1/* rep-cache-db.sql -- schema for use in rep-caching
2 *   This is intended for use with SQLite 3
3 *
4 * ====================================================================
5 *    Licensed to the Apache Software Foundation (ASF) under one
6 *    or more contributor license agreements.  See the NOTICE file
7 *    distributed with this work for additional information
8 *    regarding copyright ownership.  The ASF licenses this file
9 *    to you under the Apache License, Version 2.0 (the
10 *    "License"); you may not use this file except in compliance
11 *    with the License.  You may obtain a copy of the License at
12 *
13 *      http://www.apache.org/licenses/LICENSE-2.0
14 *
15 *    Unless required by applicable law or agreed to in writing,
16 *    software distributed under the License is distributed on an
17 *    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
18 *    KIND, either express or implied.  See the License for the
19 *    specific language governing permissions and limitations
20 *    under the License.
21 * ====================================================================
22 */
23
24-- STMT_CREATE_SCHEMA
25PRAGMA PAGE_SIZE = 4096;
26
27/* A table mapping representation hashes to locations in a rev file. */
28CREATE TABLE rep_cache (
29  hash TEXT NOT NULL PRIMARY KEY,
30  revision INTEGER NOT NULL,
31  offset INTEGER NOT NULL,
32  size INTEGER NOT NULL,
33  expanded_size INTEGER NOT NULL
34  );
35
36PRAGMA USER_VERSION = 1;
37
38
39-- STMT_GET_REP
40SELECT revision, offset, size, expanded_size
41FROM rep_cache
42WHERE hash = ?1
43
44-- STMT_SET_REP
45INSERT OR FAIL INTO rep_cache (hash, revision, offset, size, expanded_size)
46VALUES (?1, ?2, ?3, ?4, ?5)
47
48-- STMT_GET_REPS_FOR_RANGE
49SELECT hash, revision, offset, size, expanded_size
50FROM rep_cache
51WHERE revision >= ?1 AND revision <= ?2
52
53-- STMT_GET_MAX_REV
54SELECT MAX(revision)
55FROM rep_cache
56
57-- STMT_DEL_REPS_YOUNGER_THAN_REV
58DELETE FROM rep_cache
59WHERE revision > ?1
60
61/* An INSERT takes an SQLite reserved lock that prevents other writes
62   but doesn't block reads.  The incomplete transaction means that no
63   permanent change is made to the database and the transaction is
64   removed when the database is closed.  */
65-- STMT_LOCK_REP
66BEGIN TRANSACTION;
67INSERT INTO rep_cache VALUES ('dummy', 0, 0, 0, 0)
68
69-- STMT_UNLOCK_REP
70ROLLBACK TRANSACTION;
71