wehub-resource-sync
60 lines
2.1 KiB
Go
60 lines
2.1 KiB
Go
// Copyright 2025 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 analyzer
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import (
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"github.com/dolthub/go-mysql-server/sql"
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"github.com/dolthub/go-mysql-server/sql/analyzer"
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"github.com/dolthub/go-mysql-server/sql/plan"
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"github.com/dolthub/go-mysql-server/sql/transform"
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)
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// convertDropPrimaryKeyConstraint converts a DropConstraint node dropping a primary key constraint into
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// an AlterPK node that GMS can process to remove the primary key.
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func convertDropPrimaryKeyConstraint(ctx *sql.Context, _ *analyzer.Analyzer, n sql.Node, _ *plan.Scope, _ analyzer.RuleSelector, _ *sql.QueryFlags) (sql.Node, transform.TreeIdentity, error) {
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return transform.Node(ctx, n, func(ctx *sql.Context, n sql.Node) (sql.Node, transform.TreeIdentity, error) {
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dropConstraint, ok := n.(*plan.DropConstraint)
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if !ok {
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return n, transform.SameTree, nil
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}
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rt, ok := dropConstraint.Child.(*plan.ResolvedTable)
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if !ok {
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return nil, transform.SameTree, analyzer.ErrInAnalysis.New(
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"Expected a TableNode for ALTER TABLE DROP CONSTRAINT statement")
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}
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table := rt.Table
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if it, ok := table.(sql.IndexAddressableTable); ok {
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indexes, err := it.GetIndexes(ctx)
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if err != nil {
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return nil, transform.SameTree, err
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}
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for _, index := range indexes {
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if index.ID() == "PRIMARY" && dropConstraint.Name == rt.Name()+"_pkey" {
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alterDropPk := plan.NewAlterDropPk(rt.Database(), rt)
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newNode, err := alterDropPk.WithTargetSchema(rt.Schema(ctx))
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if err != nil {
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return n, transform.SameTree, err
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}
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return newNode, transform.NewTree, nil
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}
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}
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}
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return n, transform.SameTree, nil
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})
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}
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