merged

sql/item_subselect.cc:
  Auto merged
sql/mysqld.cc:
  Auto merged
sql/sql_lex.cc:
  Auto merged
sql/sql_lex.h:
  Auto merged
sql/sql_select.cc:
  Auto merged

mysql-test/r/subselect.result

@@ -1153,6 +1153,19 @@ INSERT INTO t1 VALUES (1,0,NULL,NULL),(2,0,NULL,NULL);
 SELECT DISTINCT REF_ID FROM t1 WHERE ID= (SELECT DISTINCT REF_ID FROM t1 WHERE ID=2);
 REF_ID
 DROP TABLE t1;
+create table t1 (a int, b int);
+create table t2 (a int, b int);
+insert into t1 values (1,0), (2,0), (3,0);
+insert into t2 values (1,1), (2,1), (3,1), (2,2);
+update ignore t1 set b=(select b from t2 where t1.a=t2.a);
+Warnings:
+Error	1240	Subselect returns more than 1 record
+select * from t1;
+a	b
+1	1
+2	NULL
+3	1
+drop table t1, t2;
 create table t1(City VARCHAR(30),Location geometry);
 insert into t1 values("Paris",GeomFromText('POINT(2.33 48.87)'));
 select City from t1 where (select intersects(GeomFromText(AsText(Location)),GeomFromText('Polygon((2 50, 2.5 50, 2.5 47, 2 47, 2 50))'))=0);

mysql-test/t/subselect.test

@@ -739,6 +739,19 @@ INSERT INTO t1 VALUES (1,0,NULL,NULL),(2,0,NULL,NULL);
 SELECT DISTINCT REF_ID FROM t1 WHERE ID= (SELECT DISTINCT REF_ID FROM t1 WHERE ID=2);
 DROP TABLE t1;
 
+#
+# uninterruptable update
+#
+create table t1 (a int, b int);
+create table t2 (a int, b int);
+
+insert into t1 values (1,0), (2,0), (3,0);
+insert into t2 values (1,1), (2,1), (3,1), (2,2);
+
+update ignore t1 set b=(select b from t2 where t1.a=t2.a);
+select * from t1;
+
+drop table t1, t2;
 
 #
 # correct behavoiur for function from reduced subselect

sql/mysqld.cc

@@ -1818,15 +1818,23 @@ extern "C" int my_message_sql(uint error, const char *str,
 {
   THD *thd;
   DBUG_ENTER("my_message_sql");
-  DBUG_PRINT("error",("Message: '%s'",str));
-  if ((thd=current_thd))
+  DBUG_PRINT("error", ("Message: '%s'", str));
+  if ((thd= current_thd))
   {
-    NET *net= &thd->net;
-    net->report_error= 1;
-    if (!net->last_error[0])			// Return only first message
+    if (thd->lex.current_select->no_error && !thd->is_fatal_error)
     {
-      strmake(net->last_error,str,sizeof(net->last_error)-1);
-      net->last_errno=error ? error : ER_UNKNOWN_ERROR;
+      DBUG_PRINT("error", ("above error converted to warning"));
+      push_warning(thd, MYSQL_ERROR::WARN_LEVEL_ERROR, error, str);
+    }
+    else
+    {
+      NET *net= &thd->net;
+      net->report_error= 1;
+      if (!net->last_error[0])			// Return only first message
+      {
+	strmake(net->last_error, str, sizeof(net->last_error)-1);
+	net->last_errno= error ? error : ER_UNKNOWN_ERROR;
+      }
     }
   }
   else

sql/sql_lex.cc

@@ -122,6 +122,7 @@ LEX *lex_start(THD *thd, uchar *buf,uint length)
   lex->yacc_yyss=lex->yacc_yyvs=0;
   lex->ignore_space=test(thd->variables.sql_mode & MODE_IGNORE_SPACE);
   lex->sql_command=SQLCOM_END;
+  lex->duplicates= DUP_ERROR;
   return lex;
 }
 
@@ -965,7 +966,7 @@ void st_select_lex_node::init_query()
 {
   options= 0;
   linkage= UNSPECIFIED_TYPE;
-  no_table_names_allowed= uncacheable= dependent= 0;
+  no_error= no_table_names_allowed= uncacheable= dependent= 0;
   ref_pointer_array= 0;
   cond_count= 0;
 }

sql/sql_lex.h

@@ -213,6 +213,7 @@ class st_select_lex_node {
   bool dependent;	/* dependent from outer select subselect */
   bool uncacheable;     /* result of this query can't be cached */
   bool no_table_names_allowed; /* used for global order by */
+  bool no_error; /* suppress error message (convert it to warnings) */
 
   static void *operator new(size_t size)
   {

sql/sql_select.cc

@@ -436,6 +436,9 @@ JOIN::optimize()
     DBUG_RETURN(0);
   optimized= 1;
 
+  // Ignore errors of execution if option IGNORE present
+  if (thd->lex.duplicates == DUP_IGNORE)
+    thd->lex.current_select->no_error= 1;
 #ifdef HAVE_REF_TO_FIELDS			// Not done yet
   /* Add HAVING to WHERE if possible */
   if (having && !group_list && !sum_func_count)