30 lines
986 B
Go
30 lines
986 B
Go
// Copyright 2018 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 aggregation
|
|
|
|
import (
|
|
"github.com/pingcap/tidb/expression"
|
|
"github.com/pingcap/tidb/sessionctx"
|
|
)
|
|
|
|
// WindowFuncDesc describes a window function signature, only used in planner.
|
|
type WindowFuncDesc struct {
|
|
baseFuncDesc
|
|
}
|
|
|
|
// NewWindowFuncDesc creates a window function signature descriptor.
|
|
func NewWindowFuncDesc(ctx sessionctx.Context, name string, args []expression.Expression) *WindowFuncDesc {
|
|
return &WindowFuncDesc{newBaseFuncDesc(ctx, name, args)}
|
|
}
|