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+<?php
+
+/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
+
+/**
+ * The PEAR DB driver for PHP's sybase extension
+ * for interacting with Sybase 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 Sterling Hughes <sterling@php.net>
+ * @author Antônio Carlos Venâncio Júnior <floripa@php.net>
+ * @author Daniel Convissor <danielc@php.net>
+ * @copyright 1997-2005 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 sybase extension
+ * for interacting with Sybase databases
+ *
+ * These methods overload the ones declared in DB_common.
+ *
+ * WARNING: This driver may fail with multiple connections under the
+ * same user/pass/host and different databases.
+ *
+ * @category Database
+ * @package DB
+ * @author Sterling Hughes <sterling@php.net>
+ * @author Antônio Carlos Venâncio Júnior <floripa@php.net>
+ * @author Daniel Convissor <danielc@php.net>
+ * @copyright 1997-2005 The PHP Group
+ * @license http://www.php.net/license/3_0.txt PHP License 3.0
+ * @version Release: @package_version@
+ * @link http://pear.php.net/package/DB
+ */
+class DB_sybase extends DB_common
+{
+ // {{{ properties
+
+ /**
+ * The DB driver type (mysql, oci8, odbc, etc.)
+ * @var string
+ */
+ var $phptype = 'sybase';
+
+ /**
+ * The database syntax variant to be used (db2, access, etc.), if any
+ * @var string
+ */
+ var $dbsyntax = 'sybase';
+
+ /**
+ * 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' => true,
+ 'pconnect' => true,
+ 'prepare' => false,
+ 'ssl' => false,
+ '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 database specified in the DSN
+ *
+ * It's a fix to allow calls to different databases in the same script.
+ *
+ * @var string
+ * @access private
+ */
+ var $_db = '';
+
+
+ // }}}
+ // {{{ constructor
+
+ /**
+ * This constructor calls <kbd>$this->DB_common()</kbd>
+ *
+ * @return void
+ */
+ function DB_sybase()
+ {
+ $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 sybase driver supports the following extra DSN options:
+ * + appname The application name to use on this connection.
+ * Available since PEAR DB 1.7.0.
+ * + charset The character set to use on this connection.
+ * Available since PEAR DB 1.7.0.
+ *
+ * @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('sybase') &&
+ !PEAR::loadExtension('sybase_ct'))
+ {
+ return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
+ }
+
+ $this->dsn = $dsn;
+ if ($dsn['dbsyntax']) {
+ $this->dbsyntax = $dsn['dbsyntax'];
+ }
+
+ $dsn['hostspec'] = $dsn['hostspec'] ? $dsn['hostspec'] : 'localhost';
+ $dsn['password'] = !empty($dsn['password']) ? $dsn['password'] : false;
+ $dsn['charset'] = isset($dsn['charset']) ? $dsn['charset'] : false;
+ $dsn['appname'] = isset($dsn['appname']) ? $dsn['appname'] : false;
+
+ $connect_function = $persistent ? 'sybase_pconnect' : 'sybase_connect';
+
+ if ($dsn['username']) {
+ $this->connection = @$connect_function($dsn['hostspec'],
+ $dsn['username'],
+ $dsn['password'],
+ $dsn['charset'],
+ $dsn['appname']);
+ } else {
+ return $this->raiseError(DB_ERROR_CONNECT_FAILED,
+ null, null, null,
+ 'The DSN did not contain a username.');
+ }
+
+ if (!$this->connection) {
+ return $this->raiseError(DB_ERROR_CONNECT_FAILED,
+ null, null, null,
+ @sybase_get_last_message());
+ }
+
+ if ($dsn['database']) {
+ if (!@sybase_select_db($dsn['database'], $this->connection)) {
+ return $this->raiseError(DB_ERROR_NODBSELECTED,
+ null, null, null,
+ @sybase_get_last_message());
+ }
+ $this->_db = $dsn['database'];
+ }
+
+ return DB_OK;
+ }
+
+ // }}}
+ // {{{ disconnect()
+
+ /**
+ * Disconnects from the database server
+ *
+ * @return bool TRUE on success, FALSE on failure
+ */
+ function disconnect()
+ {
+ $ret = @sybase_close($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)
+ {
+ $ismanip = DB::isManip($query);
+ $this->last_query = $query;
+ if (!@sybase_select_db($this->_db, $this->connection)) {
+ return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED);
+ }
+ $query = $this->modifyQuery($query);
+ if (!$this->autocommit && $ismanip) {
+ if ($this->transaction_opcount == 0) {
+ $result = @sybase_query('BEGIN TRANSACTION', $this->connection);
+ if (!$result) {
+ return $this->sybaseRaiseError();
+ }
+ }
+ $this->transaction_opcount++;
+ }
+ $result = @sybase_query($query, $this->connection);
+ if (!$result) {
+ return $this->sybaseRaiseError();
+ }
+ if (is_resource($result)) {
+ return $result;
+ }
+ // Determine which queries that should return data, and which
+ // should return an error code only.
+ return $ismanip ? DB_OK : $result;
+ }
+
+ // }}}
+ // {{{ nextResult()
+
+ /**
+ * Move the internal sybase result pointer to the next available result
+ *
+ * @param a valid sybase result resource
+ *
+ * @access public
+ *
+ * @return true if a result is available otherwise return false
+ */
+ function nextResult($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, $rownum = null)
+ {
+ if ($rownum !== null) {
+ if (!@sybase_data_seek($result, $rownum)) {
+ return null;
+ }
+ }
+ if ($fetchmode & DB_FETCHMODE_ASSOC) {
+ if (function_exists('sybase_fetch_assoc')) {
+ $arr = @sybase_fetch_assoc($result);
+ } else {
+ if ($arr = @sybase_fetch_array($result)) {
+ foreach ($arr as $key => $value) {
+ if (is_int($key)) {
+ unset($arr[$key]);
+ }
+ }
+ }
+ }
+ if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) {
+ $arr = array_change_key_case($arr, CASE_LOWER);
+ }
+ } else {
+ $arr = @sybase_fetch_row($result);
+ }
+ 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);
+ }
+ 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)
+ {
+ return @sybase_free_result($result);
+ }
+
+ // }}}
+ // {{{ 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)
+ {
+ $cols = @sybase_num_fields($result);
+ if (!$cols) {
+ return $this->sybaseRaiseError();
+ }
+ 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)
+ {
+ $rows = @sybase_num_rows($result);
+ if ($rows === false) {
+ return $this->sybaseRaiseError();
+ }
+ return $rows;
+ }
+
+ // }}}
+ // {{{ affectedRows()
+
+ /**
+ * Determines the number of rows affected by a data maniuplation query
+ *
+ * 0 is returned for queries that don't manipulate data.
+ *
+ * @return int the number of rows. A DB_Error object on failure.
+ */
+ function affectedRows()
+ {
+ if (DB::isManip($this->last_query)) {
+ $result = @sybase_affected_rows($this->connection);
+ } else {
+ $result = 0;
+ }
+ return $result;
+ }
+
+ // }}}
+ // {{{ nextId()
+
+ /**
+ * Returns the next free id in a sequence
+ *
+ * @param string $seq_name name of the sequence
+ * @param boolean $ondemand when true, the seqence is automatically
+ * created if it does not exist
+ *
+ * @return int the next id number in the sequence.
+ * A DB_Error object on failure.
+ *
+ * @see DB_common::nextID(), DB_common::getSequenceName(),
+ * DB_sybase::createSequence(), DB_sybase::dropSequence()
+ */
+ function nextId($seq_name, $ondemand = true)
+ {
+ $seqname = $this->getSequenceName($seq_name);
+ if (!@sybase_select_db($this->_db, $this->connection)) {
+ return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED);
+ }
+ $repeat = 0;
+ do {
+ $this->pushErrorHandling(PEAR_ERROR_RETURN);
+ $result = $this->query("INSERT INTO $seqname (vapor) VALUES (0)");
+ $this->popErrorHandling();
+ if ($ondemand && DB::isError($result) &&
+ ($result->getCode() == DB_ERROR || $result->getCode() == DB_ERROR_NOSUCHTABLE))
+ {
+ $repeat = 1;
+ $result = $this->createSequence($seq_name);
+ if (DB::isError($result)) {
+ return $this->raiseError($result);
+ }
+ } elseif (!DB::isError($result)) {
+ $result =& $this->query("SELECT @@IDENTITY FROM $seqname");
+ $repeat = 0;
+ } else {
+ $repeat = false;
+ }
+ } while ($repeat);
+ if (DB::isError($result)) {
+ return $this->raiseError($result);
+ }
+ $result = $result->fetchRow(DB_FETCHMODE_ORDERED);
+ return $result[0];
+ }
+
+ /**
+ * Creates a new sequence
+ *
+ * @param string $seq_name name of the new sequence
+ *
+ * @return int DB_OK on success. A DB_Error object on failure.
+ *
+ * @see DB_common::createSequence(), DB_common::getSequenceName(),
+ * DB_sybase::nextID(), DB_sybase::dropSequence()
+ */
+ function createSequence($seq_name)
+ {
+ return $this->query('CREATE TABLE '
+ . $this->getSequenceName($seq_name)
+ . ' (id numeric(10, 0) IDENTITY NOT NULL,'
+ . ' vapor int NULL)');
+ }
+
+ // }}}
+ // {{{ dropSequence()
+
+ /**
+ * Deletes a sequence
+ *
+ * @param string $seq_name name of the sequence to be deleted
+ *
+ * @return int DB_OK on success. A DB_Error object on failure.
+ *
+ * @see DB_common::dropSequence(), DB_common::getSequenceName(),
+ * DB_sybase::nextID(), DB_sybase::createSequence()
+ */
+ function dropSequence($seq_name)
+ {
+ return $this->query('DROP TABLE ' . $this->getSequenceName($seq_name));
+ }
+
+ // }}}
+ // {{{ 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) {
+ if (!@sybase_select_db($this->_db, $this->connection)) {
+ return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED);
+ }
+ $result = @sybase_query('COMMIT', $this->connection);
+ $this->transaction_opcount = 0;
+ if (!$result) {
+ return $this->sybaseRaiseError();
+ }
+ }
+ return DB_OK;
+ }
+
+ // }}}
+ // {{{ rollback()
+
+ /**
+ * Reverts the current transaction
+ *
+ * @return int DB_OK on success. A DB_Error object on failure.
+ */
+ function rollback()
+ {
+ if ($this->transaction_opcount > 0) {
+ if (!@sybase_select_db($this->_db, $this->connection)) {
+ return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED);
+ }
+ $result = @sybase_query('ROLLBACK', $this->connection);
+ $this->transaction_opcount = 0;
+ if (!$result) {
+ return $this->sybaseRaiseError();
+ }
+ }
+ return DB_OK;
+ }
+
+ // }}}
+ // {{{ sybaseRaiseError()
+
+ /**
+ * Produces a DB_Error object regarding the current problem
+ *
+ * @param int $errno if the error is being manually raised pass a
+ * DB_ERROR* constant here. If this isn't passed
+ * the error information gathered from the DBMS.
+ *
+ * @return object the DB_Error object
+ *
+ * @see DB_common::raiseError(),
+ * DB_sybase::errorNative(), DB_sybase::errorCode()
+ */
+ function sybaseRaiseError($errno = null)
+ {
+ $native = $this->errorNative();
+ if ($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
+ *
+ * @return string the DBMS' error message
+ */
+ function errorNative()
+ {
+ return @sybase_get_last_message();
+ }
+
+ // }}}
+ // {{{ 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(
+ '/Incorrect syntax near/'
+ => DB_ERROR_SYNTAX,
+ '/^Unclosed quote before the character string [\"\'].*[\"\']\./'
+ => DB_ERROR_SYNTAX,
+ '/Implicit conversion (from datatype|of NUMERIC value)/i'
+ => DB_ERROR_INVALID_NUMBER,
+ '/Cannot drop the table [\"\'].+[\"\'], because it doesn\'t exist in the system catalogs\./'
+ => DB_ERROR_NOSUCHTABLE,
+ '/Only the owner of object [\"\'].+[\"\'] or a user with System Administrator \(SA\) role can run this command\./'
+ => DB_ERROR_ACCESS_VIOLATION,
+ '/^.+ permission denied on object .+, database .+, owner .+/'
+ => DB_ERROR_ACCESS_VIOLATION,
+ '/^.* permission denied, database .+, owner .+/'
+ => DB_ERROR_ACCESS_VIOLATION,
+ '/[^.*] not found\./'
+ => DB_ERROR_NOSUCHTABLE,
+ '/There is already an object named/'
+ => DB_ERROR_ALREADY_EXISTS,
+ '/Invalid column name/'
+ => DB_ERROR_NOSUCHFIELD,
+ '/does not allow null values/'
+ => DB_ERROR_CONSTRAINT_NOT_NULL,
+ '/Command has been aborted/'
+ => DB_ERROR_CONSTRAINT,
+ '/^Cannot drop the index .* because it doesn\'t exist/i'
+ => DB_ERROR_NOT_FOUND,
+ '/^There is already an index/i'
+ => DB_ERROR_ALREADY_EXISTS,
+ '/^There are fewer columns in the INSERT statement than values specified/i'
+ => DB_ERROR_VALUE_COUNT_ON_ROW,
+ );
+ }
+
+ foreach ($error_regexps as $regexp => $code) {
+ if (preg_match($regexp, $errormsg)) {
+ return $code;
+ }
+ }
+ return DB_ERROR;
+ }
+
+ // }}}
+ // {{{ tableInfo()
+
+ /**
+ * Returns information about a table or a result set
+ *
+ * NOTE: only supports 'table' and 'flags' if <var>$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 $mode a valid tableInfo mode
+ *
+ * @return array an associative array with the information requested.
+ * A DB_Error object on failure.
+ *
+ * @see DB_common::tableInfo()
+ * @since Method available since Release 1.6.0
+ */
+ function tableInfo($result, $mode = null)
+ {
+ if (is_string($result)) {
+ /*
+ * Probably received a table name.
+ * Create a result resource identifier.
+ */
+ if (!@sybase_select_db($this->_db, $this->connection)) {
+ return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED);
+ }
+ $id = @sybase_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.
+ * Deprecated. Here for compatibility only.
+ */
+ $id = $result;
+ $got_string = false;
+ }
+
+ if (!is_resource($id)) {
+ return $this->sybaseRaiseError(DB_ERROR_NEED_MORE_DATA);
+ }
+
+ if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
+ $case_func = 'strtolower';
+ } else {
+ $case_func = 'strval';
+ }
+
+ $count = @sybase_num_fields($id);
+ $res = array();
+
+ if ($mode) {
+ $res['num_fields'] = $count;
+ }
+
+ for ($i = 0; $i < $count; $i++) {
+ $f = @sybase_fetch_field($id, $i);
+ // column_source is often blank
+ $res[$i] = array(
+ 'table' => $got_string
+ ? $case_func($result)
+ : $case_func($f->column_source),
+ 'name' => $case_func($f->name),
+ 'type' => $f->type,
+ 'len' => $f->max_length,
+ 'flags' => '',
+ );
+ if ($res[$i]['table']) {
+ $res[$i]['flags'] = $this->_sybase_field_flags(
+ $res[$i]['table'], $res[$i]['name']);
+ }
+ 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) {
+ @sybase_free_result($id);
+ }
+ return $res;
+ }
+
+ // }}}
+ // {{{ _sybase_field_flags()
+
+ /**
+ * Get the flags for a field
+ *
+ * Currently supports:
+ * + <samp>unique_key</samp> (unique index, unique check or primary_key)
+ * + <samp>multiple_key</samp> (multi-key index)
+ *
+ * @param string $table the table name
+ * @param string $column the field name
+ *
+ * @return string space delimited string of flags. Empty string if none.
+ *
+ * @access private
+ */
+ function _sybase_field_flags($table, $column)
+ {
+ static $tableName = null;
+ static $flags = array();
+
+ if ($table != $tableName) {
+ $flags = array();
+ $tableName = $table;
+
+ // get unique/primary keys
+ $res = $this->getAll("sp_helpindex $table", DB_FETCHMODE_ASSOC);
+
+ if (!isset($res[0]['index_description'])) {
+ return '';
+ }
+
+ foreach ($res as $val) {
+ $keys = explode(', ', trim($val['index_keys']));
+
+ if (sizeof($keys) > 1) {
+ foreach ($keys as $key) {
+ $this->_add_flag($flags[$key], 'multiple_key');
+ }
+ }
+
+ if (strpos($val['index_description'], 'unique')) {
+ foreach ($keys as $key) {
+ $this->_add_flag($flags[$key], 'unique_key');
+ }
+ }
+ }
+
+ }
+
+ if (array_key_exists($column, $flags)) {
+ return(implode(' ', $flags[$column]));
+ }
+
+ return '';
+ }
+
+ // }}}
+ // {{{ _add_flag()
+
+ /**
+ * Adds a string to the flags array if the flag is not yet in there
+ * - if there is no flag present the array is created
+ *
+ * @param array $array reference of flags array to add a value to
+ * @param mixed $value value to add to the flag array
+ *
+ * @return void
+ *
+ * @access private
+ */
+ function _add_flag(&$array, $value)
+ {
+ if (!is_array($array)) {
+ $array = array($value);
+ } elseif (!in_array($value, $array)) {
+ array_push($array, $value);
+ }
+ }
+
+ // }}}
+ // {{{ 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 name FROM sysobjects WHERE type = 'U'"
+ . ' ORDER BY name';
+ case 'views':
+ return "SELECT name FROM sysobjects WHERE type = 'V'";
+ default:
+ return null;
+ }
+ }
+
+ // }}}
+
+}
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ */
+
+?>
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