wehub-resource-sync
48 lines
1.5 KiB
Go
48 lines
1.5 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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"fmt"
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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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// initLength registers the functions to the catalog.
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func initLength() {
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framework.RegisterFunction(length_text)
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}
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// length_text represents the PostgreSQL function of the same name, taking the same parameters.
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var length_text = framework.Function1{
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Name: "length",
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Return: pgtypes.Int32,
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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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val1str, ok, err := sql.Unwrap[string](ctx, val1)
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if err != nil {
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return nil, err
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}
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if !ok {
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return nil, fmt.Errorf("unexpected type for length input, expected string, got %T", val1)
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}
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return int32(len([]rune(val1str))), nil
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},
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}
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