Merge mockturtle.local:/home/dlenev/src/mysql-5.0-bg20390-2

into  mockturtle.local:/home/dlenev/src/mysql-5.1-bg20390


mysql-test/t/ndb_lock.test:
  Auto merged
sql/sql_select.cc:
  Auto merged
mysql-test/r/ndb_lock.result:
  Manual merge.

mysql-test/r/ndb_lock.result

@@ -87,11 +87,27 @@ x	y	z
 rollback;
 commit;
 begin;
+select * from t1 where y = 'one' or y = 'three' for update;
+x	y	z
+#	#	#
+#	#	#
+begin;
+select * from t1 where x = 2 for update;
+x	y	z
+2	two	2
+select * from t1 where x = 1 for update;
+ERROR HY000: Lock wait timeout exceeded; try restarting transaction
+rollback;
+commit;
+begin;
 select * from t1 where y = 'one' or y = 'three' order by x for update;
 x	y	z
 1	one	1
 3	three	3
 begin;
+select * from t1 where x = 2 for update;
+x	y	z
+2	two	2
 select * from t1 where x = 1 for update;
 ERROR HY000: Lock wait timeout exceeded; try restarting transaction
 rollback;
@@ -124,6 +140,22 @@ ERROR HY000: Lock wait timeout exceeded; try restarting transaction
 rollback;
 commit;
 begin;
+select * from t1 where y = 'one' or y = 'three' lock in share mode;
+x	y	z
+#	#	#
+#	#	#
+begin;
+select * from t1 where y = 'one' lock in share mode;
+x	y	z
+1	one	1
+select * from t1 where x = 2 for update;
+x	y	z
+2	two	2
+select * from t1 where x = 1 for update;
+ERROR HY000: Lock wait timeout exceeded; try restarting transaction
+rollback;
+commit;
+begin;
 select * from t1 where y = 'one' or y = 'three' order by x lock in share mode;
 x	y	z
 1	one	1
@@ -132,6 +164,9 @@ begin;
 select * from t1 where y = 'one' lock in share mode;
 x	y	z
 1	one	1
+select * from t1 where x = 2 for update;
+x	y	z
+2	two	2
 select * from t1 where x = 1 for update;
 ERROR HY000: Lock wait timeout exceeded; try restarting transaction
 rollback;

mysql-test/t/ndb_lock.test

@@ -102,16 +102,36 @@ connection con1;
 commit;
 
 # table scan
+#
+# Note that there are two distinct execution paths in which we unlock
+# non-matching rows inspected during table scan - one that is used in
+# case of filesort and one that used in rest of cases. Below we cover
+# the latter (Bug #20390 "SELECT FOR UPDATE does not release locks of
+# untouched rows in full table scans").
 connection con1;
 begin;
-select * from t1 where y = 'one' or y = 'three' order by x for update;
+# We can't use "order by x" here as it will cause filesort
+--replace_column 1 # 2 # 3 #
+select * from t1 where y = 'one' or y = 'three' for update;
 
 connection con2;
 begin;
 # Have to check with pk access here since scans take locks on
 # all rows and then release them in chunks
-# Bug #20390 SELECT FOR UPDATE does not release locks of untouched rows in full table scans
-#select * from t1 where x = 2 for update;
+select * from t1 where x = 2 for update;
+--error 1205
+select * from t1 where x = 1 for update;
+rollback;
+
+connection con1;
+commit;
+
+# And now the test for case with filesort
+begin;
+select * from t1 where y = 'one' or y = 'three' order by x for update;
+connection con2;
+begin;
+select * from t1 where x = 2 for update;
 --error 1205
 select * from t1 where x = 1 for update;
 rollback;
@@ -157,15 +177,32 @@ commit;
 # table scan
 connection con1;
 begin;
-select * from t1 where y = 'one' or y = 'three' order by x lock in share mode;
+# We can't use "order by x" here as it will cause filesort
+--replace_column 1 # 2 # 3 #
+select * from t1 where y = 'one' or y = 'three' lock in share mode;
 
 connection con2;
 begin;
 select * from t1 where y = 'one' lock in share mode;
 # Have to check with pk access here since scans take locks on
 # all rows and then release them in chunks
-# Bug #20390 SELECT FOR UPDATE does not release locks of untouched rows in full table scans
-#select * from t1 where x = 2 for update;
+select * from t1 where x = 2 for update;
+--error 1205
+select * from t1 where x = 1 for update;
+rollback;
+
+connection con1;
+commit;
+
+# And the same test for case with filesort
+connection con1;
+begin;
+select * from t1 where y = 'one' or y = 'three' order by x lock in share mode;
+
+connection con2;
+begin;
+select * from t1 where y = 'one' lock in share mode;
+select * from t1 where x = 2 for update;
 --error 1205
 select * from t1 where x = 1 for update;
 rollback;

sql/sql_select.cc

@@ -10646,6 +10646,7 @@ evaluate_join_record(JOIN *join, JOIN_TAB *join_tab,
     */
     join->examined_rows++;
     join->thd->row_count++;
+    join_tab->read_record.file->unlock_row();
   }
   return NESTED_LOOP_OK;
 }