47 lines
1.8 KiB
Go
47 lines
1.8 KiB
Go
// Copyright 2019 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,
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package executor_test
|
|
|
|
import (
|
|
. "github.com/pingcap/check"
|
|
"github.com/pingcap/tidb/util/testkit"
|
|
)
|
|
|
|
func (s *testSuite2) TestSortRand(c *C) {
|
|
tk := testkit.NewTestKit(c, s.store)
|
|
tk.MustExec("use test")
|
|
tk.MustExec("drop table if exists t")
|
|
tk.MustExec("create table t(a int, b int);")
|
|
|
|
tk.MustQuery("explain select a from t order by rand()").Check(testkit.Rows(
|
|
"Projection_8 10000.00 root test.t.a",
|
|
"└─Sort_4 10000.00 root col_1:asc",
|
|
" └─Projection_9 10000.00 root test.t.a, rand()",
|
|
" └─TableReader_7 10000.00 root data:TableScan_6",
|
|
" └─TableScan_6 10000.00 cop table:t, range:[-inf,+inf], keep order:false, stats:pseudo",
|
|
))
|
|
|
|
tk.MustQuery("explain select a, b from t order by abs(2)").Check(testkit.Rows(
|
|
"TableReader_8 10000.00 root data:TableScan_7",
|
|
"└─TableScan_7 10000.00 cop table:t, range:[-inf,+inf], keep order:false, stats:pseudo"))
|
|
|
|
tk.MustQuery("explain select a from t order by abs(rand())+1").Check(testkit.Rows(
|
|
"Projection_8 10000.00 root test.t.a",
|
|
"└─Sort_4 10000.00 root col_1:asc",
|
|
" └─Projection_9 10000.00 root test.t.a, plus(abs(rand()), 1)",
|
|
" └─TableReader_7 10000.00 root data:TableScan_6",
|
|
" └─TableScan_6 10000.00 cop table:t, range:[-inf,+inf], keep order:false, stats:pseudo",
|
|
))
|
|
}
|