From 5431ecb593b1eff9d71b629b638d65458d286a4d Mon Sep 17 00:00:00 2001
From: "petr/cps@mysql.com/owlet." <>
Date: Tue, 8 Aug 2006 12:03:24 +0400
Subject: [PATCH] Fix windows pushbuild failure: the bug occured because we
 didn't check for NULL value of the lex_create_info->db_type pointer. The
 pointer is NULL in the case, when the engine name is unknown to the server.
 This happens with NDB on Windows.

---
 sql/sql_table.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sql/sql_table.cc b/sql/sql_table.cc
index 3e218f7d33e..5325758fd12 100644
--- a/sql/sql_table.cc
+++ b/sql/sql_table.cc
@@ -5043,8 +5043,9 @@ bool mysql_alter_table(THD *thd,char *new_db, char *new_name,
     /* Disable alter of log tables to unsupported engine */
     if ((table_kind == GENERAL_LOG || table_kind == SLOW_LOG) &&
         (lex_create_info->used_fields & HA_CREATE_USED_ENGINE) &&
+        (!lex_create_info->db_type || /* unknown engine */
         !(lex_create_info->db_type->db_type == DB_TYPE_MYISAM ||
-          lex_create_info->db_type->db_type == DB_TYPE_CSV_DB))
+          lex_create_info->db_type->db_type == DB_TYPE_CSV_DB)))
     {
       my_error(ER_BAD_LOG_ENGINE, MYF(0));
       DBUG_RETURN(TRUE);