setup timestamp handling */
   for (tl= update_list; tl; tl= tl->next)
   {