You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
114 lines
5.5 KiB
114 lines
5.5 KiB
// 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 aggfuncs_test
|
|
|
|
import (
|
|
. "github.com/pingcap/check"
|
|
"github.com/pingcap/parser/ast"
|
|
"github.com/pingcap/parser/mysql"
|
|
"github.com/pingcap/tidb/expression"
|
|
"github.com/pingcap/tidb/types"
|
|
)
|
|
|
|
func (s *testSuite) TestLeadLag(c *C) {
|
|
zero := expression.NewZero()
|
|
one := expression.NewOne()
|
|
two := &expression.Constant{
|
|
Value: types.NewDatum(2),
|
|
RetType: types.NewFieldType(mysql.TypeTiny),
|
|
}
|
|
three := &expression.Constant{
|
|
Value: types.NewDatum(3),
|
|
RetType: types.NewFieldType(mysql.TypeTiny),
|
|
}
|
|
million := &expression.Constant{
|
|
Value: types.NewDatum(1000000),
|
|
RetType: types.NewFieldType(mysql.TypeLong),
|
|
}
|
|
defaultArg := &expression.Column{RetType: types.NewFieldType(mysql.TypeLonglong), Index: 0}
|
|
|
|
numRows := 3
|
|
tests := []windowTest{
|
|
// lag(field0, N)
|
|
buildWindowTesterWithArgs(ast.WindowFuncLag, mysql.TypeLonglong,
|
|
[]expression.Expression{zero}, 0, numRows, 0, 1, 2),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLag, mysql.TypeLonglong,
|
|
[]expression.Expression{one}, 0, numRows, nil, 0, 1),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLag, mysql.TypeLonglong,
|
|
[]expression.Expression{two}, 0, numRows, nil, nil, 0),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLag, mysql.TypeLonglong,
|
|
[]expression.Expression{three}, 0, numRows, nil, nil, nil),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLag, mysql.TypeLonglong,
|
|
[]expression.Expression{million}, 0, numRows, nil, nil, nil),
|
|
// lag(field0, N, 1000000)
|
|
buildWindowTesterWithArgs(ast.WindowFuncLag, mysql.TypeLonglong,
|
|
[]expression.Expression{zero, million}, 0, numRows, 0, 1, 2),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLag, mysql.TypeLonglong,
|
|
[]expression.Expression{one, million}, 0, numRows, 1000000, 0, 1),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLag, mysql.TypeLonglong,
|
|
[]expression.Expression{two, million}, 0, numRows, 1000000, 1000000, 0),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLag, mysql.TypeLonglong,
|
|
[]expression.Expression{three, million}, 0, numRows, 1000000, 1000000, 1000000),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLag, mysql.TypeLonglong,
|
|
[]expression.Expression{million, million}, 0, numRows, 1000000, 1000000, 1000000),
|
|
// lag(field0, N, field0)
|
|
buildWindowTesterWithArgs(ast.WindowFuncLag, mysql.TypeLonglong,
|
|
[]expression.Expression{zero, defaultArg}, 0, numRows, 0, 1, 2),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLag, mysql.TypeLonglong,
|
|
[]expression.Expression{one, defaultArg}, 0, numRows, 0, 0, 1),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLag, mysql.TypeLonglong,
|
|
[]expression.Expression{two, defaultArg}, 0, numRows, 0, 1, 0),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLag, mysql.TypeLonglong,
|
|
[]expression.Expression{three, defaultArg}, 0, numRows, 0, 1, 2),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLag, mysql.TypeLonglong,
|
|
[]expression.Expression{million, defaultArg}, 0, numRows, 0, 1, 2),
|
|
|
|
// lead(field0, N)
|
|
buildWindowTesterWithArgs(ast.WindowFuncLead, mysql.TypeLonglong,
|
|
[]expression.Expression{zero}, 0, numRows, 0, 1, 2),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLead, mysql.TypeLonglong,
|
|
[]expression.Expression{one}, 0, numRows, 1, 2, nil),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLead, mysql.TypeLonglong,
|
|
[]expression.Expression{two}, 0, numRows, 2, nil, nil),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLead, mysql.TypeLonglong,
|
|
[]expression.Expression{three}, 0, numRows, nil, nil, nil),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLead, mysql.TypeLonglong,
|
|
[]expression.Expression{million}, 0, numRows, nil, nil, nil),
|
|
// lead(field0, N, 1000000)
|
|
buildWindowTesterWithArgs(ast.WindowFuncLead, mysql.TypeLonglong,
|
|
[]expression.Expression{zero, million}, 0, numRows, 0, 1, 2),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLead, mysql.TypeLonglong,
|
|
[]expression.Expression{one, million}, 0, numRows, 1, 2, 1000000),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLead, mysql.TypeLonglong,
|
|
[]expression.Expression{two, million}, 0, numRows, 2, 1000000, 1000000),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLead, mysql.TypeLonglong,
|
|
[]expression.Expression{three, million}, 0, numRows, 1000000, 1000000, 1000000),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLead, mysql.TypeLonglong,
|
|
[]expression.Expression{million, million}, 0, numRows, 1000000, 1000000, 1000000),
|
|
// lead(field0, N, field0)
|
|
buildWindowTesterWithArgs(ast.WindowFuncLead, mysql.TypeLonglong,
|
|
[]expression.Expression{zero, defaultArg}, 0, numRows, 0, 1, 2),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLead, mysql.TypeLonglong,
|
|
[]expression.Expression{one, defaultArg}, 0, numRows, 1, 2, 2),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLead, mysql.TypeLonglong,
|
|
[]expression.Expression{two, defaultArg}, 0, numRows, 2, 1, 2),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLead, mysql.TypeLonglong,
|
|
[]expression.Expression{three, defaultArg}, 0, numRows, 0, 1, 2),
|
|
buildWindowTesterWithArgs(ast.WindowFuncLead, mysql.TypeLonglong,
|
|
[]expression.Expression{million, defaultArg}, 0, numRows, 0, 1, 2),
|
|
}
|
|
for _, test := range tests {
|
|
s.testWindowFunc(c, test)
|
|
}
|
|
}
|
|
|