85 lines
2.3 KiB
Go
85 lines
2.3 KiB
Go
// Copyright 2017 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/juju/errors"
|
|
"github.com/pingcap/tidb/context"
|
|
"github.com/pingcap/tidb/expression"
|
|
"github.com/pingcap/tidb/mysql"
|
|
"github.com/pingcap/tidb/sessionctx/stmtctx"
|
|
"github.com/pingcap/tidb/types"
|
|
)
|
|
|
|
type bitOrFunction struct {
|
|
aggFunction
|
|
}
|
|
|
|
// Clone implements Aggregation interface.
|
|
func (bf *bitOrFunction) Clone() Aggregation {
|
|
nf := *bf
|
|
for i, arg := range bf.Args {
|
|
nf.Args[i] = arg.Clone()
|
|
}
|
|
return &nf
|
|
}
|
|
|
|
// CalculateDefaultValue implements Aggregation interface.
|
|
func (bf *bitOrFunction) CalculateDefaultValue(schema *expression.Schema, ctx context.Context) (d types.Datum, valid bool) {
|
|
arg := bf.Args[0]
|
|
result := expression.EvaluateExprWithNull(ctx, schema, arg)
|
|
if con, ok := result.(*expression.Constant); ok {
|
|
if con.Value.IsNull() {
|
|
return types.NewDatum(0), true
|
|
}
|
|
return con.Value, true
|
|
}
|
|
return types.NewDatum(0), true
|
|
}
|
|
|
|
// GetType implements Aggregation interface.
|
|
func (bf *bitOrFunction) GetType() *types.FieldType {
|
|
ft := types.NewFieldType(mysql.TypeLonglong)
|
|
ft.Flen = 21
|
|
types.SetBinChsClnFlag(ft)
|
|
ft.Flag |= mysql.UnsignedFlag | mysql.NotNullFlag
|
|
return ft
|
|
}
|
|
|
|
// Update implements Aggregation interface.
|
|
func (bf *bitOrFunction) Update(ctx *AggEvaluateContext, sc *stmtctx.StatementContext, row types.Row) error {
|
|
a := bf.Args[0]
|
|
value, err := a.Eval(row)
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
if ctx.Value.IsNull() {
|
|
ctx.Value.SetUint64(0)
|
|
}
|
|
if !value.IsNull() {
|
|
ctx.Value.SetUint64(ctx.Value.GetUint64() | value.GetUint64())
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// GetResult implements Aggregation interface.
|
|
func (bf *bitOrFunction) GetResult(ctx *AggEvaluateContext) types.Datum {
|
|
return ctx.Value
|
|
}
|
|
|
|
// GetPartialResult implements Aggregation interface.
|
|
func (bf *bitOrFunction) GetPartialResult(ctx *AggEvaluateContext) []types.Datum {
|
|
return []types.Datum{bf.GetResult(ctx)}
|
|
}
|