Fix calls to free_underlaid_joins() in INSERT, DELETE, and UPDATE

handling so that indexes are closed before trying to commit the
transaction. (Bug #15536)

mysql-test/r/bdb.result

@@ -1284,3 +1284,22 @@ SELECT id FROM t1 WHERE (list_id = 1) AND (term = "letterd");
 id
 4
 DROP TABLE t1;
+create table t1 (a int, key(a)) engine=bdb;
+create table t2 (b int, key(b)) engine=bdb;
+insert into t1 values (1),(1),(2),(3),(4);
+insert into t2 values (1),(5),(6),(7);
+delete from t1 where (a in (select b from t2));
+select count(*) from t1;
+count(*)
+3
+insert into t1 set a=(select b from t2);
+ERROR 21000: Subquery returns more than 1 row
+select count(*) from t1;
+count(*)
+3
+update t1 set a = a + 1 where (a in (select b from t2));
+select count(*) from t1;
+count(*)
+3
+drop table t1, t2;
+End of 4.1 tests

mysql-test/t/bdb.test

@@ -930,4 +930,22 @@ SELECT id FROM t1 WHERE (list_id = 1) AND (term = "lettera");
 SELECT id FROM t1 WHERE (list_id = 1) AND (term = "letterd");
 DROP TABLE t1;
 
-# End of 4.1 tests
+#
+# Bug #15536: Crash when DELETE with subquery using BDB tables
+#
+create table t1 (a int, key(a)) engine=bdb;
+create table t2 (b int, key(b)) engine=bdb;
+insert into t1 values (1),(1),(2),(3),(4);
+insert into t2 values (1),(5),(6),(7);
+delete from t1 where (a in (select b from t2));
+select count(*) from t1;
+# INSERT also blows up
+--error 1242
+insert into t1 set a=(select b from t2);
+select count(*) from t1;
+# UPDATE also blows up
+update t1 set a = a + 1 where (a in (select b from t2));
+select count(*) from t1;
+drop table t1, t2;
+
+--echo End of 4.1 tests

sql/sql_delete.cc

@@ -241,6 +241,7 @@ int mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds,
     if (!log_delayed)
       thd->options|=OPTION_STATUS_NO_TRANS_UPDATE;
   }
+  free_underlaid_joins(thd, &thd->lex->select_lex);
   if (transactional_table)
   {
     if (ha_autocommit_or_rollback(thd,error >= 0))
@@ -252,7 +253,6 @@ int mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds,
     mysql_unlock_tables(thd, thd->lock);
     thd->lock=0;
   }
-  free_underlaid_joins(thd, &thd->lex->select_lex);
   if (error >= 0 || thd->net.report_error)
     send_error(thd,thd->killed ? ER_SERVER_SHUTDOWN: 0);
   else

sql/sql_insert.cc

@@ -194,7 +194,7 @@ int mysql_insert(THD *thd,TABLE_LIST *table_list,
     runs without --log-update or --log-bin).
   */
   int log_on= DELAYED_LOG_UPDATE | DELAYED_LOG_BIN ;
-  bool transactional_table, log_delayed;
+  bool transactional_table, log_delayed, joins_freed= FALSE;
   uint value_count;
   ulong counter = 1;
   ulonglong id;
@@ -386,6 +386,9 @@ int mysql_insert(THD *thd,TABLE_LIST *table_list,
     thd->row_count++;
   }
 
+  free_underlaid_joins(thd, &thd->lex->select_lex);
+  joins_freed= TRUE;
+
   /*
     Now all rows are inserted.  Time to update logs and sends response to
     user
@@ -480,7 +483,6 @@ int mysql_insert(THD *thd,TABLE_LIST *table_list,
 	      (ulong) (info.deleted+info.updated), (ulong) thd->cuted_fields);
     ::send_ok(thd,info.copied+info.deleted+info.updated,(ulonglong)id,buff);
   }
-  free_underlaid_joins(thd, &thd->lex->select_lex);
   table->insert_values=0;
   DBUG_RETURN(0);
 
@@ -489,6 +491,7 @@ int mysql_insert(THD *thd,TABLE_LIST *table_list,
   if (lock_type == TL_WRITE_DELAYED)
     end_delayed_insert(thd);
 #endif
+  if (!joins_freed)
     free_underlaid_joins(thd, &thd->lex->select_lex);
   table->insert_values=0;
   DBUG_RETURN(-1);

sql/sql_update.cc

@@ -377,6 +377,7 @@ int mysql_update(THD *thd,
     if (!log_delayed)
       thd->options|=OPTION_STATUS_NO_TRANS_UPDATE;
   }
+  free_underlaid_joins(thd, &thd->lex->select_lex);
   if (transactional_table)
   {
     if (ha_autocommit_or_rollback(thd, error >= 0))
@@ -389,7 +390,6 @@ int mysql_update(THD *thd,
     thd->lock=0;
   }
 
-  free_underlaid_joins(thd, &thd->lex->select_lex);
   if (error >= 0)
     send_error(thd,thd->killed ? ER_SERVER_SHUTDOWN : 0); /* purecov: inspected */
   else