--- /dev/null
+<?php defined('SYSPATH') OR die('No direct access allowed.');
+/**
+ * MSSQL Database Driver
+ *
+ * @package Core
+ * @author Kohana Team
+ * @copyright (c) 2007-2008 Kohana Team
+ * @license http://kohanaphp.com/license.html
+ */
+class Database_Mssql_Driver extends Database_Driver
+{
+ /**
+ * Database connection link
+ */
+ protected $link;
+
+ /**
+ * Database configuration
+ */
+ protected $db_config;
+
+ /**
+ * Sets the config for the class.
+ *
+ * @param array database configuration
+ */
+ public function __construct($config)
+ {
+ $this->db_config = $config;
+
+ Kohana::log('debug', 'MSSQL Database Driver Initialized');
+ }
+
+ /**
+ * Closes the database connection.
+ */
+ public function __destruct()
+ {
+ is_resource($this->link) and mssql_close($this->link);
+ }
+
+ /**
+ * Make the connection
+ *
+ * @return return connection
+ */
+ public function connect()
+ {
+ // Check if link already exists
+ if (is_resource($this->link))
+ return $this->link;
+
+ // Import the connect variables
+ extract($this->db_config['connection']);
+
+ // Persistent connections enabled?
+ $connect = ($this->db_config['persistent'] == TRUE) ? 'mssql_pconnect' : 'mssql_connect';
+
+ // Build the connection info
+ $host = isset($host) ? $host : $socket;
+
+ // Windows uses a comma instead of a colon
+ $port = (isset($port) AND is_string($port)) ? (KOHANA_IS_WIN ? ',' : ':').$port : '';
+
+ // Make the connection and select the database
+ if (($this->link = $connect($host.$port, $user, $pass, TRUE)) AND mssql_select_db($database, $this->link))
+ {
+ /* This is being removed so I can use it, will need to come up with a more elegant workaround in the future...
+ *
+ if ($charset = $this->db_config['character_set'])
+ {
+ $this->set_charset($charset);
+ }
+ */
+
+ // Clear password after successful connect
+ $this->db_config['connection']['pass'] = NULL;
+
+ return $this->link;
+ }
+
+ return FALSE;
+ }
+
+ public function query($sql)
+ {
+ // Only cache if it's turned on, and only cache if it's not a write statement
+ if ($this->db_config['cache'] AND ! preg_match('#\b(?:INSERT|UPDATE|REPLACE|SET)\b#i', $sql))
+ {
+ $hash = $this->query_hash($sql);
+
+ if ( ! isset($this->query_cache[$hash]))
+ {
+ // Set the cached object
+ $this->query_cache[$hash] = new Mssql_Result(mssql_query($sql, $this->link), $this->link, $this->db_config['object'], $sql);
+ }
+ else
+ {
+ // Rewind cached result
+ $this->query_cache[$hash]->rewind();
+ }
+
+ // Return the cached query
+ return $this->query_cache[$hash];
+ }
+
+ return new Mssql_Result(mssql_query($sql, $this->link), $this->link, $this->db_config['object'], $sql);
+ }
+
+ public function escape_table($table)
+ {
+ if (stripos($table, ' AS ') !== FALSE)
+ {
+ // Force 'AS' to uppercase
+ $table = str_ireplace(' AS ', ' AS ', $table);
+
+ // Runs escape_table on both sides of an AS statement
+ $table = array_map(array($this, __FUNCTION__), explode(' AS ', $table));
+
+ // Re-create the AS statement
+ return implode(' AS ', $table);
+ }
+ return '['.str_replace('.', '[.]', $table).']';
+ }
+
+ public function escape_column($column)
+ {
+ if (!$this->db_config['escape'])
+ return $column;
+
+ if ($column == '*')
+ return $column;
+
+ // This matches any functions we support to SELECT.
+ if ( preg_match('/(avg|count|sum|max|min)\(\s*(.*)\s*\)(\s*as\s*(.+)?)?/i', $column, $matches))
+ {
+ if ( count($matches) == 3)
+ {
+ return $matches[1].'('.$this->escape_column($matches[2]).')';
+ }
+ else if ( count($matches) == 5)
+ {
+ return $matches[1].'('.$this->escape_column($matches[2]).') AS '.$this->escape_column($matches[2]);
+ }
+ }
+
+ // This matches any modifiers we support to SELECT.
+ if ( ! preg_match('/\b(?:rand|all|distinct(?:row)?|high_priority|sql_(?:small_result|b(?:ig_result|uffer_result)|no_cache|ca(?:che|lc_found_rows)))\s/i', $column))
+ {
+ if (stripos($column, ' AS ') !== FALSE)
+ {
+ // Force 'AS' to uppercase
+ $column = str_ireplace(' AS ', ' AS ', $column);
+
+ // Runs escape_column on both sides of an AS statement
+ $column = array_map(array($this, __FUNCTION__), explode(' AS ', $column));
+
+ // Re-create the AS statement
+ return implode(' AS ', $column);
+ }
+
+ return preg_replace('/[^.*]+/', '[$0]', $column);
+ }
+
+ $parts = explode(' ', $column);
+ $column = '';
+
+ for ($i = 0, $c = count($parts); $i < $c; $i++)
+ {
+ // The column is always last
+ if ($i == ($c - 1))
+ {
+ $column .= preg_replace('/[^.*]+/', '[$0]', $parts[$i]);
+ }
+ else // otherwise, it's a modifier
+ {
+ $column .= $parts[$i].' ';
+ }
+ }
+ return $column;
+ }
+
+ /**
+ * Limit in SQL Server 2000 only uses the keyword
+ * 'TOP'; 2007 may have an offset keyword, but
+ * I am unsure - for pagination style limit,offset
+ * functionality, a fancy query needs to be built.
+ *
+ * @param unknown_type $limit
+ * @return unknown
+ */
+ public function limit($limit, $offset=null)
+ {
+ return 'TOP '.$limit;
+ }
+
+ public function compile_select($database)
+ {
+ $sql = ($database['distinct'] == TRUE) ? 'SELECT DISTINCT ' : 'SELECT ';
+ $sql .= (count($database['select']) > 0) ? implode(', ', $database['select']) : '*';
+
+ if (count($database['from']) > 0)
+ {
+ // Escape the tables
+ $froms = array();
+ foreach ($database['from'] as $from)
+ $froms[] = $this->escape_column($from);
+ $sql .= "\nFROM ";
+ $sql .= implode(', ', $froms);
+ }
+
+ if (count($database['join']) > 0)
+ {
+ foreach($database['join'] AS $join)
+ {
+ $sql .= "\n".$join['type'].'JOIN '.implode(', ', $join['tables']).' ON '.$join['conditions'];
+ }
+ }
+
+ if (count($database['where']) > 0)
+ {
+ $sql .= "\nWHERE ";
+ }
+
+ $sql .= implode("\n", $database['where']);
+
+ if (count($database['groupby']) > 0)
+ {
+ $sql .= "\nGROUP BY ";
+ $sql .= implode(', ', $database['groupby']);
+ }
+
+ if (count($database['having']) > 0)
+ {
+ $sql .= "\nHAVING ";
+ $sql .= implode("\n", $database['having']);
+ }
+
+ if (count($database['orderby']) > 0)
+ {
+ $sql .= "\nORDER BY ";
+ $sql .= implode(', ', $database['orderby']);
+ }
+
+ if (is_numeric($database['limit']))
+ {
+ $sql .= "\n";
+ $sql .= $this->limit($database['limit']);
+ }
+
+ return $sql;
+ }
+
+ public function escape_str($str)
+ {
+ if (!$this->db_config['escape'])
+ return $str;
+
+ is_resource($this->link) or $this->connect();
+ //mssql_real_escape_string($str, $this->link); <-- this function doesn't exist
+
+ $characters = array('/\x00/', '/\x1a/', '/\n/', '/\r/', '/\\\/', '/\'/');
+ $replace = array('\\\x00', '\\x1a', '\\n', '\\r', '\\\\', "''");
+ return preg_replace($characters, $replace, $str);
+ }
+
+ public function list_tables()
+ {
+ $sql = 'SHOW TABLES FROM ['.$this->db_config['connection']['database'].']';
+ $result = $this->query($sql)->result(FALSE, MSSQL_ASSOC);
+
+ $retval = array();
+ foreach ($result as $row)
+ {
+ $retval[] = current($row);
+ }
+
+ return $retval;
+ }
+
+ public function show_error()
+ {
+ return mssql_get_last_message($this->link);
+ }
+
+ public function list_fields($table)
+ {
+ $result = array();
+
+ foreach ($this->field_data($table) as $row)
+ {
+ // Make an associative array
+ $result[$row->Field] = $this->sql_type($row->Type);
+ }
+
+ return $result;
+ }
+
+ public function field_data($table)
+ {
+ $query = $this->query("SELECT COLUMN_NAME AS Field, DATA_TYPE as Type FROM INFORMATION_SCHEMA.Columns WHERE TABLE_NAME = '".$this->escape_table($table)."'", $this->link);
+
+ return $query->result_array(TRUE);
+ }
+}
+
+/**
+ * MSSQL Result
+ */
+class Mssql_Result extends Database_Result {
+
+ // Fetch function and return type
+ protected $fetch_type = 'mssql_fetch_object';
+ protected $return_type = MSSQL_ASSOC;
+
+ /**
+ * Sets up the result variables.
+ *
+ * @param resource query result
+ * @param resource database link
+ * @param boolean return objects or arrays
+ * @param string SQL query that was run
+ */
+ public function __construct($result, $link, $object = TRUE, $sql)
+ {
+ $this->result = $result;
+
+ // If the query is a resource, it was a SELECT, SHOW, DESCRIBE, EXPLAIN query
+ if (is_resource($result))
+ {
+ $this->current_row = 0;
+ $this->total_rows = mssql_num_rows($this->result);
+ $this->fetch_type = ($object === TRUE) ? 'mssql_fetch_object' : 'mssql_fetch_array';
+ }
+ elseif (is_bool($result))
+ {
+ if ($result == FALSE)
+ {
+ // SQL error
+ throw new Kohana_Database_Exception('database.error', mssql_get_last_message($link).' - '.$sql);
+ }
+ else
+ {
+ // Its an DELETE, INSERT, REPLACE, or UPDATE querys
+ $last_id = mssql_query('SELECT @@IDENTITY AS last_id', $link);
+ $result = mssql_fetch_assoc($last_id);
+ $this->insert_id = $result['last_id'];
+ $this->total_rows = mssql_rows_affected($link);
+ }
+ }
+
+ // Set result type
+ $this->result($object);
+
+ // Store the SQL
+ $this->sql = $sql;
+ }
+
+ /**
+ * Destruct, the cleanup crew!
+ */
+ public function __destruct()
+ {
+ if (is_resource($this->result))
+ {
+ mssql_free_result($this->result);
+ }
+ }
+
+ public function result($object = TRUE, $type = MSSQL_ASSOC)
+ {
+ $this->fetch_type = ((bool) $object) ? 'mssql_fetch_object' : 'mssql_fetch_array';
+
+ // This check has to be outside the previous statement, because we do not
+ // know the state of fetch_type when $object = NULL
+ // NOTE - The class set by $type must be defined before fetching the result,
+ // autoloading is disabled to save a lot of stupid overhead.
+ if ($this->fetch_type == 'mssql_fetch_object')
+ {
+ $this->return_type = (is_string($type) AND Kohana::auto_load($type)) ? $type : 'stdClass';
+ }
+ else
+ {
+ $this->return_type = $type;
+ }
+
+ return $this;
+ }
+
+ public function as_array($object = NULL, $type = MSSQL_ASSOC)
+ {
+ return $this->result_array($object, $type);
+ }
+
+ public function result_array($object = NULL, $type = MSSQL_ASSOC)
+ {
+ $rows = array();
+
+ if (is_string($object))
+ {
+ $fetch = $object;
+ }
+ elseif (is_bool($object))
+ {
+ if ($object === TRUE)
+ {
+ $fetch = 'mssql_fetch_object';
+
+ // NOTE - The class set by $type must be defined before fetching the result,
+ // autoloading is disabled to save a lot of stupid overhead.
+ $type = (is_string($type) AND Kohana::auto_load($type)) ? $type : 'stdClass';
+ }
+ else
+ {
+ $fetch = 'mssql_fetch_array';
+ }
+ }
+ else
+ {
+ // Use the default config values
+ $fetch = $this->fetch_type;
+
+ if ($fetch == 'mssql_fetch_object')
+ {
+ $type = (is_string($type) AND Kohana::auto_load($type)) ? $type : 'stdClass';
+ }
+ }
+
+ if (mssql_num_rows($this->result))
+ {
+ // Reset the pointer location to make sure things work properly
+ mssql_data_seek($this->result, 0);
+
+ while ($row = $fetch($this->result, $type))
+ {
+ $rows[] = $row;
+ }
+ }
+
+ return isset($rows) ? $rows : array();
+ }
+
+ public function list_fields()
+ {
+ $field_names = array();
+ while ($field = mssql_fetch_field($this->result))
+ {
+ $field_names[] = $field->name;
+ }
+
+ return $field_names;
+ }
+
+ public function seek($offset)
+ {
+ if ( ! $this->offsetExists($offset))
+ return FALSE;
+
+ return mssql_data_seek($this->result, $offset);
+ }
+
+} // End mssql_Result Class
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