wehub-resource-sync
80 lines
2.1 KiB
Go
80 lines
2.1 KiB
Go
// Copyright 2023 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 ast
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import (
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"strings"
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"github.com/cockroachdb/errors"
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vitess "github.com/dolthub/vitess/go/vt/sqlparser"
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"github.com/dolthub/doltgresql/postgres/parser/sem/tree"
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)
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// nodeCreateIndex handles *tree.CreateIndex nodes.
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func nodeCreateIndex(ctx *Context, node *tree.CreateIndex) (*vitess.AlterTable, error) {
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if node == nil {
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return nil, nil
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}
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if node.Concurrently {
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return nil, errors.Errorf("concurrent index creation is not yet supported")
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}
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if node.Using != "" && strings.ToLower(node.Using) != "btree" {
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return nil, errors.Errorf("index method %s is not yet supported", node.Using)
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}
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indexDef, err := nodeIndexTableDef(ctx, &tree.IndexTableDef{
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Name: node.Name,
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Columns: node.Columns,
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IndexParams: node.IndexParams,
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})
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if err != nil {
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return nil, err
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}
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tableName, err := nodeTableName(ctx, &node.Table)
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if err != nil {
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return nil, err
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}
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var indexType string
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if node.Unique {
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indexType = vitess.UniqueStr
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}
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var predicate vitess.Expr
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if node.Predicate != nil {
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predicate, err = nodeExpr(ctx, node.Predicate)
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if err != nil {
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return nil, err
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}
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}
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return &vitess.AlterTable{
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Table: tableName,
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Statements: []*vitess.DDL{
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{
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Action: vitess.AlterStr,
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Table: tableName,
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IfNotExists: node.IfNotExists,
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IndexSpec: &vitess.IndexSpec{
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Action: vitess.CreateStr,
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FromName: indexDef.Info.Name,
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ToName: indexDef.Info.Name,
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Type: indexType,
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Fields: indexDef.Fields,
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Options: indexDef.Options,
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Predicate: predicate,
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},
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},
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},
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}, nil
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}
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