初版

build/lib/mysql/mysql-test/t/bench_count_distinct.test

@@ -0,0 +1,22 @@
+#
+# Test of count(distinct ..)
+#
+
+--disable_warnings
+drop table if exists t1;
+--enable_warnings
+create table t1(n int not null, key(n)) delay_key_write = 1;
+let $1=100;
+disable_query_log;
+while ($1)
+{
+ eval insert into t1 values($1);
+ eval insert into t1 values($1);
+ dec $1;
+}
+enable_query_log;
+select count(distinct n) from t1;
+explain extended select count(distinct n) from t1;
+drop table t1;
+
+# End of 4.1 tests