Added PEAR:DB support plus database replication support

1 files changed, 883 insertions, 0 deletions

diff --git a/program/lib/DB/odbc.php b/program/lib/DB/odbc.php
new file mode 100644
index 000000000..c920d7a63
--- /dev/null
+++ b/program/lib/DB/odbc.php
@@ -0,0 +1,883 @@
+<?php
+
+/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
+
+/**
+ * The PEAR DB driver for PHP's odbc extension
+ * for interacting with databases via ODBC connections
+ *
+ * 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     Stig Bakken <ssb@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 odbc extension
+ * for interacting with databases via ODBC connections
+ *
+ * These methods overload the ones declared in DB_common.
+ *
+ * More info on ODBC errors could be found here:
+ * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/trblsql/tr_err_odbc_5stz.asp
+ *
+ * @category   Database
+ * @package    DB
+ * @author     Stig Bakken <ssb@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_odbc extends DB_common
+{
+    // {{{ properties
+
+    /**
+     * The DB driver type (mysql, oci8, odbc, etc.)
+     * @var string
+     */
+    var $phptype = 'odbc';
+
+    /**
+     * The database syntax variant to be used (db2, access, etc.), if any
+     * @var string
+     */
+    var $dbsyntax = 'sql92';
+
+    /**
+     * 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
+     *
+     * NOTE: The feature set of the following drivers are different than
+     * the default:
+     *   + solid: 'transactions' = true
+     *   + navision: 'limit' = false
+     *
+     * @var array
+     */
+    var $features = array(
+        'limit'         => 'emulate',
+        'new_link'      => false,
+        'numrows'       => true,
+        'pconnect'      => true,
+        'prepare'       => false,
+        'ssl'           => false,
+        'transactions'  => false,
+    );
+
+    /**
+     * A mapping of native error codes to DB error codes
+     * @var array
+     */
+    var $errorcode_map = array(
+        '01004' => DB_ERROR_TRUNCATED,
+        '07001' => DB_ERROR_MISMATCH,
+        '21S01' => DB_ERROR_VALUE_COUNT_ON_ROW,
+        '21S02' => DB_ERROR_MISMATCH,
+        '22001' => DB_ERROR_INVALID,
+        '22003' => DB_ERROR_INVALID_NUMBER,
+        '22005' => DB_ERROR_INVALID_NUMBER,
+        '22008' => DB_ERROR_INVALID_DATE,
+        '22012' => DB_ERROR_DIVZERO,
+        '23000' => DB_ERROR_CONSTRAINT,
+        '23502' => DB_ERROR_CONSTRAINT_NOT_NULL,
+        '23503' => DB_ERROR_CONSTRAINT,
+        '23504' => DB_ERROR_CONSTRAINT,
+        '23505' => DB_ERROR_CONSTRAINT,
+        '24000' => DB_ERROR_INVALID,
+        '34000' => DB_ERROR_INVALID,
+        '37000' => DB_ERROR_SYNTAX,
+        '42000' => DB_ERROR_SYNTAX,
+        '42601' => DB_ERROR_SYNTAX,
+        'IM001' => DB_ERROR_UNSUPPORTED,
+        'S0000' => DB_ERROR_NOSUCHTABLE,
+        'S0001' => DB_ERROR_ALREADY_EXISTS,
+        'S0002' => DB_ERROR_NOSUCHTABLE,
+        'S0011' => DB_ERROR_ALREADY_EXISTS,
+        'S0012' => DB_ERROR_NOT_FOUND,
+        'S0021' => DB_ERROR_ALREADY_EXISTS,
+        'S0022' => DB_ERROR_NOSUCHFIELD,
+        'S1009' => DB_ERROR_INVALID,
+        'S1090' => DB_ERROR_INVALID,
+        'S1C00' => DB_ERROR_NOT_CAPABLE,
+    );
+
+    /**
+     * The raw database connection created by PHP
+     * @var resource
+     */
+    var $connection;
+
+    /**
+     * The DSN information for connecting to a database
+     * @var array
+     */
+    var $dsn = array();
+
+
+    /**
+     * 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_odbc()
+    {
+        $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 odbc driver supports the following extra DSN options:
+     *   + cursor  The type of cursor to be used for this connection.
+     *
+     * @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('odbc')) {
+            return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
+        }
+
+        $this->dsn = $dsn;
+        if ($dsn['dbsyntax']) {
+            $this->dbsyntax = $dsn['dbsyntax'];
+        }
+        switch ($this->dbsyntax) {
+            case 'access':
+            case 'db2':
+            case 'solid':
+                $this->features['transactions'] = true;
+                break;
+            case 'navision':
+                $this->features['limit'] = false;
+        }
+
+        /*
+         * This is hear for backwards compatibility. Should have been using
+         * 'database' all along, but prior to 1.6.0RC3 'hostspec' was used.
+         */
+        if ($dsn['database']) {
+            $odbcdsn = $dsn['database'];
+        } elseif ($dsn['hostspec']) {
+            $odbcdsn = $dsn['hostspec'];
+        } else {
+            $odbcdsn = 'localhost';
+        }
+
+        $connect_function = $persistent ? 'odbc_pconnect' : 'odbc_connect';
+
+        if (empty($dsn['cursor'])) {
+            $this->connection = @$connect_function($odbcdsn, $dsn['username'],
+                                                   $dsn['password']);
+        } else {
+            $this->connection = @$connect_function($odbcdsn, $dsn['username'],
+                                                   $dsn['password'],
+                                                   $dsn['cursor']);
+        }
+
+        if (!is_resource($this->connection)) {
+            return $this->raiseError(DB_ERROR_CONNECT_FAILED,
+                                     null, null, null,
+                                     $this->errorNative());
+        }
+        return DB_OK;
+    }
+
+    // }}}
+    // {{{ disconnect()
+
+    /**
+     * Disconnects from the database server
+     *
+     * @return bool  TRUE on success, FALSE on failure
+     */
+    function disconnect()
+    {
+        $err = @odbc_close($this->connection);
+        $this->connection = null;
+        return $err;
+    }
+
+    // }}}
+    // {{{ simpleQuery()
+
+    /**
+     * Sends a query to the database server
+     *
+     * @param string  the SQL query string
+     *
+     * @return mixed  + a PHP result resrouce for successful SELECT queries
+     *                + the DB_OK constant for other successful queries
+     *                + a DB_Error object on failure
+     */
+    function simpleQuery($query)
+    {
+        $this->last_query = $query;
+        $query = $this->modifyQuery($query);
+        $result = @odbc_exec($this->connection, $query);
+        if (!$result) {
+            return $this->odbcRaiseError(); // XXX ERRORMSG
+        }
+        // Determine which queries that should return data, and which
+        // should return an error code only.
+        if (DB::isManip($query)) {
+            $this->affected = $result; // For affectedRows()
+            return DB_OK;
+        }
+        $this->affected = 0;
+        return $result;
+    }
+
+    // }}}
+    // {{{ nextResult()
+
+    /**
+     * Move the internal odbc result pointer to the next available result
+     *
+     * @param a valid fbsql result resource
+     *
+     * @access public
+     *
+     * @return true if a result is available otherwise return false
+     */
+    function nextResult($result)
+    {
+        return @odbc_next_result($result);
+    }
+
+    // }}}
+    // {{{ 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)
+    {
+        $arr = array();
+        if ($rownum !== null) {
+            $rownum++; // ODBC first row is 1
+            if (version_compare(phpversion(), '4.2.0', 'ge')) {
+                $cols = @odbc_fetch_into($result, $arr, $rownum);
+            } else {
+                $cols = @odbc_fetch_into($result, $rownum, $arr);
+            }
+        } else {
+            $cols = @odbc_fetch_into($result, $arr);
+        }
+        if (!$cols) {
+            return null;
+        }
+        if ($fetchmode !== DB_FETCHMODE_ORDERED) {
+            for ($i = 0; $i < count($arr); $i++) {
+                $colName = @odbc_field_name($result, $i+1);
+                $a[$colName] = $arr[$i];
+            }
+            if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
+                $a = array_change_key_case($a, CASE_LOWER);
+            }
+            $arr = $a;
+        }
+        if ($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 @odbc_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)
+    {
+        $cols = @odbc_num_fields($result);
+        if (!$cols) {
+            return $this->odbcRaiseError();
+        }
+        return $cols;
+    }
+
+    // }}}
+    // {{{ affectedRows()
+
+    /**
+     * Determines the number of rows affected by a data maniuplation query
+     *
+     * 0 is returned for queries that don't manipulate data.
+     *
+     * @return int  the number of rows.  A DB_Error object on failure.
+     */
+    function affectedRows()
+    {
+        if (empty($this->affected)) {  // In case of SELECT stms
+            return 0;
+        }
+        $nrows = @odbc_num_rows($this->affected);
+        if ($nrows == -1) {
+            return $this->odbcRaiseError();
+        }
+        return $nrows;
+    }
+
+    // }}}
+    // {{{ numRows()
+
+    /**
+     * Gets the number of rows in a result set
+     *
+     * Not all ODBC drivers support this functionality.  If they don't
+     * a DB_Error object for DB_ERROR_UNSUPPORTED is returned.
+     *
+     * 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)
+    {
+        $nrows = @odbc_num_rows($result);
+        if ($nrows == -1) {
+            return $this->odbcRaiseError(DB_ERROR_UNSUPPORTED);
+        }
+        if ($nrows === false) {
+            return $this->odbcRaiseError();
+        }
+        return $nrows;
+    }
+
+    // }}}
+    // {{{ quoteIdentifier()
+
+    /**
+     * Quotes a string so it can be safely used as a table or column name
+     *
+     * Use 'mssql' as the dbsyntax in the DB DSN only if you've unchecked
+     * "Use ANSI quoted identifiers" when setting up the ODBC data source.
+     *
+     * @param string $str  identifier name to be quoted
+     *
+     * @return string  quoted identifier string
+     *
+     * @see DB_common::quoteIdentifier()
+     * @since Method available since Release 1.6.0
+     */
+    function quoteIdentifier($str)
+    {
+        switch ($this->dsn['dbsyntax']) {
+            case 'access':
+                return '[' . $str . ']';
+            case 'mssql':
+            case 'sybase':
+                return '[' . str_replace(']', ']]', $str) . ']';
+            case 'mysql':
+            case 'mysqli':
+                return '`' . $str . '`';
+            default:
+                return '"' . str_replace('"', '""', $str) . '"';
+        }
+    }
+
+    // }}}
+    // {{{ quote()
+
+    /**
+     * @deprecated  Deprecated in release 1.6.0
+     * @internal
+     */
+    function quote($str)
+    {
+        return $this->quoteSmart($str);
+    }
+
+    // }}}
+    // {{{ nextId()
+
+    /**
+     * Returns the next free id in a sequence
+     *
+     * @param string  $seq_name  name of the sequence
+     * @param boolean $ondemand  when true, the seqence is automatically
+     *                            created if it does not exist
+     *
+     * @return int  the next id number in the sequence.
+     *               A DB_Error object on failure.
+     *
+     * @see DB_common::nextID(), DB_common::getSequenceName(),
+     *      DB_odbc::createSequence(), DB_odbc::dropSequence()
+     */
+    function nextId($seq_name, $ondemand = true)
+    {
+        $seqname = $this->getSequenceName($seq_name);
+        $repeat = 0;
+        do {
+            $this->pushErrorHandling(PEAR_ERROR_RETURN);
+            $result = $this->query("update ${seqname} set id = id + 1");
+            $this->popErrorHandling();
+            if ($ondemand && DB::isError($result) &&
+                $result->getCode() == DB_ERROR_NOSUCHTABLE) {
+                $repeat = 1;
+                $this->pushErrorHandling(PEAR_ERROR_RETURN);
+                $result = $this->createSequence($seq_name);
+                $this->popErrorHandling();
+                if (DB::isError($result)) {
+                    return $this->raiseError($result);
+                }
+                $result = $this->query("insert into ${seqname} (id) values(0)");
+            } else {
+                $repeat = 0;
+            }
+        } while ($repeat);
+
+        if (DB::isError($result)) {
+            return $this->raiseError($result);
+        }
+
+        $result = $this->query("select id from ${seqname}");
+        if (DB::isError($result)) {
+            return $result;
+        }
+
+        $row = $result->fetchRow(DB_FETCHMODE_ORDERED);
+        if (DB::isError($row || !$row)) {
+            return $row;
+        }
+
+        return $row[0];
+    }
+
+    /**
+     * Creates a new sequence
+     *
+     * @param string $seq_name  name of the new sequence
+     *
+     * @return int  DB_OK on success.  A DB_Error object on failure.
+     *
+     * @see DB_common::createSequence(), DB_common::getSequenceName(),
+     *      DB_odbc::nextID(), DB_odbc::dropSequence()
+     */
+    function createSequence($seq_name)
+    {
+        return $this->query('CREATE TABLE '
+                            . $this->getSequenceName($seq_name)
+                            . ' (id integer NOT NULL,'
+                            . ' PRIMARY KEY(id))');
+    }
+
+    // }}}
+    // {{{ dropSequence()
+
+    /**
+     * Deletes a sequence
+     *
+     * @param string $seq_name  name of the sequence to be deleted
+     *
+     * @return int  DB_OK on success.  A DB_Error object on failure.
+     *
+     * @see DB_common::dropSequence(), DB_common::getSequenceName(),
+     *      DB_odbc::nextID(), DB_odbc::createSequence()
+     */
+    function dropSequence($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)
+    {
+        if (!@odbc_autocommit($this->connection, $onoff)) {
+            return $this->odbcRaiseError();
+        }
+        return DB_OK;
+    }
+
+    // }}}
+    // {{{ commit()
+
+    /**
+     * Commits the current transaction
+     *
+     * @return int  DB_OK on success.  A DB_Error object on failure.
+     */
+    function commit()
+    {
+        if (!@odbc_commit($this->connection)) {
+            return $this->odbcRaiseError();
+        }
+        return DB_OK;
+    }
+
+    // }}}
+    // {{{ rollback()
+
+    /**
+     * Reverts the current transaction
+     *
+     * @return int  DB_OK on success.  A DB_Error object on failure.
+     */
+    function rollback()
+    {
+        if (!@odbc_rollback($this->connection)) {
+            return $this->odbcRaiseError();
+        }
+        return DB_OK;
+    }
+
+    // }}}
+    // {{{ odbcRaiseError()
+
+    /**
+     * Produces a DB_Error object regarding the current problem
+     *
+     * @param int $errno  if the error is being manually raised pass a
+     *                     DB_ERROR* constant here.  If this isn't passed
+     *                     the error information gathered from the DBMS.
+     *
+     * @return object  the DB_Error object
+     *
+     * @see DB_common::raiseError(),
+     *      DB_odbc::errorNative(), DB_common::errorCode()
+     */
+    function odbcRaiseError($errno = null)
+    {
+        if ($errno === null) {
+            switch ($this->dbsyntax) {
+                case 'access':
+                    if ($this->options['portability'] & DB_PORTABILITY_ERRORS) {
+                        $this->errorcode_map['07001'] = DB_ERROR_NOSUCHFIELD;
+                    } else {
+                        // Doing this in case mode changes during runtime.
+                        $this->errorcode_map['07001'] = DB_ERROR_MISMATCH;
+                    }
+
+                    $native_code = odbc_error($this->connection);
+
+                    // S1000 is for "General Error."  Let's be more specific.
+                    if ($native_code == 'S1000') {
+                        $errormsg = odbc_errormsg($this->connection);
+                        static $error_regexps;
+                        if (!isset($error_regexps)) {
+                            $error_regexps = array(
+                                '/includes related records.$/i'  => DB_ERROR_CONSTRAINT,
+                                '/cannot contain a Null value/i' => DB_ERROR_CONSTRAINT_NOT_NULL,
+                            );
+                        }
+                        foreach ($error_regexps as $regexp => $code) {
+                            if (preg_match($regexp, $errormsg)) {
+                                return $this->raiseError($code,
+                                        null, null, null,
+                                        $native_code . ' ' . $errormsg);
+                            }
+                        }
+                        $errno = DB_ERROR;
+                    } else {
+                        $errno = $this->errorCode($native_code);
+                    }
+                    break;
+                default:
+                    $errno = $this->errorCode(odbc_error($this->connection));
+            }
+        }
+        return $this->raiseError($errno, null, null, null,
+                                 $this->errorNative());
+    }
+
+    // }}}
+    // {{{ errorNative()
+
+    /**
+     * Gets the DBMS' native error code and message produced by the last query
+     *
+     * @return string  the DBMS' error code and message
+     */
+    function errorNative()
+    {
+        if (!is_resource($this->connection)) {
+            return @odbc_error() . ' ' . @odbc_errormsg();
+        }
+        return @odbc_error($this->connection) . ' ' . @odbc_errormsg($this->connection);
+    }
+
+    // }}}
+    // {{{ tableInfo()
+
+    /**
+     * Returns information about a table or a result set
+     *
+     * @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            $mode    a valid tableInfo mode
+     *
+     * @return array  an associative array with the information requested.
+     *                 A DB_Error object on failure.
+     *
+     * @see DB_common::tableInfo()
+     * @since Method available since Release 1.7.0
+     */
+    function tableInfo($result, $mode = null)
+    {
+        if (is_string($result)) {
+            /*
+             * Probably received a table name.
+             * Create a result resource identifier.
+             */
+            $id = @odbc_exec($this->connection, "SELECT * FROM $result");
+            if (!$id) {
+                return $this->odbcRaiseError();
+            }
+            $got_string = true;
+        } elseif (isset($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 $this->odbcRaiseError(DB_ERROR_NEED_MORE_DATA);
+        }
+
+        if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
+            $case_func = 'strtolower';
+        } else {
+            $case_func = 'strval';
+        }
+
+        $count = @odbc_num_fields($id);
+        $res   = array();
+
+        if ($mode) {
+            $res['num_fields'] = $count;
+        }
+
+        for ($i = 0; $i < $count; $i++) {
+            $col = $i + 1;
+            $res[$i] = array(
+                'table' => $got_string ? $case_func($result) : '',
+                'name'  => $case_func(@odbc_field_name($id, $col)),
+                'type'  => @odbc_field_type($id, $col),
+                'len'   => @odbc_field_len($id, $col),
+                'flags' => '',
+            );
+            if ($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) {
+            @odbc_free_result($id);
+        }
+        return $res;
+    }
+
+    // }}}
+    // {{{ getSpecialQuery()
+
+    /**
+     * Obtains the query string needed for listing a given type of objects
+     *
+     * Thanks to symbol1@gmail.com and Philippe.Jausions@11abacus.com.
+     *
+     * @param string $type  the kind of objects you want to retrieve
+     *
+     * @return string  the list of objects requested
+     *
+     * @access protected
+     * @see DB_common::getListOf()
+     * @since Method available since Release 1.7.0
+     */
+    function getSpecialQuery($type)
+    {
+        switch ($type) {
+            case 'databases':
+                if (!function_exists('odbc_data_source')) {
+                    return null;
+                }
+                $res = @odbc_data_source($this->connection, SQL_FETCH_FIRST);
+                if (is_array($res)) {
+                    $out = array($res['server']);
+                    while($res = @odbc_data_source($this->connection,
+                                                   SQL_FETCH_NEXT))
+                    {
+                        $out[] = $res['server'];
+                    }
+                    return $out;
+                } else {
+                    return $this->odbcRaiseError();
+                }
+                break;
+            case 'tables':
+            case 'schema.tables':
+                $keep = 'TABLE';
+                break;
+            case 'views':
+                $keep = 'VIEW';
+                break;
+            default:
+                return null;
+        }
+
+        /*
+         * Removing non-conforming items in the while loop rather than
+         * in the odbc_tables() call because some backends choke on this:
+         *     odbc_tables($this->connection, '', '', '', 'TABLE')
+         */
+        $res  = @odbc_tables($this->connection);
+        if (!$res) {
+            return $this->odbcRaiseError();
+        }
+        $out = array();
+        while ($row = odbc_fetch_array($res)) {
+            if ($row['TABLE_TYPE'] != $keep) {
+                continue;
+            }
+            if ($type == 'schema.tables') {
+                $out[] = $row['TABLE_SCHEM'] . '.' . $row['TABLE_NAME'];
+            } else {
+                $out[] = $row['TABLE_NAME'];
+            }
+        }
+        return $out;
+    }
+
+    // }}}
+
+}
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ */
+
+?>