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- <?php
- /* vim: set expandtab tabstop=4 shiftwidth=4 foldmethod=marker: */
- // +----------------------------------------------------------------------+
- // | PHP Version 4 |
- // +----------------------------------------------------------------------+
- // | Copyright (c) 1997-2004 The PHP Group |
- // +----------------------------------------------------------------------+
- // | This source file is subject to version 2.02 of the PHP license, |
- // | that is bundled with this package in the file LICENSE, and is |
- // | available at through the world-wide-web at |
- // | http://www.php.net/license/2_02.txt. |
- // | If you did not receive a copy of the PHP license and are unable to |
- // | obtain it through the world-wide-web, please send a note to |
- // | license@php.net so we can mail you a copy immediately. |
- // +----------------------------------------------------------------------+
- // | Author: Tomas V.V.Cox <cox@idecnet.com> |
- // | Maintainer: Daniel Convissor <danielc@php.net> |
- // +----------------------------------------------------------------------+
- //
- // $Id: ifx.php,v 1.47 2004/03/05 01:46:53 danielc Exp $
-
-
- // Legend:
- // For more info on Informix errors see:
- // http://www.informix.com/answers/english/ierrors.htm
- //
- // TODO:
- // - set needed env Informix vars on connect
- // - implement native prepare/execute
-
-
- require_once 'DB/common.php';
-
- /**
- * Database independent query interface definition for PHP's Informix
- * extension.
- *
- * @package DB
- * @version $Id: ifx.php,v 1.47 2004/03/05 01:46:53 danielc Exp $
- * @category Database
- * @author Tomas V.V.Cox <cox@idecnet.com>
- */
- class DB_ifx extends DB_common
- {
- // {{{ properties
-
- var $connection;
- var $affected = 0;
- var $dsn = array();
- var $transaction_opcount = 0;
- var $autocommit = true;
- var $fetchmode = DB_FETCHMODE_ORDERED; /* Default fetch mode */
-
- // }}}
- // {{{ constructor
-
- function DB_ifx()
- {
- $this->phptype = 'ifx';
- $this->dbsyntax = 'ifx';
- $this->features = array(
- 'prepare' => false,
- 'pconnect' => true,
- 'transactions' => true,
- 'limit' => 'emulate'
- );
- $this->errorcode_map = array(
- '-201' => DB_ERROR_SYNTAX,
- '-206' => DB_ERROR_NOSUCHTABLE,
- '-217' => DB_ERROR_NOSUCHFIELD,
- '-239' => DB_ERROR_CONSTRAINT,
- '-253' => DB_ERROR_SYNTAX,
- '-292' => DB_ERROR_CONSTRAINT_NOT_NULL,
- '-310' => DB_ERROR_ALREADY_EXISTS,
- '-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,
- '-703' => DB_ERROR_CONSTRAINT_NOT_NULL,
- '-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,
- );
- }
-
- // }}}
- // {{{ connect()
-
- /**
- * Connect to a database and log in as the specified user.
- *
- * @param $dsn the data source name (see DB::parseDSN for syntax)
- * @param $persistent (optional) whether the connection should
- * be persistent
- *
- * @return int DB_OK on success, a DB error code on failure
- */
- function connect($dsninfo, $persistent = false)
- {
- if (!DB::assertExtension('informix') &&
- !DB::assertExtension('Informix'))
- {
- return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
- }
- $this->dsn = $dsninfo;
- $dbhost = $dsninfo['hostspec'] ? '@' . $dsninfo['hostspec'] : '';
- $dbname = $dsninfo['database'] ? $dsninfo['database'] . $dbhost : '';
- $user = $dsninfo['username'] ? $dsninfo['username'] : '';
- $pw = $dsninfo['password'] ? $dsninfo['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()
-
- /**
- * Log out and disconnect from the database.
- *
- * @return bool true on success, false if not connected.
- */
- function disconnect()
- {
- $ret = @ifx_close($this->connection);
- $this->connection = null;
- return $ret;
- }
-
- // }}}
- // {{{ simpleQuery()
-
- /**
- * Send a query to Informix and return the results as a
- * Informix resource identifier.
- *
- * @param $query the SQL query
- *
- * @return int returns a valid Informix result for successful SELECT
- * queries, DB_OK for other successful queries. A DB error code
- * is returned on failure.
- */
- function simpleQuery($query)
- {
- $ismanip = DB::isManip($query);
- $this->last_query = $query;
- $this->affected = null;
- if (preg_match('/(SELECT)/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)/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($result)
- {
- return false;
- }
-
- // }}}
- // {{{ affectedRows()
-
- /**
- * Gets the number of rows affected by the last query.
- * if the last query was a select, returns 0.
- *
- * @return number of rows affected by the last query
- */
- function affectedRows()
- {
- if (DB::isManip($this->last_query)) {
- return $this->affected;
- } else {
- return 0;
- }
-
- }
-
- // }}}
- // {{{ fetchInto()
-
- /**
- * Fetch a row and insert the data into an existing array.
- *
- * Formating of the array and the data therein are configurable.
- * See DB_result::fetchInto() for more information.
- *
- * @param resource $result query result identifier
- * @param array $arr (reference) array where data from the row
- * should be placed
- * @param int $fetchmode how the resulting array should be indexed
- * @param int $rownum the row number to fetch
- *
- * @return mixed DB_OK on success, null when end of result set is
- * reached or on failure
- *
- * @see DB_result::fetchInto()
- * @access private
- */
- function fetchInto($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;
- }
-
- // }}}
- // {{{ numRows()
-
- function numRows($result)
- {
- return $this->raiseError(DB_ERROR_NOT_CAPABLE);
- }
-
- // }}}
- // {{{ numCols()
-
- /**
- * Get the number of columns in a result set.
- *
- * @param $result Informix result identifier
- *
- * @return int the number of columns per row in $result
- */
- function numCols($result)
- {
- if (!$cols = @ifx_num_fields($result)) {
- return $this->ifxraiseError();
- }
- return $cols;
- }
-
- // }}}
- // {{{ freeResult()
-
- /**
- * Free the internal resources associated with $result.
- *
- * @param $result Informix result identifier
- *
- * @return bool true on success, false if $result is invalid
- */
- function freeResult($result)
- {
- return @ifx_free_result($result);
- }
-
- // }}}
- // {{{ autoCommit()
-
- /**
- * Enable/disable automatic commits
- */
- function autoCommit($onoff = true)
- {
- // XXX if $this->transaction_opcount > 0, we should probably
- // issue a warning here.
- $this->autocommit = $onoff ? true : false;
- return DB_OK;
- }
-
- // }}}
- // {{{ commit()
-
- /**
- * Commit the current transaction.
- */
- function commit()
- {
- if ($this->transaction_opcount > 0) {
- $result = @ifx_query('COMMIT WORK', $this->connection);
- $this->transaction_opcount = 0;
- if (!$result) {
- return $this->ifxRaiseError();
- }
- }
- return DB_OK;
- }
-
- // }}}
- // {{{ rollback()
-
- /**
- * Roll back (undo) the current transaction.
- */
- function rollback()
- {
- if ($this->transaction_opcount > 0) {
- $result = @ifx_query('ROLLBACK WORK', $this->connection);
- $this->transaction_opcount = 0;
- if (!$result) {
- return $this->ifxRaiseError();
- }
- }
- return DB_OK;
- }
-
- // }}}
- // {{{ ifxraiseError()
-
- /**
- * Gather information about an error, then use that info to create a
- * DB error object and finally return that object.
- *
- * @param integer $errno PEAR error number (usually a DB constant) if
- * manually raising an error
- * @return object DB error object
- * @see errorNative()
- * @see errorCode()
- * @see DB_common::raiseError()
- */
- function ifxraiseError($errno = null)
- {
- if ($errno === null) {
- $errno = $this->errorCode(ifx_error());
- }
-
- return $this->raiseError($errno, null, null, null,
- $this->errorNative());
- }
-
- // }}}
- // {{{ errorCode()
-
- /**
- * Map native error codes to DB's portable ones.
- *
- * Requires that the DB implementation's constructor fills
- * in the <var>$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;
- }
-
- // }}}
- // {{{ errorNative()
-
- /**
- * Get the native error message of the last error (if any) that
- * occured on the current connection.
- *
- * @return int native Informix error code
- */
- function errorNative()
- {
- return @ifx_error() . ' ' . @ifx_errormsg();
- }
-
- // }}}
- // {{{ getSpecialQuery()
-
- /**
- * Returns the query needed to get some backend info
- * @param string $type What kind of info you want to retrieve
- * @return string The SQL query string
- */
- function getSpecialQuery($type)
- {
- switch ($type) {
- case 'tables':
- return 'select tabname from systables where tabid >= 100';
- default:
- return null;
- }
- }
-
- // }}}
- // {{{ tableInfo()
-
- /**
- * Returns information about a table or a result set.
- *
- * NOTE: only supports 'table' if <var>$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
- * @param int $mode a valid tableInfo mode
- * @return array an associative array with the information requested
- * or an error object if something is wrong
- * @access public
- * @internal
- * @since 1.6.0
- * @see DB_common::tableInfo()
- */
- function tableInfo($result, $mode = null)
- {
- if (isset($result->result)) {
- /*
- * Probably received a result object.
- * Extract the result resource identifier.
- */
- $id = $result->result;
- $got_string = false;
- } elseif (is_string($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;
- } 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;
- // made this IF due to performance (one if is faster than $count if's)
- if (!$mode) {
- foreach ($flds as $key => $value) {
- $props = explode(';', $value);
-
- $res[$i]['table'] = $got_string ? $case_func($result) : '';
- $res[$i]['name'] = $case_func($key);
- $res[$i]['type'] = $props[0];
- $res[$i]['len'] = $props[1];
- $res[$i]['flags'] = $props[4] == 'N' ? 'not_null' : '';
- $i++;
- }
-
- } else { // full
- $res['num_fields'] = $count;
-
- foreach ($flds as $key => $value) {
- $props = explode(';', $value);
-
- $res[$i]['table'] = $got_string ? $case_func($result) : '';
- $res[$i]['name'] = $case_func($key);
- $res[$i]['type'] = $props[0];
- $res[$i]['len'] = $props[1];
- $res[$i]['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;
- }
-
- // }}}
-
- }
-
- /*
- * Local variables:
- * tab-width: 4
- * c-basic-offset: 4
- * End:
- */
-
- ?>
-