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771 lines
26 KiB
PHP
771 lines
26 KiB
PHP
<?php
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// vim: set et ts=4 sw=4 fdm=marker:
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// +----------------------------------------------------------------------+
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// | PHP versions 4 and 5 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox, |
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// | Stig. S. Bakken, Lukas Smith |
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// | All rights reserved. |
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// +----------------------------------------------------------------------+
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// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
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// | API as well as database abstraction for PHP applications. |
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// | This LICENSE is in the BSD license style. |
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// | |
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// | Redistribution and use in source and binary forms, with or without |
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// | modification, are permitted provided that the following conditions |
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// | are met: |
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// | |
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// | Redistributions of source code must retain the above copyright |
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// | notice, this list of conditions and the following disclaimer. |
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// | |
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// | Redistributions in binary form must reproduce the above copyright |
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// | notice, this list of conditions and the following disclaimer in the |
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// | documentation and/or other materials provided with the distribution. |
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// | |
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// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
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// | Lukas Smith nor the names of his contributors may be used to endorse |
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// | or promote products derived from this software without specific prior|
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// | written permission. |
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// | |
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// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
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// | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
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// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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// | POSSIBILITY OF SUCH DAMAGE. |
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// +----------------------------------------------------------------------+
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// | Author: Paul Cooper <pgc@ucecom.com> |
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// +----------------------------------------------------------------------+
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//
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// $Id$
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/**
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* MDB2 PostGreSQL driver
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*
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* @package MDB2
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* @category Database
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* @author Paul Cooper <pgc@ucecom.com>
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*/
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class MDB2_Driver_pgsql extends MDB2_Driver_Common
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{
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// {{{ properties
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var $escape_quotes = "\\";
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// }}}
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// {{{ constructor
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/**
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* Constructor
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*/
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function __construct()
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{
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parent::__construct();
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$this->phptype = 'pgsql';
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$this->dbsyntax = 'pgsql';
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$this->supported['sequences'] = true;
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$this->supported['indexes'] = true;
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$this->supported['affected_rows'] = true;
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$this->supported['summary_functions'] = true;
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$this->supported['order_by_text'] = true;
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$this->supported['transactions'] = true;
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$this->supported['current_id'] = true;
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$this->supported['limit_queries'] = true;
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$this->supported['LOBs'] = true;
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$this->supported['replace'] = 'emulated';
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$this->supported['sub_selects'] = true;
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$this->supported['auto_increment'] = 'emulated';
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$this->supported['primary_key'] = true;
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}
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// }}}
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// {{{ errorInfo()
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/**
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* This method is used to collect information about an error
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*
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* @param integer $error
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* @return array
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* @access public
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*/
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function errorInfo($error = null)
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{
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// Fall back to MDB2_ERROR if there was no mapping.
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$error_code = MDB2_ERROR;
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$native_msg = '';
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if (is_resource($error)) {
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$native_msg = @pg_result_error($error);
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} elseif ($this->connection) {
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$native_msg = @pg_last_error($this->connection);
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if (!$native_msg && @pg_connection_status($this->connection) === PGSQL_CONNECTION_BAD) {
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$native_msg = 'Database connection has been lost.';
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$error_code = MDB2_ERROR_CONNECT_FAILED;
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}
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}
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static $error_regexps;
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if (empty($error_regexps)) {
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$error_regexps = array(
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'/column .* (of relation .*)?does not exist/i'
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=> MDB2_ERROR_NOSUCHFIELD,
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'/(relation|sequence|table).*does not exist|class .* not found/i'
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=> MDB2_ERROR_NOSUCHTABLE,
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'/index .* does not exist/'
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=> MDB2_ERROR_NOT_FOUND,
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'/relation .* already exists/i'
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=> MDB2_ERROR_ALREADY_EXISTS,
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'/(divide|division) by zero$/i'
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=> MDB2_ERROR_DIVZERO,
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'/pg_atoi: error in .*: can\'t parse /i'
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=> MDB2_ERROR_INVALID_NUMBER,
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'/invalid input syntax for( type)? (integer|numeric)/i'
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=> MDB2_ERROR_INVALID_NUMBER,
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'/value .* is out of range for type \w*int/i'
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=> MDB2_ERROR_INVALID_NUMBER,
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'/integer out of range/i'
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=> MDB2_ERROR_INVALID_NUMBER,
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'/value too long for type character/i'
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=> MDB2_ERROR_INVALID,
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'/attribute .* not found|relation .* does not have attribute/i'
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=> MDB2_ERROR_NOSUCHFIELD,
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'/column .* specified in USING clause does not exist in (left|right) table/i'
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=> MDB2_ERROR_NOSUCHFIELD,
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'/parser: parse error at or near/i'
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=> MDB2_ERROR_SYNTAX,
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'/syntax error at/'
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=> MDB2_ERROR_SYNTAX,
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'/column reference .* is ambiguous/i'
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=> MDB2_ERROR_SYNTAX,
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'/permission denied/'
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=> MDB2_ERROR_ACCESS_VIOLATION,
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'/violates not-null constraint/'
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=> MDB2_ERROR_CONSTRAINT_NOT_NULL,
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'/violates [\w ]+ constraint/'
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=> MDB2_ERROR_CONSTRAINT,
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'/referential integrity violation/'
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=> MDB2_ERROR_CONSTRAINT,
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'/more expressions than target columns/i'
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=> MDB2_ERROR_VALUE_COUNT_ON_ROW,
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);
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}
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foreach ($error_regexps as $regexp => $code) {
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if (preg_match($regexp, $native_msg)) {
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$error_code = $code;
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break;
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}
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}
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return array($error_code, null, $native_msg);
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}
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// }}}
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// {{{ beginTransaction()
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/**
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* Start a transaction.
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*
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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*/
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function beginTransaction()
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{
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$this->debug('starting transaction', 'beginTransaction');
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if ($this->in_transaction) {
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return MDB2_OK; //nothing to do
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}
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if (!$this->destructor_registered && $this->opened_persistent) {
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$this->destructor_registered = true;
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register_shutdown_function('MDB2_closeOpenTransactions');
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}
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$result = $this->_doQuery('BEGIN', true);
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if (PEAR::isError($result)) {
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return $result;
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}
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$this->in_transaction = true;
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return MDB2_OK;
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}
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// }}}
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// {{{ commit()
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/**
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* Commit the database changes done during a transaction that is in
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* progress.
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*
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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*/
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function commit()
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{
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$this->debug('commit transaction', 'commit');
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if (!$this->in_transaction) {
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return $this->raiseError(MDB2_ERROR, null, null,
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'commit: transaction changes are being auto committed');
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}
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$result = $this->_doQuery('COMMIT', true);
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if (PEAR::isError($result)) {
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return $result;
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}
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$this->in_transaction = false;
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return MDB2_OK;
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}
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// }}}
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// {{{ rollback()
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/**
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* Cancel any database changes done during a transaction that is in
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* progress.
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*
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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*/
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function rollback()
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{
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$this->debug('rolling back transaction', 'rollback');
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if (!$this->in_transaction) {
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return $this->raiseError(MDB2_ERROR, null, null,
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'rollback: transactions can not be rolled back when changes are auto committed');
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}
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$result = $this->_doQuery('ROLLBACK', true);
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if (PEAR::isError($result)) {
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return $result;
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}
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$this->in_transaction = false;
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return MDB2_OK;
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}
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// }}}
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// {{{ _doConnect()
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/**
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* Does the grunt work of connecting to the database
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*
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* @return mixed connection resource on success, MDB2 Error Object on failure
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* @access protected
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**/
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function _doConnect($database_name, $persistent = false)
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{
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if ($database_name == '') {
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$database_name = 'template1';
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}
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$protocol = $this->dsn['protocol'] ? $this->dsn['protocol'] : 'tcp';
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$params = array('');
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if ($protocol == 'tcp') {
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if ($this->dsn['hostspec']) {
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$params[0].= 'host=' . $this->dsn['hostspec'];
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}
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if ($this->dsn['port']) {
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$params[0].= ' port=' . $this->dsn['port'];
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}
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} elseif ($protocol == 'unix') {
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// Allow for pg socket in non-standard locations.
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if ($this->dsn['socket']) {
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$params[0].= 'host=' . $this->dsn['socket'];
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}
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if ($this->dsn['port']) {
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$params[0].= ' port=' . $this->dsn['port'];
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}
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}
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if ($database_name) {
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$params[0].= ' dbname=\'' . addslashes($database_name) . '\'';
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}
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if ($this->dsn['username']) {
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$params[0].= ' user=\'' . addslashes($this->dsn['username']) . '\'';
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}
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if ($this->dsn['password']) {
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$params[0].= ' password=\'' . addslashes($this->dsn['password']) . '\'';
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}
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if (!empty($this->dsn['options'])) {
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$params[0].= ' options=' . $this->dsn['options'];
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}
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if (!empty($this->dsn['tty'])) {
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$params[0].= ' tty=' . $this->dsn['tty'];
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}
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if (!empty($this->dsn['connect_timeout'])) {
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$params[0].= ' connect_timeout=' . $this->dsn['connect_timeout'];
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}
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if (!empty($this->dsn['sslmode'])) {
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$params[0].= ' sslmode=' . $this->dsn['sslmode'];
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}
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if (!empty($this->dsn['service'])) {
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$params[0].= ' service=' . $this->dsn['service'];
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}
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if (isset($this->dsn['new_link'])
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&& ($this->dsn['new_link'] == 'true' || $this->dsn['new_link'] === true))
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{
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if (version_compare(phpversion(), '4.3.0', '>=')) {
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$params[] = PGSQL_CONNECT_FORCE_NEW;
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}
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}
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$connect_function = $persistent ? 'pg_pconnect' : 'pg_connect';
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putenv('PGDATESTYLE=ISO');
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@ini_set('track_errors', true);
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$php_errormsg = '';
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$connection = @call_user_func_array($connect_function, $params);
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@ini_restore('track_errors');
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if (!$connection) {
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return $this->raiseError(MDB2_ERROR_CONNECT_FAILED,
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null, null, strip_tags($php_errormsg));
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}
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return $connection;
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}
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// }}}
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// {{{ connect()
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/**
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* Connect to the database
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*
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* @return true on success, MDB2 Error Object on failure
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* @access public
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**/
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function connect()
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{
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if (is_resource($this->connection)) {
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if (count(array_diff($this->connected_dsn, $this->dsn)) == 0
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&& $this->connected_database_name == $this->database_name
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&& ($this->opened_persistent == $this->options['persistent'])
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) {
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return MDB2_OK;
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}
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$this->disconnect(false);
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}
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if (!PEAR::loadExtension($this->phptype)) {
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return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
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'connect: extension '.$this->phptype.' is not compiled into PHP');
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}
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if ($this->database_name) {
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$connection = $this->_doConnect($this->database_name, $this->options['persistent']);
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if (PEAR::isError($connection)) {
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return $connection;
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}
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$this->connection = $connection;
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$this->connected_dsn = $this->dsn;
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$this->connected_database_name = $this->database_name;
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$this->opened_persistent = $this->options['persistent'];
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$this->dbsyntax = $this->dsn['dbsyntax'] ? $this->dsn['dbsyntax'] : $this->phptype;
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}
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return MDB2_OK;
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}
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// }}}
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// {{{ disconnect()
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/**
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* Log out and disconnect from the database.
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*
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* @return mixed true on success, false if not connected and error
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* object on error
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* @access public
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*/
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function disconnect($force = true)
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{
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if (is_resource($this->connection)) {
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if (!$this->opened_persistent || $force) {
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@pg_close($this->connection);
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}
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$this->connection = 0;
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}
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return MDB2_OK;
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}
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// }}}
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// {{{ standaloneQuery()
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/**
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* execute a query as DBA
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*
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* @param string $query the SQL query
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* @param mixed $types array that contains the types of the columns in
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* the result set
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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*/
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function &standaloneQuery($query, $types = null)
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{
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$connection = $this->_doConnect('template1', false);
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if (PEAR::isError($connection)) {
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$err =& $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,
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'Cannot connect to template1');
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return $err;
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}
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$isManip = MDB2::isManip($query);
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$offset = $this->row_offset;
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$limit = $this->row_limit;
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$this->row_offset = $this->row_limit = 0;
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$query = $this->_modifyQuery($query, $isManip, $limit, $offset);
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$result = $this->_doQuery($query, $isManip, $connection, false);
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@pg_close($connection);
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if (PEAR::isError($result)) {
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return $result;
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}
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if ($isManip) {
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return $result;
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}
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$result =& $this->_wrapResult($result, $types, true, false, $limit, $offset);
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return $result;
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}
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// }}}
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// {{{ _doQuery()
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/**
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* Execute a query
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* @param string $query query
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* @param boolean $isManip if the query is a manipulation query
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* @param resource $connection
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* @param string $database_name
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* @return result or error object
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* @access protected
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*/
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function _doQuery($query, $isManip = false, $connection = null, $database_name = null)
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{
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$this->last_query = $query;
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$this->debug($query, 'query');
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if ($this->options['disable_query']) {
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if ($isManip) {
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return 0;
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}
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return null;
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}
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if (is_null($connection)) {
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$err = $this->connect();
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if (PEAR::isError($err)) {
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return $err;
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}
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$connection = $this->connection;
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}
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$result = @pg_query($connection, $query);
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if (!$result) {
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return $this->raiseError();
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}
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if ($isManip) {
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return @pg_affected_rows($result);
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} elseif (!preg_match('/^\s*\(*\s*(SELECT|EXPLAIN|FETCH|SHOW)\s/si', $query)) {
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return 0;
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}
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return $result;
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}
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// }}}
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// {{{ _modifyQuery()
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/**
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* Changes a query string for various DBMS specific reasons
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*
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* @param string $query query to modify
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* @return the new (modified) query
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* @access protected
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*/
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function _modifyQuery($query, $isManip, $limit, $offset)
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{
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if ($limit > 0
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&& !preg_match('/LIMIT\s*\d(\s*(,|OFFSET)\s*\d+)?/i', $query)
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) {
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$query = rtrim($query);
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if (substr($query, -1) == ';') {
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$query = substr($query, 0, -1);
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}
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if ($isManip) {
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$manip = preg_replace('/^(DELETE FROM|UPDATE).*$/', '\\1', $query);
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$from = $match[2];
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$where = $match[3];
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$query = $manip.' '.$from.' WHERE ctid=(SELECT ctid FROM '.$from.' '.$where.' LIMIT '.$limit.')';
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} else {
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$query.= " LIMIT $limit OFFSET $offset";
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}
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}
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return $query;
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}
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// }}}
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// {{{ nextID()
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/**
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* returns the next free id of a sequence
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*
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* @param string $seq_name name of the sequence
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* @param boolean $ondemand when true the seqence is
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* automatic created, if it
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* not exists
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* @return mixed MDB2 Error Object or id
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* @access public
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*/
|
|
function nextID($seq_name, $ondemand = true)
|
|
{
|
|
$sequence_name = $this->getSequenceName($seq_name);
|
|
$query = "SELECT NEXTVAL('$sequence_name')";
|
|
$this->expectError(MDB2_ERROR_NOSUCHTABLE);
|
|
$result = $this->queryOne($query, 'integer');
|
|
$this->popExpect();
|
|
if (PEAR::isError($result)) {
|
|
if ($ondemand && $result->getCode() == MDB2_ERROR_NOSUCHTABLE) {
|
|
$this->loadModule('Manager');
|
|
$result = $this->manager->createSequence($seq_name, 1);
|
|
if (PEAR::isError($result)) {
|
|
return $this->raiseError(MDB2_ERROR, null, null,
|
|
'nextID: on demand sequence could not be created');
|
|
}
|
|
return $this->nextId($seq_name, false);
|
|
}
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ currID()
|
|
|
|
/**
|
|
* returns the current id of a sequence
|
|
*
|
|
* @param string $seq_name name of the sequence
|
|
* @return mixed MDB2 Error Object or id
|
|
* @access public
|
|
*/
|
|
function currID($seq_name)
|
|
{
|
|
$sequence_name = $this->getSequenceName($seq_name);
|
|
return $this->queryOne("SELECT last_value FROM $sequence_name", 'integer');
|
|
}
|
|
}
|
|
|
|
class MDB2_Result_pgsql extends MDB2_Result_Common
|
|
{
|
|
// }}}
|
|
// {{{ fetchRow()
|
|
|
|
/**
|
|
* Fetch a row and insert the data into an existing array.
|
|
*
|
|
* @param int $fetchmode how the array data should be indexed
|
|
* @param int $rownum number of the row where the data can be found
|
|
* @return int data array on success, a MDB2 error on failure
|
|
* @access public
|
|
*/
|
|
function &fetchRow($fetchmode = MDB2_FETCHMODE_DEFAULT, $rownum = null)
|
|
{
|
|
if (!is_null($rownum)) {
|
|
$seek = $this->seek($rownum);
|
|
if (PEAR::isError($seek)) {
|
|
return $seek;
|
|
}
|
|
}
|
|
if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {
|
|
$fetchmode = $this->db->fetchmode;
|
|
}
|
|
if ($fetchmode & MDB2_FETCHMODE_ASSOC) {
|
|
$row = @pg_fetch_array($this->result, null, PGSQL_ASSOC);
|
|
if (is_array($row)
|
|
&& $this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
|
|
) {
|
|
$row = array_change_key_case($row, $this->db->options['field_case']);
|
|
}
|
|
} else {
|
|
$row = @pg_fetch_row($this->result);
|
|
}
|
|
if (!$row) {
|
|
if (is_null($this->result)) {
|
|
$err =& $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
|
'fetchRow: resultset has already been freed');
|
|
return $err;
|
|
}
|
|
$null = null;
|
|
return $null;
|
|
}
|
|
if ($this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL) {
|
|
$this->db->_fixResultArrayValues($row, MDB2_PORTABILITY_EMPTY_TO_NULL);
|
|
}
|
|
if (!empty($this->values)) {
|
|
$this->_assignBindColumns($row);
|
|
}
|
|
if (!empty($this->types)) {
|
|
$row = $this->db->datatype->convertResultRow($this->types, $row);
|
|
}
|
|
if ($fetchmode === MDB2_FETCHMODE_OBJECT) {
|
|
$object_class = $this->db->options['fetch_class'];
|
|
if ($object_class == 'stdClass') {
|
|
$row = (object) $row;
|
|
} else {
|
|
$row = &new $object_class($row);
|
|
}
|
|
}
|
|
++$this->rownum;
|
|
return $row;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _getColumnNames()
|
|
|
|
/**
|
|
* Retrieve the names of columns returned by the DBMS in a query result.
|
|
*
|
|
* @return mixed an associative array variable
|
|
* that will hold the names of columns. The
|
|
* indexes of the array are the column names
|
|
* mapped to lower case and the values are the
|
|
* respective numbers of the columns starting
|
|
* from 0. Some DBMS may not return any
|
|
* columns when the result set does not
|
|
* contain any rows.
|
|
*
|
|
* a MDB2 error on failure
|
|
* @access private
|
|
*/
|
|
function _getColumnNames()
|
|
{
|
|
$columns = array();
|
|
$numcols = $this->numCols();
|
|
if (PEAR::isError($numcols)) {
|
|
return $numcols;
|
|
}
|
|
for ($column = 0; $column < $numcols; $column++) {
|
|
$column_name = @pg_field_name($this->result, $column);
|
|
$columns[$column_name] = $column;
|
|
}
|
|
if ($this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
|
|
$columns = array_change_key_case($columns, $this->db->options['field_case']);
|
|
}
|
|
return $columns;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ numCols()
|
|
|
|
/**
|
|
* Count the number of columns returned by the DBMS in a query result.
|
|
*
|
|
* @access public
|
|
* @return mixed integer value with the number of columns, a MDB2 error
|
|
* on failure
|
|
*/
|
|
function numCols()
|
|
{
|
|
$cols = @pg_num_fields($this->result);
|
|
if (is_null($cols)) {
|
|
if (is_null($this->result)) {
|
|
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
|
'numCols: resultset has already been freed');
|
|
}
|
|
return $this->db->raiseError();
|
|
}
|
|
return $cols;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ free()
|
|
|
|
/**
|
|
* Free the internal resources associated with result.
|
|
*
|
|
* @return boolean true on success, false if result is invalid
|
|
* @access public
|
|
*/
|
|
function free()
|
|
{
|
|
$free = @pg_free_result($this->result);
|
|
if (!$free) {
|
|
if (is_null($this->result)) {
|
|
return MDB2_OK;
|
|
}
|
|
return $this->db->raiseError();
|
|
}
|
|
$this->result = null;
|
|
return MDB2_OK;
|
|
}
|
|
}
|
|
|
|
class MDB2_BufferedResult_pgsql extends MDB2_Result_pgsql
|
|
{
|
|
// {{{ seek()
|
|
|
|
/**
|
|
* seek to a specific row in a result set
|
|
*
|
|
* @param int $rownum number of the row where the data can be found
|
|
* @return mixed MDB2_OK on success, a MDB2 error on failure
|
|
* @access public
|
|
*/
|
|
function seek($rownum = 0)
|
|
{
|
|
if ($this->rownum != ($rownum - 1) && !@pg_result_seek($this->result, $rownum)) {
|
|
if (is_null($this->result)) {
|
|
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
|
'seek: resultset has already been freed');
|
|
}
|
|
return $this->db->raiseError(MDB2_ERROR_INVALID, null, null,
|
|
'seek: tried to seek to an invalid row number ('.$rownum.')');
|
|
}
|
|
$this->rownum = $rownum - 1;
|
|
return MDB2_OK;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ valid()
|
|
|
|
/**
|
|
* check if the end of the result set has been reached
|
|
*
|
|
* @return mixed true or false on sucess, a MDB2 error on failure
|
|
* @access public
|
|
*/
|
|
function valid()
|
|
{
|
|
$numrows = $this->numRows();
|
|
if (PEAR::isError($numrows)) {
|
|
return $numrows;
|
|
}
|
|
return $this->rownum < ($numrows - 1);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ numRows()
|
|
|
|
/**
|
|
* returns the number of rows in a result object
|
|
*
|
|
* @return mixed MDB2 Error Object or the number of rows
|
|
* @access public
|
|
*/
|
|
function numRows()
|
|
{
|
|
$rows = @pg_num_rows($this->result);
|
|
if (is_null($rows)) {
|
|
if (is_null($this->result)) {
|
|
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
|
'numRows: resultset has already been freed');
|
|
}
|
|
return $this->raiseError();
|
|
}
|
|
return $rows;
|
|
}
|
|
}
|
|
|
|
class MDB2_Statement_pgsql extends MDB2_Statement_Common
|
|
{
|
|
|
|
}
|
|
?>
|