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round.go
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round.go
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// Copyright 2023 Dolthub, 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,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package functions
import (
"math"
"github.com/shopspring/decimal"
"github.com/dolthub/doltgresql/server/functions/framework"
pgtypes "github.com/dolthub/doltgresql/server/types"
)
// initRound registers the functions to the catalog.
func initRound() {
framework.RegisterFunction(round_float64)
framework.RegisterFunction(round_numeric)
framework.RegisterFunction(round_numeric_int64)
}
// round_float64 represents the PostgreSQL function of the same name, taking the same parameters.
var round_float64 = framework.Function1{
Name: "round",
Return: pgtypes.Float64,
Parameters: []pgtypes.DoltgresType{pgtypes.Float64},
Callable: func(ctx framework.Context, val1 any) (any, error) {
if val1 == nil {
return nil, nil
}
return math.RoundToEven(val1.(float64)), nil
},
}
// round_numeric represents the PostgreSQL function of the same name, taking the same parameters.
var round_numeric = framework.Function1{
Name: "round",
Return: pgtypes.Numeric,
Parameters: []pgtypes.DoltgresType{pgtypes.Numeric},
Callable: func(ctx framework.Context, val1 any) (any, error) {
if val1 == nil {
return nil, nil
}
return val1.(decimal.Decimal).Round(0), nil
},
}
// round_numeric_int64 represents the PostgreSQL function of the same name, taking the same parameters.
var round_numeric_int64 = framework.Function2{
Name: "round",
Return: pgtypes.Numeric,
Parameters: []pgtypes.DoltgresType{pgtypes.Numeric, pgtypes.Int64},
Callable: func(ctx framework.Context, val1 any, val2 any) (any, error) {
if val1 == nil {
return nil, nil
}
return val1.(decimal.Decimal).Round(int32(val2.(int64))), nil
},
}