wehub-resource-sync
57 lines
1.7 KiB
Go
57 lines
1.7 KiB
Go
// Copyright 2024 Dolthub, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package functions
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import (
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"github.com/dolthub/go-mysql-server/sql"
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"github.com/dolthub/doltgresql/server/functions/framework"
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pgtypes "github.com/dolthub/doltgresql/server/types"
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)
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// initTranslate registers the functions to the catalog.
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func initTranslate() {
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framework.RegisterFunction(translate_text_text_text)
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}
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// translate_text_text_text represents the PostgreSQL function of the same name, taking the same parameters.
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var translate_text_text_text = framework.Function3{
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Name: "translate",
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Return: pgtypes.Text,
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Parameters: [3]*pgtypes.DoltgresType{pgtypes.Text, pgtypes.Text, pgtypes.Text},
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Strict: true,
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Callable: func(ctx *sql.Context, _ [4]*pgtypes.DoltgresType, val1, val2, val3 any) (any, error) {
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str := val1.(string)
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from := []rune(val2.(string))
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to := []rune(val3.(string))
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toLen := len(to)
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fromMap := make(map[string]int)
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for i, l := range from {
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fromMap[string(l)] = i
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}
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var newStr []rune
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for _, l := range str {
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if idx, exists := fromMap[string(l)]; exists {
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if idx < toLen {
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newStr = append(newStr, to[idx])
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}
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} else {
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newStr = append(newStr, l)
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}
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}
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return string(newStr), nil
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},
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}
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