mirror of
https://github.com/featurebasedb/featurebase.git
synced 2026-08-28 10:54:59 +00:00
65 lines
1.9 KiB
Go
65 lines
1.9 KiB
Go
// Copyright 2020 Pilosa Corp.
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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 sql
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import (
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"context"
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"fmt"
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"github.com/pilosa/pilosa/v2"
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pproto "github.com/pilosa/pilosa/v2/proto"
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"github.com/pkg/errors"
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"vitess.io/vitess/go/vt/sqlparser"
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)
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// DDLHandler executes CREATE, ALTER, DROP, RENAME, TRUNCATE or ANALYZE statement.
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type DDLHandler struct {
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api *pilosa.API
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}
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// NewDDLHandler constructor
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func NewDDLHandler(api *pilosa.API) *DDLHandler {
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return &DDLHandler{
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api: api,
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}
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}
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// Handle executes mapped SQL
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func (h *DDLHandler) Handle(ctx context.Context, mapped *MappedSQL) (pproto.StreamClient, error) {
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stmt, ok := mapped.Statement.(*sqlparser.DDL)
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if !ok {
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return nil, fmt.Errorf("statement is not type DDL: %T", mapped.Statement)
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}
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switch stmt.Action {
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case sqlparser.DropStr:
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return h.execDropTable(ctx, stmt)
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default:
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return nil, errors.Errorf("unsupported DDL action: %s", stmt.Action)
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}
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}
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func (h *DDLHandler) execDropTable(ctx context.Context, stmt *sqlparser.DDL) (pproto.StreamClient, error) {
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if n := len(stmt.FromTables); n != 1 {
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return nil, fmt.Errorf("statement can only contain a single drop table, but got: %d", n)
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}
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indexName := stmt.FromTables[0].ToViewName().Name.String()
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if err := h.api.DeleteIndex(ctx, indexName); err != nil {
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return nil, errors.Wrapf(err, "deleting index %s", indexName)
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}
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return pproto.EmptyStream{}, nil
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}
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