Merge macbook.gmz:/Users/kgeorge/mysql/work/B14553-4.1-opt

into  macbook.gmz:/Users/kgeorge/mysql/work/B14553-5.0-opt

mysql-test/r/odbc.result

@@ -14,3 +14,14 @@ explain select * from t1 where b is null;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
 drop table t1;
+CREATE TABLE t1 (a INT AUTO_INCREMENT PRIMARY KEY);
+INSERT INTO t1 VALUES (NULL);
+SELECT sql_no_cache a, last_insert_id() FROM t1 WHERE a IS NULL;
+a	last_insert_id()
+1	1
+SELECT sql_no_cache a, last_insert_id() FROM t1 WHERE a IS NULL;
+a	last_insert_id()
+SELECT sql_no_cache a, last_insert_id() FROM t1;
+a	last_insert_id()
+1	1
+DROP TABLE t1;

mysql-test/r/rpl_insert_id.result

@@ -73,7 +73,20 @@ CREATE TABLE t1 ( a INT UNIQUE );
 SET FOREIGN_KEY_CHECKS=0;
 INSERT INTO t1 VALUES (1),(1);
 ERROR 23000: Duplicate entry '1' for key 1
+drop table if exists t1, t2;
+create table t1(a int auto_increment, key(a));
+create table t2(a int);
+insert into t1 (a) values (null);
+insert into t2 (a) select a from t1 where a is null;
+insert into t2 (a) select a from t1 where a is null;
+select * from t2;
+a
+1
+select * from t2;
+a
+1
 drop table t1;
+drop table t2;
 drop function if exists bug15728;
 drop function if exists bug15728_insert;
 drop table if exists t1, t2;

mysql-test/t/odbc.test

@@ -21,4 +21,14 @@ select * from t1 where a is null;
 explain select * from t1 where b is null;
 drop table t1;
 
+#
+# Bug #14553: NULL in WHERE resets LAST_INSERT_ID
+#
+CREATE TABLE t1 (a INT AUTO_INCREMENT PRIMARY KEY);
+INSERT INTO t1 VALUES (NULL);
+SELECT sql_no_cache a, last_insert_id() FROM t1 WHERE a IS NULL;
+SELECT sql_no_cache a, last_insert_id() FROM t1 WHERE a IS NULL;
+SELECT sql_no_cache a, last_insert_id() FROM t1;
+DROP TABLE t1;
+
 # End of 4.1 tests

mysql-test/t/rpl_insert_id.test

@@ -77,6 +77,25 @@ sync_slave_with_master;
 connection master;
 drop table t1;
 sync_slave_with_master;
+ 
+#
+# Bug#14553: NULL in WHERE resets LAST_INSERT_ID
+#
+connection master;
+drop table if exists t1,t2;
+create table t1(a int auto_increment, key(a));
+create table t2(a int);
+insert into t1 (a) values (null);
+insert into t2 (a) select a from t1 where a is null;
+insert into t2 (a) select a from t1 where a is null;
+select * from t2;
+sync_slave_with_master;
+connection slave;
+select * from t2;
+connection master;
+drop table t1;
+drop table t2;
+sync_slave_with_master;
 # End of 4.1 tests
 
 

sql/sql_class.cc

@@ -269,6 +269,7 @@ THD::THD()
   tablespace_op=FALSE;
   ulong tmp=sql_rnd_with_mutex();
   randominit(&rand, tmp + (ulong) &rand, tmp + (ulong) ::query_id);
+  substitute_null_with_insert_id = FALSE;
   thr_lock_info_init(&lock_info); /* safety: will be reset after start */
   thr_lock_owner_init(&main_lock_id, &lock_info);
 }

sql/sql_class.h

@@ -1321,6 +1321,8 @@ class THD :public Statement,
   bool	     no_errors, password, is_fatal_error;
   bool	     query_start_used, rand_used, time_zone_used;
   bool	     last_insert_id_used,insert_id_used, clear_next_insert_id;
+  /* for IS NULL => = last_insert_id() fix in remove_eq_conds() */
+  bool       substitute_null_with_insert_id;
   bool	     in_lock_tables;
   bool       query_error, bootstrap, cleanup_done;
   bool	     tmp_table_used;
@@ -1452,6 +1454,7 @@ class THD :public Statement,
   {
     last_insert_id= id_arg;
     insert_id_used=1;
+    substitute_null_with_insert_id= TRUE;
   }
   inline ulonglong insert_id(void)
   {

sql/sql_select.cc

@@ -7854,7 +7854,7 @@ remove_eq_conds(THD *thd, COND *cond, Item::cond_result *cond_value)
       Field *field=((Item_field*) args[0])->field;
       if (field->flags & AUTO_INCREMENT_FLAG && !field->table->maybe_null &&
 	  (thd->options & OPTION_AUTO_IS_NULL) &&
-	  thd->insert_id())
+	  thd->insert_id() && thd->substitute_null_with_insert_id)
       {
 #ifdef HAVE_QUERY_CACHE
 	query_cache_abort(&thd->net);
@@ -7873,7 +7873,7 @@ remove_eq_conds(THD *thd, COND *cond, Item::cond_result *cond_value)
           */
 	  cond->fix_fields(thd, &cond);
 	}
-	thd->insert_id(0);		// Clear for next request
+	thd->substitute_null_with_insert_id= FALSE;   // Clear for next request
       }
       /* fix to replace 'NULL' dates with '0' (shreeve@uci.edu) */
       else if (((field->type() == FIELD_TYPE_DATE) ||