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+<?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 1997-2007 The PHP Group
+ * @license http://www.php.net/license/3_0.txt PHP License 3.0
+ * @version CVS: $Id: pgsql.php,v 1.139 2007/11/28 02:19:44 aharvey 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 1997-2007 The PHP Group
+ * @license http://www.php.net/license/3_0.txt PHP License 3.0
+ * @version Release: 1.7.14RC1
+ * @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 = $this->_checkManip($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 $this->pgsqlRaiseError();
+ }
+
+ /*
+ * Determine whether queries produce affected rows, result or nothing.
+ *
+ * This logic was introduced in version 1.1 of the file by ssb,
+ * though the regex has been modified slightly since then.
+ *
+ * PostgreSQL commands:
+ * ABORT, ALTER, BEGIN, CLOSE, CLUSTER, COMMIT, COPY,
+ * CREATE, DECLARE, DELETE, DROP TABLE, EXPLAIN, FETCH,
+ * GRANT, INSERT, LISTEN, LOAD, LOCK, MOVE, NOTIFY, RESET,
+ * REVOKE, ROLLBACK, SELECT, SELECT INTO, SET, SHOW,
+ * UNLISTEN, UPDATE, VACUUM
+ */
+ if ($ismanip) {
+ $this->affected = @pg_affected_rows($result);
+ return DB_OK;
+ } elseif (preg_match('/^\s*\(*\s*(SELECT|EXPLAIN|FETCH|SHOW)\s/si',
+ $query))
+ {
+ $this->row[(int)$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);
+ }
+
+ // }}}
+ // {{{ quoteBoolean()
+
+ /**
+ * Formats a boolean value for use within a query in a locale-independent
+ * manner.
+ *
+ * @param boolean the boolean value to be quoted.
+ * @return string the quoted string.
+ * @see DB_common::quoteSmart()
+ * @since Method available since release 1.7.8.
+ */
+ function quoteBoolean($boolean) {
+ return $boolean ? 'TRUE' : 'FALSE';
+ }
+
+ // }}}
+ // {{{ 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.
+ *
+ * @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)
+ {
+ if (function_exists('pg_escape_string')) {
+ /* This fixes an undocumented BC break in PHP 5.2.0 which changed
+ * the prototype of pg_escape_string. I'm not thrilled about having
+ * to sniff the PHP version, quite frankly, but it's the only way
+ * to deal with the problem. Revision 1.331.2.13.2.10 on
+ * php-src/ext/pgsql/pgsql.c (PHP_5_2 branch) is to blame, for the
+ * record. */
+ if (version_compare(PHP_VERSION, '5.2.0', '>=')) {
+ return pg_escape_string($this->connection, $str);
+ } else {
+ return pg_escape_string($str);
+ }
+ } else {
+ 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 = $this->errorNative();
+ if (!$native) {
+ $native = 'Database connection has been lost.';
+ $errno = DB_ERROR_CONNECT_FAILED;
+ }
+ if ($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)) {
+ $error_regexps = array(
+ '/column .* (of relation .*)?does not exist/i'
+ => DB_ERROR_NOSUCHFIELD,
+ '/(relation|sequence|table).*does not exist|class .* not found/i'
+ => DB_ERROR_NOSUCHTABLE,
+ '/index .* does not exist/'
+ => DB_ERROR_NOT_FOUND,
+ '/relation .* already exists/i'
+ => DB_ERROR_ALREADY_EXISTS,
+ '/(divide|division) by zero$/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']] = $i;
+ }
+ }
+
+ // free the result only if we were called on a table
+ if ($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);
+
+ // Check if there's a schema in $table_name and update things
+ // accordingly.
+ $from = 'pg_attribute f, pg_class tab, pg_type typ';
+ if (strpos($table_name, '.') !== false) {
+ $from .= ', pg_namespace nsp';
+ list($schema, $table) = explode('.', $table_name);
+ $tableWhere = "tab.relname = '$table' AND tab.relnamespace = nsp.oid AND nsp.nspname = '$schema'";
+ } else {
+ $tableWhere = "tab.relname = '$table_name'";
+ }
+
+ $result = @pg_exec($this->connection, "SELECT f.attnotnull, f.atthasdef
+ FROM $from
+ WHERE tab.relname = typ.typname
+ AND typ.typrelid = f.attrelid
+ AND f.attname = '$field_name'
+ AND $tableWhere");
+ if (@pg_numrows($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.adsrc
+ FROM $from, pg_attrdef a
+ WHERE tab.relname = typ.typname AND typ.typrelid = f.attrelid
+ AND f.attrelid = a.adrelid AND f.attname = '$field_name'
+ AND $tableWhere 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.indkey
+ FROM $from, pg_index i
+ WHERE tab.relname = typ.typname
+ AND typ.typrelid = f.attrelid
+ AND f.attrelid = i.indrelid
+ AND f.attname = '$field_name'
+ AND $tableWhere");
+ $count = @pg_numrows($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 ($type) {
+ case 'tables':
+ return 'SELECT c.relname AS "Name"'
+ . ' FROM pg_class c, pg_user u'
+ . ' WHERE c.relowner = u.usesysid'
+ . " AND c.relkind = 'r'"
+ . ' AND NOT EXISTS'
+ . ' (SELECT 1 FROM pg_views'
+ . ' WHERE viewname = c.relname)'
+ . " AND c.relname !~ '^(pg_|sql_)'"
+ . ' UNION'
+ . ' SELECT c.relname AS "Name"'
+ . ' FROM pg_class c'
+ . " WHERE c.relkind = 'r'"
+ . ' AND NOT EXISTS'
+ . ' (SELECT 1 FROM pg_views'
+ . ' WHERE viewname = c.relname)'
+ . ' AND NOT EXISTS'
+ . ' (SELECT 1 FROM pg_user'
+ . ' WHERE usesysid = c.relowner)'
+ . " AND c.relname !~ '^pg_'";
+ case 'schema.tables':
+ return "SELECT schemaname || '.' || tablename"
+ . ' AS "Name"'
+ . ' FROM pg_catalog.pg_tables'
+ . ' WHERE schemaname NOT IN'
+ . " ('pg_catalog', 'information_schema', 'pg_toast')";
+ case 'schema.views':
+ return "SELECT schemaname || '.' || viewname from pg_views WHERE schemaname"
+ . " NOT IN ('information_schema', 'pg_catalog')";
+ case 'views':
+ // Table cols: viewname | viewowner | definition
+ return 'SELECT viewname from pg_views WHERE schemaname'
+ . " NOT IN ('information_schema', 'pg_catalog')";
+ case 'users':
+ // cols: usename |usesysid|usecreatedb|usetrace|usesuper|usecatupd|passwd |valuntil
+ return 'SELECT usename FROM pg_user';
+ case 'databases':
+ return 'SELECT datname FROM pg_database';
+ case 'functions':
+ case 'procedures':
+ return 'SELECT proname FROM pg_proc WHERE proowner <> 1';
+ default:
+ return null;
+ }
+ }
+
+ // }}}
+ // {{{ _checkManip()
+
+ /**
+ * Checks if the given query is a manipulation query. This also takes into
+ * account the _next_query_manip flag and sets the _last_query_manip flag
+ * (and resets _next_query_manip) according to the result.
+ *
+ * @param string The query to check.
+ *
+ * @return boolean true if the query is a manipulation query, false
+ * otherwise
+ *
+ * @access protected
+ */
+ function _checkManip($query)
+ {
+ return (preg_match('/^\s*(SAVEPOINT|RELEASE)\s+/i', $query)
+ || parent::_checkManip($query));
+ }
+
+}
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ */
+
+?>
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-23 05:00:51 +0000