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 25/* A table mapping representation hashes to locations in a rev file. */ 26CREATE TABLE rep_cache ( 27 hash TEXT NOT NULL PRIMARY KEY, 28 revision INTEGER NOT NULL, 29 offset INTEGER NOT NULL, 30 size INTEGER NOT NULL, 31 expanded_size INTEGER NOT NULL 32 ); 33 34PRAGMA USER_VERSION = 1; 35 36 37-- STMT_GET_REP 38SELECT revision, offset, size, expanded_size 39FROM rep_cache 40WHERE hash = ?1 41 42-- STMT_SET_REP 43INSERT OR FAIL INTO rep_cache (hash, revision, offset, size, expanded_size) 44VALUES (?1, ?2, ?3, ?4, ?5) 45 46-- STMT_GET_REPS_FOR_RANGE 47SELECT hash, revision, offset, size, expanded_size 48FROM rep_cache 49WHERE revision >= ?1 AND revision <= ?2 50 51-- STMT_GET_MAX_REV 52SELECT MAX(revision) 53FROM rep_cache 54 55-- STMT_DEL_REPS_YOUNGER_THAN_REV 56DELETE FROM rep_cache 57WHERE revision > ?1 58 59/* An INSERT takes an SQLite reserved lock that prevents other writes 60 but doesn't block reads. The incomplete transaction means that no 61 permanent change is made to the database and the transaction is 62 removed when the database is closed. */ 63-- STMT_LOCK_REP 64BEGIN TRANSACTION; 65INSERT INTO rep_cache VALUES ('dummy', 0, 0, 0, 0) 66