mirror of
https://github.com/PostgreSQL-For-Wordpress/postgresql-for-wordpress.git
synced 2025-10-04 00:30:54 +02:00
91eca9bb41
git-svn-id: https://plugins.svn.wordpress.org/postgresql-for-wordpress/trunk@191290 b8457f37-d9ea-0310-8a92-e5e31aec5664
466 lines
16 KiB
PHP
466 lines
16 KiB
PHP
<?php
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/**
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* @package PostgreSQL_For_Wordpress
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* @version $Id$
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* @author Hawk__, www.hawkix.net
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*/
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/**
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* Provides a driver for PostgreSQL
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*
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* This file maps original mysql_* functions with PostgreSQL equivalents
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*
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* This was originally based on usleepless's original 'mysql2pgsql.php' file, many thanks to him
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*/
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// List of types translations (the key is the mysql one, the value is the text to use instead)
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$GLOBALS['pg4wp_ttr'] = array(
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'bigint(20)' => 'bigint',
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'bigint(10)' => 'int',
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'int(11)' => 'int',
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'tinytext' => 'text',
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'mediumtext' => 'text',
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'longtext' => 'text',
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'unsigned' => '',
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'gmt datetime NOT NULL default \'0000-00-00 00:00:00\'' => 'gmt timestamp NOT NULL DEFAULT timezone(\'gmt\'::text, now())',
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'default \'0000-00-00 00:00:00\'' => 'DEFAULT now()',
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'datetime' => 'timestamp',
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'DEFAULT CHARACTER SET utf8' => '',
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// WP 2.7.1 compatibility
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'int(4)' => 'smallint',
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// ZdMultiLang support hack
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'term_id varchar(5)' => 'term_id int',
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'BIGINT(20)' => 'int',
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'character set utf8' => '',
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'CHARACTER SET utf8' => '',
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'UNSIGNED' => '', // ZdMultilang 1.2.5
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);
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// Initializing some variables
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$GLOBALS['pg4wp_result'] = 0;
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$GLOBALS['pg4wp_numrows'] = '10';
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$GLOBALS['pg4wp_ins_table'] = '';
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$GLOBALS['pg4wp_ins_field'] = '';
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$GLOBALS['pg4wp_user'] = $GLOBALS['pg4wp_password'] = $GLOBALS['pg4wp_server'] = '';
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function wpsql_num_rows($result)
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{ return pg_num_rows($result); }
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function wpsql_numrows($result)
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{ return pg_num_rows($result); }
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function wpsql_num_fields($result)
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{ return 1; }
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function wpsql_fetch_field($result)
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{ return 'tablename'; }
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function wpsql_fetch_object($result)
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{ return pg_fetch_object($result); }
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function wpsql_free_result($result)
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{ return pg_free_result($result); }
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function wpsql_affected_rows()
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{
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if( $GLOBALS['pg4wp_result'] === false)
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return 0;
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else
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return pg_affected_rows($GLOBALS['pg4wp_result']);
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}
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function wpsql_fetch_row($result)
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{ return pg_fetch_row($result); }
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function wpsql_data_seek($result, $offset)
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{ return pg_result_seek ( $result, $offset ); }
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function wpsql_error()
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{ if( $GLOBALS['pg4wp_user'] == '') return pg_last_error(); else return ''; }
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function wpsql_fetch_assoc($result) { return pg_fetch_assoc($result); }
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function wpsql_escape_string($s) { return pg_escape_string($s); }
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function wpsql_get_server_info() { return '4.1.3'; } // Just want to fool wordpress ...
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function wpsql_result($result, $i, $fieldname)
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{ return pg_fetch_result($result, $i, $fieldname); }
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// This is a fake connection
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function wpsql_connect($dbserver, $dbuser, $dbpass)
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{
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$GLOBALS['pg4wp_user'] = $dbuser;
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$GLOBALS['pg4wp_password'] = $dbpass;
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$GLOBALS['pg4wp_server'] = $dbserver;
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return 1;
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}
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function wpsql_select_db($dbname, $connection_id = 0)
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{
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$pg_user = $GLOBALS['pg4wp_user'];
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$pg_password = $GLOBALS['pg4wp_password'];
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$pg_server = $GLOBALS['pg4wp_server'];
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if( empty( $pg_server))
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$conn = pg_connect("user=$pg_user password=$pg_password dbname=$dbname");
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else
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$conn = pg_connect("host=$pg_server user=$pg_user password=$pg_password dbname=$dbname");
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// Now we should be connected, we "forget" about the connection parameters
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$GLOBALS['pg4wp_user'] = '';
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$GLOBALS['pg4wp_password'] = '';
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$GLOBALS['pg4wp_server'] = '';
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return $conn;
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}
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function wpsql_fetch_array($result)
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{
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$res = pg_fetch_array($result);
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if( is_array($res) )
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foreach($res as $v => $k )
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$res[$v] = trim($k);
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return $res;
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}
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function wpsql_query($sql)
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{
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global $table_prefix;
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$logto = 'queries';
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// This is used to catch the number of rows returned by the last "SELECT" REQUEST
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$catchnumrows = false;
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// Remove unusefull spaces
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$initial = $sql = trim($sql);
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// Remove illegal characters
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$sql = str_replace('`', '', $sql);
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// Field names with CAPITALS need special handling
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if( false !== strpos($sql, 'ID'))
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{
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$pattern = '/ID([^ ])/';
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$sql = preg_replace($pattern, 'ID $1', $sql);
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$pattern = '/ID$/';
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$sql = preg_replace($pattern, 'ID ', $sql);
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$pattern = '/\(ID/';
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$sql = preg_replace($pattern, '( ID', $sql);
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$pattern = '/,ID/';
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$sql = preg_replace($pattern, ', ID', $sql);
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$pattern = '/[a-zA-Z_]+ID/';
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$sql = preg_replace($pattern, '"$0"', $sql);
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$pattern = '/\.ID/';
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$sql = preg_replace($pattern, '."ID"', $sql);
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$pattern = '/[\s]ID /';
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$sql = preg_replace($pattern, ' "ID" ', $sql);
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} // CAPITALS
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if( 0 === strpos($sql, 'SELECT'))
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{
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$logto = 'SELECT';
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// SQL_CALC_FOUND_ROWS doesn't exist in PostgreSQL but it's needed for correct paging
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if( false !== strpos($sql, 'SQL_CALC_FOUND_ROWS'))
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{
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$catchnumrows = true;
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$sql = str_replace('SQL_CALC_FOUND_ROWS', 'DISTINCT', $sql);
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$GLOBALS['pg4wp_numrows'] = preg_replace( '/SELECT DISTINCT.+FROM ('.$table_prefix.'posts)/', 'SELECT DISTINCT "ID" FROM $1', $sql);
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$GLOBALS['pg4wp_numrows'] = preg_replace( '/SELECT(.+)FROM/', 'SELECT COUNT($1) FROM', $GLOBALS['pg4wp_numrows']);
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$GLOBALS['pg4wp_numrows'] = preg_replace( '/(ORDER BY|LIMIT).+/', '', $GLOBALS['pg4wp_numrows']);
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}
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elseif( false !== strpos($sql, 'FOUND_ROWS()'))
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{
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$sql = $GLOBALS['pg4wp_numrows'];
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}
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$pattern = '/LIMIT[ ]+(\d+),[ ]*(\d+)/';
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$sql = preg_replace($pattern, 'LIMIT $2 OFFSET $1', $sql);
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$sql = str_replace('INTERVAL 120 MINUTE', "'120 minutes'::interval", $sql);
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$pattern = '/DATE_ADD[ ]*\(([^,]+),([^\)]+)\)/';
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$sql = preg_replace( $pattern, '($1 + $2)', $sql);
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$date_funcs = array(
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'YEAR(' => 'EXTRACT(YEAR FROM ',
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'MONTH(' => 'EXTRACT(MONTH FROM ',
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'DAY(' => 'EXTRACT(DAY FROM ',
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);
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$sql = str_replace( 'ORDER BY post_date DESC', 'ORDER BY YEAR(post_date) DESC, MONTH(post_date) DESC', $sql);
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$sql = str_replace( array_keys($date_funcs), array_values($date_funcs), $sql);
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// MySQL 'IF' conversion
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$pattern = '/IF[ ]*\(([^,]+),([^,]+),([^\)]+)\)/';
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$sql = preg_replace( $pattern, 'CASE WHEN $1 THEN $2 ELSE $3 END', $sql);
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$sql = str_replace('GROUP BY '.$table_prefix.'posts."ID"', '' , $sql);
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$sql = str_replace("!= ''", '<> 0', $sql);
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// MySQL 'LIKE' is case insensitive by default, whereas PostgreSQL 'LIKE' is
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$sql = str_replace( ' LIKE ', ' ILIKE ', $sql);
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// INDEXES are not yet supported
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if( false !== strpos( $sql, 'USE INDEX (comment_date_gmt)'))
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$sql = str_replace( 'USE INDEX (comment_date_gmt)', '', $sql);
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// ZdMultiLang support hacks
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$sql = preg_replace( '/post_type="([^"]+)"/', 'post_type=\'$1\'', $sql);
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$sql = str_replace( 'link_url o_url', 'link_url AS o_url', $sql);
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$sql = str_replace( 'link_name o_name', 'link_name AS o_name', $sql);
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$sql = str_replace( 'link_description o_desc', 'link_description AS o_desc', $sql);
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} // SELECT
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elseif( 0 === strpos($sql, 'UPDATE'))
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{
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$logto = 'UPDATE';
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$pattern = '/LIMIT[ ]+\d+/';
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$sql = preg_replace($pattern, '', $sql);
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// WP 2.6.1 => 2.8 upgrade, removes a PostgreSQL error but there are some remaining
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$sql = str_replace( "post_date = '0000-00-00 00:00:00'", "post_date IS NULL", $sql);
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} // UPDATE
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elseif( 0 === strpos($sql, 'INSERT'))
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{
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$logto = 'INSERT';
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$sql = str_replace('(0,',"('0',", $sql);
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$sql = str_replace('(1,',"('1',", $sql);
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$pattern = '/INSERT INTO (\w+)\s+\([ a-zA-Z_"]+/';
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preg_match($pattern, $sql, $matches);
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$GLOBALS['pg4wp_ins_table'] = $matches[1];
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$match_list = split(' ', $matches[0]);
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if( $GLOBALS['pg4wp_ins_table'])
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{
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$GLOBALS['pg4wp_ins_field'] = trim($match_list[3],' () ');
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if(! $GLOBALS['pg4wp_ins_field'])
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$GLOBALS['pg4wp_ins_field'] = trim($match_list[4],' () ');
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}
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// ZdMultiLang support hack
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if( $GLOBALS['pg4wp_ins_table'] == $table_prefix.'zd_ml_trans')
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{
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preg_match( '/VALUES \([^\d]*(\d+)', $sql, $matches);
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$GLOBALS['pg4wp_insid'] = $matches[1];
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}
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// Fix inserts into wp_categories
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if( false !== strpos($sql, 'INSERT INTO '.$table_prefix.'categories'))
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{
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$sql = str_replace('"cat_ID",', '', $sql);
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$sql = str_replace("VALUES ('0',", "VALUES(", $sql);
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}
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// Those are used when we need to set the date to now() in gmt time
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$sql = str_replace( "'0000-00-00 00:00:00'", 'now() AT TIME ZONE \'gmt\'', $sql);
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// Multiple values group when calling INSERT INTO don't always work
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if( false !== strpos( $sql, $table_prefix.'options') && false !== strpos( $sql, '), ('))
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{
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$pattern = '/INSERT INTO.+VALUES/';
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preg_match($pattern, $sql, $matches);
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$insert = $matches[0];
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$sql = str_replace( '), (', ');'.$insert.'(', $sql);
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}
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// To avoid Encoding errors when inserting data coming from outside
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if( preg_match('/^.{1}/us',$sql,$ar) != 1)
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$sql = utf8_encode($sql);
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} // INSERT
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elseif( 0 === strpos( $sql, 'DELETE' ))
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{
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$logto = 'DELETE';
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// LIMIT is not allowed in DELETE queries
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$sql = str_replace( 'LIMIT 1', '', $sql);
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}
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// Fix tables listing
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elseif( 0 === strpos($sql, 'SHOW TABLES'))
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{
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$logto = 'SHOWTABLES';
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$sql = 'SELECT tablename FROM pg_tables WHERE schemaname = \'public\';';
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}
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// SHOW INDEX emulation
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elseif( 0 === strpos( $sql, 'SHOW INDEX'))
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{
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$logto = 'SHOWINDEX';
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$pattern = '/SHOW INDEX FROM\s+(\w+)/';
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preg_match( $pattern, $sql, $matches);
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$table = $matches[1];
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$sql = 'SELECT bc.relname AS "Table",
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CASE WHEN i.indisunique THEN \'0\' ELSE \'1\' END AS "Non_unique",
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CASE WHEN i.indisprimary THEN \'PRIMARY\' WHEN bc.relname LIKE \'%usermeta\' AND ic.relname = \'umeta_key\' THEN \'meta_key\' ELSE ic.relname END AS "Key_name",
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a.attname AS "Column_name",
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NULL AS "Sub_part"
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FROM pg_class bc, pg_class ic, pg_index i, pg_attribute a
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WHERE bc.oid = i.indrelid
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AND ic.oid = i.indexrelid
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AND (i.indkey[0] = a.attnum OR i.indkey[1] = a.attnum OR i.indkey[2] = a.attnum OR i.indkey[3] = a.attnum OR i.indkey[4] = a.attnum OR i.indkey[5] = a.attnum OR i.indkey[6] = a.attnum OR i.indkey[7] = a.attnum)
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AND a.attrelid = bc.oid
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AND bc.relname = \''.$table.'\'
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ORDER BY a.attname;';
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}
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// Table alteration
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elseif( 0 === strpos( $sql, 'ALTER TABLE'))
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{
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$logto = 'ALTER';
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$pattern = '/ALTER TABLE\s+(\w+)\s+CHANGE COLUMN\s+([^\s]+)\s+([^\s]+)\s+([^ ]+)( unsigned|)\s+(NOT NULL|)\s*(default (.+)|)/';
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if( 1 === preg_match( $pattern, $sql, $matches))
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{
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$table = $matches[1];
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$col = $matches[2];
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$newname = $matches[3];
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$type = $matches[4];
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if( isset($GLOBALS['pg4wp_ttr'][$type]))
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$type = $GLOBALS['pg4wp_ttr'][$type];
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$unsigned = $matches[5];
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$notnull = $matches[6];
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$default = $matches[7];
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$defval = $matches[8];
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if( isset($GLOBALS['pg4wp_ttr'][$defval]))
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$defval = $GLOBALS['pg4wp_ttr'][$defval];
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$newq = "ALTER TABLE $table ALTER COLUMN $col TYPE $type";
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if( !empty($notnull))
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$newq .= ", ALTER COLUMN $col SET NOT NULL";
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if( !empty($default))
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$newq .= ", ALTER COLUMN $col SET DEFAULT $defval";
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if( $col != $newname)
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$newq .= ";ALTER TABLE $table RENAME COLUMN $col TO $newcol;";
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$sql = $newq;
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}
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$pattern = '/ALTER TABLE\s+(\w+)\s+ADD (UNIQUE |)KEY\s+([^\s]+)\s+\(([^\)]+)\)/';
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if( 1 === preg_match( $pattern, $sql, $matches))
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{
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$table = $matches[1];
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$unique = $matches[2];
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$index = $matches[3];
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$columns = $matches[4];
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// Workaround for index name duplicate
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if( $table == $table_prefix.'usermeta' && $index == 'meta_key')
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$index = 'umeta_key';
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$sql = "CREATE {$unique}INDEX $index ON $table ($columns)";
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}
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}
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// Table description
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elseif( 0 === strpos( $sql, 'DESCRIBE'))
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{
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$logto = 'DESCRIBE';
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preg_match( '/DESCRIBE\s+(\w+)/', $sql, $matches);
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$table_name = $matches[1];
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$sql = "SELECT pg_attribute.attname AS \"Field\",
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CASE pg_type.typname
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WHEN 'int2' THEN 'int(4)'
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WHEN 'int4' THEN 'int(11)'
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WHEN 'int8' THEN 'bigint(20) unsigned'
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WHEN 'varchar' THEN 'varchar(' || pg_attribute.atttypmod-4 || ')'
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WHEN 'timestamp' THEN 'datetime'
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WHEN 'text' THEN 'longtext'
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ELSE pg_type.typname
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END AS \"Type\",
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CASE WHEN pg_attribute.attnotnull THEN ''
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ELSE 'YES'
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END AS \"Null\",
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CASE pg_type.typname
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WHEN 'varchar' THEN substring(pg_attrdef.adsrc FROM '^\'(.*)\'.*$')
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WHEN 'timestamp' THEN CASE WHEN pg_attrdef.adsrc LIKE '%now()%' THEN '0000-00-00 00:00:00' ELSE pg_attrdef.adsrc END
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ELSE pg_attrdef.adsrc
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END AS \"Default\"
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FROM pg_class
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INNER JOIN pg_attribute
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ON (pg_class.oid=pg_attribute.attrelid)
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INNER JOIN pg_type
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ON (pg_attribute.atttypid=pg_type.oid)
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LEFT JOIN pg_attrdef
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ON (pg_class.oid=pg_attrdef.adrelid AND pg_attribute.attnum=pg_attrdef.adnum)
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WHERE pg_class.relname='$table_name' AND pg_attribute.attnum>=1 AND NOT pg_attribute.attisdropped;";
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} // DESCRIBE
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// Fix table creations
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elseif( 0 === strpos($sql, 'CREATE TABLE'))
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{
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$logto = 'CREATE';
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$pattern = '/CREATE TABLE (\w+)/';
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preg_match($pattern, $sql, $matches);
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$table = $matches[1];
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// Remove trailing spaces
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$sql = trim( $sql).';';
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// Translate types and some other replacements
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$sql = str_replace(
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array_keys($GLOBALS['pg4wp_ttr']), array_values($GLOBALS['pg4wp_ttr']), $sql);
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// Fix auto_increment by adding a sequence
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$pattern = '/int[ ]+NOT NULL auto_increment/';
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preg_match($pattern, $sql, $matches);
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if($matches)
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{
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$seq = $table . '_seq';
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$sql = str_replace( 'NOT NULL auto_increment', "NOT NULL DEFAULT nextval('$seq'::text)", $sql);
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$sql .= "\nCREATE SEQUENCE $seq;";
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}
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// Support for INDEX creation
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$pattern = '/,\s+(UNIQUE |)KEY\s+([^\s]+)\s+\(([^\)]+)\)/';
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if( preg_match_all( $pattern, $sql, $matches, PREG_SET_ORDER))
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foreach( $matches as $match)
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{
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$unique = $match[1];
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$index = $match[2];
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$columns = $match[3];
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// Workaround for index name duplicate
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if( $table == $table_prefix.'usermeta' && $index == 'meta_key')
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$index = 'umeta_key';
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$sql .= "\nCREATE {$unique}INDEX $index ON $table ($columns);";
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}
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// Now remove handled indexes
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$sql = preg_replace( $pattern, '', $sql);
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}// CREATE TABLE
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// Empty "IN" statements are erroneous
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$sql = str_replace( 'IN (\'\')', 'IN (NULL)', $sql);
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$sql = str_replace( 'IN ( \'\' )', 'IN (NULL)', $sql);
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$sql = str_replace( 'IN ()', 'IN (NULL)', $sql);
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// ZdMultiLang 1.2.4 uses a lowercase 'in'
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$sql = str_replace( 'in ()', 'IN (NULL)', $sql);
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// ZdMultiLang support hack, some columns have capitals in their name, and that needs special handling for PostgreSQL
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if( false !== strpos( $sql, $table_prefix.'zd_ml_langs'))
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{
|
|
$zdml_conv = array(
|
|
'LanguageName' => '"LanguageName"',
|
|
'LangPermalink' => '"LangPermalink"',
|
|
'BlogName' => '"BlogName"',
|
|
'BlogDescription' => '"BlogDescription"',
|
|
);
|
|
$sql = str_replace( array_keys($zdml_conv), array_values($zdml_conv), $sql);
|
|
}
|
|
|
|
if( PG4WP_DEBUG)
|
|
{
|
|
if( $initial != $sql)
|
|
error_log("Converting :\n$initial\n---- to ----\n$sql\n---------------------\n", 3, PG4WP_LOG.'pg4wp_'.$logto.'.log');
|
|
else
|
|
error_log("$sql\n---------------------\n", 3, PG4WP_LOG.'pg4wp_unmodified.log');
|
|
}
|
|
$GLOBALS['pg4wp_result'] = pg_query($sql);
|
|
if( PG4WP_DEBUG && $GLOBALS['pg4wp_result'] === false && $err = pg_last_error())
|
|
if( false === strpos($err, 'relation "'.$table_prefix.'options"'))
|
|
error_log("Error running :\n$initial\n---- converted to ----\n$sql\n----\n$err\n---------------------\n", 3, PG4WP_LOG.'pg4wp_errors.log');
|
|
|
|
return $GLOBALS['pg4wp_result'];
|
|
}
|
|
|
|
function wpsql_insert_id($table)
|
|
{
|
|
global $table_prefix;
|
|
$ins_field = $GLOBALS['pg4wp_ins_field'];
|
|
|
|
$tbls = split("\n", $GLOBALS['pg4wp_ins_table']); // Workaround for bad tablename
|
|
$t = $tbls[0] . '_seq';
|
|
|
|
// ZdMultiLang support hack
|
|
if( $tbls[0] == $table_prefix.'zd_ml_trans')
|
|
return $GLOBALS['pg4wp_insid'];
|
|
|
|
if( in_array( $t, array( '_seq', $table_prefix.'term_relationships_seq')))
|
|
return 0;
|
|
|
|
if( $ins_field == '"cat_ID"' || $ins_field == 'rel_id')
|
|
$sql = "SELECT MAX($ins_field) FROM $ins_table";
|
|
else
|
|
$sql = "SELECT CURRVAL('$t')";
|
|
|
|
$res = pg_query($sql);
|
|
$data = pg_fetch_result($res, 0, 0);
|
|
if( PG4WP_DEBUG && $sql)
|
|
error_log("Getting : $sql => $data\n", 3, PG4WP_LOG.'pg4wp_insertid.log');
|
|
return $data;
|
|
}
|