wehub-resource-sync
86 lines
3.2 KiB
Go
86 lines
3.2 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/core/id"
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"github.com/dolthub/doltgresql/core"
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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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// initNextVal registers the functions to the catalog.
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func initNextVal() {
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framework.RegisterFunction(nextval_text)
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framework.RegisterFunction(nextval_regclass)
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}
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// nextval_text represents the PostgreSQL function of the same name, taking the same parameters.
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//
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// TODO: Even though we can implicitly convert a text param to a regclass param, it's an expensive process
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// to convert it to a regclass, then convert the regclass back into the relation name, so we provide an overload
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// that takes a text param directly, in addition to the function form that takes a regclass. Once we can optimize
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// the regclass to text conversion, we can potentially remove this overload.
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var nextval_text = framework.Function1{
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Name: "nextval",
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Return: pgtypes.Int64,
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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, val any) (any, error) {
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schema, sequence, err := ParseRelationName(ctx, val.(string))
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if err != nil {
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return nil, err
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}
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// TODO: this needs a database name to support inserts into other databases (including inserts on other branches than the current one)
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collection, err := core.GetSequencesCollectionFromContext(ctx, ctx.GetCurrentDatabase())
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if err != nil {
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return nil, err
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}
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return collection.NextVal(ctx, id.NewSequence(schema, sequence))
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},
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}
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// nextval_regclass represents the PostgreSQL function of the same name, taking the same parameters.
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var nextval_regclass = framework.Function1{
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Name: "nextval",
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Return: pgtypes.Int64,
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Parameters: [1]*pgtypes.DoltgresType{pgtypes.Regclass},
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IsNonDeterministic: true,
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Strict: true,
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Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
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relationName, err := pgtypes.Regclass.IoOutput(ctx, val)
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if err != nil {
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return nil, err
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}
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schema, sequence, err := ParseRelationName(ctx, relationName)
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if err != nil {
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return nil, err
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}
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// TODO: this needs a database name to support inserts into other databases (including inserts on other branches than the current one)
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collection, err := core.GetSequencesCollectionFromContext(ctx, ctx.GetCurrentDatabase())
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if err != nil {
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return nil, err
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}
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return collection.NextVal(ctx, id.NewSequence(schema, sequence))
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},
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}
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