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cte_test.go
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// Copyright 2021 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package executor_test
import (
"fmt"
"math/rand"
"testing"
"github.com/pingcap/failpoint"
"github.com/pingcap/tidb/parser/terror"
"github.com/pingcap/tidb/testkit"
"github.com/pingcap/tidb/types"
"github.com/stretchr/testify/require"
"golang.org/x/exp/slices"
)
func TestBasicCTE(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
rows := tk.MustQuery("with recursive cte1 as (" +
"select 1 c1 " +
"union all " +
"select c1 + 1 c1 from cte1 where c1 < 5) " +
"select * from cte1")
rows.Check(testkit.Rows("1", "2", "3", "4", "5"))
// Two seed parts.
rows = tk.MustQuery("with recursive cte1 as (" +
"select 1 c1 " +
"union all " +
"select 2 c1 " +
"union all " +
"select c1 + 1 c1 from cte1 where c1 < 10) " +
"select * from cte1 order by c1")
rows.Check(testkit.Rows("1", "2", "2", "3", "3", "4", "4", "5", "5", "6", "6", "7", "7", "8", "8", "9", "9", "10", "10"))
// Two recursive parts.
rows = tk.MustQuery("with recursive cte1 as (" +
"select 1 c1 " +
"union all " +
"select 2 c1 " +
"union all " +
"select c1 + 1 c1 from cte1 where c1 < 3 " +
"union all " +
"select c1 + 2 c1 from cte1 where c1 < 5) " +
"select * from cte1 order by c1")
rows.Check(testkit.Rows("1", "2", "2", "3", "3", "3", "4", "4", "5", "5", "5", "6", "6"))
tk.MustExec("drop table if exists t1;")
tk.MustExec("create table t1(a int);")
tk.MustExec("insert into t1 values(1);")
tk.MustExec("insert into t1 values(2);")
rows = tk.MustQuery("SELECT * FROM t1 dt WHERE EXISTS(WITH RECURSIVE qn AS (SELECT a*0 AS b UNION ALL SELECT b+1 FROM qn WHERE b=0) SELECT * FROM qn WHERE b=a);")
rows.Check(testkit.Rows("1"))
rows = tk.MustQuery("SELECT * FROM t1 dt WHERE EXISTS( WITH RECURSIVE qn AS (SELECT a*0 AS b UNION ALL SELECT b+1 FROM qn WHERE b=0 or b = 1) SELECT * FROM qn WHERE b=a );")
rows.Check(testkit.Rows("1", "2"))
rows = tk.MustQuery("with recursive c(p) as (select 1), cte(a, b) as (select 1, 1 union select a+1, 1 from cte, c where a < 5) select * from cte order by 1, 2;")
rows.Check(testkit.Rows("1 1", "2 1", "3 1", "4 1", "5 1"))
}
func TestUnionDistinct(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test;")
// Basic test. UNION/UNION ALL intersects.
rows := tk.MustQuery("with recursive cte1(c1) as (select 1 union select 1 union select 1 union all select c1 + 1 from cte1 where c1 < 3) select * from cte1 order by c1;")
rows.Check(testkit.Rows("1", "2", "3"))
rows = tk.MustQuery("with recursive cte1(c1) as (select 1 union all select 1 union select 1 union all select c1 + 1 from cte1 where c1 < 3) select * from cte1 order by c1;")
rows.Check(testkit.Rows("1", "2", "3"))
tk.MustExec("drop table if exists t1;")
tk.MustExec("create table t1(c1 int, c2 int);")
tk.MustExec("insert into t1 values(1, 1), (1, 2), (2, 2);")
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 c1 from t1) select * from cte1 order by c1;")
rows.Check(testkit.Rows("1", "2", "3"))
tk.MustExec("drop table if exists t1;")
tk.MustExec("create table t1(c1 int);")
tk.MustExec("insert into t1 values(1), (1), (1), (2), (2), (2);")
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 c1 from cte1 where c1 < 4) select * from cte1 order by c1;")
rows.Check(testkit.Rows("1", "2", "3", "4"))
}
func TestCTEMaxRecursionDepth(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test;")
tk.MustExec("set @@cte_max_recursion_depth = -1;")
err := tk.QueryToErr("with recursive cte1(c1) as (select 1 union select c1 + 1 c1 from cte1 where c1 < 100) select * from cte1;")
require.EqualError(t, err, "[executor:3636]Recursive query aborted after 1 iterations. Try increasing @@cte_max_recursion_depth to a larger value")
// If there is no recursive part, query runs ok.
rows := tk.MustQuery("with recursive cte1(c1) as (select 1 union select 2) select * from cte1 order by c1;")
rows.Check(testkit.Rows("1", "2"))
rows = tk.MustQuery("with cte1(c1) as (select 1 union select 2) select * from cte1 order by c1;")
rows.Check(testkit.Rows("1", "2"))
tk.MustExec("set @@cte_max_recursion_depth = 0;")
err = tk.QueryToErr("with recursive cte1(c1) as (select 1 union select c1 + 1 c1 from cte1 where c1 < 0) select * from cte1;")
require.EqualError(t, err, "[executor:3636]Recursive query aborted after 1 iterations. Try increasing @@cte_max_recursion_depth to a larger value")
err = tk.QueryToErr("with recursive cte1(c1) as (select 1 union select c1 + 1 c1 from cte1 where c1 < 1) select * from cte1;")
require.EqualError(t, err, "[executor:3636]Recursive query aborted after 1 iterations. Try increasing @@cte_max_recursion_depth to a larger value")
// If there is no recursive part, query runs ok.
rows = tk.MustQuery("with recursive cte1(c1) as (select 1 union select 2) select * from cte1 order by c1;")
rows.Check(testkit.Rows("1", "2"))
rows = tk.MustQuery("with cte1(c1) as (select 1 union select 2) select * from cte1 order by c1;")
rows.Check(testkit.Rows("1", "2"))
tk.MustExec("set @@cte_max_recursion_depth = 1;")
rows = tk.MustQuery("with recursive cte1(c1) as (select 1 union select c1 + 1 c1 from cte1 where c1 < 0) select * from cte1;")
rows.Check(testkit.Rows("1"))
rows = tk.MustQuery("with recursive cte1(c1) as (select 1 union select c1 + 1 c1 from cte1 where c1 < 1) select * from cte1;")
rows.Check(testkit.Rows("1"))
err = tk.QueryToErr("with recursive cte1(c1) as (select 1 union select c1 + 1 c1 from cte1 where c1 < 2) select * from cte1;")
require.EqualError(t, err, "[executor:3636]Recursive query aborted after 2 iterations. Try increasing @@cte_max_recursion_depth to a larger value")
// If there is no recursive part, query runs ok.
rows = tk.MustQuery("with recursive cte1(c1) as (select 1 union select 2) select * from cte1 order by c1;")
rows.Check(testkit.Rows("1", "2"))
rows = tk.MustQuery("with cte1(c1) as (select 1 union select 2) select * from cte1 order by c1;")
rows.Check(testkit.Rows("1", "2"))
}
func TestCTEWithLimit(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test;")
// Basic recursive tests.
rows := tk.MustQuery("with recursive cte1(c1) as (select 1 union select c1 + 1 from cte1 limit 5 offset 0) select * from cte1")
rows.Check(testkit.Rows("1", "2", "3", "4", "5"))
rows = tk.MustQuery("with recursive cte1(c1) as (select 1 union select c1 + 1 from cte1 limit 5 offset 1) select * from cte1")
rows.Check(testkit.Rows("2", "3", "4", "5", "6"))
rows = tk.MustQuery("with recursive cte1(c1) as (select 1 union select c1 + 1 from cte1 limit 5 offset 10) select * from cte1")
rows.Check(testkit.Rows("11", "12", "13", "14", "15"))
rows = tk.MustQuery("with recursive cte1(c1) as (select 1 union select c1 + 1 from cte1 limit 5 offset 995) select * from cte1")
rows.Check(testkit.Rows("996", "997", "998", "999", "1000"))
rows = tk.MustQuery("with recursive cte1(c1) as (select 1 union select c1 + 1 from cte1 limit 5 offset 6) select * from cte1;")
rows.Check(testkit.Rows("7", "8", "9", "10", "11"))
// Test with cte_max_recursion_depth
tk.MustExec("set cte_max_recursion_depth=2;")
rows = tk.MustQuery("with recursive cte1(c1) as (select 0 union select c1 + 1 from cte1 limit 1 offset 2) select * from cte1;")
rows.Check(testkit.Rows("2"))
err := tk.QueryToErr("with recursive cte1(c1) as (select 0 union select c1 + 1 from cte1 limit 1 offset 3) select * from cte1;")
require.EqualError(t, err, "[executor:3636]Recursive query aborted after 3 iterations. Try increasing @@cte_max_recursion_depth to a larger value")
tk.MustExec("set cte_max_recursion_depth=1000;")
rows = tk.MustQuery("with recursive cte1(c1) as (select 0 union select c1 + 1 from cte1 limit 5 offset 996) select * from cte1;")
rows.Check(testkit.Rows("996", "997", "998", "999", "1000"))
err = tk.QueryToErr("with recursive cte1(c1) as (select 0 union select c1 + 1 from cte1 limit 5 offset 997) select * from cte1;")
require.EqualError(t, err, "[executor:3636]Recursive query aborted after 1001 iterations. Try increasing @@cte_max_recursion_depth to a larger value")
rows = tk.MustQuery("with recursive cte1(c1) as (select 1 union select c1 + 1 from cte1 limit 0 offset 1) select * from cte1")
rows.Check(testkit.Rows())
rows = tk.MustQuery("with recursive cte1(c1) as (select 1 union select c1 + 1 from cte1 limit 0 offset 10) select * from cte1")
rows.Check(testkit.Rows())
// Test join.
rows = tk.MustQuery("with recursive cte1(c1) as (select 1 union select c1 + 1 from cte1 limit 2 offset 1) select * from cte1 dt1 join cte1 dt2 order by dt1.c1, dt2.c1;")
rows.Check(testkit.Rows("2 2", "2 3", "3 2", "3 3"))
rows = tk.MustQuery("with recursive cte1(c1) as (select 1 union select c1 + 1 from cte1 limit 2 offset 1) select * from cte1 dt1 join cte1 dt2 on dt1.c1 = dt2.c1 order by dt1.c1, dt1.c1;")
rows.Check(testkit.Rows("2 2", "3 3"))
// Test subquery.
// Different with mysql, maybe it's mysql bug?(https://bugs.mysql.com/bug.php?id=103890&thanks=4)
rows = tk.MustQuery("with recursive cte1(c1) as (select 1 union select c1 + 1 from cte1 limit 2 offset 1) select c1 from cte1 where c1 in (select 2);")
rows.Check(testkit.Rows("2"))
rows = tk.MustQuery("with recursive cte1(c1) as (select 1 union select c1 + 1 from cte1 limit 2 offset 1) select c1 from cte1 dt where c1 in (select c1 from cte1 where 1 = dt.c1 - 1);")
rows.Check(testkit.Rows("2"))
// Test Apply.
rows = tk.MustQuery("with recursive cte1(c1) as (select 1 union select c1 + 1 from cte1 limit 2 offset 1) select c1 from cte1 where cte1.c1 = (select dt1.c1 from cte1 dt1 where dt1.c1 = cte1.c1);")
rows.Check(testkit.Rows("2", "3"))
// Recursive tests with table.
tk.MustExec("drop table if exists t1;")
tk.MustExec("create table t1(c1 int);")
tk.MustExec("insert into t1 values(1), (2), (3);")
// Error: ERROR 1221 (HY000): Incorrect usage of UNION and LIMIT.
// Limit can only be at the end of SQL stmt.
err = tk.ExecToErr("with recursive cte1(c1) as (select c1 from t1 limit 1 offset 1 union select c1 + 1 from cte1 limit 0 offset 1) select * from cte1")
require.EqualError(t, err, "[planner:1221]Incorrect usage of UNION and LIMIT")
// Basic non-recusive tests.
rows = tk.MustQuery("with recursive cte1(c1) as (select 1 union select 2 order by 1 limit 1 offset 1) select * from cte1")
rows.Check(testkit.Rows("2"))
rows = tk.MustQuery("with recursive cte1(c1) as (select 1 union select 2 order by 1 limit 0 offset 1) select * from cte1")
rows.Check(testkit.Rows())
rows = tk.MustQuery("with recursive cte1(c1) as (select 1 union select 2 order by 1 limit 2 offset 0) select * from cte1")
rows.Check(testkit.Rows("1", "2"))
// Test with table.
tk.MustExec("drop table if exists t1;")
insertStr := "insert into t1 values(0)"
for i := 1; i < 300; i++ {
insertStr += fmt.Sprintf(", (%d)", i)
}
tk.MustExec("drop table if exists t1;")
tk.MustExec("create table t1(c1 int);")
tk.MustExec(insertStr)
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 c1 from cte1 limit 1) select * from cte1")
rows.Check(testkit.Rows("0"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 c1 from cte1 limit 1 offset 100) select * from cte1")
rows.Check(testkit.Rows("100"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 c1 from cte1 limit 5 offset 100) select * from cte1")
rows.Check(testkit.Rows("100", "101", "102", "103", "104"))
// Basic non-recursive tests.
rows = tk.MustQuery("with cte1 as (select c1 from t1 limit 2 offset 1) select * from cte1")
rows.Check(testkit.Rows("1", "2"))
rows = tk.MustQuery("with cte1 as (select c1 from t1 limit 2 offset 1) select * from cte1 dt1 join cte1 dt2 on dt1.c1 = dt2.c1")
rows.Check(testkit.Rows("1 1", "2 2"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select 2 limit 0 offset 1) select * from cte1")
rows.Check(testkit.Rows())
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select 2 limit 0 offset 1) select * from cte1 dt1 join cte1 dt2 on dt1.c1 = dt2.c1")
rows.Check(testkit.Rows())
// rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select 2 limit 5 offset 100) select * from cte1")
// rows.Check(testkit.Rows("100", "101", "102", "103", "104"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 limit 3 offset 100) select * from cte1")
rows.Check(testkit.Rows("100", "101", "102"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 limit 3 offset 100) select * from cte1 dt1 join cte1 dt2 on dt1.c1 = dt2.c1")
rows.Check(testkit.Rows("100 100", "101 101", "102 102"))
// Test limit 0.
tk.MustExec("set cte_max_recursion_depth = 0;")
tk.MustExec("drop table if exists t1;")
tk.MustExec("create table t1(c1 int);")
tk.MustExec("insert into t1 values(0);")
rows = tk.MustQuery("with recursive cte1 as (select 1/c1 c1 from t1 union select c1 + 1 c1 from cte1 where c1 < 2 limit 0) select * from cte1;")
rows.Check(testkit.Rows())
// MySQL err: ERROR 1365 (22012): Division by 0. Because it gives error when computing 1/c1.
err = tk.QueryToErr("with recursive cte1 as (select 1/c1 c1 from t1 union select c1 + 1 c1 from cte1 where c1 < 2 limit 1) select * from cte1;")
require.EqualError(t, err, "[executor:3636]Recursive query aborted after 1 iterations. Try increasing @@cte_max_recursion_depth to a larger value")
tk.MustExec("set cte_max_recursion_depth = 1000;")
tk.MustExec("drop table if exists t1;")
tk.MustExec("create table t1(c1 int);")
tk.MustExec("insert into t1 values(1), (2), (3);")
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 from cte1 limit 0 offset 2) select * from cte1;")
rows.Check(testkit.Rows())
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 from cte1 limit 1 offset 2) select * from cte1;")
rows.Check(testkit.Rows("3"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 from cte1 limit 2 offset 2) select * from cte1;")
rows.Check(testkit.Rows("3", "4"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 from cte1 limit 3 offset 2) select * from cte1;")
rows.Check(testkit.Rows("3", "4", "5"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 from cte1 limit 4 offset 2) select * from cte1;")
rows.Check(testkit.Rows("3", "4", "5", "6"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 from cte1 limit 0 offset 3) select * from cte1;")
rows.Check(testkit.Rows())
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 from cte1 limit 1 offset 3) select * from cte1;")
rows.Check(testkit.Rows("4"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 from cte1 limit 2 offset 3) select * from cte1;")
rows.Check(testkit.Rows("4", "5"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 from cte1 limit 3 offset 3) select * from cte1;")
rows.Check(testkit.Rows("4", "5", "6"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 from cte1 limit 4 offset 3) select * from cte1;")
rows.Check(testkit.Rows("4", "5", "6", "7"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 from cte1 limit 0 offset 4) select * from cte1;")
rows.Check(testkit.Rows())
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 from cte1 limit 1 offset 4) select * from cte1;")
rows.Check(testkit.Rows("5"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 from cte1 limit 2 offset 4) select * from cte1;")
rows.Check(testkit.Rows("5", "6"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 from cte1 limit 3 offset 4) select * from cte1;")
rows.Check(testkit.Rows("5", "6", "7"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union select c1 + 1 from cte1 limit 4 offset 4) select * from cte1;")
rows.Check(testkit.Rows("5", "6", "7", "8"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union all select c1 + 1 from cte1 limit 0 offset 2) select * from cte1;")
rows.Check(testkit.Rows())
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union all select c1 + 1 from cte1 limit 1 offset 2) select * from cte1;")
rows.Check(testkit.Rows("3"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union all select c1 + 1 from cte1 limit 2 offset 2) select * from cte1;")
rows.Check(testkit.Rows("3", "2"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union all select c1 + 1 from cte1 limit 3 offset 2) select * from cte1;")
rows.Check(testkit.Rows("3", "2", "3"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union all select c1 + 1 from cte1 limit 4 offset 2) select * from cte1;")
rows.Check(testkit.Rows("3", "2", "3", "4"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union all select c1 + 1 from cte1 limit 0 offset 3) select * from cte1;")
rows.Check(testkit.Rows())
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union all select c1 + 1 from cte1 limit 1 offset 3) select * from cte1;")
rows.Check(testkit.Rows("2"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union all select c1 + 1 from cte1 limit 2 offset 3) select * from cte1;")
rows.Check(testkit.Rows("2", "3"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union all select c1 + 1 from cte1 limit 3 offset 3) select * from cte1;")
rows.Check(testkit.Rows("2", "3", "4"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union all select c1 + 1 from cte1 limit 4 offset 3) select * from cte1;")
rows.Check(testkit.Rows("2", "3", "4", "3"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union all select c1 + 1 from cte1 limit 0 offset 4) select * from cte1;")
rows.Check(testkit.Rows())
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union all select c1 + 1 from cte1 limit 1 offset 4) select * from cte1;")
rows.Check(testkit.Rows("3"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union all select c1 + 1 from cte1 limit 2 offset 4) select * from cte1;")
rows.Check(testkit.Rows("3", "4"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union all select c1 + 1 from cte1 limit 3 offset 4) select * from cte1;")
rows.Check(testkit.Rows("3", "4", "3"))
rows = tk.MustQuery("with recursive cte1(c1) as (select c1 from t1 union all select c1 + 1 from cte1 limit 4 offset 4) select * from cte1;")
rows.Check(testkit.Rows("3", "4", "3", "4"))
}
func TestSpillToDisk(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("SET GLOBAL tidb_enable_tmp_storage_on_oom = 1")
defer tk.MustExec("SET GLOBAL tidb_enable_tmp_storage_on_oom = 0")
tk.MustExec("use test;")
require.NoError(t, failpoint.Enable("github.com/pingcap/tidb/executor/testCTEStorageSpill", "return(true)"))
defer func() {
require.NoError(t, failpoint.Disable("github.com/pingcap/tidb/executor/testCTEStorageSpill"))
tk.MustExec("set tidb_mem_quota_query = 1073741824;")
}()
require.NoError(t, failpoint.Enable("github.com/pingcap/tidb/executor/testSortedRowContainerSpill", "return(true)"))
defer func() {
require.NoError(t, failpoint.Disable("github.com/pingcap/tidb/executor/testSortedRowContainerSpill"))
}()
// Use duplicated rows to test UNION DISTINCT.
tk.MustExec("set tidb_mem_quota_query = 1073741824;")
insertStr := "insert into t1 values(0)"
rowNum := 1000
vals := make([]int, rowNum)
vals[0] = 0
for i := 1; i < rowNum; i++ {
v := rand.Intn(100)
vals[i] = v
insertStr += fmt.Sprintf(", (%d)", v)
}
tk.MustExec("drop table if exists t1;")
tk.MustExec("create table t1(c1 int);")
tk.MustExec(insertStr)
tk.MustExec("set tidb_mem_quota_query = 40000;")
tk.MustExec("set cte_max_recursion_depth = 500000;")
sql := fmt.Sprintf("with recursive cte1 as ( "+
"select c1 from t1 "+
"union "+
"select c1 + 1 c1 from cte1 where c1 < %d) "+
"select c1 from cte1 order by c1;", rowNum)
rows := tk.MustQuery(sql)
memTracker := tk.Session().GetSessionVars().StmtCtx.MemTracker
diskTracker := tk.Session().GetSessionVars().StmtCtx.DiskTracker
require.Greater(t, memTracker.MaxConsumed(), int64(0))
require.Greater(t, diskTracker.MaxConsumed(), int64(0))
slices.Sort(vals)
resRows := make([]string, 0, rowNum)
for i := vals[0]; i <= rowNum; i++ {
resRows = append(resRows, fmt.Sprintf("%d", i))
}
rows.Check(testkit.Rows(resRows...))
}
func TestCTEExecError(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test;")
tk.MustExec("drop table if exists src;")
tk.MustExec("create table src(first int, second int);")
insertStr := fmt.Sprintf("insert into src values (%d, %d)", rand.Intn(1000), rand.Intn(1000))
for i := 0; i < 1000; i++ {
insertStr += fmt.Sprintf(",(%d, %d)", rand.Intn(1000), rand.Intn(1000))
}
insertStr += ";"
tk.MustExec(insertStr)
// Increase projection concurrency and decrease chunk size
// to increase the probability of reproducing the problem.
tk.MustExec("set tidb_max_chunk_size = 32")
tk.MustExec("set tidb_projection_concurrency = 20")
for i := 0; i < 10; i++ {
err := tk.QueryToErr("with recursive cte(iter, first, second, result) as " +
"(select 1, first, second, first+second from src " +
" union all " +
"select iter+1, second, result, second+result from cte where iter < 80 )" +
"select * from cte")
require.True(t, terror.ErrorEqual(err, types.ErrOverflow))
}
}
// https://github.com/pingcap/tidb/issues/33965.
func TestCTEsInView(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test;")
tk.MustExec("create database if not exists test1;")
tk.MustExec("create table test.t (a int);")
tk.MustExec("create table test1.t (a int);")
tk.MustExec("insert into test.t values (1);")
tk.MustExec("insert into test1.t values (2);")
tk.MustExec("use test;")
tk.MustExec("create definer='root'@'localhost' view test.v as with tt as (select * from t) select * from tt;")
tk.MustQuery("select * from test.v;").Check(testkit.Rows("1"))
tk.MustExec("use test1;")
tk.MustQuery("select * from test.v;").Check(testkit.Rows("1"))
}