Manually merged

mysql-test/r/update.result:
  Auto merged
mysql-test/t/update.test:
  Auto merged
ndb/src/kernel/blocks/backup/Backup.cpp:
  Auto merged
sql/sql_update.cc:
  Auto merged

mysql-test/r/query_cache.result

@@ -1287,3 +1287,28 @@ Variable_name	Value
 Last_query_cost	0.000000
 drop table t1;
 SET GLOBAL query_cache_size=0;
+create table t1 (a int);
+flush status;
+(select a from t1) union (select a from t1);
+a
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	1
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	1
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	0
+(select a from t1) union (select a from t1);
+a
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	1
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	1
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	1
+drop table t1;

mysql-test/r/update.result

@@ -345,3 +345,16 @@ f1
 2000-01-01
 2002-02-02
 drop table t1;
+create table t1 (f1 int);
+create table t2 (f2 int);
+insert into t1 values(1),(2);
+insert into t2 values(1),(1);
+update t1,t2 set f1=3,f2=3 where f1=f2 and f1=1;
+affected rows: 3
+info: Rows matched: 3  Changed: 3  Warnings: 0
+update t2 set f2=1;
+update t1 set f1=1 where f1=3;
+update t2,t1 set f1=3,f2=3 where f1=f2 and f1=1;
+affected rows: 3
+info: Rows matched: 3  Changed: 3  Warnings: 0
+drop table t1,t2;

mysql-test/t/query_cache.test

@@ -743,6 +743,20 @@ show status like "Qcache_hits";
 drop table t1;
 
 #
+# BUG#14652: Queries with leading '(' characters.
+#
+create table t1 (a int);
+flush status;
+(select a from t1) union (select a from t1);
+show status like "Qcache_queries_in_cache";
+show status like "Qcache_inserts";
+show status like "Qcache_hits";
+(select a from t1) union (select a from t1);
+show status like "Qcache_queries_in_cache";
+show status like "Qcache_inserts";
+show status like "Qcache_hits";
+drop table t1;
+
 # SP cursors and selects with query cache (BUG#9715)
 #
 create table t1 (a int);

mysql-test/t/update.test

@@ -270,4 +270,21 @@ insert into t1 values('2000-01-01'),('0000-00-00');
 update t1 set f1='2002-02-02' where f1 is null;
 select * from t1;
 drop table t1;
+
+#
+# Bug#15028 Multitable update returns different numbers of matched rows
+#           depending on table order
+create table t1 (f1 int);
+create table t2 (f2 int);
+insert into t1 values(1),(2);
+insert into t2 values(1),(1);
+--enable_info
+update t1,t2 set f1=3,f2=3 where f1=f2 and f1=1;
+--disable_info
+update t2 set f2=1;
+update t1 set f1=1 where f1=3;
+--enable_info
+update t2,t1 set f1=3,f2=3 where f1=f2 and f1=1;
+--disable_info
+drop table t1,t2;
 # End of 4.1 tests

ndb/src/kernel/blocks/backup/Backup.cpp

@@ -886,13 +886,17 @@ Backup::checkNodeFail(Signal* signal,
       pos= &ref->nodeId - signal->getDataPtr();
       break;
     }
+    case GSN_WAIT_GCP_REQ:
+    case GSN_DROP_TRIG_REQ:
     case GSN_CREATE_TRIG_REQ:
     case GSN_ALTER_TRIG_REQ:
-    case GSN_WAIT_GCP_REQ:
+      ptr.p->setErrorCode(AbortBackupOrd::BackupFailureDueToNodeFail);
+      return;
     case GSN_UTIL_SEQUENCE_REQ:
     case GSN_UTIL_LOCK_REQ:
-    case GSN_DROP_TRIG_REQ:
       return;
+    default:
+      ndbrequire(false);
     }
     
     for(Uint32 i = 0; (i = mask.find(i+1)) != NdbNodeBitmask::NotFound; )
@@ -1903,7 +1907,7 @@ Backup::execBACKUP_FRAGMENT_CONF(Signal* signal)
   const Uint32 nodeId = refToNode(signal->senderBlockRef());
   const Uint32 noOfBytes = conf->noOfBytes;
   const Uint32 noOfRecords = conf->noOfRecords;
-  
+
   BackupRecordPtr ptr;
   c_backupPool.getPtr(ptr, ptrI);
 
@@ -1980,7 +1984,7 @@ Backup::execBACKUP_FRAGMENT_REF(Signal* signal)
       }
     }
   }
-  ndbrequire(false);
+  goto err;
 
 done:
   ptr.p->masterData.sendCounter--;
@@ -1992,7 +1996,8 @@ Backup::execBACKUP_FRAGMENT_REF(Signal* signal)
     masterAbort(signal, ptr);
     return;
   }//if
-  
+
+err:
   AbortBackupOrd *ord = (AbortBackupOrd*)signal->getDataPtrSend();
   ord->backupId = ptr.p->backupId;
   ord->backupPtr = ptr.i;

sql/sql_cache.cc

@@ -990,8 +990,25 @@ Query_cache::send_result_to_client(THD *thd, char *sql, uint query_length)
        my_toupper(system_charset_info,sql[2]) !='L') &&
       sql[0] != '/')
   {
-    DBUG_PRINT("qcache", ("The statement is not a SELECT; Not cached"));
-    goto err;
+    uint i= 0;
+    /*
+      Skip '(' characters in queries like following:
+      (select a from t1) union (select a from t1);
+    */
+    while (sql[i]=='(')
+      i++;
+
+    /*
+      Test if the query is a SELECT
+      (pre-space is removed in dispatch_command)
+    */
+    if (my_toupper(system_charset_info, sql[i])     != 'S' ||
+        my_toupper(system_charset_info, sql[i + 1]) != 'E' ||
+        my_toupper(system_charset_info, sql[i + 2]) != 'L')
+    {
+      DBUG_PRINT("qcache", ("The statement is not a SELECT; Not cached"));
+      goto err;
+    }
   }
 
   STRUCT_LOCK(&structure_guard_mutex);

sql/sql_update.cc

@@ -1290,22 +1290,23 @@ bool multi_update::send_data(List<Item> &not_used_values)
       int error;
       TABLE *tmp_table= tmp_tables[offset];
       fill_record(thd, tmp_table->field+1, *values_for_table[offset], 1);
-      found++;
       /* Store pointer to row */
       memcpy((char*) tmp_table->field[0]->ptr,
 	     (char*) table->file->ref, table->file->ref_length);
       /* Write row, ignoring duplicated updates to a row */
-      if ((error= tmp_table->file->write_row(tmp_table->record[0])) &&
-	  (error != HA_ERR_FOUND_DUPP_KEY &&
-	   error != HA_ERR_FOUND_DUPP_UNIQUE))
+      if (error= tmp_table->file->write_row(tmp_table->record[0]))
       {
-	if (create_myisam_from_heap(thd, tmp_table, tmp_table_param + offset,
-				    error, 1))
+        if (error != HA_ERR_FOUND_DUPP_KEY &&
+            error != HA_ERR_FOUND_DUPP_UNIQUE &&
+            create_myisam_from_heap(thd, tmp_table,
+                                         tmp_table_param + offset, error, 1))
 	{
 	  do_update=0;
 	  DBUG_RETURN(1);			// Not a table_is_full error
 	}
       }
+      else
+        found++;
     }
   }
   DBUG_RETURN(0);