wehub-resource-sync
63 lines
2.0 KiB
Go
63 lines
2.0 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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// initLtrim registers the functions to the catalog.
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func initLtrim() {
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framework.RegisterFunction(ltrim_text)
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framework.RegisterFunction(ltrim_text_text)
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}
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// ltrim_text represents the PostgreSQL function of the same name, taking the same parameters.
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var ltrim_text = framework.Function1{
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Name: "ltrim",
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Return: pgtypes.Text,
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Parameters: [1]*pgtypes.DoltgresType{pgtypes.Text},
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Strict: true,
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Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val1 any) (any, error) {
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var unusedTypes [3]*pgtypes.DoltgresType
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return ltrim_text_text.Callable(ctx, unusedTypes, val1, " ")
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},
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}
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// ltrim_text_text represents the PostgreSQL function of the same name, taking the same parameters.
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var ltrim_text_text = framework.Function2{
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Name: "ltrim",
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Return: pgtypes.Text,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Text, pgtypes.Text},
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Strict: true,
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Callable: func(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, str any, characters any) (any, error) {
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runes := []rune(str.(string))
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trimChars := make(map[rune]struct{})
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for _, c := range characters.(string) {
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trimChars[c] = struct{}{}
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}
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trimIdx := 0
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for ; trimIdx < len(runes); trimIdx++ {
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if _, ok := trimChars[runes[trimIdx]]; !ok {
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break
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}
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}
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return string(runes[trimIdx:]), nil
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},
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}
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