From 1159996ee5902ea817e9fc5b565b7ff1cda774d6 Mon Sep 17 00:00:00 2001
From: unknown <bell@sanja.is.com.ua>
Date: Thu, 22 Jul 2004 14:05:00 +0300
Subject: [PATCH] privent crash on temporary table during indexes lookup
 (BUG#4677)

mysql-test/r/view.result:
  check 'use index' on view with temporary table
mysql-test/t/view.test:
  check 'use index' on view with temporary table
sql/sql_base.cc:
  privent crash on temporary table
---
 mysql-test/r/view.result |  6 ++++++
 mysql-test/t/view.test   | 10 ++++++++++
 sql/sql_base.cc          |  5 +++--
 3 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/mysql-test/r/view.result b/mysql-test/r/view.result
index 1cd80b857ab..435237bff00 100644
--- a/mysql-test/r/view.result
+++ b/mysql-test/r/view.result
@@ -977,3 +977,9 @@ ERROR HY000: View 'test.v1' references invalid table(s) or column(s)
 drop view v1;
 create view v1 (a,a) as select 'a','a';
 ERROR 42S21: Duplicate column name 'a'
+create table t1 (a int, b int);
+create view v1 as select a, sum(b) from t1 group by a;
+select b from v1 use index (some_index) where b=1;
+ERROR 42000: Key column 'some_index' doesn't exist in table
+drop view v1;
+drop table t1;
diff --git a/mysql-test/t/view.test b/mysql-test/t/view.test
index b6ea504bc2e..40d23da5541 100644
--- a/mysql-test/t/view.test
+++ b/mysql-test/t/view.test
@@ -900,3 +900,13 @@ drop view v1;
 #
 -- error 1060
 create view v1 (a,a) as select 'a','a';
+
+#
+# check 'use index' on view with temporary table
+#
+create table t1 (a int, b int);
+create view v1 as select a, sum(b) from t1 group by a;
+-- error 1072
+select b from v1 use index (some_index) where b=1;
+drop view v1;
+drop table t1;
diff --git a/sql/sql_base.cc b/sql/sql_base.cc
index 03074ee3ba9..799fb3cd81d 100644
--- a/sql/sql_base.cc
+++ b/sql/sql_base.cc
@@ -2555,8 +2555,9 @@ bool get_key_map_from_key_list(key_map *map, TABLE *table,
   map->clear_all();
   while ((name=it++))
   {
-    if ((pos= find_type(&table->keynames, name->ptr(), name->length(), 1)) <=
-	0)
+    if (table->keynames.type_names == 0 ||
+        (pos= find_type(&table->keynames, name->ptr(), name->length(), 1)) <=
+        0)
     {
       my_error(ER_KEY_COLUMN_DOES_NOT_EXITS, MYF(0), name->c_ptr(),
 	       table->real_name);