1585 lines
57 KiB
PHP
1585 lines
57 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) 1998-2008 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 $string_quoting = array('start' => "'", 'end' => "'", 'escape' => "'", 'escape_pattern' => '\\');
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var $identifier_quoting = array('start' => '"', 'end' => '"', 'escape' => '"');
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// }}}
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// {{{ constructor
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/**
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* Constructor
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*/
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function __construct()
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{
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parent::__construct();
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$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['savepoints'] = 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['triggers'] = true;
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$this->supported['auto_increment'] = 'emulated';
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$this->supported['primary_key'] = true;
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$this->supported['result_introspection'] = true;
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$this->supported['prepared_statements'] = true;
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$this->supported['identifier_quoting'] = true;
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$this->supported['pattern_escaping'] = true;
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$this->supported['new_link'] = true;
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$this->options['DBA_username'] = false;
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$this->options['DBA_password'] = false;
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$this->options['multi_query'] = false;
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$this->options['disable_smart_seqname'] = true;
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$this->options['max_identifiers_length'] = 63;
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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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} else {
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$native_msg = @pg_last_error();
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}
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static $error_regexps;
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if (empty($error_regexps)) {
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$error_regexps = array(
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'/column .* (of relation .*)?does not exist/i'
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=> MDB2_ERROR_NOSUCHFIELD,
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'/(relation|sequence|table).*does not exist|class .* not found/i'
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=> MDB2_ERROR_NOSUCHTABLE,
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'/database .* does not exist/'
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=> MDB2_ERROR_NOT_FOUND,
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'/constraint .* does not exist/'
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=> MDB2_ERROR_NOT_FOUND,
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'/index .* does not exist/'
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=> MDB2_ERROR_NOT_FOUND,
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'/database .* already exists/i'
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=> MDB2_ERROR_ALREADY_EXISTS,
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'/relation .* already exists/i'
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=> MDB2_ERROR_ALREADY_EXISTS,
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'/(divide|division) by zero$/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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if (is_numeric($error) && $error < 0) {
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$error_code = $error;
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} else {
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foreach ($error_regexps as $regexp => $code) {
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if (preg_match($regexp, $native_msg)) {
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$error_code = $code;
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break;
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}
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}
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}
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return array($error_code, null, $native_msg);
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}
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// }}}
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// {{{ escape()
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/**
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* Quotes a string so it can be safely used in a query. It will quote
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* the text so it can safely be used within a query.
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*
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* @param string the input string to quote
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* @param bool escape wildcards
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*
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* @return string quoted string
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*
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* @access public
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*/
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function escape($text, $escape_wildcards = false)
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{
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if ($escape_wildcards) {
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$text = $this->escapePattern($text);
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}
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$connection = $this->getConnection();
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if (MDB2::isError($connection)) {
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return $connection;
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}
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if (is_resource($connection) && version_compare(PHP_VERSION, '5.2.0RC5', '>=')) {
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$text = @pg_escape_string($connection, $text);
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} else {
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$text = @pg_escape_string($text);
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}
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return $text;
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}
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// }}}
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// {{{ beginTransaction()
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/**
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* Start a transaction or set a savepoint.
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*
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* @param string name of a savepoint to set
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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*
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* @access public
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*/
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function beginTransaction($savepoint = null)
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{
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$this->debug('Starting transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
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if (null !== $savepoint) {
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if (!$this->in_transaction) {
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return $this->raiseError(MDB2_ERROR_INVALID, null, null,
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'savepoint cannot be released when changes are auto committed', __FUNCTION__);
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}
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$query = 'SAVEPOINT '.$savepoint;
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return $this->_doQuery($query, true);
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}
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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 = $this->_doQuery('BEGIN', true);
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if (MDB2::isError($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 or release a savepoint. This function may only be called when
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* auto-committing is disabled, otherwise it will fail. Therefore, a new
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* transaction is implicitly started after committing the pending changes.
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*
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* @param string name of a savepoint to release
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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*
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* @access public
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*/
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function commit($savepoint = null)
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{
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$this->debug('Committing transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
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if (!$this->in_transaction) {
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return $this->raiseError(MDB2_ERROR_INVALID, null, null,
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'commit/release savepoint cannot be done changes are auto committed', __FUNCTION__);
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}
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if (null !== $savepoint) {
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$query = 'RELEASE SAVEPOINT '.$savepoint;
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return $this->_doQuery($query, true);
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}
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$result = $this->_doQuery('COMMIT', true);
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if (MDB2::isError($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 or since a specific
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* savepoint that is in progress. This function may only be called when
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* auto-committing is disabled, otherwise it will fail. Therefore, a new
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* transaction is implicitly started after canceling the pending changes.
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*
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* @param string name of a savepoint to rollback to
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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*
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* @access public
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*/
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function rollback($savepoint = null)
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{
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$this->debug('Rolling back transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
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if (!$this->in_transaction) {
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return $this->raiseError(MDB2_ERROR_INVALID, null, null,
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'rollback cannot be done changes are auto committed', __FUNCTION__);
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}
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if (null !== $savepoint) {
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$query = 'ROLLBACK TO SAVEPOINT '.$savepoint;
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return $this->_doQuery($query, true);
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}
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$query = 'ROLLBACK';
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$result = $this->_doQuery($query, true);
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if (MDB2::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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// {{{ function setTransactionIsolation()
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/**
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* Set the transacton isolation level.
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*
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* @param string standard isolation level
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* READ UNCOMMITTED (allows dirty reads)
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* READ COMMITTED (prevents dirty reads)
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* REPEATABLE READ (prevents nonrepeatable reads)
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* SERIALIZABLE (prevents phantom reads)
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* @param array some transaction options:
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* 'wait' => 'WAIT' | 'NO WAIT'
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* 'rw' => 'READ WRITE' | 'READ ONLY'
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*
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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*
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* @access public
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* @since 2.1.1
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*/
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function setTransactionIsolation($isolation, $options = array())
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{
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$this->debug('Setting transaction isolation level', __FUNCTION__, array('is_manip' => true));
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switch ($isolation) {
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case 'READ UNCOMMITTED':
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case 'READ COMMITTED':
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case 'REPEATABLE READ':
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case 'SERIALIZABLE':
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break;
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default:
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return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
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'isolation level is not supported: '.$isolation, __FUNCTION__);
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}
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$query = "SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL $isolation";
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return $this->_doQuery($query, true);
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}
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// }}}
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// {{{ _doConnect()
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/**
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* Do 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($username, $password, $database_name, $persistent = false)
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{
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if (!extension_loaded($this->phptype)) {
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return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
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'extension '.$this->phptype.' is not compiled into PHP', __FUNCTION__);
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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 ($username) {
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$params[0].= ' user=\'' . addslashes($username) . '\'';
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}
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if ($password) {
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$params[0].= ' password=\'' . addslashes($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=' . $this->dsn['service'];
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}
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if ($this->_isNewLinkSet()) {
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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 = $persistent ? 'pg_pconnect' : 'pg_connect';
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$connection = @call_user_func_array($connect_function, $params);
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if (!$connection) {
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return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,
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'unable to establish a connection', __FUNCTION__);
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}
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if (empty($this->dsn['disable_iso_date'])) {
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if (!@pg_query($connection, "SET SESSION DATESTYLE = 'ISO'")) {
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return $this->raiseError(null, null, null,
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'Unable to set date style to iso', __FUNCTION__);
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}
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}
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if (!empty($this->dsn['charset'])) {
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$result = $this->setCharset($this->dsn['charset'], $connection);
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if (MDB2::isError($result)) {
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return $result;
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}
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}
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// Enable extra compatibility settings on 8.2 and later
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if (function_exists('pg_parameter_status')) {
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$version = pg_parameter_status($connection, 'server_version');
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if ($version == false) {
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return $this->raiseError(null, null, null,
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'Unable to retrieve server version', __FUNCTION__);
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}
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$version = explode ('.', $version);
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if ( $version['0'] > 8
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|| ($version['0'] == 8 && $version['1'] >= 2)
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) {
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if (!@pg_query($connection, "SET SESSION STANDARD_CONFORMING_STRINGS = OFF")) {
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return $this->raiseError(null, null, null,
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'Unable to set standard_conforming_strings to off', __FUNCTION__);
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}
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if (!@pg_query($connection, "SET SESSION ESCAPE_STRING_WARNING = OFF")) {
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return $this->raiseError(null, null, null,
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'Unable to set escape_string_warning to off', __FUNCTION__);
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}
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}
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}
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return $connection;
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}
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// }}}
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// {{{ connect()
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/**
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* Connect to the database
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*
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* @return true on success, MDB2 Error Object on failure
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* @access public
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*/
|
|
function connect()
|
|
{
|
|
if (is_resource($this->connection)) {
|
|
//if (count(array_diff($this->connected_dsn, $this->dsn)) == 0
|
|
if (MDB2::areEquals($this->connected_dsn, $this->dsn)
|
|
&& $this->connected_database_name == $this->database_name
|
|
&& ($this->opened_persistent == $this->options['persistent'])
|
|
) {
|
|
return MDB2_OK;
|
|
}
|
|
$this->disconnect(false);
|
|
}
|
|
|
|
if ($this->database_name) {
|
|
$connection = $this->_doConnect($this->dsn['username'],
|
|
$this->dsn['password'],
|
|
$this->database_name,
|
|
$this->options['persistent']);
|
|
if (MDB2::isError($connection)) {
|
|
return $connection;
|
|
}
|
|
|
|
$this->connection = $connection;
|
|
$this->connected_dsn = $this->dsn;
|
|
$this->connected_database_name = $this->database_name;
|
|
$this->opened_persistent = $this->options['persistent'];
|
|
$this->dbsyntax = $this->dsn['dbsyntax'] ? $this->dsn['dbsyntax'] : $this->phptype;
|
|
}
|
|
|
|
return MDB2_OK;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ setCharset()
|
|
|
|
/**
|
|
* Set the charset on the current connection
|
|
*
|
|
* @param string charset
|
|
* @param resource connection handle
|
|
*
|
|
* @return true on success, MDB2 Error Object on failure
|
|
*/
|
|
function setCharset($charset, $connection = null)
|
|
{
|
|
if (null === $connection) {
|
|
$connection = $this->getConnection();
|
|
if (MDB2::isError($connection)) {
|
|
return $connection;
|
|
}
|
|
}
|
|
if (is_array($charset)) {
|
|
$charset = array_shift($charset);
|
|
$this->warnings[] = 'postgresql does not support setting client collation';
|
|
}
|
|
$result = @pg_set_client_encoding($connection, $charset);
|
|
if ($result == -1) {
|
|
return $this->raiseError(null, null, null,
|
|
'Unable to set client charset: '.$charset, __FUNCTION__);
|
|
}
|
|
return MDB2_OK;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ databaseExists()
|
|
|
|
/**
|
|
* check if given database name is exists?
|
|
*
|
|
* @param string $name name of the database that should be checked
|
|
*
|
|
* @return mixed true/false on success, a MDB2 error on failure
|
|
* @access public
|
|
*/
|
|
function databaseExists($name)
|
|
{
|
|
$res = $this->_doConnect($this->dsn['username'],
|
|
$this->dsn['password'],
|
|
$this->escape($name),
|
|
$this->options['persistent']);
|
|
if (!MDB2::isError($res)) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ disconnect()
|
|
|
|
/**
|
|
* Log out and disconnect from the database.
|
|
*
|
|
* @param boolean $force if the disconnect should be forced even if the
|
|
* connection is opened persistently
|
|
* @return mixed true on success, false if not connected and error
|
|
* object on error
|
|
* @access public
|
|
*/
|
|
function disconnect($force = true)
|
|
{
|
|
if (is_resource($this->connection)) {
|
|
if ($this->in_transaction) {
|
|
$dsn = $this->dsn;
|
|
$database_name = $this->database_name;
|
|
$persistent = $this->options['persistent'];
|
|
$this->dsn = $this->connected_dsn;
|
|
$this->database_name = $this->connected_database_name;
|
|
$this->options['persistent'] = $this->opened_persistent;
|
|
$this->rollback();
|
|
$this->dsn = $dsn;
|
|
$this->database_name = $database_name;
|
|
$this->options['persistent'] = $persistent;
|
|
}
|
|
|
|
if (!$this->opened_persistent || $force) {
|
|
$ok = @pg_close($this->connection);
|
|
if (!$ok) {
|
|
return $this->raiseError(MDB2_ERROR_DISCONNECT_FAILED,
|
|
null, null, null, __FUNCTION__);
|
|
}
|
|
}
|
|
} else {
|
|
return false;
|
|
}
|
|
return parent::disconnect($force);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ standaloneQuery()
|
|
|
|
/**
|
|
* execute a query as DBA
|
|
*
|
|
* @param string $query the SQL query
|
|
* @param mixed $types array that contains the types of the columns in
|
|
* the result set
|
|
* @param boolean $is_manip if the query is a manipulation query
|
|
* @return mixed MDB2_OK on success, a MDB2 error on failure
|
|
* @access public
|
|
*/
|
|
function standaloneQuery($query, $types = null, $is_manip = false)
|
|
{
|
|
$user = $this->options['DBA_username']? $this->options['DBA_username'] : $this->dsn['username'];
|
|
$pass = $this->options['DBA_password']? $this->options['DBA_password'] : $this->dsn['password'];
|
|
$connection = $this->_doConnect($user, $pass, $this->database_name, $this->options['persistent']);
|
|
if (MDB2::isError($connection)) {
|
|
return $connection;
|
|
}
|
|
|
|
$offset = $this->offset;
|
|
$limit = $this->limit;
|
|
$this->offset = $this->limit = 0;
|
|
$query = $this->_modifyQuery($query, $is_manip, $limit, $offset);
|
|
|
|
$result = $this->_doQuery($query, $is_manip, $connection, $this->database_name);
|
|
if (!MDB2::isError($result)) {
|
|
if ($is_manip) {
|
|
$result = $this->_affectedRows($connection, $result);
|
|
} else {
|
|
$result = $this->_wrapResult($result, $types, true, true, $limit, $offset);
|
|
}
|
|
}
|
|
|
|
@pg_close($connection);
|
|
return $result;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _doQuery()
|
|
|
|
/**
|
|
* Execute a query
|
|
* @param string $query query
|
|
* @param boolean $is_manip if the query is a manipulation query
|
|
* @param resource $connection
|
|
* @param string $database_name
|
|
* @return result or error object
|
|
* @access protected
|
|
*/
|
|
function _doQuery($query, $is_manip = false, $connection = null, $database_name = null)
|
|
{
|
|
$this->last_query = $query;
|
|
$result = $this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'pre'));
|
|
if ($result) {
|
|
if (MDB2::isError($result)) {
|
|
return $result;
|
|
}
|
|
$query = $result;
|
|
}
|
|
if ($this->options['disable_query']) {
|
|
$result = $is_manip ? 0 : null;
|
|
return $result;
|
|
}
|
|
|
|
if (null === $connection) {
|
|
$connection = $this->getConnection();
|
|
if (MDB2::isError($connection)) {
|
|
return $connection;
|
|
}
|
|
}
|
|
|
|
$function = $this->options['multi_query'] ? 'pg_send_query' : 'pg_query';
|
|
$result = @$function($connection, $query);
|
|
if (!$result) {
|
|
$err = $this->raiseError(null, null, null,
|
|
'Could not execute statement', __FUNCTION__);
|
|
return $err;
|
|
} elseif ($this->options['multi_query']) {
|
|
if (!($result = @pg_get_result($connection))) {
|
|
$err = $this->raiseError(null, null, null,
|
|
'Could not get the first result from a multi query', __FUNCTION__);
|
|
return $err;
|
|
}
|
|
}
|
|
|
|
$this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'post', 'result' => $result));
|
|
return $result;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _affectedRows()
|
|
|
|
/**
|
|
* Returns the number of rows affected
|
|
*
|
|
* @param resource $result
|
|
* @param resource $connection
|
|
* @return mixed MDB2 Error Object or the number of rows affected
|
|
* @access private
|
|
*/
|
|
function _affectedRows($connection, $result = null)
|
|
{
|
|
if (null === $connection) {
|
|
$connection = $this->getConnection();
|
|
if (MDB2::isError($connection)) {
|
|
return $connection;
|
|
}
|
|
}
|
|
return @pg_affected_rows($result);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _modifyQuery()
|
|
|
|
/**
|
|
* Changes a query string for various DBMS specific reasons
|
|
*
|
|
* @param string $query query to modify
|
|
* @param boolean $is_manip if it is a DML query
|
|
* @param integer $limit limit the number of rows
|
|
* @param integer $offset start reading from given offset
|
|
* @return string modified query
|
|
* @access protected
|
|
*/
|
|
function _modifyQuery($query, $is_manip, $limit, $offset)
|
|
{
|
|
if ($limit > 0
|
|
&& !preg_match('/LIMIT\s*\d(?:\s*(?:,|OFFSET)\s*\d+)?(?:[^\)]*)?$/i', $query)
|
|
) {
|
|
$query = rtrim($query);
|
|
if (substr($query, -1) == ';') {
|
|
$query = substr($query, 0, -1);
|
|
}
|
|
if ($is_manip) {
|
|
$query = $this->_modifyManipQuery($query, $limit);
|
|
} else {
|
|
$query.= " LIMIT $limit OFFSET $offset";
|
|
}
|
|
}
|
|
return $query;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _modifyManipQuery()
|
|
|
|
/**
|
|
* Changes a manip query string for various DBMS specific reasons
|
|
*
|
|
* @param string $query query to modify
|
|
* @param integer $limit limit the number of rows
|
|
* @return string modified query
|
|
* @access protected
|
|
*/
|
|
function _modifyManipQuery($query, $limit)
|
|
{
|
|
$pos = strpos(strtolower($query), 'where');
|
|
$where = $pos ? substr($query, $pos) : '';
|
|
|
|
$manip_clause = '(\bDELETE\b\s+(?:\*\s+)?\bFROM\b|\bUPDATE\b)';
|
|
$from_clause = '([\w\.]+)';
|
|
$where_clause = '(?:(.*)\bWHERE\b\s+(.*))|(.*)';
|
|
$pattern = '/^'. $manip_clause . '\s+' . $from_clause .'(?:\s)*(?:'. $where_clause .')?$/i';
|
|
$matches = preg_match($pattern, $query, $match);
|
|
if ($matches) {
|
|
$manip = $match[1];
|
|
$from = $match[2];
|
|
$what = (count($matches) == 6) ? $match[5] : $match[3];
|
|
return $manip.' '.$from.' '.$what.' WHERE ctid=(SELECT ctid FROM '.$from.' '.$where.' LIMIT '.$limit.')';
|
|
}
|
|
//return error?
|
|
return $query;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getServerVersion()
|
|
|
|
/**
|
|
* return version information about the server
|
|
*
|
|
* @param bool $native determines if the raw version string should be returned
|
|
* @return mixed array/string with version information or MDB2 error object
|
|
* @access public
|
|
*/
|
|
function getServerVersion($native = false)
|
|
{
|
|
$query = 'SHOW SERVER_VERSION';
|
|
if ($this->connected_server_info) {
|
|
$server_info = $this->connected_server_info;
|
|
} else {
|
|
$server_info = $this->queryOne($query, 'text');
|
|
if (MDB2::isError($server_info)) {
|
|
return $server_info;
|
|
}
|
|
}
|
|
// cache server_info
|
|
$this->connected_server_info = $server_info;
|
|
if (!$native && !MDB2::isError($server_info)) {
|
|
$tmp = explode('.', $server_info, 3);
|
|
if (empty($tmp[2])
|
|
&& isset($tmp[1])
|
|
&& preg_match('/(\d+)(.*)/', $tmp[1], $tmp2)
|
|
) {
|
|
$server_info = array(
|
|
'major' => $tmp[0],
|
|
'minor' => $tmp2[1],
|
|
'patch' => null,
|
|
'extra' => $tmp2[2],
|
|
'native' => $server_info,
|
|
);
|
|
} else {
|
|
$server_info = array(
|
|
'major' => isset($tmp[0]) ? $tmp[0] : null,
|
|
'minor' => isset($tmp[1]) ? $tmp[1] : null,
|
|
'patch' => isset($tmp[2]) ? $tmp[2] : null,
|
|
'extra' => null,
|
|
'native' => $server_info,
|
|
);
|
|
}
|
|
}
|
|
return $server_info;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ prepare()
|
|
|
|
/**
|
|
* Prepares a query for multiple execution with execute().
|
|
* With some database backends, this is emulated.
|
|
* prepare() requires a generic query as string like
|
|
* 'INSERT INTO numbers VALUES(?,?)' or
|
|
* 'INSERT INTO numbers VALUES(:foo,:bar)'.
|
|
* The ? and :name and are placeholders which can be set using
|
|
* bindParam() and the query can be sent off using the execute() method.
|
|
* The allowed format for :name can be set with the 'bindname_format' option.
|
|
*
|
|
* @param string $query the query to prepare
|
|
* @param mixed $types array that contains the types of the placeholders
|
|
* @param mixed $result_types array that contains the types of the columns in
|
|
* the result set or MDB2_PREPARE_RESULT, if set to
|
|
* MDB2_PREPARE_MANIP the query is handled as a manipulation query
|
|
* @param mixed $lobs key (field) value (parameter) pair for all lob placeholders
|
|
* @return mixed resource handle for the prepared query on success, a MDB2
|
|
* error on failure
|
|
* @access public
|
|
* @see bindParam, execute
|
|
*/
|
|
function prepare($query, $types = null, $result_types = null, $lobs = array())
|
|
{
|
|
if ($this->options['emulate_prepared']) {
|
|
return parent::prepare($query, $types, $result_types, $lobs);
|
|
}
|
|
$is_manip = ($result_types === MDB2_PREPARE_MANIP);
|
|
$offset = $this->offset;
|
|
$limit = $this->limit;
|
|
$this->offset = $this->limit = 0;
|
|
$result = $this->debug($query, __FUNCTION__, array('is_manip' => $is_manip, 'when' => 'pre'));
|
|
if ($result) {
|
|
if (MDB2::isError($result)) {
|
|
return $result;
|
|
}
|
|
$query = $result;
|
|
}
|
|
$pgtypes = function_exists('pg_prepare') ? false : array();
|
|
if ($pgtypes !== false && !empty($types)) {
|
|
$this->loadModule('Datatype', null, true);
|
|
}
|
|
$query = $this->_modifyQuery($query, $is_manip, $limit, $offset);
|
|
$placeholder_type_guess = $placeholder_type = null;
|
|
$question = '?';
|
|
$colon = ':';
|
|
$positions = array();
|
|
$position = $parameter = 0;
|
|
while ($position < strlen($query)) {
|
|
$q_position = strpos($query, $question, $position);
|
|
$c_position = strpos($query, $colon, $position);
|
|
//skip "::type" cast ("select id::varchar(20) from sometable where name=?")
|
|
$doublecolon_position = strpos($query, '::', $position);
|
|
if ($doublecolon_position !== false && $doublecolon_position == $c_position) {
|
|
$c_position = strpos($query, $colon, $position+2);
|
|
}
|
|
if ($q_position && $c_position) {
|
|
$p_position = min($q_position, $c_position);
|
|
} elseif ($q_position) {
|
|
$p_position = $q_position;
|
|
} elseif ($c_position) {
|
|
$p_position = $c_position;
|
|
} else {
|
|
break;
|
|
}
|
|
if (null === $placeholder_type) {
|
|
$placeholder_type_guess = $query[$p_position];
|
|
}
|
|
|
|
$new_pos = $this->_skipDelimitedStrings($query, $position, $p_position);
|
|
if (MDB2::isError($new_pos)) {
|
|
return $new_pos;
|
|
}
|
|
if ($new_pos != $position) {
|
|
$position = $new_pos;
|
|
continue; //evaluate again starting from the new position
|
|
}
|
|
|
|
if ($query[$position] == $placeholder_type_guess) {
|
|
if (null === $placeholder_type) {
|
|
$placeholder_type = $query[$p_position];
|
|
$question = $colon = $placeholder_type;
|
|
if (!empty($types) && is_array($types)) {
|
|
if ($placeholder_type == ':') {
|
|
} else {
|
|
$types = array_values($types);
|
|
}
|
|
}
|
|
}
|
|
if ($placeholder_type_guess == '?') {
|
|
$length = 1;
|
|
$name = $parameter;
|
|
} else {
|
|
$regexp = '/^.{'.($position+1).'}('.$this->options['bindname_format'].').*$/s';
|
|
$param = preg_replace($regexp, '\\1', $query);
|
|
if ($param === '') {
|
|
$err = $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
|
|
'named parameter name must match "bindname_format" option', __FUNCTION__);
|
|
return $err;
|
|
}
|
|
$length = strlen($param) + 1;
|
|
$name = $param;
|
|
}
|
|
if ($pgtypes !== false) {
|
|
if (is_array($types) && array_key_exists($name, $types)) {
|
|
$pgtypes[] = $this->datatype->mapPrepareDatatype($types[$name]);
|
|
} elseif (is_array($types) && array_key_exists($parameter, $types)) {
|
|
$pgtypes[] = $this->datatype->mapPrepareDatatype($types[$parameter]);
|
|
} else {
|
|
$pgtypes[] = 'text';
|
|
}
|
|
}
|
|
if (($key_parameter = array_search($name, $positions)) !== false) {
|
|
//$next_parameter = 1;
|
|
$parameter = $key_parameter + 1;
|
|
//foreach ($positions as $key => $value) {
|
|
// if ($key_parameter == $key) {
|
|
// break;
|
|
// }
|
|
// ++$next_parameter;
|
|
//}
|
|
} else {
|
|
++$parameter;
|
|
//$next_parameter = $parameter;
|
|
$positions[] = $name;
|
|
}
|
|
$query = substr_replace($query, '$'.$parameter, $position, $length);
|
|
$position = $p_position + strlen($parameter);
|
|
} else {
|
|
$position = $p_position;
|
|
}
|
|
}
|
|
$connection = $this->getConnection();
|
|
if (MDB2::isError($connection)) {
|
|
return $connection;
|
|
}
|
|
static $prep_statement_counter = 1;
|
|
$randomStr = sprintf('%d', $prep_statement_counter++) . sha1(microtime() . sprintf('%d', mt_rand()));
|
|
$statement_name = sprintf($this->options['statement_format'], $this->phptype, $randomStr);
|
|
$statement_name = substr(strtolower($statement_name), 0, $this->options['max_identifiers_length']);
|
|
if (false === $pgtypes) {
|
|
$result = @pg_prepare($connection, $statement_name, $query);
|
|
if (!$result) {
|
|
$err = $this->raiseError(null, null, null,
|
|
'Unable to create prepared statement handle', __FUNCTION__);
|
|
return $err;
|
|
}
|
|
} else {
|
|
$types_string = '';
|
|
if ($pgtypes) {
|
|
$types_string = ' ('.implode(', ', $pgtypes).') ';
|
|
}
|
|
$query = 'PREPARE '.$statement_name.$types_string.' AS '.$query;
|
|
$statement = $this->_doQuery($query, true, $connection);
|
|
if (MDB2::isError($statement)) {
|
|
return $statement;
|
|
}
|
|
}
|
|
|
|
$class_name = 'MDB2_Statement_'.$this->phptype;
|
|
$obj = new $class_name($this, $statement_name, $positions, $query, $types, $result_types, $is_manip, $limit, $offset);
|
|
$this->debug($query, __FUNCTION__, array('is_manip' => $is_manip, 'when' => 'post', 'result' => $obj));
|
|
return $obj;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ function getSequenceName($sqn)
|
|
|
|
/**
|
|
* adds sequence name formatting to a sequence name
|
|
*
|
|
* @param string name of the sequence
|
|
*
|
|
* @return string formatted sequence name
|
|
*
|
|
* @access public
|
|
*/
|
|
function getSequenceName($sqn)
|
|
{
|
|
if (false === $this->options['disable_smart_seqname']) {
|
|
if (strpos($sqn, '_') !== false) {
|
|
list($table, $field) = explode('_', $sqn, 2);
|
|
}
|
|
$schema_list = $this->queryOne("SELECT array_to_string(current_schemas(false), ',')");
|
|
if (MDB2::isError($schema_list) || empty($schema_list) || count($schema_list) < 2) {
|
|
$order_by = ' a.attnum';
|
|
$schema_clause = ' AND n.nspname=current_schema()';
|
|
} else {
|
|
$schemas = explode(',', $schema_list);
|
|
$schema_clause = ' AND n.nspname IN ('.$schema_list.')';
|
|
$counter = 1;
|
|
$order_by = ' CASE ';
|
|
foreach ($schemas as $schema) {
|
|
$order_by .= ' WHEN n.nspname='.$schema.' THEN '.$counter++;
|
|
}
|
|
$order_by .= ' ELSE '.$counter.' END, a.attnum';
|
|
}
|
|
|
|
$query = "SELECT substring((SELECT substring(pg_get_expr(d.adbin, d.adrelid) for 128)
|
|
FROM pg_attrdef d
|
|
WHERE d.adrelid = a.attrelid
|
|
AND d.adnum = a.attnum
|
|
AND a.atthasdef
|
|
) FROM 'nextval[^'']*''([^'']*)')
|
|
FROM pg_attribute a
|
|
LEFT JOIN pg_class c ON c.oid = a.attrelid
|
|
LEFT JOIN pg_attrdef d ON d.adrelid = a.attrelid AND d.adnum = a.attnum AND a.atthasdef
|
|
LEFT JOIN pg_namespace n ON c.relnamespace = n.oid
|
|
WHERE (c.relname = ".$this->quote($sqn, 'text');
|
|
if (!empty($field)) {
|
|
$query .= " OR (c.relname = ".$this->quote($table, 'text')." AND a.attname = ".$this->quote($field, 'text').")";
|
|
}
|
|
$query .= " )"
|
|
.$schema_clause."
|
|
AND NOT a.attisdropped
|
|
AND a.attnum > 0
|
|
AND pg_get_expr(d.adbin, d.adrelid) LIKE 'nextval%'
|
|
ORDER BY ".$order_by;
|
|
$seqname = $this->queryOne($query);
|
|
if (!MDB2::isError($seqname) && !empty($seqname) && is_string($seqname)) {
|
|
return $seqname;
|
|
}
|
|
}
|
|
|
|
return parent::getSequenceName($sqn);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ nextID()
|
|
|
|
/**
|
|
* Returns the next free id of a sequence
|
|
*
|
|
* @param string $seq_name name of the sequence
|
|
* @param boolean $ondemand when true the sequence is
|
|
* automatic created, if it
|
|
* not exists
|
|
* @return mixed MDB2 Error Object or id
|
|
* @access public
|
|
*/
|
|
function nextID($seq_name, $ondemand = true)
|
|
{
|
|
$sequence_name = $this->quoteIdentifier($this->getSequenceName($seq_name), true);
|
|
$query = "SELECT NEXTVAL('$sequence_name')";
|
|
$this->pushErrorHandling(PEAR_ERROR_RETURN);
|
|
$this->expectError(MDB2_ERROR_NOSUCHTABLE);
|
|
$result = $this->queryOne($query, 'integer');
|
|
$this->popExpect();
|
|
$this->popErrorHandling();
|
|
if (MDB2::isError($result)) {
|
|
if ($ondemand && $result->getCode() == MDB2_ERROR_NOSUCHTABLE) {
|
|
$this->loadModule('Manager', null, true);
|
|
$result = $this->manager->createSequence($seq_name);
|
|
if (MDB2::isError($result)) {
|
|
return $this->raiseError($result, null, null,
|
|
'on demand sequence could not be created', __FUNCTION__);
|
|
}
|
|
return $this->nextId($seq_name, false);
|
|
}
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ lastInsertID()
|
|
|
|
/**
|
|
* Returns the autoincrement ID if supported or $id or fetches the current
|
|
* ID in a sequence called: $table.(empty($field) ? '' : '_'.$field)
|
|
*
|
|
* @param string $table name of the table into which a new row was inserted
|
|
* @param string $field name of the field into which a new row was inserted
|
|
* @return mixed MDB2 Error Object or id
|
|
* @access public
|
|
*/
|
|
function lastInsertID($table = null, $field = null)
|
|
{
|
|
if (empty($table) && empty($field)) {
|
|
return $this->queryOne('SELECT lastval()', 'integer');
|
|
}
|
|
$seq = $table.(empty($field) ? '' : '_'.$field);
|
|
$sequence_name = $this->quoteIdentifier($this->getSequenceName($seq), true);
|
|
return $this->queryOne("SELECT currval('$sequence_name')", 'integer');
|
|
}
|
|
|
|
// }}}
|
|
// {{{ 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 = $this->quoteIdentifier($this->getSequenceName($seq_name), true);
|
|
return $this->queryOne("SELECT last_value FROM $sequence_name", 'integer');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* MDB2 PostGreSQL result driver
|
|
*
|
|
* @package MDB2
|
|
* @category Database
|
|
* @author Paul Cooper <pgc@ucecom.com>
|
|
*/
|
|
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 (null !== $rownum) {
|
|
$seek = $this->seek($rownum);
|
|
if (MDB2::isError($seek)) {
|
|
return $seek;
|
|
}
|
|
}
|
|
if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {
|
|
$fetchmode = $this->db->fetchmode;
|
|
}
|
|
if ( $fetchmode == MDB2_FETCHMODE_ASSOC
|
|
|| $fetchmode == MDB2_FETCHMODE_OBJECT
|
|
) {
|
|
$row = @pg_fetch_array($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 (false === $this->result) {
|
|
$err = $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
|
'resultset has already been freed', __FUNCTION__);
|
|
return $err;
|
|
}
|
|
return null;
|
|
}
|
|
$mode = $this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL;
|
|
$rtrim = false;
|
|
if ($this->db->options['portability'] & MDB2_PORTABILITY_RTRIM) {
|
|
if (empty($this->types)) {
|
|
$mode += MDB2_PORTABILITY_RTRIM;
|
|
} else {
|
|
$rtrim = true;
|
|
}
|
|
}
|
|
if ($mode) {
|
|
$this->db->_fixResultArrayValues($row, $mode);
|
|
}
|
|
if ( ( $fetchmode != MDB2_FETCHMODE_ASSOC
|
|
&& $fetchmode != MDB2_FETCHMODE_OBJECT)
|
|
&& !empty($this->types)
|
|
) {
|
|
$row = $this->db->datatype->convertResultRow($this->types, $row, $rtrim);
|
|
} elseif (($fetchmode == MDB2_FETCHMODE_ASSOC
|
|
|| $fetchmode == MDB2_FETCHMODE_OBJECT)
|
|
&& !empty($this->types_assoc)
|
|
) {
|
|
$row = $this->db->datatype->convertResultRow($this->types_assoc, $row, $rtrim);
|
|
}
|
|
if (!empty($this->values)) {
|
|
$this->_assignBindColumns($row);
|
|
}
|
|
if ($fetchmode === MDB2_FETCHMODE_OBJECT) {
|
|
$object_class = $this->db->options['fetch_class'];
|
|
if ($object_class == 'stdClass') {
|
|
$row = (object) $row;
|
|
} else {
|
|
$rowObj = new $object_class($row);
|
|
$row = $rowObj;
|
|
}
|
|
}
|
|
++$this->rownum;
|
|
return $row;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _getColumnNames()
|
|
|
|
/**
|
|
* Retrieve the names of columns returned by the DBMS in a query result.
|
|
*
|
|
* @return mixed Array variable that holds the names of columns as keys
|
|
* or an MDB2 error on failure.
|
|
* Some DBMS may not return any columns when the result set
|
|
* does not contain any rows.
|
|
* @access private
|
|
*/
|
|
function _getColumnNames()
|
|
{
|
|
$columns = array();
|
|
$numcols = $this->numCols();
|
|
if (MDB2::isError($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 (null === $cols) {
|
|
if (false === $this->result) {
|
|
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
|
'resultset has already been freed', __FUNCTION__);
|
|
}
|
|
if (null === $this->result) {
|
|
return count($this->types);
|
|
}
|
|
return $this->db->raiseError(null, null, null,
|
|
'Could not get column count', __FUNCTION__);
|
|
}
|
|
return $cols;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ nextResult()
|
|
|
|
/**
|
|
* Move the internal result pointer to the next available result
|
|
*
|
|
* @return true on success, false if there is no more result set or an error object on failure
|
|
* @access public
|
|
*/
|
|
function nextResult()
|
|
{
|
|
$connection = $this->db->getConnection();
|
|
if (MDB2::isError($connection)) {
|
|
return $connection;
|
|
}
|
|
|
|
if (!($this->result = @pg_get_result($connection))) {
|
|
return false;
|
|
}
|
|
return MDB2_OK;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ free()
|
|
|
|
/**
|
|
* Free the internal resources associated with result.
|
|
*
|
|
* @return boolean true on success, false if result is invalid
|
|
* @access public
|
|
*/
|
|
function free()
|
|
{
|
|
if (is_resource($this->result) && $this->db->connection) {
|
|
$free = @pg_free_result($this->result);
|
|
if (false === $free) {
|
|
return $this->db->raiseError(null, null, null,
|
|
'Could not free result', __FUNCTION__);
|
|
}
|
|
}
|
|
$this->result = false;
|
|
return MDB2_OK;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* MDB2 PostGreSQL buffered result driver
|
|
*
|
|
* @package MDB2
|
|
* @category Database
|
|
* @author Paul Cooper <pgc@ucecom.com>
|
|
*/
|
|
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 (false === $this->result) {
|
|
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
|
'resultset has already been freed', __FUNCTION__);
|
|
}
|
|
if (null === $this->result) {
|
|
return MDB2_OK;
|
|
}
|
|
return $this->db->raiseError(MDB2_ERROR_INVALID, null, null,
|
|
'tried to seek to an invalid row number ('.$rownum.')', __FUNCTION__);
|
|
}
|
|
$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 = $this->numRows();
|
|
if (MDB2::isError($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 (null === $rows) {
|
|
if (false === $this->result) {
|
|
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
|
'resultset has already been freed', __FUNCTION__);
|
|
}
|
|
if (null === $this->result) {
|
|
return 0;
|
|
}
|
|
return $this->db->raiseError(null, null, null,
|
|
'Could not get row count', __FUNCTION__);
|
|
}
|
|
return $rows;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* MDB2 PostGreSQL statement driver
|
|
*
|
|
* @package MDB2
|
|
* @category Database
|
|
* @author Paul Cooper <pgc@ucecom.com>
|
|
*/
|
|
class MDB2_Statement_pgsql extends MDB2_Statement_Common
|
|
{
|
|
// {{{ _execute()
|
|
|
|
/**
|
|
* Execute a prepared query statement helper method.
|
|
*
|
|
* @param mixed $result_class string which specifies which result class to use
|
|
* @param mixed $result_wrap_class string which specifies which class to wrap results in
|
|
*
|
|
* @return mixed MDB2_Result or integer (affected rows) on success,
|
|
* a MDB2 error on failure
|
|
* @access private
|
|
*/
|
|
function _execute($result_class = true, $result_wrap_class = true)
|
|
{
|
|
if (null === $this->statement) {
|
|
return parent::_execute($result_class, $result_wrap_class);
|
|
}
|
|
$this->db->last_query = $this->query;
|
|
$this->db->debug($this->query, 'execute', array('is_manip' => $this->is_manip, 'when' => 'pre', 'parameters' => $this->values));
|
|
if ($this->db->getOption('disable_query')) {
|
|
$result = $this->is_manip ? 0 : null;
|
|
return $result;
|
|
}
|
|
|
|
$connection = $this->db->getConnection();
|
|
if (MDB2::isError($connection)) {
|
|
return $connection;
|
|
}
|
|
|
|
$query = false;
|
|
$parameters = array();
|
|
// todo: disabled until pg_execute() bytea issues are cleared up
|
|
if (true || !function_exists('pg_execute')) {
|
|
$query = 'EXECUTE '.$this->statement;
|
|
}
|
|
if (!empty($this->positions)) {
|
|
foreach ($this->positions as $parameter) {
|
|
if (!array_key_exists($parameter, $this->values)) {
|
|
return $this->db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
|
|
'Unable to bind to missing placeholder: '.$parameter, __FUNCTION__);
|
|
}
|
|
$value = $this->values[$parameter];
|
|
$type = array_key_exists($parameter, $this->types) ? $this->types[$parameter] : null;
|
|
if (is_resource($value) || $type == 'clob' || $type == 'blob' || $this->db->options['lob_allow_url_include']) {
|
|
if (!is_resource($value) && preg_match('/^(\w+:\/\/)(.*)$/', $value, $match)) {
|
|
if ($match[1] == 'file://') {
|
|
$value = $match[2];
|
|
}
|
|
$value = @fopen($value, 'r');
|
|
$close = true;
|
|
}
|
|
if (is_resource($value)) {
|
|
$data = '';
|
|
while (!@feof($value)) {
|
|
$data.= @fread($value, $this->db->options['lob_buffer_length']);
|
|
}
|
|
if ($close) {
|
|
@fclose($value);
|
|
}
|
|
$value = $data;
|
|
}
|
|
}
|
|
$quoted = $this->db->quote($value, $type, $query);
|
|
if (MDB2::isError($quoted)) {
|
|
return $quoted;
|
|
}
|
|
$parameters[] = $quoted;
|
|
}
|
|
if ($query) {
|
|
$query.= ' ('.implode(', ', $parameters).')';
|
|
}
|
|
}
|
|
|
|
if (!$query) {
|
|
$result = @pg_execute($connection, $this->statement, $parameters);
|
|
if (!$result) {
|
|
$err = $this->db->raiseError(null, null, null,
|
|
'Unable to execute statement', __FUNCTION__);
|
|
return $err;
|
|
}
|
|
} else {
|
|
$result = $this->db->_doQuery($query, $this->is_manip, $connection);
|
|
if (MDB2::isError($result)) {
|
|
return $result;
|
|
}
|
|
}
|
|
|
|
if ($this->is_manip) {
|
|
$affected_rows = $this->db->_affectedRows($connection, $result);
|
|
return $affected_rows;
|
|
}
|
|
|
|
$result = $this->db->_wrapResult($result, $this->result_types,
|
|
$result_class, $result_wrap_class, $this->limit, $this->offset);
|
|
$this->db->debug($this->query, 'execute', array('is_manip' => $this->is_manip, 'when' => 'post', 'result' => $result));
|
|
return $result;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ free()
|
|
|
|
/**
|
|
* Release resources allocated for the specified prepared query.
|
|
*
|
|
* @return mixed MDB2_OK on success, a MDB2 error on failure
|
|
* @access public
|
|
*/
|
|
function free()
|
|
{
|
|
if (null === $this->positions) {
|
|
return $this->db->raiseError(MDB2_ERROR, null, null,
|
|
'Prepared statement has already been freed', __FUNCTION__);
|
|
}
|
|
$result = MDB2_OK;
|
|
|
|
if (null !== $this->statement) {
|
|
$connection = $this->db->getConnection();
|
|
if (MDB2::isError($connection)) {
|
|
return $connection;
|
|
}
|
|
$query = 'DEALLOCATE PREPARE '.$this->statement;
|
|
$result = $this->db->_doQuery($query, true, $connection);
|
|
}
|
|
|
|
parent::free();
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* drop an existing table
|
|
*
|
|
* @param string $name name of the table that should be dropped
|
|
* @return mixed MDB2_OK on success, a MDB2 error on failure
|
|
* @access public
|
|
*/
|
|
function dropTable($name)
|
|
{
|
|
$db = $this->getDBInstance();
|
|
if (MDB2::isError($db)) {
|
|
return $db;
|
|
}
|
|
|
|
$name = $db->quoteIdentifier($name, true);
|
|
$result = $db->exec("DROP TABLE $name");
|
|
|
|
if (MDB2::isError($result)) {
|
|
$result = $db->exec("DROP TABLE $name CASCADE");
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
}
|
|
?>
|