feat(query): add tests

Author: sundy-li

src/query/functions-v2/src/aggregates/aggregate_distinct_state.rs

@@ -288,7 +288,7 @@ impl DistinctStateFunc<KeysRef> for AggregateDistinctStringState {
             data: values,
             offsets,
         };
-        return Ok(vec![Column::String(c.build())]);
+        Ok(vec![Column::String(c.build())])
     }
 }
 

tests/suites/0_stateless/20+_others/20_0010_distinct_aggr.result

@@ -0,0 +1 @@
+102

tests/suites/0_stateless/20+_others/20_0010_distinct_aggr.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
+. "$CURDIR"/../../../shell_env.sh
+
+
+echo "create table s_distinct (a String);" | $MYSQL_CLIENT_CONNECT
+
+for i in `seq 1 100`;do
+	echo "insert into s_distinct values ('$i'), ('$[i+1]'), ('$[i+2]')" | $MYSQL_CLIENT_CONNECT
+done
+
+echo "select count(distinct a) from s_distinct" |  $MYSQL_CLIENT_CONNECT
+
+echo "drop table s_distinct;" | $MYSQL_CLIENT_CONNECT