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mod.go
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mod.go
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// Copyright 2024 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 (
"fmt"
"github.com/shopspring/decimal"
"github.com/dolthub/doltgresql/server/functions/framework"
pgtypes "github.com/dolthub/doltgresql/server/types"
)
// initMod registers the functions to the catalog.
func initMod() {
framework.RegisterFunction(mod_int16_int16)
framework.RegisterFunction(mod_int32_int32)
framework.RegisterFunction(mod_int64_int64)
framework.RegisterFunction(mod_numeric_numeric)
}
// mod_int16_int16 represents the PostgreSQL function of the same name, taking the same parameters.
var mod_int16_int16 = framework.Function2{
Name: "mod",
Return: pgtypes.Int16,
Parameters: []pgtypes.DoltgresType{pgtypes.Int16, pgtypes.Int16},
Callable: func(ctx framework.Context, val1 any, val2 any) (any, error) {
if val1 == nil || val2 == nil {
return nil, nil
}
if val2.(int16) == 0 {
return nil, fmt.Errorf("division by zero")
}
return val1.(int16) % val2.(int16), nil
},
}
// mod_int32_int32 represents the PostgreSQL function of the same name, taking the same parameters.
var mod_int32_int32 = framework.Function2{
Name: "mod",
Return: pgtypes.Int32,
Parameters: []pgtypes.DoltgresType{pgtypes.Int32, pgtypes.Int32},
Callable: func(ctx framework.Context, val1 any, val2 any) (any, error) {
if val1 == nil || val2 == nil {
return nil, nil
}
if val2.(int32) == 0 {
return nil, fmt.Errorf("division by zero")
}
return val1.(int32) % val2.(int32), nil
},
}
// mod_int64_int64 represents the PostgreSQL function of the same name, taking the same parameters.
var mod_int64_int64 = framework.Function2{
Name: "mod",
Return: pgtypes.Int64,
Parameters: []pgtypes.DoltgresType{pgtypes.Int64, pgtypes.Int64},
Callable: func(ctx framework.Context, val1 any, val2 any) (any, error) {
if val1 == nil || val2 == nil {
return nil, nil
}
if val2.(int64) == 0 {
return nil, fmt.Errorf("division by zero")
}
return val1.(int64) % val2.(int64), nil
},
}
// mod_numeric_numeric represents the PostgreSQL function of the same name, taking the same parameters.
var mod_numeric_numeric = framework.Function2{
Name: "mod",
Return: pgtypes.Numeric,
Parameters: []pgtypes.DoltgresType{pgtypes.Numeric, pgtypes.Numeric},
Callable: func(ctx framework.Context, val1 any, val2 any) (any, error) {
if val1 == nil || val2 == nil {
return nil, nil
}
if val2.(decimal.Decimal).Cmp(decimal.Zero) == 0 {
return nil, fmt.Errorf("division by zero")
}
return val1.(decimal.Decimal).Mod(val2.(decimal.Decimal)), nil
},
}