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-<?php
-
-/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
-
-/**
- * The PEAR DB driver for PHP's ifx extension
- * for interacting with Informix 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 Tomas V.V.Cox <cox@idecnet.com>
- * @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 ifx extension
- * for interacting with Informix databases
- *
- * These methods overload the ones declared in DB_common.
- *
- * More info on Informix errors can be found at:
- * http://www.informix.com/answers/english/ierrors.htm
- *
- * TODO:
- * - set needed env Informix vars on connect
- * - implement native prepare/execute
- *
- * @category Database
- * @package DB
- * @author Tomas V.V.Cox <cox@idecnet.com>
- * @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_ifx extends DB_common
-{
- // {{{ properties
-
- /**
- * The DB driver type (mysql, oci8, odbc, etc.)
- * @var string
- */
- var $phptype = 'ifx';
-
- /**
- * The database syntax variant to be used (db2, access, etc.), if any
- * @var string
- */
- var $dbsyntax = 'ifx';
-
- /**
- * 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' => 'emulate',
- 'new_link' => false,
- 'numrows' => 'emulate',
- 'pconnect' => true,
- 'prepare' => false,
- 'ssl' => false,
- 'transactions' => true,
- );
-
- /**
- * A mapping of native error codes to DB error codes
- * @var array
- */
- var $errorcode_map = array(
- '-201' => DB_ERROR_SYNTAX,
- '-206' => DB_ERROR_NOSUCHTABLE,
- '-217' => DB_ERROR_NOSUCHFIELD,
- '-236' => DB_ERROR_VALUE_COUNT_ON_ROW,
- '-239' => DB_ERROR_CONSTRAINT,
- '-253' => DB_ERROR_SYNTAX,
- '-268' => DB_ERROR_CONSTRAINT,
- '-292' => DB_ERROR_CONSTRAINT_NOT_NULL,
- '-310' => DB_ERROR_ALREADY_EXISTS,
- '-316' => DB_ERROR_ALREADY_EXISTS,
- '-319' => DB_ERROR_NOT_FOUND,
- '-329' => DB_ERROR_NODBSELECTED,
- '-346' => DB_ERROR_CONSTRAINT,
- '-386' => DB_ERROR_CONSTRAINT_NOT_NULL,
- '-391' => DB_ERROR_CONSTRAINT_NOT_NULL,
- '-554' => DB_ERROR_SYNTAX,
- '-691' => DB_ERROR_CONSTRAINT,
- '-692' => DB_ERROR_CONSTRAINT,
- '-703' => DB_ERROR_CONSTRAINT_NOT_NULL,
- '-1202' => DB_ERROR_DIVZERO,
- '-1204' => DB_ERROR_INVALID_DATE,
- '-1205' => DB_ERROR_INVALID_DATE,
- '-1206' => DB_ERROR_INVALID_DATE,
- '-1209' => DB_ERROR_INVALID_DATE,
- '-1210' => DB_ERROR_INVALID_DATE,
- '-1212' => DB_ERROR_INVALID_DATE,
- '-1213' => DB_ERROR_INVALID_NUMBER,
- );
-
- /**
- * 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
- * @access private
- */
- var $affected = 0;
-
-
- // }}}
- // {{{ constructor
-
- /**
- * This constructor calls <kbd>$this->DB_common()</kbd>
- *
- * @return void
- */
- function DB_ifx()
- {
- $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.
- *
- * @param array $dsn the data source name
- * @param bool $persistent should the connection be persistent?
- *
- * @return int DB_OK on success. A DB_Error object on failure.
- */
- function connect($dsn, $persistent = false)
- {
- if (!PEAR::loadExtension('informix') &&
- !PEAR::loadExtension('Informix'))
- {
- return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
- }
-
- $this->dsn = $dsn;
- if ($dsn['dbsyntax']) {
- $this->dbsyntax = $dsn['dbsyntax'];
- }
-
- $dbhost = $dsn['hostspec'] ? '@' . $dsn['hostspec'] : '';
- $dbname = $dsn['database'] ? $dsn['database'] . $dbhost : '';
- $user = $dsn['username'] ? $dsn['username'] : '';
- $pw = $dsn['password'] ? $dsn['password'] : '';
-
- $connect_function = $persistent ? 'ifx_pconnect' : 'ifx_connect';
-
- $this->connection = @$connect_function($dbname, $user, $pw);
- if (!is_resource($this->connection)) {
- return $this->ifxRaiseError(DB_ERROR_CONNECT_FAILED);
- }
- return DB_OK;
- }
-
- // }}}
- // {{{ disconnect()
-
- /**
- * Disconnects from the database server
- *
- * @return bool TRUE on success, FALSE on failure
- */
- function disconnect()
- {
- $ret = @ifx_close($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;
- $this->affected = null;
- if (preg_match('/(SELECT|EXECUTE)/i', $query)) { //TESTME: Use !DB::isManip()?
- // the scroll is needed for fetching absolute row numbers
- // in a select query result
- $result = @ifx_query($query, $this->connection, IFX_SCROLL);
- } else {
- if (!$this->autocommit && $ismanip) {
- if ($this->transaction_opcount == 0) {
- $result = @ifx_query('BEGIN WORK', $this->connection);
- if (!$result) {
- return $this->ifxRaiseError();
- }
- }
- $this->transaction_opcount++;
- }
- $result = @ifx_query($query, $this->connection);
- }
- if (!$result) {
- return $this->ifxRaiseError();
- }
- $this->affected = @ifx_affected_rows($result);
- // Determine which queries should return data, and which
- // should return an error code only.
- if (preg_match('/(SELECT|EXECUTE)/i', $query)) {
- return $result;
- }
- // XXX Testme: free results inside a transaction
- // may cause to stop it and commit the work?
-
- // Result has to be freed even with a insert or update
- @ifx_free_result($result);
-
- return DB_OK;
- }
-
- // }}}
- // {{{ nextResult()
-
- /**
- * Move the internal ifx 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($result)
- {
- return false;
- }
-
- // }}}
- // {{{ affectedRows()
-
- /**
- * Determines the number of rows affected by a data maniuplation query
- *
- * 0 is returned for queries that don't manipulate data.
- *
- * @return int the number of rows. A DB_Error object on failure.
- */
- function affectedRows()
- {
- if ($this->_last_query_manip) {
- return $this->affected;
- } else {
- return 0;
- }
- }
-
- // }}}
- // {{{ 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, $rownum = null)
- {
- if (($rownum !== null) && ($rownum < 0)) {
- return null;
- }
- if ($rownum === null) {
- /*
- * Even though fetch_row() should return the next row if
- * $rownum is null, it doesn't in all cases. Bug 598.
- */
- $rownum = 'NEXT';
- } else {
- // Index starts at row 1, unlike most DBMS's starting at 0.
- $rownum++;
- }
- if (!$arr = @ifx_fetch_row($result, $rownum)) {
- return null;
- }
- if ($fetchmode !== DB_FETCHMODE_ASSOC) {
- $i=0;
- $order = array();
- foreach ($arr as $val) {
- $order[$i++] = $val;
- }
- $arr = $order;
- } elseif ($fetchmode == DB_FETCHMODE_ASSOC &&
- $this->options['portability'] & DB_PORTABILITY_LOWERCASE)
- {
- $arr = array_change_key_case($arr, CASE_LOWER);
- }
- if ($this->options['portability'] & DB_PORTABILITY_RTRIM) {
- $this->_rtrimArrayValues($arr);
- }
- if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) {
- $this->_convertNullArrayValuesToEmpty($arr);
- }
- return DB_OK;
- }
-
- // }}}
- // {{{ 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)
- {
- if (!$cols = @ifx_num_fields($result)) {
- return $this->ifxRaiseError();
- }
- return $cols;
- }
-
- // }}}
- // {{{ 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)
- {
- return is_resource($result) ? ifx_free_result($result) : false;
- }
-
- // }}}
- // {{{ 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 = true)
- {
- // 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) {
- $result = @ifx_query('COMMIT WORK', $this->connection);
- $this->transaction_opcount = 0;
- if (!$result) {
- return $this->ifxRaiseError();
- }
- }
- return DB_OK;
- }
-
- // }}}
- // {{{ rollback()
-
- /**
- * Reverts the current transaction
- *
- * @return int DB_OK on success. A DB_Error object on failure.
- */
- function rollback()
- {
- if ($this->transaction_opcount > 0) {
- $result = @ifx_query('ROLLBACK WORK', $this->connection);
- $this->transaction_opcount = 0;
- if (!$result) {
- return $this->ifxRaiseError();
- }
- }
- return DB_OK;
- }
-
- // }}}
- // {{{ ifxRaiseError()
-
- /**
- * Produces a DB_Error object regarding the current problem
- *
- * @param int $errno if the error is being manually raised pass a
- * DB_ERROR* constant here. If this isn't passed
- * the error information gathered from the DBMS.
- *
- * @return object the DB_Error object
- *
- * @see DB_common::raiseError(),
- * DB_ifx::errorNative(), DB_ifx::errorCode()
- */
- function ifxRaiseError($errno = null)
- {
- if ($errno === null) {
- $errno = $this->errorCode(ifx_error());
- }
- return $this->raiseError($errno, null, null, null,
- $this->errorNative());
- }
-
- // }}}
- // {{{ errorNative()
-
- /**
- * Gets the DBMS' native error code and message produced by the last query
- *
- * @return string the DBMS' error code and message
- */
- function errorNative()
- {
- return @ifx_error() . ' ' . @ifx_errormsg();
- }
-
- // }}}
- // {{{ errorCode()
-
- /**
- * Maps native error codes to DB's portable ones.
- *
- * Requires that the DB implementation's constructor fills
- * in the <var>$errorcode_map</var> property.
- *
- * @param string $nativecode error code returned by the database
- * @return int a portable DB error code, or DB_ERROR if this DB
- * implementation has no mapping for the given error code.
- */
- function errorCode($nativecode)
- {
- if (ereg('SQLCODE=(.*)]', $nativecode, $match)) {
- $code = $match[1];
- if (isset($this->errorcode_map[$code])) {
- return $this->errorcode_map[$code];
- }
- }
- return DB_ERROR;
- }
-
- // }}}
- // {{{ tableInfo()
-
- /**
- * Returns information about a table or a result set
- *
- * NOTE: only supports 'table' if <var>$result</var> is a table name.
- *
- * If analyzing a query result and the result has duplicate field names,
- * an error will be raised saying
- * <samp>can't distinguish duplicate field names</samp>.
- *
- * @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 $mode a valid tableInfo mode
- *
- * @return array an associative array with the information requested.
- * A DB_Error object on failure.
- *
- * @see DB_common::tableInfo()
- * @since Method available since Release 1.6.0
- */
- function tableInfo($result, $mode = null)
- {
- if (is_string($result)) {
- /*
- * Probably received a table name.
- * Create a result resource identifier.
- */
- $id = @ifx_query("SELECT * FROM $result WHERE 1=0",
- $this->connection);
- $got_string = true;
- } elseif (isset($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.
- */
- $id = $result;
- $got_string = false;
- }
-
- if (!is_resource($id)) {
- return $this->ifxRaiseError(DB_ERROR_NEED_MORE_DATA);
- }
-
- $flds = @ifx_fieldproperties($id);
- $count = @ifx_num_fields($id);
-
- if (count($flds) != $count) {
- return $this->raiseError("can't distinguish duplicate field names");
- }
-
- if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
- $case_func = 'strtolower';
- } else {
- $case_func = 'strval';
- }
-
- $i = 0;
- $res = array();
-
- if ($mode) {
- $res['num_fields'] = $count;
- }
-
- foreach ($flds as $key => $value) {
- $props = explode(';', $value);
- $res[$i] = array(
- 'table' => $got_string ? $case_func($result) : '',
- 'name' => $case_func($key),
- 'type' => $props[0],
- 'len' => $props[1],
- 'flags' => $props[4] == 'N' ? 'not_null' : '',
- );
- if ($mode & DB_TABLEINFO_ORDER) {
- $res['order'][$res[$i]['name']] = $i;
- }
- if ($mode & DB_TABLEINFO_ORDERTABLE) {
- $res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
- }
- $i++;
- }
-
- // free the result only if we were called on a table
- if ($got_string) {
- @ifx_free_result($id);
- }
- return $res;
- }
-
- // }}}
- // {{{ 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 tabname FROM systables WHERE tabid >= 100';
- default:
- return null;
- }
- }
-
- // }}}
-
-}
-
-/*
- * Local variables:
- * tab-width: 4
- * c-basic-offset: 4
- * End:
- */
-
-?>
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