/* -*- Mode: idl; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (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.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is Oracle Corporation code. * * The Initial Developer of the Original Code is * Oracle Corporation * Portions created by the Initial Developer are Copyright (C) 2004 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Vladimir Vukicevic * Brett Wilson * * Alternatively, the contents of this file may be used under the terms of * either the GNU General Public License Version 2 or later (the "GPL"), or * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ #include "nsISupports.idl" interface mozIStorageFunction; interface mozIStorageStatement; interface nsIFile; /** * mozIStorageConnection represents a database connection attached to * a specific file or to the in-memory data storage. It is the * primary interface for interacting with a database, including * creating prepared statements, executing SQL, and examining database * errors. */ [scriptable, uuid(77015f88-bfc2-4669-b1c3-cc19fb07cd4e)] interface mozIStorageConnection : nsISupports { /* * Initialization and status */ /** * whether the database is open or not */ readonly attribute boolean connectionReady; /** * The current database nsIFile. Null if the database * connection refers to an in-memory database. */ readonly attribute nsIFile databaseFile; /** * lastInsertRowID returns the row ID from the last INSERT * operation. */ readonly attribute long long lastInsertRowID; /** * The last error SQLite error code. */ readonly attribute long lastError; /** * The last SQLite error as a string (in english, straight from the * sqlite library). */ readonly attribute AUTF8String lastErrorString; /* * Statement creation */ /** * Create a mozIStorageStatement for the given SQL expression. The * expression may use ? to indicate sequential numbered arguments, * or :name and $var to indicate named arguments. * * @param aSQLStatement The SQL statement to execute * * @returns a new mozIStorageStatement */ mozIStorageStatement createStatement(in AUTF8String aSQLStatement); /** * Execute a SQL expression, expecting no arguments. * * @param aSQLStatement The SQL statement to execute */ void executeSimpleSQL(in AUTF8String aSQLStatement); /** * Check if the given table exists. * * @param aTableName The table to check * @returns TRUE if table exists, FALSE otherwise. */ boolean tableExists(in AUTF8String aTableName); /** * Check if the given index exists. * * @param aIndexName The index to check * @returns TRUE if the index exists, FALSE otherwise. */ boolean indexExists(in AUTF8String aIndexName); /* * Transactions */ /** * Returns true if a transaction is active on this connection. */ readonly attribute boolean transactionInProgress; /** * Begin a new transaction. sqlite default transactions are deferred. * If a transaction is active, throws an error. */ void beginTransaction(); /** * Begins a new transaction with the given type. */ const PRInt32 TRANSACTION_DEFERRED = 0; const PRInt32 TRANSACTION_IMMEDIATE = 1; const PRInt32 TRANSACTION_EXCLUSIVE = 2; void beginTransactionAs(in PRInt32 transactionType); /** * Commits the current transaction. If no transaction is active, * @throws NS_ERROR_STORAGE_NO_TRANSACTION. */ void commitTransaction(); /** * Rolls back the current transaction. If no transaction is active, * @throws NS_ERROR_STORAGE_NO_TRANSACTION. */ void rollbackTransaction(); /* * Tables */ /** * Create the table with the given name and schema. * * If the table already exists, NS_ERROR_FAILURE is thrown. * (XXX at some point in the future it will check if the schema is * the same as what is specified, but that doesn't happen currently.) * * @param aTableName the table name to be created, consisting of * [A-Za-z0-9_], and beginning with a letter. * * @param aTableSchema the schema of the table; what would normally * go between the parens in a CREATE TABLE statement: e.g., "foo * INTEGER, bar STRING". * * @throws NS_ERROR_FAILURE if the table already exists or could not * be created for any other reason. * */ void createTable(in string aTableName, in string aTableSchema); /* * Functions */ /** * Create a new SQLite function */ void createFunction(in string aFunctionName, in long aNumArguments, in mozIStorageFunction aFunction); /** * This is used to preload the database cache. It loads pages from the * start of the database file until the memory cache (specified by * "PRAGMA cache_size=") is full or the entire file is read. * * The cache MUST be active on the database for this to work. This means * that you must have a transaction open on the connection, or have a * transaction open on another connection that shares the same pager cache. * This cached data will go away when the transaction is closed. * * This preload operation can dramatically speed up read operations because * the data is loaded as one large block. Normally, pages are read in on * demand, which can cause many disk seeks. */ void preload(); };