Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | RSS feed
<?php/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: *//*** The PEAR DB driver for PHP's pgsql extension* for interacting with PostgreSQL databases** PHP versions 4 and 5** LICENSE: This source file is subject to version 3.0 of the PHP license* that is available through the world-wide-web at the following URI:* http://www.php.net/license/3_0.txt. If you did not receive a copy of* the PHP License and are unable to obtain it through the web, please* send a note to license@php.net so we can mail you a copy immediately.** @category Database* @package DB* @author Rui Hirokawa <hirokawa@php.net>* @author Stig Bakken <ssb@php.net>* @author Daniel Convissor <danielc@php.net>* @copyright 1997-2005 The PHP Group* @license http://www.php.net/license/3_0.txt PHP License 3.0* @version CVS: $Id: pgsql.php,v 1.1 2005-03-30 08:50:33 jpm Exp $* @link http://pear.php.net/package/DB*//*** Obtain the DB_common class so it can be extended from*/require_once 'DB/common.php';/*** The methods PEAR DB uses to interact with PHP's pgsql extension* for interacting with PostgreSQL databases** These methods overload the ones declared in DB_common.** @category Database* @package DB* @author Rui Hirokawa <hirokawa@php.net>* @author Stig Bakken <ssb@php.net>* @author Daniel Convissor <danielc@php.net>* @copyright 1997-2005 The PHP Group* @license http://www.php.net/license/3_0.txt PHP License 3.0* @version Release: 1.7.5* @link http://pear.php.net/package/DB*/class DB_pgsql extends DB_common{// {{{ properties/*** The DB driver type (mysql, oci8, odbc, etc.)* @var string*/var $phptype = 'pgsql';/*** The database syntax variant to be used (db2, access, etc.), if any* @var string*/var $dbsyntax = 'pgsql';/*** The capabilities of this DB implementation** The 'new_link' element contains the PHP version that first provided* new_link support for this DBMS. Contains false if it's unsupported.** Meaning of the 'limit' element:* + 'emulate' = emulate with fetch row by number* + 'alter' = alter the query* + false = skip rows** @var array*/var $features = array('limit' => 'alter','new_link' => '4.3.0','numrows' => true,'pconnect' => true,'prepare' => false,'ssl' => true,'transactions' => true,);/*** A mapping of native error codes to DB error codes* @var array*/var $errorcode_map = array();/*** The raw database connection created by PHP* @var resource*/var $connection;/*** The DSN information for connecting to a database* @var array*/var $dsn = array();/*** Should data manipulation queries be committed automatically?* @var bool* @access private*/var $autocommit = true;/*** The quantity of transactions begun** {@internal While this is private, it can't actually be designated* private in PHP 5 because it is directly accessed in the test suite.}}** @var integer* @access private*/var $transaction_opcount = 0;/*** The number of rows affected by a data manipulation query* @var integer*/var $affected = 0;/*** The current row being looked at in fetchInto()* @var array* @access private*/var $row = array();/*** The number of rows in a given result set* @var array* @access private*/var $_num_rows = array();// }}}// {{{ constructor/*** This constructor calls <kbd>$this->DB_common()</kbd>** @return void*/function DB_pgsql(){$this->DB_common();}// }}}// {{{ connect()/*** Connect to the database server, log in and open the database** Don't call this method directly. Use DB::connect() instead.** PEAR DB's pgsql driver supports the following extra DSN options:* + connect_timeout How many seconds to wait for a connection to* be established. Available since PEAR DB 1.7.0.* + new_link If set to true, causes subsequent calls to* connect() to return a new connection link* instead of the existing one. WARNING: this is* not portable to other DBMS's. Available only* if PHP is >= 4.3.0 and PEAR DB is >= 1.7.0.* + options Command line options to be sent to the server.* Available since PEAR DB 1.6.4.* + service Specifies a service name in pg_service.conf that* holds additional connection parameters.* Available since PEAR DB 1.7.0.* + sslmode How should SSL be used when connecting? Values:* disable, allow, prefer or require.* Available since PEAR DB 1.7.0.* + tty This was used to specify where to send server* debug output. Available since PEAR DB 1.6.4.** Example of connecting to a new link via a socket:* <code>* require_once 'DB.php';** $dsn = 'pgsql://user:pass@unix(/tmp)/dbname?new_link=true';* $options = array(* 'portability' => DB_PORTABILITY_ALL,* );** $db =& DB::connect($dsn, $options);* if (PEAR::isError($db)) {* die($db->getMessage());* }* </code>** @param array $dsn the data source name* @param bool $persistent should the connection be persistent?** @return int DB_OK on success. A DB_Error object on failure.** @link http://www.postgresql.org/docs/current/static/libpq.html#LIBPQ-CONNECT*/function connect($dsn, $persistent = false){if (!PEAR::loadExtension('pgsql')) {return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);}$this->dsn = $dsn;if ($dsn['dbsyntax']) {$this->dbsyntax = $dsn['dbsyntax'];}$protocol = $dsn['protocol'] ? $dsn['protocol'] : 'tcp';$params = array('');if ($protocol == 'tcp') {if ($dsn['hostspec']) {$params[0] .= 'host=' . $dsn['hostspec'];}if ($dsn['port']) {$params[0] .= ' port=' . $dsn['port'];}} elseif ($protocol == 'unix') {// Allow for pg socket in non-standard locations.if ($dsn['socket']) {$params[0] .= 'host=' . $dsn['socket'];}if ($dsn['port']) {$params[0] .= ' port=' . $dsn['port'];}}if ($dsn['database']) {$params[0] .= ' dbname=\'' . addslashes($dsn['database']) . '\'';}if ($dsn['username']) {$params[0] .= ' user=\'' . addslashes($dsn['username']) . '\'';}if ($dsn['password']) {$params[0] .= ' password=\'' . addslashes($dsn['password']) . '\'';}if (!empty($dsn['options'])) {$params[0] .= ' options=' . $dsn['options'];}if (!empty($dsn['tty'])) {$params[0] .= ' tty=' . $dsn['tty'];}if (!empty($dsn['connect_timeout'])) {$params[0] .= ' connect_timeout=' . $dsn['connect_timeout'];}if (!empty($dsn['sslmode'])) {$params[0] .= ' sslmode=' . $dsn['sslmode'];}if (!empty($dsn['service'])) {$params[0] .= ' service=' . $dsn['service'];}if (isset($dsn['new_link'])&& ($dsn['new_link'] == 'true' || $dsn['new_link'] === true)){if (version_compare(phpversion(), '4.3.0', '>=')) {$params[] = PGSQL_CONNECT_FORCE_NEW;}}$connect_function = $persistent ? 'pg_pconnect' : 'pg_connect';$ini = ini_get('track_errors');$php_errormsg = '';if ($ini) {$this->connection = @call_user_func_array($connect_function,$params);} else {ini_set('track_errors', 1);$this->connection = @call_user_func_array($connect_function,$params);ini_set('track_errors', $ini);}if (!$this->connection) {return $this->raiseError(DB_ERROR_CONNECT_FAILED,null, null, null,$php_errormsg);}return DB_OK;}// }}}// {{{ disconnect()/*** Disconnects from the database server** @return bool TRUE on success, FALSE on failure*/function disconnect(){$ret = @pg_close($this->connection);$this->connection = null;return $ret;}// }}}// {{{ simpleQuery()/*** Sends a query to the database server** @param string the SQL query string** @return mixed + a PHP result resrouce for successful SELECT queries* + the DB_OK constant for other successful queries* + a DB_Error object on failure*/function simpleQuery($query){$ismanip = DB::isManip($query);$this->last_query = $query;$query = $this->modifyQuery($query);if (!$this->autocommit && $ismanip) {if ($this->transaction_opcount == 0) {$result = @pg_exec($this->connection, 'begin;');if (!$result) {return $this->pgsqlRaiseError();}}$this->transaction_opcount++;}$result = @pg_exec($this->connection, $query);if (!$result) {return $this->pgsqlRaiseError();}// Determine which queries that should return data, and which// should return an error code only.if ($ismanip) {$this->affected = @pg_affected_rows($result);return DB_OK;} elseif (preg_match('/^\s*\(*\s*(SELECT|EXPLAIN|SHOW)\s/si', $query)) {/* PostgreSQL commands:ABORT, ALTER, BEGIN, CLOSE, CLUSTER, COMMIT, COPY,CREATE, DECLARE, DELETE, DROP TABLE, EXPLAIN, FETCH,GRANT, INSERT, LISTEN, LOAD, LOCK, MOVE, NOTIFY, RESET,REVOKE, ROLLBACK, SELECT, SELECT INTO, SET, SHOW,UNLISTEN, UPDATE, VACUUM*/$this->row[(int)$result] = 0; // reset the row counter.$numrows = $this->numRows($result);if (is_object($numrows)) {return $numrows;}$this->_num_rows[(int)$result] = $numrows;$this->affected = 0;return $result;} else {$this->affected = 0;return DB_OK;}}// }}}// {{{ nextResult()/*** Move the internal pgsql result pointer to the next available result** @param a valid fbsql result resource** @access public** @return true if a result is available otherwise return false*/function nextResult($result){return false;}// }}}// {{{ fetchInto()/*** Places a row from the result set into the given array** Formating of the array and the data therein are configurable.* See DB_result::fetchInto() for more information.** This method is not meant to be called directly. Use* DB_result::fetchInto() instead. It can't be declared "protected"* because DB_result is a separate object.** @param resource $result the query result resource* @param array $arr the referenced array to put the data in* @param int $fetchmode how the resulting array should be indexed* @param int $rownum the row number to fetch (0 = first row)** @return mixed DB_OK on success, NULL when the end of a result set is* reached or on failure** @see DB_result::fetchInto()*/function fetchInto($result, &$arr, $fetchmode, $rownum = null){$result_int = (int)$result;$rownum = ($rownum !== null) ? $rownum : $this->row[$result_int];if ($rownum >= $this->_num_rows[$result_int]) {return null;}if ($fetchmode & DB_FETCHMODE_ASSOC) {$arr = @pg_fetch_array($result, $rownum, PGSQL_ASSOC);if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) {$arr = array_change_key_case($arr, CASE_LOWER);}} else {$arr = @pg_fetch_row($result, $rownum);}if (!$arr) {return null;}if ($this->options['portability'] & DB_PORTABILITY_RTRIM) {$this->_rtrimArrayValues($arr);}if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) {$this->_convertNullArrayValuesToEmpty($arr);}$this->row[$result_int] = ++$rownum;return DB_OK;}// }}}// {{{ freeResult()/*** Deletes the result set and frees the memory occupied by the result set** This method is not meant to be called directly. Use* DB_result::free() instead. It can't be declared "protected"* because DB_result is a separate object.** @param resource $result PHP's query result resource** @return bool TRUE on success, FALSE if $result is invalid** @see DB_result::free()*/function freeResult($result){if (is_resource($result)) {unset($this->row[(int)$result]);unset($this->_num_rows[(int)$result]);$this->affected = 0;return @pg_freeresult($result);}return false;}// }}}// {{{ quote()/*** @deprecated Deprecated in release 1.6.0* @internal*/function quote($str){return $this->quoteSmart($str);}// }}}// {{{ quoteSmart()/*** Formats input so it can be safely used in a query** @param mixed $in the data to be formatted** @return mixed the formatted data. The format depends on the input's* PHP type:* + null = the string <samp>NULL</samp>* + boolean = string <samp>TRUE</samp> or <samp>FALSE</samp>* + integer or double = the unquoted number* + other (including strings and numeric strings) =* the data escaped according to MySQL's settings* then encapsulated between single quotes** @see DB_common::quoteSmart()* @since Method available since Release 1.6.0*/function quoteSmart($in){if (is_int($in) || is_double($in)) {return $in;} elseif (is_bool($in)) {return $in ? 'TRUE' : 'FALSE';} elseif (is_null($in)) {return 'NULL';} else {return "'" . $this->escapeSimple($in) . "'";}}// }}}// {{{ escapeSimple()/*** Escapes a string according to the current DBMS's standards** {@internal PostgreSQL treats a backslash as an escape character,* so they are escaped as well.** Not using pg_escape_string() yet because it requires PostgreSQL* to be at version 7.2 or greater.}}** @param string $str the string to be escaped** @return string the escaped string** @see DB_common::quoteSmart()* @since Method available since Release 1.6.0*/function escapeSimple($str){return str_replace("'", "''", str_replace('\\', '\\\\', $str));}// }}}// {{{ numCols()/*** Gets the number of columns in a result set** This method is not meant to be called directly. Use* DB_result::numCols() instead. It can't be declared "protected"* because DB_result is a separate object.** @param resource $result PHP's query result resource** @return int the number of columns. A DB_Error object on failure.** @see DB_result::numCols()*/function numCols($result){$cols = @pg_numfields($result);if (!$cols) {return $this->pgsqlRaiseError();}return $cols;}// }}}// {{{ numRows()/*** Gets the number of rows in a result set** This method is not meant to be called directly. Use* DB_result::numRows() instead. It can't be declared "protected"* because DB_result is a separate object.** @param resource $result PHP's query result resource** @return int the number of rows. A DB_Error object on failure.** @see DB_result::numRows()*/function numRows($result){$rows = @pg_numrows($result);if ($rows === null) {return $this->pgsqlRaiseError();}return $rows;}// }}}// {{{ autoCommit()/*** Enables or disables automatic commits** @param bool $onoff true turns it on, false turns it off** @return int DB_OK on success. A DB_Error object if the driver* doesn't support auto-committing transactions.*/function autoCommit($onoff = false){// XXX if $this->transaction_opcount > 0, we should probably// issue a warning here.$this->autocommit = $onoff ? true : false;return DB_OK;}// }}}// {{{ commit()/*** Commits the current transaction** @return int DB_OK on success. A DB_Error object on failure.*/function commit(){if ($this->transaction_opcount > 0) {// (disabled) hack to shut up error messages from libpq.a//@fclose(@fopen("php://stderr", "w"));$result = @pg_exec($this->connection, 'end;');$this->transaction_opcount = 0;if (!$result) {return $this->pgsqlRaiseError();}}return DB_OK;}// }}}// {{{ rollback()/*** Reverts the current transaction** @return int DB_OK on success. A DB_Error object on failure.*/function rollback(){if ($this->transaction_opcount > 0) {$result = @pg_exec($this->connection, 'abort;');$this->transaction_opcount = 0;if (!$result) {return $this->pgsqlRaiseError();}}return DB_OK;}// }}}// {{{ affectedRows()/*** Determines the number of rows affected by a data maniuplation query** 0 is returned for queries that don't manipulate data.** @return int the number of rows. A DB_Error object on failure.*/function affectedRows(){return $this->affected;}// }}}// {{{ nextId()/*** Returns the next free id in a sequence** @param string $seq_name name of the sequence* @param boolean $ondemand when true, the seqence is automatically* created if it does not exist** @return int the next id number in the sequence.* A DB_Error object on failure.** @see DB_common::nextID(), DB_common::getSequenceName(),* DB_pgsql::createSequence(), DB_pgsql::dropSequence()*/function nextId($seq_name, $ondemand = true){$seqname = $this->getSequenceName($seq_name);$repeat = false;do {$this->pushErrorHandling(PEAR_ERROR_RETURN);$result =& $this->query("SELECT NEXTVAL('${seqname}')");$this->popErrorHandling();if ($ondemand && DB::isError($result) &&$result->getCode() == DB_ERROR_NOSUCHTABLE) {$repeat = true;$this->pushErrorHandling(PEAR_ERROR_RETURN);$result = $this->createSequence($seq_name);$this->popErrorHandling();if (DB::isError($result)) {return $this->raiseError($result);}} else {$repeat = false;}} while ($repeat);if (DB::isError($result)) {return $this->raiseError($result);}$arr = $result->fetchRow(DB_FETCHMODE_ORDERED);$result->free();return $arr[0];}// }}}// {{{ createSequence()/*** Creates a new sequence** @param string $seq_name name of the new sequence** @return int DB_OK on success. A DB_Error object on failure.** @see DB_common::createSequence(), DB_common::getSequenceName(),* DB_pgsql::nextID(), DB_pgsql::dropSequence()*/function createSequence($seq_name){$seqname = $this->getSequenceName($seq_name);$result = $this->query("CREATE SEQUENCE ${seqname}");return $result;}// }}}// {{{ dropSequence()/*** Deletes a sequence** @param string $seq_name name of the sequence to be deleted** @return int DB_OK on success. A DB_Error object on failure.** @see DB_common::dropSequence(), DB_common::getSequenceName(),* DB_pgsql::nextID(), DB_pgsql::createSequence()*/function dropSequence($seq_name){return $this->query('DROP SEQUENCE '. $this->getSequenceName($seq_name));}// }}}// {{{ modifyLimitQuery()/*** Adds LIMIT clauses to a query string according to current DBMS standards** @param string $query the query to modify* @param int $from the row to start to fetching (0 = the first row)* @param int $count the numbers of rows to fetch* @param mixed $params array, string or numeric data to be used in* execution of the statement. Quantity of items* passed must match quantity of placeholders in* query: meaning 1 placeholder for non-array* parameters or 1 placeholder per array element.** @return string the query string with LIMIT clauses added** @access protected*/function modifyLimitQuery($query, $from, $count, $params = array()){return "$query LIMIT $count OFFSET $from";}// }}}// {{{ pgsqlRaiseError()/*** Produces a DB_Error object regarding the current problem** @param int $errno if the error is being manually raised pass a* DB_ERROR* constant here. If this isn't passed* the error information gathered from the DBMS.** @return object the DB_Error object** @see DB_common::raiseError(),* DB_pgsql::errorNative(), DB_pgsql::errorCode()*/function pgsqlRaiseError($errno = null){$native = $this->errorNative();if ($errno === null) {$errno = $this->errorCode($native);}return $this->raiseError($errno, null, null, null, $native);}// }}}// {{{ errorNative()/*** Gets the DBMS' native error message produced by the last query** {@internal Error messages are used instead of error codes* in order to support older versions of PostgreSQL.}}** @return string the DBMS' error message*/function errorNative(){return @pg_errormessage($this->connection);}// }}}// {{{ errorCode()/*** Determines PEAR::DB error code from the database's text error message.** @param string $errormsg error message returned from the database* @return integer an error number from a DB error constant*/function errorCode($errormsg){static $error_regexps;if (!isset($error_regexps)) {$error_regexps = array('/(relation|sequence|table).*does not exist|class .* not found/i'=> DB_ERROR_NOSUCHTABLE,'/index .* does not exist/'=> DB_ERROR_NOT_FOUND,'/column .* does not exist/i'=> DB_ERROR_NOSUCHFIELD,'/relation .* already exists/i'=> DB_ERROR_ALREADY_EXISTS,'/(divide|division) by zero$/i'=> DB_ERROR_DIVZERO,'/pg_atoi: error in .*: can\'t parse /i'=> DB_ERROR_INVALID_NUMBER,'/invalid input syntax for( type)? (integer|numeric)/i'=> DB_ERROR_INVALID_NUMBER,'/value .* is out of range for type \w*int/i'=> DB_ERROR_INVALID_NUMBER,'/integer out of range/i'=> DB_ERROR_INVALID_NUMBER,'/value too long for type character/i'=> DB_ERROR_INVALID,'/attribute .* not found|relation .* does not have attribute/i'=> DB_ERROR_NOSUCHFIELD,'/column .* specified in USING clause does not exist in (left|right) table/i'=> DB_ERROR_NOSUCHFIELD,'/parser: parse error at or near/i'=> DB_ERROR_SYNTAX,'/syntax error at/'=> DB_ERROR_SYNTAX,'/column reference .* is ambiguous/i'=> DB_ERROR_SYNTAX,'/permission denied/'=> DB_ERROR_ACCESS_VIOLATION,'/violates not-null constraint/'=> DB_ERROR_CONSTRAINT_NOT_NULL,'/violates [\w ]+ constraint/'=> DB_ERROR_CONSTRAINT,'/referential integrity violation/'=> DB_ERROR_CONSTRAINT,'/more expressions than target columns/i'=> DB_ERROR_VALUE_COUNT_ON_ROW,);}foreach ($error_regexps as $regexp => $code) {if (preg_match($regexp, $errormsg)) {return $code;}}// Fall back to DB_ERROR if there was no mapping.return DB_ERROR;}// }}}// {{{ tableInfo()/*** Returns information about a table or a result set** NOTE: only supports 'table' and 'flags' if <var>$result</var>* is a table name.** @param object|string $result DB_result object from a query or a* string containing the name of a table.* While this also accepts a query result* resource identifier, this behavior is* deprecated.* @param int $mode a valid tableInfo mode** @return array an associative array with the information requested.* A DB_Error object on failure.** @see DB_common::tableInfo()*/function tableInfo($result, $mode = null){if (is_string($result)) {/** Probably received a table name.* Create a result resource identifier.*/$id = @pg_exec($this->connection, "SELECT * FROM $result LIMIT 0");$got_string = true;} elseif (isset($result->result)) {/** Probably received a result object.* Extract the result resource identifier.*/$id = $result->result;$got_string = false;} else {/** Probably received a result resource identifier.* Copy it.* Deprecated. Here for compatibility only.*/$id = $result;$got_string = false;}if (!is_resource($id)) {return $this->pgsqlRaiseError(DB_ERROR_NEED_MORE_DATA);}if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {$case_func = 'strtolower';} else {$case_func = 'strval';}$count = @pg_numfields($id);$res = array();if ($mode) {$res['num_fields'] = $count;}for ($i = 0; $i < $count; $i++) {$res[$i] = array('table' => $got_string ? $case_func($result) : '','name' => $case_func(@pg_fieldname($id, $i)),'type' => @pg_fieldtype($id, $i),'len' => @pg_fieldsize($id, $i),'flags' => $got_string? $this->_pgFieldFlags($id, $i, $result): '',);if ($mode & DB_TABLEINFO_ORDER) {$res['order'][$res[$i]['name']] = $i;}if ($mode & DB_TABLEINFO_ORDERTABLE) {$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;}}// free the result only if we were called on a tableif ($got_string) {@pg_freeresult($id);}return $res;}// }}}// {{{ _pgFieldFlags()/*** Get a column's flags** Supports "not_null", "default_value", "primary_key", "unique_key"* and "multiple_key". The default value is passed through* rawurlencode() in case there are spaces in it.** @param int $resource the PostgreSQL result identifier* @param int $num_field the field number** @return string the flags** @access private*/function _pgFieldFlags($resource, $num_field, $table_name){$field_name = @pg_fieldname($resource, $num_field);$result = @pg_exec($this->connection, "SELECT f.attnotnull, f.atthasdefFROM pg_attribute f, pg_class tab, pg_type typWHERE tab.relname = typ.typnameAND typ.typrelid = f.attrelidAND f.attname = '$field_name'AND tab.relname = '$table_name'");if (@pg_numrows($result) > 0) {$row = @pg_fetch_row($result, 0);$flags = ($row[0] == 't') ? 'not_null ' : '';if ($row[1] == 't') {$result = @pg_exec($this->connection, "SELECT a.adsrcFROM pg_attribute f, pg_class tab, pg_type typ, pg_attrdef aWHERE tab.relname = typ.typname AND typ.typrelid = f.attrelidAND f.attrelid = a.adrelid AND f.attname = '$field_name'AND tab.relname = '$table_name' AND f.attnum = a.adnum");$row = @pg_fetch_row($result, 0);$num = preg_replace("/'(.*)'::\w+/", "\\1", $row[0]);$flags .= 'default_' . rawurlencode($num) . ' ';}} else {$flags = '';}$result = @pg_exec($this->connection, "SELECT i.indisunique, i.indisprimary, i.indkeyFROM pg_attribute f, pg_class tab, pg_type typ, pg_index iWHERE tab.relname = typ.typnameAND typ.typrelid = f.attrelidAND f.attrelid = i.indrelidAND f.attname = '$field_name'AND tab.relname = '$table_name'");$count = @pg_numrows($result);for ($i = 0; $i < $count ; $i++) {$row = @pg_fetch_row($result, $i);$keys = explode(' ', $row[2]);if (in_array($num_field + 1, $keys)) {$flags .= ($row[0] == 't' && $row[1] == 'f') ? 'unique_key ' : '';$flags .= ($row[1] == 't') ? 'primary_key ' : '';if (count($keys) > 1)$flags .= 'multiple_key ';}}return trim($flags);}// }}}// {{{ getSpecialQuery()/*** Obtains the query string needed for listing a given type of objects** @param string $type the kind of objects you want to retrieve** @return string the SQL query string or null if the driver doesn't* support the object type requested** @access protected* @see DB_common::getListOf()*/function getSpecialQuery($type){switch ($type) {case 'tables':return 'SELECT c.relname AS "Name"'. ' FROM pg_class c, pg_user u'. ' WHERE c.relowner = u.usesysid'. " AND c.relkind = 'r'". ' AND NOT EXISTS'. ' (SELECT 1 FROM pg_views'. ' WHERE viewname = c.relname)'. " AND c.relname !~ '^(pg_|sql_)'". ' UNION'. ' SELECT c.relname AS "Name"'. ' FROM pg_class c'. " WHERE c.relkind = 'r'". ' AND NOT EXISTS'. ' (SELECT 1 FROM pg_views'. ' WHERE viewname = c.relname)'. ' AND NOT EXISTS'. ' (SELECT 1 FROM pg_user'. ' WHERE usesysid = c.relowner)'. " AND c.relname !~ '^pg_'";case 'schema.tables':return "SELECT schemaname || '.' || tablename". ' AS "Name"'. ' FROM pg_catalog.pg_tables'. ' WHERE schemaname NOT IN'. " ('pg_catalog', 'information_schema', 'pg_toast')";case 'views':// Table cols: viewname | viewowner | definitionreturn 'SELECT viewname from pg_views WHERE schemaname'. " NOT IN ('information_schema', 'pg_catalog')";case 'users':// cols: usename |usesysid|usecreatedb|usetrace|usesuper|usecatupd|passwd |valuntilreturn 'SELECT usename FROM pg_user';case 'databases':return 'SELECT datname FROM pg_database';case 'functions':case 'procedures':return 'SELECT proname FROM pg_proc WHERE proowner <> 1';default:return null;}}// }}}}/** Local variables:* tab-width: 4* c-basic-offset: 4* End:*/?>