From 545a6194e827ace9d2d560d89dcde735676abbdb Mon Sep 17 00:00:00 2001
From: Varun Gupta <varun.gupta@mariadb.com>
Date: Mon, 22 Jun 2020 19:48:46 +0530
Subject: [PATCH] MDEV-22187: SIGSEGV in ha_innobase::cmp_ref on DELETE

Added a new test file for tests with delete using INNODB.
---
 mysql-test/main/delete_innodb.result | 26 ++++++++++++++++++++++++++
 mysql-test/main/delete_innodb.test   | 22 ++++++++++++++++++++++
 2 files changed, 48 insertions(+)
 create mode 100644 mysql-test/main/delete_innodb.result
 create mode 100644 mysql-test/main/delete_innodb.test

diff --git a/mysql-test/main/delete_innodb.result b/mysql-test/main/delete_innodb.result
new file mode 100644
index 0000000000000..e82d162cce808
--- /dev/null
+++ b/mysql-test/main/delete_innodb.result
@@ -0,0 +1,26 @@
+# Tests for delete with INNODB
+#
+# MDEV-22187: SIGSEGV in ha_innobase::cmp_ref on DELETE
+#
+SET @save_sort_buffer_size= @@sort_buffer_size;
+SET sort_buffer_size=1024;
+CREATE TABLE t1(c1 CHAR(255) PRIMARY KEY) ENGINE=InnoDB;
+INSERT INTO t1 VALUES (0), ('a'), ('b');
+ANALYZE TABLE T1 PERSISTENT FOR ALL;
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Engine-independent statistics collected
+test.t1	analyze	status	OK
+SELECT * FROM t1;
+c1
+0
+a
+b
+EXPLAIN DELETE b FROM t1 AS a JOIN t1 AS b;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	a	index	NULL	PRIMARY	255	NULL	3	Using index
+1	SIMPLE	b	ALL	NULL	NULL	NULL	NULL	3	
+DELETE b FROM t1 AS a JOIN t1 AS b;
+SELECT * FROM t1;
+c1
+SET sort_buffer_size=@save_sort_buffer_size;
+DROP TABLE t1;
diff --git a/mysql-test/main/delete_innodb.test b/mysql-test/main/delete_innodb.test
new file mode 100644
index 0000000000000..17a4e4d98f3a8
--- /dev/null
+++ b/mysql-test/main/delete_innodb.test
@@ -0,0 +1,22 @@
+--source include/have_innodb.inc
+--source include/have_sequence.inc
+
+--echo # Tests for delete with INNODB
+
+--echo #
+--echo # MDEV-22187: SIGSEGV in ha_innobase::cmp_ref on DELETE
+--echo #
+
+SET @save_sort_buffer_size= @@sort_buffer_size;
+SET sort_buffer_size=1024;
+CREATE TABLE t1(c1 CHAR(255) PRIMARY KEY) ENGINE=InnoDB;
+
+INSERT INTO t1 VALUES (0), ('a'), ('b');
+ANALYZE TABLE T1 PERSISTENT FOR ALL;
+SELECT * FROM t1;
+EXPLAIN DELETE b FROM t1 AS a JOIN t1 AS b;
+DELETE b FROM t1 AS a JOIN t1 AS b;
+SELECT * FROM t1;
+
+SET sort_buffer_size=@save_sort_buffer_size;
+DROP TABLE t1;