From f6501fd3f5929393fef13babce545c39ee849afb Mon Sep 17 00:00:00 2001
From: unknown <bar@bar.mysql.r18.ru>
Date: Wed, 8 Oct 2003 10:18:38 +0500
Subject: [PATCH] query_cache.result, query_cache.test:   Character set
 variables test

mysql-test/t/query_cache.test:
  Character set variables test
mysql-test/r/query_cache.result:
  Character set variables test
---
 mysql-test/r/query_cache.result | 47 +++++++++++++++++++++++++++++++++
 mysql-test/t/query_cache.test   | 47 +++++++++++++++++++++++++++++++++
 2 files changed, 94 insertions(+)

diff --git a/mysql-test/r/query_cache.result b/mysql-test/r/query_cache.result
index d1ef5ab828e..a6aca2f983c 100644
--- a/mysql-test/r/query_cache.result
+++ b/mysql-test/r/query_cache.result
@@ -709,3 +709,50 @@ Variable_name	Value
 Qcache_queries_in_cache	2
 SET OPTION SQL_SELECT_LIMIT=DEFAULT;
 drop table t1;
+SET NAMES koi8r;
+CREATE TABLE t1 (a char(1) character set koi8r);
+INSERT INTO t1 VALUES (_koi8r'á'),(_koi8r'Á');
+SELECT a,'Â','â'='Â' FROM t1;
+a	Â	'â'='Â'
+á	Â	1
+Á	Â	1
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	12
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	1
+set collation_connection=koi8r_bin;
+SELECT a,'Â','â'='Â' FROM t1;
+a	Â	'â'='Â'
+á	Â	0
+Á	Â	0
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	12
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	2
+set character_set_client=cp1251;
+SELECT a,'Â','â'='Â' FROM t1;
+a	÷	'×'='÷'
+á	÷	0
+Á	÷	0
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	12
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	3
+set character_set_results=cp1251;
+SELECT a,'Â','â'='Â' FROM t1;
+a	Â	'â'='Â'
+À	Â	0
+à	Â	0
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	12
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	4
+DROP TABLE t1;
diff --git a/mysql-test/t/query_cache.test b/mysql-test/t/query_cache.test
index dcdf70ee612..ed4c5c91c4d 100644
--- a/mysql-test/t/query_cache.test
+++ b/mysql-test/t/query_cache.test
@@ -487,3 +487,50 @@ select * from t1;
 show status like "Qcache_queries_in_cache";
 SET OPTION SQL_SELECT_LIMIT=DEFAULT;
 drop table t1;
+
+#
+# Test character set related variables:
+#   character_set_result
+#   character_set_client
+#   charactet_set_connection/collation_connection
+# If at least one of the above variables has changed,
+# the cached query can't be reused. In the below test
+# absolutely the same query is used several times,
+# SELECT should fetch different results for every instance. 
+# No hits should be produced.
+# New cache entry should appear for every SELECT.
+#
+SET NAMES koi8r;
+CREATE TABLE t1 (a char(1) character set koi8r);
+INSERT INTO t1 VALUES (_koi8r'á'),(_koi8r'Á');
+#
+# Run select
+#
+SELECT a,'Â','â'='Â' FROM t1;
+show status like "Qcache_hits";
+show status like "Qcache_queries_in_cache";
+#
+# Change collation_connection and run the same query again
+#
+set collation_connection=koi8r_bin;
+SELECT a,'Â','â'='Â' FROM t1; 
+show status like "Qcache_hits";
+show status like "Qcache_queries_in_cache";
+#
+# Now change character_set_client and run the same query again
+#
+set character_set_client=cp1251;
+SELECT a,'Â','â'='Â' FROM t1; 
+show status like "Qcache_hits";
+show status like "Qcache_queries_in_cache";
+#
+# And finally change character_set_results and run the same query again
+#
+set character_set_results=cp1251;
+SELECT a,'Â','â'='Â' FROM t1; 
+show status like "Qcache_hits";
+show status like "Qcache_queries_in_cache";
+#
+# Keep things tidy
+#
+DROP TABLE t1;