// 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/hanchuanchuan/goInception/sessionctx/stmtctx" "github.com/hanchuanchuan/goInception/types" "github.com/hanchuanchuan/goInception/util/chunk" "github.com/pingcap/errors" ) type bitOrFunction struct { aggFunction } func (bf *bitOrFunction) CreateContext(sc *stmtctx.StatementContext) *AggEvaluateContext { evalCtx := bf.aggFunction.CreateContext(sc) evalCtx.Value.SetUint64(0) return evalCtx } func (bf *bitOrFunction) ResetContext(sc *stmtctx.StatementContext, evalCtx *AggEvaluateContext) { evalCtx.Value.SetUint64(0) } // Update implements Aggregation interface. func (bf *bitOrFunction) Update(evalCtx *AggEvaluateContext, sc *stmtctx.StatementContext, row chunk.Row) error { a := bf.Args[0] value, err := a.Eval(row) if err != nil { return errors.Trace(err) } if !value.IsNull() { if value.Kind() == types.KindUint64 { evalCtx.Value.SetUint64(evalCtx.Value.GetUint64() | value.GetUint64()) } else { int64Value, err := value.ToInt64(sc) if err != nil { return errors.Trace(err) } evalCtx.Value.SetUint64(evalCtx.Value.GetUint64() | uint64(int64Value)) } } return nil } // GetResult implements Aggregation interface. func (bf *bitOrFunction) GetResult(evalCtx *AggEvaluateContext) types.Datum { return evalCtx.Value } // GetPartialResult implements Aggregation interface. func (bf *bitOrFunction) GetPartialResult(evalCtx *AggEvaluateContext) []types.Datum { return []types.Datum{bf.GetResult(evalCtx)} }