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transaction_idx.go
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transaction_idx.go
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// Copyright (C) 2022 PuzzleDB Contributors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package store
import (
"github.com/cybergarage/puzzledb-go/puzzledb/context"
"github.com/cybergarage/puzzledb-go/puzzledb/document"
"github.com/cybergarage/puzzledb-go/puzzledb/store"
"github.com/cybergarage/puzzledb-go/puzzledb/store/kv"
)
// InsertIndex puts a secondary index with the primary key.
func (txn *transaction) InsertIndex(ctx context.Context, idxKey store.Key, docKey store.Key) error {
ctx.StartSpan("InsertIndex")
defer ctx.FinishSpan()
kvDocKey := kv.NewKeyWith(kv.DocumentKeyHeader, docKey)
kvDocKeyBytes, err := txn.EncodeKey(kvDocKey)
if err != nil {
return err
}
kvIdxKey := kv.NewKeyWith(kv.SecondaryIndexHeader, idxKey)
kvObj := kv.Object{
Key: kvIdxKey,
Value: kvDocKeyBytes,
}
return txn.kv.Set(&kvObj)
}
// RemoveIndex removes the specified secondary index.
func (txn *transaction) RemoveIndex(ctx context.Context, idxKey store.Key) error {
ctx.StartSpan("RemoveIndex")
defer ctx.FinishSpan()
kvIdxKey := kv.NewKeyWith(kv.SecondaryIndexHeader, idxKey)
return wrapKeyNotExistError(idxKey, txn.kv.Remove(kvIdxKey))
}
// FindDocumentsByIndex gets document objects matching the specified index key.
func (txn *transaction) FindDocumentsByIndex(ctx context.Context, idxKey store.Key, opts ...store.Option) (store.ResultSet, error) {
ctx.StartSpan("FindDocumentsByIndex")
defer ctx.FinishSpan()
kvIdxKey := kv.NewKeyWith(kv.SecondaryIndexHeader, idxKey)
kvOpts := NewKvOptionsWith(opts...)
kvIdxRs, err := txn.kv.GetRange(kvIdxKey, kvOpts...)
if err != nil {
return nil, err
}
return newIndexResultSet(txn, txn.KeyCoder, txn.Coder, kvIdxRs), nil
}
// TruncateIndexes removes all secondary indexes.
func (txn *transaction) TruncateIndexes(ctx context.Context) error {
ctx.StartSpan("TruncateIndexes")
defer ctx.FinishSpan()
kvSchemaKey := kv.NewKeyWith(kv.SecondaryIndexHeader, document.NewKeyWith(txn.Database().Name()))
return txn.kv.RemoveRange(kvSchemaKey)
}