wehub-resource-sync
87 lines
2.8 KiB
Go
87 lines
2.8 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/cockroachdb/errors"
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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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// initCurrentSetting registers the functions to the catalog.
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func initCurrentSetting() {
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framework.RegisterFunction(current_setting_text)
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framework.RegisterFunction(current_setting_text_bool)
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}
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// current_setting_text represents the PostgreSQL function of the same name, taking the same parameters.
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var current_setting_text = framework.Function1{
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Name: "current_setting",
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Return: pgtypes.Text, // TODO: it would be nice to support non-text values as well, but this is all postgres supports
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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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return getCurSetting(ctx, val1.(string), false)
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},
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}
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// current_setting_text_bool represents the PostgreSQL function of the same name, taking the same parameters.
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var current_setting_text_bool = framework.Function2{
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Name: "current_setting",
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Return: pgtypes.Text, // TODO: it would be nice to support non-text values as well, but this is all postgres supports
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Text, pgtypes.Bool},
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Strict: true,
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Callable: func(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1, val2 any) (any, error) {
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return getCurSetting(ctx, val1.(string), val2.(bool))
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},
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}
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// getCurSetting returns value set for given user variable. It returns nil instead of an error
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// if it doesn't exist and missingOk is set to true.
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func getCurSetting(ctx *sql.Context, s string, missingOk bool) (any, error) {
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_, variable, err := ctx.GetUserVariable(ctx, s)
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if err != nil {
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if missingOk {
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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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if variable != nil {
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return fmt.Sprintf("%v", variable), nil
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}
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variable, err = ctx.GetSessionVariable(ctx, s)
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if err != nil {
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if missingOk {
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return nil, nil
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}
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return nil, errors.Errorf(`unrecognized configuration parameter "%s"`, s)
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}
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if variable != nil {
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return fmt.Sprintf("%v", variable), nil
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}
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if missingOk {
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return nil, nil
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}
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return nil, errors.Errorf(`unrecognized configuration parameter "%s"`, s)
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}
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