Test for query cache in combination with NDB

mysql-test/r/ndb_cache.result:
  Updated tests and results for ndb_cache
mysql-test/t/ndb_cache.test:
  Updated tests and results for ndb_cache

1 files changed, 84 insertions, 12 deletions

diff --git a/mysql-test/t/ndb_cache.test b/mysql-test/t/ndb_cache.test
index bd368105a84..8bdcbe17728 100644
--- a/mysql-test/t/ndb_cache.test
+++ b/mysql-test/t/ndb_cache.test
@@ -1,33 +1,77 @@
 -- source include/have_query_cache.inc
 -- source include/have_ndb.inc
-set GLOBAL ndb_query_cache_type=on;
-# following line have to be removed when ndb_query_cache_type will made
-# global only
-set ndb_query_cache_type=on;
-set GLOBAL query_cache_size=1355776;
-reset query cache;
-flush status;
 
 --disable_warnings
 drop table if exists t1;
 --enable_warnings
 
-CREATE TABLE t1 (a int) ENGINE=ndbcluster;
-insert into t1 value (2);
+# Turn on and reset query cache
+set GLOBAL query_cache_type=on;
+set GLOBAL query_cache_size=1355776;
+reset query cache;
+flush status;
+
+# Create test table in NDB
+CREATE TABLE t1 ( pk int not null primary key,
+ a int, b int not null, c varchar(20)) ENGINE=ndbcluster;
+insert into t1 value (1, 2, 3, 'First row');
+
+# Perform one query which should be inerted in query cache
 select * from t1;
 show status like "Qcache_queries_in_cache";
 show status like "Qcache_inserts";
 show status like "Qcache_hits";
+
+# Perform the same query and make sure the query cache is hit
+select * from t1;
+show status like "Qcache_hits";
+
+# Update the table and make sure the correct data is returned
+update t1 set a=3 where pk=1;
+select * from t1;
+show status like "Qcache_inserts";
+show status like "Qcache_hits";
+
+# Insert a new record and make sure the correct data is returned
+insert into t1 value (2, 7, 8, 'Second row');
+insert into t1 value (4, 5, 6, 'Fourth row');
+select * from t1;
+show status like "Qcache_inserts";
+show status like "Qcache_hits";
+select * from t1;
+show status like "Qcache_hits";
+
+# Perform a "new" query and make sure the query cache is not hit
+select * from t1 where b=3;
+show status like "Qcache_queries_in_cache";
+show status like "Qcache_hits";
+
+# Same query again...
+select * from t1 where b=3;
+show status like "Qcache_hits";
+
+# Delete from the table
+delete from t1 where c='Fourth row';
+show status like "Qcache_queries_in_cache";
+select * from t1 where b=3;
+show status like "Qcache_hits";
+
+# Start another connection and check that the query cache is hit
 connect (con1,localhost,root,,);
 connection con1;
 use test;
-set autocommit=0;
-update t1 set a=3;
+select * from t1;
+select * from t1 where b=3;
+show status like "Qcache_hits";
+
+# Update the table and switch to other connection 
+update t1 set a=4 where b=3;
 connect (con2,localhost,root,,);
 connection con2;
+use test;
+show status like "Qcache_queries_in_cache";
 select * from t1;
 select * from t1;
-show status like "Qcache_queries_in_cache";
 show status like "Qcache_inserts";
 show status like "Qcache_hits";
 connection con1;
@@ -36,14 +80,42 @@ select * from t1;
 show status like "Qcache_queries_in_cache";
 show status like "Qcache_inserts";
 show status like "Qcache_hits";
+
+# Use transactions and make sure the query cache is not updated until
+# transaction is commited
+begin;
+update t1 set a=5 where pk=1;
+# Note!! the below test shows that table is invalidated 
+# before transaction is committed
+# TODO Fix so that cache is not invalidated HERE!
+show status like "Qcache_queries_in_cache";
+show status like "Qcache_inserts";
+show status like "Qcache_hits";
+connection con2;
+select * from t1;
+show status like "Qcache_queries_in_cache";
+show status like "Qcache_inserts";
+show status like "Qcache_hits";
+connection con1;
 commit;
+# TODO Here query is invalidated once again, commit count in NDB has changed
+show status like "Qcache_queries_in_cache";
+show status like "Qcache_inserts";
+show status like "Qcache_hits";
 connection con2;
 select * from t1;
+show status like "Qcache_inserts";
+show status like "Qcache_hits";
+connection con1;
 select * from t1;
 show status like "Qcache_queries_in_cache";
 show status like "Qcache_inserts";
 show status like "Qcache_hits";
+
 drop table t1;
 
+show status like "Qcache_queries_in_cache";
 
 SET GLOBAL query_cache_size=0;
+
+