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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: $Id$
- * @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: 1.7.13
- * @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;
- }
- }
-
- // }}}
-
-}
-
-/*
- * Local variables:
- * tab-width: 4
- * c-basic-offset: 4
- * End:
- */
-
-?>
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-03 12:39:47 +0000