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2008-04-29 6ee5ed253b92593ac5784300ac425f34f7fd1728

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1676e1	1	<?php
S	2
	3	/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
	4
	5	/**
	6	* The PEAR DB driver for PHP's odbc extension
	7	* for interacting with databases via ODBC connections
	8	*
	9	* PHP versions 4 and 5
	10	*
	11	* LICENSE: This source file is subject to version 3.0 of the PHP license
	12	* that is available through the world-wide-web at the following URI:
	13	* http://www.php.net/license/3_0.txt. If you did not receive a copy of
	14	* the PHP License and are unable to obtain it through the web, please
	15	* send a note to license@php.net so we can mail you a copy immediately.
	16	*
	17	* @category Database
	18	* @package DB
	19	* @author Stig Bakken <ssb@php.net>
	20	* @author Daniel Convissor <danielc@php.net>
	21	* @copyright 1997-2005 The PHP Group
	22	* @license http://www.php.net/license/3_0.txt PHP License 3.0
	23	* @version CVS: $Id$
	24	* @link http://pear.php.net/package/DB
	25	*/
	26
	27	/**
	28	* Obtain the DB_common class so it can be extended from
	29	*/
	30	require_once 'DB/common.php';
	31
	32	/**
	33	* The methods PEAR DB uses to interact with PHP's odbc extension
	34	* for interacting with databases via ODBC connections
	35	*
	36	* These methods overload the ones declared in DB_common.
	37	*
	38	* More info on ODBC errors could be found here:
	39	* http://msdn.microsoft.com/library/default.asp?url=/library/en-us/trblsql/tr_err_odbc_5stz.asp
	40	*
	41	* @category Database
	42	* @package DB
	43	* @author Stig Bakken <ssb@php.net>
	44	* @author Daniel Convissor <danielc@php.net>
	45	* @copyright 1997-2005 The PHP Group
	46	* @license http://www.php.net/license/3_0.txt PHP License 3.0
	47	* @version Release: @package_version@
	48	* @link http://pear.php.net/package/DB
	49	*/
	50	class DB_odbc extends DB_common
	51	{
	52	// {{{ properties
	53
	54	/**
	55	* The DB driver type (mysql, oci8, odbc, etc.)
	56	* @var string
	57	*/
	58	var $phptype = 'odbc';
	59
	60	/**
	61	* The database syntax variant to be used (db2, access, etc.), if any
	62	* @var string
	63	*/
	64	var $dbsyntax = 'sql92';
	65
	66	/**
	67	* The capabilities of this DB implementation
	68	*
	69	* The 'new_link' element contains the PHP version that first provided
	70	* new_link support for this DBMS. Contains false if it's unsupported.
	71	*
	72	* Meaning of the 'limit' element:
	73	* + 'emulate' = emulate with fetch row by number
	74	* + 'alter' = alter the query
	75	* + false = skip rows
	76	*
	77	* NOTE: The feature set of the following drivers are different than
	78	* the default:
	79	* + solid: 'transactions' = true
	80	* + navision: 'limit' = false
	81	*
	82	* @var array
	83	*/
	84	var $features = array(
	85	'limit' => 'emulate',
	86	'new_link' => false,
	87	'numrows' => true,
	88	'pconnect' => true,
	89	'prepare' => false,
	90	'ssl' => false,
	91	'transactions' => false,
	92	);
	93
	94	/**
	95	* A mapping of native error codes to DB error codes
	96	* @var array
	97	*/
	98	var $errorcode_map = array(
	99	'01004' => DB_ERROR_TRUNCATED,
	100	'07001' => DB_ERROR_MISMATCH,
	101	'21S01' => DB_ERROR_VALUE_COUNT_ON_ROW,
	102	'21S02' => DB_ERROR_MISMATCH,
	103	'22001' => DB_ERROR_INVALID,
	104	'22003' => DB_ERROR_INVALID_NUMBER,
	105	'22005' => DB_ERROR_INVALID_NUMBER,
	106	'22008' => DB_ERROR_INVALID_DATE,
	107	'22012' => DB_ERROR_DIVZERO,
	108	'23000' => DB_ERROR_CONSTRAINT,
	109	'23502' => DB_ERROR_CONSTRAINT_NOT_NULL,
	110	'23503' => DB_ERROR_CONSTRAINT,
	111	'23504' => DB_ERROR_CONSTRAINT,
	112	'23505' => DB_ERROR_CONSTRAINT,
	113	'24000' => DB_ERROR_INVALID,
	114	'34000' => DB_ERROR_INVALID,
	115	'37000' => DB_ERROR_SYNTAX,
	116	'42000' => DB_ERROR_SYNTAX,
	117	'42601' => DB_ERROR_SYNTAX,
	118	'IM001' => DB_ERROR_UNSUPPORTED,
	119	'S0000' => DB_ERROR_NOSUCHTABLE,
	120	'S0001' => DB_ERROR_ALREADY_EXISTS,
	121	'S0002' => DB_ERROR_NOSUCHTABLE,
	122	'S0011' => DB_ERROR_ALREADY_EXISTS,
	123	'S0012' => DB_ERROR_NOT_FOUND,
	124	'S0021' => DB_ERROR_ALREADY_EXISTS,
	125	'S0022' => DB_ERROR_NOSUCHFIELD,
	126	'S1009' => DB_ERROR_INVALID,
	127	'S1090' => DB_ERROR_INVALID,
	128	'S1C00' => DB_ERROR_NOT_CAPABLE,
	129	);
	130
	131	/**
	132	* The raw database connection created by PHP
	133	* @var resource
	134	*/
	135	var $connection;
	136
	137	/**
	138	* The DSN information for connecting to a database
	139	* @var array
	140	*/
	141	var $dsn = array();
	142
	143
	144	/**
	145	* The number of rows affected by a data manipulation query
	146	* @var integer
	147	* @access private
	148	*/
	149	var $affected = 0;
	150
	151
	152	// }}}
	153	// {{{ constructor
	154
	155	/**
	156	* This constructor calls <kbd>$this->DB_common()</kbd>
	157	*
	158	* @return void
	159	*/
	160	function DB_odbc()
	161	{
	162	$this->DB_common();
	163	}
	164
	165	// }}}
	166	// {{{ connect()
	167
	168	/**
	169	* Connect to the database server, log in and open the database
	170	*
	171	* Don't call this method directly. Use DB::connect() instead.
	172	*
	173	* PEAR DB's odbc driver supports the following extra DSN options:
	174	* + cursor The type of cursor to be used for this connection.
	175	*
	176	* @param array $dsn the data source name
	177	* @param bool $persistent should the connection be persistent?
	178	*
	179	* @return int DB_OK on success. A DB_Error object on failure.
	180	*/
	181	function connect($dsn, $persistent = false)
	182	{
	183	if (!PEAR::loadExtension('odbc')) {
	184	return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
	185	}
	186
	187	$this->dsn = $dsn;
	188	if ($dsn['dbsyntax']) {
	189	$this->dbsyntax = $dsn['dbsyntax'];
	190	}
	191	switch ($this->dbsyntax) {
	192	case 'access':
	193	case 'db2':
	194	case 'solid':
	195	$this->features['transactions'] = true;
	196	break;
	197	case 'navision':
	198	$this->features['limit'] = false;
	199	}
	200
	201	/*
	202	* This is hear for backwards compatibility. Should have been using
	203	* 'database' all along, but prior to 1.6.0RC3 'hostspec' was used.
	204	*/
	205	if ($dsn['database']) {
	206	$odbcdsn = $dsn['database'];
	207	} elseif ($dsn['hostspec']) {
	208	$odbcdsn = $dsn['hostspec'];
	209	} else {
	210	$odbcdsn = 'localhost';
	211	}
	212
	213	$connect_function = $persistent ? 'odbc_pconnect' : 'odbc_connect';
	214
	215	if (empty($dsn['cursor'])) {
	216	$this->connection = @$connect_function($odbcdsn, $dsn['username'],
	217	$dsn['password']);
	218	} else {
	219	$this->connection = @$connect_function($odbcdsn, $dsn['username'],
	220	$dsn['password'],
	221	$dsn['cursor']);
	222	}
	223
	224	if (!is_resource($this->connection)) {
	225	return $this->raiseError(DB_ERROR_CONNECT_FAILED,
	226	null, null, null,
	227	$this->errorNative());
	228	}
	229	return DB_OK;
	230	}
	231
	232	// }}}
	233	// {{{ disconnect()
	234
	235	/**
	236	* Disconnects from the database server
	237	*
	238	* @return bool TRUE on success, FALSE on failure
	239	*/
	240	function disconnect()
	241	{
	242	$err = @odbc_close($this->connection);
	243	$this->connection = null;
	244	return $err;
	245	}
	246
	247	// }}}
	248	// {{{ simpleQuery()
	249
	250	/**
	251	* Sends a query to the database server
	252	*
	253	* @param string the SQL query string
	254	*
	255	* @return mixed + a PHP result resrouce for successful SELECT queries
	256	* + the DB_OK constant for other successful queries
	257	* + a DB_Error object on failure
	258	*/
	259	function simpleQuery($query)
	260	{
	261	$this->last_query = $query;
	262	$query = $this->modifyQuery($query);
	263	$result = @odbc_exec($this->connection, $query);
	264	if (!$result) {
	265	return $this->odbcRaiseError(); // XXX ERRORMSG
	266	}
	267	// Determine which queries that should return data, and which
	268	// should return an error code only.
	269	if (DB::isManip($query)) {
	270	$this->affected = $result; // For affectedRows()
	271	return DB_OK;
	272	}
	273	$this->affected = 0;
	274	return $result;
	275	}
	276
	277	// }}}
	278	// {{{ nextResult()
	279
	280	/**
	281	* Move the internal odbc result pointer to the next available result
	282	*
	283	* @param a valid fbsql result resource
	284	*
	285	* @access public
	286	*
	287	* @return true if a result is available otherwise return false
	288	*/
	289	function nextResult($result)
	290	{
	291	return @odbc_next_result($result);
	292	}
	293
	294	// }}}
	295	// {{{ fetchInto()
	296
	297	/**
	298	* Places a row from the result set into the given array
	299	*
	300	* Formating of the array and the data therein are configurable.
	301	* See DB_result::fetchInto() for more information.
	302	*
	303	* This method is not meant to be called directly. Use
	304	* DB_result::fetchInto() instead. It can't be declared "protected"
	305	* because DB_result is a separate object.
	306	*
	307	* @param resource $result the query result resource
	308	* @param array $arr the referenced array to put the data in
	309	* @param int $fetchmode how the resulting array should be indexed
	310	* @param int $rownum the row number to fetch (0 = first row)
	311	*
	312	* @return mixed DB_OK on success, NULL when the end of a result set is
	313	* reached or on failure
	314	*
	315	* @see DB_result::fetchInto()
	316	*/
	317	function fetchInto($result, &$arr, $fetchmode, $rownum = null)
	318	{
	319	$arr = array();
	320	if ($rownum !== null) {
	321	$rownum++; // ODBC first row is 1
	322	if (version_compare(phpversion(), '4.2.0', 'ge')) {
	323	$cols = @odbc_fetch_into($result, $arr, $rownum);
	324	} else {
	325	$cols = @odbc_fetch_into($result, $rownum, $arr);
	326	}
	327	} else {
	328	$cols = @odbc_fetch_into($result, $arr);
	329	}
	330	if (!$cols) {
	331	return null;
	332	}
	333	if ($fetchmode !== DB_FETCHMODE_ORDERED) {
	334	for ($i = 0; $i < count($arr); $i++) {
	335	$colName = @odbc_field_name($result, $i+1);
	336	$a[$colName] = $arr[$i];
	337	}
	338	if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
	339	$a = array_change_key_case($a, CASE_LOWER);
	340	}
	341	$arr = $a;
	342	}
	343	if ($this->options['portability'] & DB_PORTABILITY_RTRIM) {
	344	$this->_rtrimArrayValues($arr);
	345	}
	346	if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) {
	347	$this->_convertNullArrayValuesToEmpty($arr);
	348	}
	349	return DB_OK;
	350	}
	351
	352	// }}}
	353	// {{{ freeResult()
	354
	355	/**
	356	* Deletes the result set and frees the memory occupied by the result set
	357	*
	358	* This method is not meant to be called directly. Use
	359	* DB_result::free() instead. It can't be declared "protected"
	360	* because DB_result is a separate object.
	361	*
	362	* @param resource $result PHP's query result resource
	363	*
	364	* @return bool TRUE on success, FALSE if $result is invalid
	365	*
	366	* @see DB_result::free()
	367	*/
	368	function freeResult($result)
	369	{
	370	return @odbc_free_result($result);
	371	}
	372
	373	// }}}
	374	// {{{ numCols()
	375
	376	/**
	377	* Gets the number of columns in a result set
	378	*
	379	* This method is not meant to be called directly. Use
	380	* DB_result::numCols() instead. It can't be declared "protected"
	381	* because DB_result is a separate object.
	382	*
	383	* @param resource $result PHP's query result resource
	384	*
	385	* @return int the number of columns. A DB_Error object on failure.
	386	*
	387	* @see DB_result::numCols()
	388	*/
	389	function numCols($result)
	390	{
	391	$cols = @odbc_num_fields($result);
	392	if (!$cols) {
	393	return $this->odbcRaiseError();
	394	}
	395	return $cols;
	396	}
	397
	398	// }}}
	399	// {{{ affectedRows()
	400
	401	/**
	402	* Determines the number of rows affected by a data maniuplation query
	403	*
	404	* 0 is returned for queries that don't manipulate data.
	405	*
	406	* @return int the number of rows. A DB_Error object on failure.
	407	*/
	408	function affectedRows()
	409	{
	410	if (empty($this->affected)) { // In case of SELECT stms
	411	return 0;
	412	}
	413	$nrows = @odbc_num_rows($this->affected);
	414	if ($nrows == -1) {
	415	return $this->odbcRaiseError();
	416	}
	417	return $nrows;
	418	}
	419
	420	// }}}
	421	// {{{ numRows()
	422
	423	/**
	424	* Gets the number of rows in a result set
	425	*
	426	* Not all ODBC drivers support this functionality. If they don't
	427	* a DB_Error object for DB_ERROR_UNSUPPORTED is returned.
	428	*
	429	* This method is not meant to be called directly. Use
	430	* DB_result::numRows() instead. It can't be declared "protected"
	431	* because DB_result is a separate object.
	432	*
	433	* @param resource $result PHP's query result resource
	434	*
	435	* @return int the number of rows. A DB_Error object on failure.
	436	*
	437	* @see DB_result::numRows()
	438	*/
	439	function numRows($result)
	440	{
	441	$nrows = @odbc_num_rows($result);
	442	if ($nrows == -1) {
	443	return $this->odbcRaiseError(DB_ERROR_UNSUPPORTED);
	444	}
	445	if ($nrows === false) {
	446	return $this->odbcRaiseError();
	447	}
	448	return $nrows;
	449	}
	450
	451	// }}}
	452	// {{{ quoteIdentifier()
	453
	454	/**
	455	* Quotes a string so it can be safely used as a table or column name
	456	*
	457	* Use 'mssql' as the dbsyntax in the DB DSN only if you've unchecked
	458	* "Use ANSI quoted identifiers" when setting up the ODBC data source.
	459	*
	460	* @param string $str identifier name to be quoted
	461	*
	462	* @return string quoted identifier string
	463	*
	464	* @see DB_common::quoteIdentifier()
	465	* @since Method available since Release 1.6.0
	466	*/
	467	function quoteIdentifier($str)
	468	{
	469	switch ($this->dsn['dbsyntax']) {
	470	case 'access':
	471	return '[' . $str . ']';
	472	case 'mssql':
	473	case 'sybase':
	474	return '[' . str_replace(']', ']]', $str) . ']';
	475	case 'mysql':
	476	case 'mysqli':
	477	return '`' . $str . '`';
	478	default:
	479	return '"' . str_replace('"', '""', $str) . '"';
	480	}
	481	}
	482
	483	// }}}
	484	// {{{ quote()
	485
	486	/**
	487	* @deprecated Deprecated in release 1.6.0
	488	* @internal
	489	*/
	490	function quote($str)
	491	{
	492	return $this->quoteSmart($str);
	493	}
	494
	495	// }}}
	496	// {{{ nextId()
	497
	498	/**
	499	* Returns the next free id in a sequence
	500	*
	501	* @param string $seq_name name of the sequence
	502	* @param boolean $ondemand when true, the seqence is automatically
	503	* created if it does not exist
	504	*
	505	* @return int the next id number in the sequence.
	506	* A DB_Error object on failure.
	507	*
	508	* @see DB_common::nextID(), DB_common::getSequenceName(),
	509	* DB_odbc::createSequence(), DB_odbc::dropSequence()
	510	*/
	511	function nextId($seq_name, $ondemand = true)
	512	{
	513	$seqname = $this->getSequenceName($seq_name);
	514	$repeat = 0;
	515	do {
	516	$this->pushErrorHandling(PEAR_ERROR_RETURN);
	517	$result = $this->query("update ${seqname} set id = id + 1");
	518	$this->popErrorHandling();
	519	if ($ondemand && DB::isError($result) &&
	520	$result->getCode() == DB_ERROR_NOSUCHTABLE) {
	521	$repeat = 1;
	522	$this->pushErrorHandling(PEAR_ERROR_RETURN);
	523	$result = $this->createSequence($seq_name);
	524	$this->popErrorHandling();
	525	if (DB::isError($result)) {
	526	return $this->raiseError($result);
	527	}
	528	$result = $this->query("insert into ${seqname} (id) values(0)");
	529	} else {
	530	$repeat = 0;
	531	}
	532	} while ($repeat);
	533
	534	if (DB::isError($result)) {
	535	return $this->raiseError($result);
	536	}
	537
	538	$result = $this->query("select id from ${seqname}");
	539	if (DB::isError($result)) {
	540	return $result;
	541	}
	542
	543	$row = $result->fetchRow(DB_FETCHMODE_ORDERED);
	544	if (DB::isError($row \|\| !$row)) {
	545	return $row;
	546	}
	547
	548	return $row[0];
	549	}
	550
	551	/**
	552	* Creates a new sequence
	553	*
	554	* @param string $seq_name name of the new sequence
	555	*
	556	* @return int DB_OK on success. A DB_Error object on failure.
	557	*
	558	* @see DB_common::createSequence(), DB_common::getSequenceName(),
	559	* DB_odbc::nextID(), DB_odbc::dropSequence()
	560	*/
	561	function createSequence($seq_name)
	562	{
	563	return $this->query('CREATE TABLE '
	564	. $this->getSequenceName($seq_name)
	565	. ' (id integer NOT NULL,'
	566	. ' PRIMARY KEY(id))');
	567	}
	568
	569	// }}}
	570	// {{{ dropSequence()
	571
	572	/**
	573	* Deletes a sequence
	574	*
	575	* @param string $seq_name name of the sequence to be deleted
	576	*
	577	* @return int DB_OK on success. A DB_Error object on failure.
	578	*
	579	* @see DB_common::dropSequence(), DB_common::getSequenceName(),
	580	* DB_odbc::nextID(), DB_odbc::createSequence()
	581	*/
	582	function dropSequence($seq_name)
	583	{
	584	return $this->query('DROP TABLE ' . $this->getSequenceName($seq_name));
	585	}
	586
	587	// }}}
	588	// {{{ autoCommit()
	589
	590	/**
	591	* Enables or disables automatic commits
	592	*
	593	* @param bool $onoff true turns it on, false turns it off
	594	*
	595	* @return int DB_OK on success. A DB_Error object if the driver
	596	* doesn't support auto-committing transactions.
	597	*/
	598	function autoCommit($onoff = false)
	599	{
	600	if (!@odbc_autocommit($this->connection, $onoff)) {
	601	return $this->odbcRaiseError();
	602	}
	603	return DB_OK;
	604	}
	605
	606	// }}}
	607	// {{{ commit()
	608
	609	/**
	610	* Commits the current transaction
	611	*
	612	* @return int DB_OK on success. A DB_Error object on failure.
	613	*/
	614	function commit()
	615	{
	616	if (!@odbc_commit($this->connection)) {
	617	return $this->odbcRaiseError();
	618	}
	619	return DB_OK;
	620	}
	621
	622	// }}}
	623	// {{{ rollback()
	624
	625	/**
	626	* Reverts the current transaction
	627	*
	628	* @return int DB_OK on success. A DB_Error object on failure.
	629	*/
	630	function rollback()
	631	{
	632	if (!@odbc_rollback($this->connection)) {
	633	return $this->odbcRaiseError();
	634	}
	635	return DB_OK;
	636	}
	637
	638	// }}}
	639	// {{{ odbcRaiseError()
	640
	641	/**
	642	* Produces a DB_Error object regarding the current problem
	643	*
	644	* @param int $errno if the error is being manually raised pass a
	645	* DB_ERROR* constant here. If this isn't passed
	646	* the error information gathered from the DBMS.
	647	*
	648	* @return object the DB_Error object
	649	*
	650	* @see DB_common::raiseError(),
	651	* DB_odbc::errorNative(), DB_common::errorCode()
	652	*/
	653	function odbcRaiseError($errno = null)
	654	{
	655	if ($errno === null) {
	656	switch ($this->dbsyntax) {
	657	case 'access':
	658	if ($this->options['portability'] & DB_PORTABILITY_ERRORS) {
	659	$this->errorcode_map['07001'] = DB_ERROR_NOSUCHFIELD;
	660	} else {
	661	// Doing this in case mode changes during runtime.
	662	$this->errorcode_map['07001'] = DB_ERROR_MISMATCH;
	663	}
	664
	665	$native_code = odbc_error($this->connection);
	666
	667	// S1000 is for "General Error." Let's be more specific.
	668	if ($native_code == 'S1000') {
	669	$errormsg = odbc_errormsg($this->connection);
	670	static $error_regexps;
	671	if (!isset($error_regexps)) {
	672	$error_regexps = array(
	673	'/includes related records.$/i' => DB_ERROR_CONSTRAINT,
	674	'/cannot contain a Null value/i' => DB_ERROR_CONSTRAINT_NOT_NULL,
	675	);
	676	}
	677	foreach ($error_regexps as $regexp => $code) {
	678	if (preg_match($regexp, $errormsg)) {
	679	return $this->raiseError($code,
	680	null, null, null,
	681	$native_code . ' ' . $errormsg);
	682	}
	683	}
	684	$errno = DB_ERROR;
	685	} else {
	686	$errno = $this->errorCode($native_code);
	687	}
	688	break;
	689	default:
	690	$errno = $this->errorCode(odbc_error($this->connection));
	691	}
	692	}
	693	return $this->raiseError($errno, null, null, null,
	694	$this->errorNative());
	695	}
	696
	697	// }}}
	698	// {{{ errorNative()
	699
	700	/**
	701	* Gets the DBMS' native error code and message produced by the last query
	702	*
	703	* @return string the DBMS' error code and message
	704	*/
	705	function errorNative()
	706	{
	707	if (!is_resource($this->connection)) {
	708	return @odbc_error() . ' ' . @odbc_errormsg();
	709	}
	710	return @odbc_error($this->connection) . ' ' . @odbc_errormsg($this->connection);
	711	}
	712
	713	// }}}
	714	// {{{ tableInfo()
	715
	716	/**
	717	* Returns information about a table or a result set
	718	*
	719	* @param object\|string $result DB_result object from a query or a
	720	* string containing the name of a table.
	721	* While this also accepts a query result
	722	* resource identifier, this behavior is
	723	* deprecated.
	724	* @param int $mode a valid tableInfo mode
	725	*
	726	* @return array an associative array with the information requested.
	727	* A DB_Error object on failure.
	728	*
	729	* @see DB_common::tableInfo()
	730	* @since Method available since Release 1.7.0
	731	*/
	732	function tableInfo($result, $mode = null)
	733	{
	734	if (is_string($result)) {
	735	/*
	736	* Probably received a table name.
	737	* Create a result resource identifier.
	738	*/
	739	$id = @odbc_exec($this->connection, "SELECT * FROM $result");
	740	if (!$id) {
	741	return $this->odbcRaiseError();
	742	}
	743	$got_string = true;
	744	} elseif (isset($result->result)) {
	745	/*
	746	* Probably received a result object.
	747	* Extract the result resource identifier.
	748	*/
	749	$id = $result->result;
	750	$got_string = false;
	751	} else {
	752	/*
	753	* Probably received a result resource identifier.
	754	* Copy it.
	755	* Deprecated. Here for compatibility only.
	756	*/
	757	$id = $result;
	758	$got_string = false;
	759	}
	760
	761	if (!is_resource($id)) {
	762	return $this->odbcRaiseError(DB_ERROR_NEED_MORE_DATA);
	763	}
	764
	765	if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
	766	$case_func = 'strtolower';
	767	} else {
	768	$case_func = 'strval';
	769	}
	770
	771	$count = @odbc_num_fields($id);
	772	$res = array();
	773
	774	if ($mode) {
	775	$res['num_fields'] = $count;
	776	}
	777
	778	for ($i = 0; $i < $count; $i++) {
	779	$col = $i + 1;
	780	$res[$i] = array(
	781	'table' => $got_string ? $case_func($result) : '',
	782	'name' => $case_func(@odbc_field_name($id, $col)),
	783	'type' => @odbc_field_type($id, $col),
	784	'len' => @odbc_field_len($id, $col),
	785	'flags' => '',
	786	);
	787	if ($mode & DB_TABLEINFO_ORDER) {
	788	$res['order'][$res[$i]['name']] = $i;
	789	}
	790	if ($mode & DB_TABLEINFO_ORDERTABLE) {
	791	$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
	792	}
	793	}
	794
	795	// free the result only if we were called on a table
	796	if ($got_string) {
	797	@odbc_free_result($id);
	798	}
	799	return $res;
	800	}
	801
	802	// }}}
	803	// {{{ getSpecialQuery()
	804
	805	/**
	806	* Obtains the query string needed for listing a given type of objects
	807	*
	808	* Thanks to symbol1@gmail.com and Philippe.Jausions@11abacus.com.
	809	*
	810	* @param string $type the kind of objects you want to retrieve
	811	*
	812	* @return string the list of objects requested
	813	*
	814	* @access protected
	815	* @see DB_common::getListOf()
	816	* @since Method available since Release 1.7.0
	817	*/
	818	function getSpecialQuery($type)
	819	{
	820	switch ($type) {
	821	case 'databases':
	822	if (!function_exists('odbc_data_source')) {
	823	return null;
	824	}
	825	$res = @odbc_data_source($this->connection, SQL_FETCH_FIRST);
	826	if (is_array($res)) {
	827	$out = array($res['server']);
	828	while($res = @odbc_data_source($this->connection,
	829	SQL_FETCH_NEXT))
	830	{
	831	$out[] = $res['server'];
	832	}
	833	return $out;
	834	} else {
	835	return $this->odbcRaiseError();
	836	}
	837	break;
	838	case 'tables':
	839	case 'schema.tables':
	840	$keep = 'TABLE';
	841	break;
	842	case 'views':
	843	$keep = 'VIEW';
	844	break;
	845	default:
	846	return null;
	847	}
	848
	849	/*
	850	* Removing non-conforming items in the while loop rather than
	851	* in the odbc_tables() call because some backends choke on this:
	852	* odbc_tables($this->connection, '', '', '', 'TABLE')
	853	*/
	854	$res = @odbc_tables($this->connection);
	855	if (!$res) {
	856	return $this->odbcRaiseError();
	857	}
	858	$out = array();
	859	while ($row = odbc_fetch_array($res)) {
	860	if ($row['TABLE_TYPE'] != $keep) {
	861	continue;
	862	}
	863	if ($type == 'schema.tables') {
	864	$out[] = $row['TABLE_SCHEM'] . '.' . $row['TABLE_NAME'];
	865	} else {
	866	$out[] = $row['TABLE_NAME'];
	867	}
	868	}
	869	return $out;
	870	}
	871
	872	// }}}
	873
	874	}
	875
	876	/*
	877	* Local variables:
	878	* tab-width: 4
	879	* c-basic-offset: 4
	880	* End:
	881	*/
	882
	883	?>