66 lines
2.3 KiB
Go
66 lines
2.3 KiB
Go
// Copyright 2021 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package executor_test
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import (
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"fmt"
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"strings"
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"testing"
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"github.com/pingcap/tidb/testkit"
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"github.com/stretchr/testify/require"
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)
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func TestAggInDisk(t *testing.T) {
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store, clean := testkit.CreateMockStore(t)
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defer clean()
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tk := testkit.NewTestKit(t, store)
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tk.MustExec("use test")
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tk.MustExec("set tidb_hashagg_final_concurrency = 1;")
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tk.MustExec("set tidb_hashagg_partial_concurrency = 1;")
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tk.MustExec("set tidb_mem_quota_query = 4194304")
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tk.MustExec("drop table if exists t1")
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tk.MustExec("create table t(a int)")
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sql := "insert into t values (0)"
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for i := 1; i <= 200; i++ {
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sql += fmt.Sprintf(",(%v)", i)
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}
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sql += ";"
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tk.MustExec(sql)
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rows := tk.MustQuery("desc analyze select /*+ HASH_AGG() */ avg(t1.a) from t t1 join t t2 group by t1.a, t2.a;").Rows()
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for _, row := range rows {
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length := len(row)
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line := fmt.Sprintf("%v", row)
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disk := fmt.Sprintf("%v", row[length-1])
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if strings.Contains(line, "HashAgg") {
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require.False(t, strings.Contains(disk, "0 Bytes"))
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require.True(t, strings.Contains(disk, "MB") ||
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strings.Contains(disk, "KB") ||
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strings.Contains(disk, "Bytes"))
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}
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}
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// Add code cover
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// Test spill chunk. Add a line to avoid tmp spill chunk is always full.
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tk.MustExec("insert into t values(0)")
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tk.MustQuery("select sum(tt.b) from ( select /*+ HASH_AGG() */ avg(t1.a) as b from t t1 join t t2 group by t1.a, t2.a) as tt").Check(
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testkit.Rows("4040100.0000"))
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// Test no groupby and no data.
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tk.MustExec("drop table t;")
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tk.MustExec("create table t(c int, c1 int);")
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tk.MustQuery("select /*+ HASH_AGG() */ count(c) from t;").Check(testkit.Rows("0"))
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tk.MustQuery("select /*+ HASH_AGG() */ count(c) from t group by c1;").Check(testkit.Rows())
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}
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