wehub-resource-sync
56 lines
1.9 KiB
Go
56 lines
1.9 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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"strconv"
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"strings"
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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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// initToRegclass registers the functions to the catalog.
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func initToRegclass() {
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framework.RegisterFunction(to_regclass_text)
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}
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// to_regclass_text represents the PostgreSQL function of the same name, taking the same parameters.
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var to_regclass_text = framework.Function1{
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Name: "to_regclass",
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Return: pgtypes.Regclass,
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Parameters: [1]*pgtypes.DoltgresType{pgtypes.Text},
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IsNonDeterministic: true,
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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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// If the string just represents a number, then we return nil.
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if _, err := strconv.ParseUint(val1.(string), 10, 32); err == nil {
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return nil, nil
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}
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oid, err := pgtypes.Regclass.IoInput(ctx, val1.(string))
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if err != nil {
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// Specifically for the "does not exist" error, we return nil instead of the error.
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// https://www.postgresql.org/docs/15/functions-info.html#FUNCTIONS-INFO-CATALOG-TABLE
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if strings.Contains(err.Error(), "does not exist") {
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return nil, nil
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}
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return nil, err
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}
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return oid, nil
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},
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}
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