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rpad.go
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rpad.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 (
"github.com/dolthub/doltgresql/server/functions/framework"
pgtypes "github.com/dolthub/doltgresql/server/types"
)
// initRpad registers the functions to the catalog.
func initRpad() {
framework.RegisterFunction(rpad_varchar_int32)
framework.RegisterFunction(rpad_varchar_int32_varchar)
}
// rpad_varchar_int32 represents the PostgreSQL function of the same name, taking the same parameters.
var rpad_varchar_int32 = framework.Function2{
Name: "rpad",
Return: pgtypes.VarChar,
Parameters: []pgtypes.DoltgresType{pgtypes.VarChar, pgtypes.Int32},
Callable: func(ctx framework.Context, val1 any, val2 any) (any, error) {
return rpad_varchar_int32_varchar.Callable(ctx, val1, val2, " ")
},
}
// rpad_varchar_int32_varchar represents the PostgreSQL function of the same name, taking the same parameters.
var rpad_varchar_int32_varchar = framework.Function3{
Name: "rpad",
Return: pgtypes.VarChar,
Parameters: []pgtypes.DoltgresType{pgtypes.VarChar, pgtypes.Int32, pgtypes.VarChar},
Callable: func(ctx framework.Context, str any, length any, fill any) (any, error) {
if str == nil || length == nil || fill == nil {
return nil, nil
}
if length.(int32) <= 0 {
return "", nil
}
runes := []rune(str.(string))
fillRunes := []rune(fill.(string))
for int32(len(runes)) < length.(int32) {
runes = append(runes, fillRunes...)
}
return string(runes[:length.(int32)]), nil
},
}