1 files changed, 120 insertions, 0 deletions
diff --git a/mysql-test/main/query_cache_merge.test b/mysql-test/main/query_cache_merge.test
new file mode 100644
index 00000000..c3267d62
--- /dev/null
+++ b/mysql-test/main/query_cache_merge.test
@@ -0,0 +1,120 @@
+# Test query cache with many tables
+
+set @save_query_cache_size=@@global.query_cache_size;
+set @save_query_cache_type=@@global.query_cache_type;
+
+SET GLOBAL query_cache_type=ON;
+SET LOCAL query_cache_type=ON;
+
+--source include/have_query_cache.inc
+let $LIMIT=`SHOW VARIABLES LIKE 'open_files_limit'`;
+let $MIN_LIMIT=600;
+let $MAX_LIMIT=65536;
+--source include/check_var_limit.inc
+
+SET @@global.query_cache_size=1355776;
+
+#
+# more then 255 (257) merged tables test
+#
+
+flush status;
+disable_query_log;
+--disable_warnings
+let $1 = 257;
+while ($1)
+{
+  eval drop table if exists t$1;
+  eval create table t$1(a int) ENGINE=MyISAM;
+  eval insert into t$1 values (1),(2);
+  dec $1;
+}
+--enable_warnings
+
+#
+# In order for the test to pass in --ps-protocol, we must
+# set table_definition_cache size to at least 258 elements.
+# Otherwise table versions are bound to change between
+# prepare and execute, and we will get a constant validation
+# error. See WL#4165 for details.
+#
+--disable_ps2_protocol
+--disable_view_protocol
+set @save_table_definition_cache= @@global.table_definition_cache;
+set @@global.table_definition_cache=512;
+create table t00 (a int) engine=MERGE UNION=(t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12,t13,t14,t15,t16,t17,t18,t19,t20,t21,t22,t23,t24,t25,t26,t27,t28,t29,t30,t31,t32,t33,t34,t35,t36,t37,t38,t39,t40,t41,t42,t43,t44,t45,t46,t47,t48,t49,t50,t51,t52,t53,t54,t55,t56,t57,t58,t59,t60,t61,t62,t63,t64,t65,t66,t67,t68,t69,t70,t71,t72,t73,t74,t75,t76,t77,t78,t79,t80,t81,t82,t83,t84,t85,t86,t87,t88,t89,t90,t91,t92,t93,t94,t95,t96,t97,t98,t99,t100,t101,t102,t103,t104,t105,t106,t107,t108,t109,t110,t111,t112,t113,t114,t115,t116,t117,t118,t119,t120,t121,t122,t123,t124,t125,t126,t127,t128,t129,t130,t131,t132,t133,t134,t135,t136,t137,t138,t139,t140,t141,t142,t143,t144,t145,t146,t147,t148,t149,t150,t151,t152,t153,t154,t155,t156,t157,t158,t159,t160,t161,t162,t163,t164,t165,t166,t167,t168,t169,t170,t171,t172,t173,t174,t175,t176,t177,t178,t179,t180,t181,t182,t183,t184,t185,t186,t187,t188,t189,t190,t191,t192,t193,t194,t195,t196,t197,t198,t199,t200,t201,t202,t203,t204,t205,t206,t207,t208,t209,t210,t211,t212,t213,t214,t215,t216,t217,t218,t219,t220,t221,t222,t223,t224,t225,t226,t227,t228,t229,t230,t231,t232,t233,t234,t235,t236,t237,t238,t239,t240,t241,t242,t243,t244,t245,t246,t247,t248,t249,t250,t251,t252,t253,t254,t255,t256,t257) INSERT_METHOD=FIRST;
+enable_query_log;
+select count(*) from t00;
+select count(*) from t00;
+show status like "Qcache_queries_in_cache";
+show status like "Qcache_hits";
+delete from t256;
+show status like "Qcache_queries_in_cache";
+drop table t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12,t13,t14,t15,t16,t17,t18,t19,t20,t21,t22,t23,t24,t25,t26,t27,t28,t29,t30,t31,t32,t33,t34,t35,t36,t37,t38,t39,t40,t41,t42,t43,t44,t45,t46,t47,t48,t49,t50,t51,t52,t53,t54,t55,t56,t57,t58,t59,t60,t61,t62,t63,t64,t65,t66,t67,t68,t69,t70,t71,t72,t73,t74,t75,t76,t77,t78,t79,t80,t81,t82,t83,t84,t85,t86,t87,t88,t89,t90,t91,t92,t93,t94,t95,t96,t97,t98,t99,t100,t101,t102,t103,t104,t105,t106,t107,t108,t109,t110,t111,t112,t113,t114,t115,t116,t117,t118,t119,t120,t121,t122,t123,t124,t125,t126,t127,t128,t129,t130,t131,t132,t133,t134,t135,t136,t137,t138,t139,t140,t141,t142,t143,t144,t145,t146,t147,t148,t149,t150,t151,t152,t153,t154,t155,t156,t157,t158,t159,t160,t161,t162,t163,t164,t165,t166,t167,t168,t169,t170,t171,t172,t173,t174,t175,t176,t177,t178,t179,t180,t181,t182,t183,t184,t185,t186,t187,t188,t189,t190,t191,t192,t193,t194,t195,t196,t197,t198,t199,t200,t201,t202,t203,t204,t205,t206,t207,t208,t209,t210,t211,t212,t213,t214,t215,t216,t217,t218,t219,t220,t221,t222,t223,t224,t225,t226,t227,t228,t229,t230,t231,t232,t233,t234,t235,t236,t237,t238,t239,t240,t241,t242,t243,t244,t245,t246,t247,t248,t249,t250,t251,t252,t253,t254,t255,t256,t257,t00;
+
+SET @@global.query_cache_size=0;
+set @@global.table_definition_cache=@save_table_definition_cache;
+--enable_view_protocol
+--enable_ps2_protocol
+
+# End of 4.1 tests
+
+#
+# Bug#33362: Query cache invalidation (truncate) may hang if cached query uses many tables
+#
+
+SET @save_table_definition_cache = @@global.table_definition_cache;
+SET @@global.table_definition_cache = 512;
+
+let $c= 255;
+
+while ($c)
+{
+  eval CREATE TABLE t$c (a INT);
+  eval INSERT INTO t$c VALUES ($c);
+  dec $c;
+}
+
+let $c= 254;
+let $str= t255;
+
+while ($c)
+{
+  let $str= t$c,$str;
+  dec $c;
+}
+
+eval CREATE TABLE t0 (a INT) ENGINE=MERGE UNION($str);
+SET GLOBAL query_cache_size = 1048576;
+FLUSH STATUS;
+--disable_view_protocol
+SELECT a FROM t0 WHERE a = 1;
+SHOW STATUS LIKE "Qcache_queries_in_cache";
+--enable_view_protocol
+
+let $c= 255;
+let $i= 1;
+
+while ($c)
+{
+  eval TRUNCATE TABLE t$c;
+  eval SELECT a FROM t$i;
+  dec $c;
+  inc $i;
+}
+
+SELECT a FROM t0;
+DROP TABLE t0;
+
+let $c= 255;
+
+while ($c)
+{
+  eval DROP TABLE t$c;
+  dec $c;
+}
+
+SET @@global.query_cache_size = @save_query_cache_size;
+SET @@global.table_definition_cache = @save_table_definition_cache;
+SET @@global.query_cache_type = @save_query_cache_type;
+--echo End of 5.1 tests