diff --git a/dibi/libs/DibiConnection.php b/dibi/libs/DibiConnection.php
index 6572a3d2..885c3be0 100644
--- a/dibi/libs/DibiConnection.php
+++ b/dibi/libs/DibiConnection.php
@@ -242,12 +242,8 @@ class DibiConnection extends DibiObject
 	{
 		$args = func_get_args();
 		$this->connect();
-		$trans = new DibiTranslator($this->driver);
-		if ($trans->translate($args)) {
-			return $this->nativeQuery($trans->sql);
-		} else {
-			throw new DibiException('SQL translate error: ' . $trans->sql);
-		}
+		$translator = new DibiTranslator($this->driver);
+		return $this->nativeQuery($translator->translate($args));
 	}
 
 
@@ -262,12 +258,8 @@ class DibiConnection extends DibiObject
 	{
 		$args = func_get_args();
 		$this->connect();
-		$trans = new DibiTranslator($this->driver);
-		if ($trans->translate($args)) {
-			return $trans->sql;
-		} else {
-			throw new DibiException('SQL translate error: ' . $trans->sql);
-		}
+		$translator = new DibiTranslator($this->driver);
+		return $translator->translate($args);
 	}
 
 
@@ -281,10 +273,31 @@ class DibiConnection extends DibiObject
 	{
 		$args = func_get_args();
 		$this->connect();
-		$trans = new DibiTranslator($this->driver);
-		$ok = $trans->translate($args);
-		dibi::dump($trans->sql);
-		return $ok;
+		try {
+			$translator = new DibiTranslator($this->driver);
+			dibi::dump($translator->translate($args));
+			return TRUE;
+
+		} catch (DibiException $e) {
+			dibi::dump($e->getSql());
+			return FALSE;
+		}
+	}
+
+
+
+	/**
+	 * Generates (translates) and returns SQL query as DibiDataSource.
+	 * @param  array|mixed      one or more arguments
+	 * @return DibiDataSource
+	 * @throws DibiException
+	 */
+	final public function dataSource($args)
+	{
+		$args = func_get_args();
+		$this->connect();
+		$translator = new DibiTranslator($this->driver);
+		return new DibiDataSource($translator->translate($args), $this);
 	}
 
 
diff --git a/dibi/libs/DibiDataSource.php b/dibi/libs/DibiDataSource.php
index 8b328b18..20ad30e6 100644
--- a/dibi/libs/DibiDataSource.php
+++ b/dibi/libs/DibiDataSource.php
@@ -20,26 +20,12 @@
 
 
 
-/**
- * Provides an interface between a dataset and data-aware components.
- * @package dibi
- * @deprecated
- */
-interface IDataSource extends Countable, IteratorAggregate
-{
-	//function IteratorAggregate::getIterator();
-	//function Countable::count();
-}
-
-
-
 /**
  * Default implementation of IDataSource for dibi.
  *
  * @author     David Grudl
  * @copyright  Copyright (c) 2005, 2009 David Grudl
  * @package    dibi
- * @deprecated
  */
 class DibiDataSource extends DibiObject implements IDataSource
 {
diff --git a/dibi/libs/DibiException.php b/dibi/libs/DibiException.php
index 70524b4b..27ae3848 100644
--- a/dibi/libs/DibiException.php
+++ b/dibi/libs/DibiException.php
@@ -27,31 +27,14 @@
  * @copyright  Copyright (c) 2005, 2009 David Grudl
  * @package    dibi
  */
-class DibiException extends Exception
+class DibiException extends Exception implements /*Nette\*/IDebuggable
 {
-}
-
-
-
-
-/**
- * database server exception.
- *
- * @author     David Grudl
- * @copyright  Copyright (c) 2005, 2009 David Grudl
- * @package    dibi
- */
-class DibiDriverException extends DibiException implements /*Nette\*/IDebuggable
-{
-	/** @var string */
-	private static $errorMsg;
-
 	/** @var string */
 	private $sql;
 
 
 	/**
-	 * Construct an dibi driver exception.
+	 * Construct an dibi exception.
 	 * @param string  Message describing the exception
 	 * @param int     Some code
 	 * @param  string SQL command
@@ -104,12 +87,30 @@ class DibiDriverException extends DibiException implements /*Nette\*/IDebuggable
 		return $panels;
 	}
 
+}
 
 
+
+
+/**
+ * database server exception.
+ *
+ * @author     David Grudl
+ * @copyright  Copyright (c) 2005, 2009 David Grudl
+ * @package    dibi
+ */
+class DibiDriverException extends DibiException
+{
+
 	/********************* error catching ****************d*g**/
 
 
 
+	/** @var string */
+	private static $errorMsg;
+
+
+
 	/**
 	 * Starts catching potential errors/warnings
 	 * @return void
diff --git a/dibi/libs/DibiFluent.php b/dibi/libs/DibiFluent.php
index 8259986b..2f28a16e 100644
--- a/dibi/libs/DibiFluent.php
+++ b/dibi/libs/DibiFluent.php
@@ -27,7 +27,7 @@
  * @copyright  Copyright (c) 2005, 2009 David Grudl
  * @package    dibi
  */
-class DibiFluent extends DibiObject implements Countable, IteratorAggregate
+class DibiFluent extends DibiObject implements IDataSource
 {
 	/** @var array */
 	public static $masks = array(
@@ -133,7 +133,7 @@ class DibiFluent extends DibiObject implements Countable, IteratorAggregate
 				} elseif (is_string(key($arg))) { // associative array
 					$args = array('%a', $arg);
 				}
-			}
+			} // case $arg === FALSE is handled below
 		}
 
 		if (array_key_exists($clause, $this->clauses)) {
@@ -413,6 +413,16 @@ class DibiFluent extends DibiObject implements Countable, IteratorAggregate
 
 
 
+	/**
+	 * @return DibiDataSource
+	 */
+	public function toDataSource()
+	{
+		return new DibiDataSource($this->connection->sql($this->_export()), $this->connection);
+	}
+
+
+
 	/**
 	 * Returns SQL query.
 	 * @return string
diff --git a/dibi/libs/DibiResult.php b/dibi/libs/DibiResult.php
index fb25350e..6d2e1430 100644
--- a/dibi/libs/DibiResult.php
+++ b/dibi/libs/DibiResult.php
@@ -40,7 +40,7 @@
  * @copyright  Copyright (c) 2005, 2009 David Grudl
  * @package    dibi
  */
-class DibiResult extends DibiObject implements Countable, IteratorAggregate
+class DibiResult extends DibiObject implements IDataSource
 {
 	/** @var array  IDibiDriver */
 	private $driver;
diff --git a/dibi/libs/DibiTranslator.php b/dibi/libs/DibiTranslator.php
index 43d79272..0b249693 100644
--- a/dibi/libs/DibiTranslator.php
+++ b/dibi/libs/DibiTranslator.php
@@ -29,9 +29,6 @@
  */
 final class DibiTranslator extends DibiObject
 {
-	/** @var string */
-	public $sql;
-
 	/** @var IDibiDriver */
 	private $driver;
 
@@ -81,7 +78,8 @@ final class DibiTranslator extends DibiObject
 	/**
 	 * Generates SQL.
 	 * @param  array
-	 * @return bool
+	 * @return string
+	 * @throws DibiException
 	 */
 	public function translate(array $args)
 	{
@@ -174,13 +172,16 @@ final class DibiTranslator extends DibiObject
 
 		$sql = implode(' ', $sql);
 
+		if ($this->hasError) {
+			throw new DibiException('SQL translate error', 0, $sql);
+		}
+
 		// apply limit
 		if ($this->limit > -1 || $this->offset > 0) {
 			$this->driver->applyLimit($sql, $this->limit, $this->offset);
 		}
 
-		$this->sql = $sql;
-		return !$this->hasError;
+		return $sql;
 	}
 
 
@@ -197,15 +198,14 @@ final class DibiTranslator extends DibiObject
 		if (is_array($value) || $value instanceof ArrayObject) {
 
 			$vx = $kx = array();
-			$operator = ', ';
 			switch ($modifier) {
 			case 'and':
 			case 'or':  // key=val AND key IS NULL AND ...
-				$operator = ' ' . strtoupper($modifier) . ' ';
 				if (empty($value)) {
 					return '1';
+				}
 
-				} else foreach ($value as $k => $v) {
+				foreach ($value as $k => $v) {
 					if (is_string($k)) {
 						$pair = explode('%', $k, 2); // split into identifier & modifier
 						$k = $this->delimite($pair[0]) . ' ';
@@ -225,12 +225,12 @@ final class DibiTranslator extends DibiObject
 						$vx[] = $this->formatValue($v, 'sql');
 					}
 				}
-				return implode($operator, $vx);
+				return implode(' ' . strtoupper($modifier) . ' ', $vx);
 
 			case 'n':  // identifier names
 				foreach ($value as $k => $v) {
 					if (is_string($k)) {
-						$vx[] = $this->delimite($k) . ' AS ' . $v;
+						$vx[] = $this->delimite($k) . (empty($v) ? '' : ' AS ' . $v);
 					} else {
 						$vx[] = $this->delimite($v);
 					}
@@ -244,7 +244,7 @@ final class DibiTranslator extends DibiObject
 					$vx[] = $this->delimite($pair[0]) . '='
 						. $this->formatValue($v, isset($pair[1]) ? $pair[1] : FALSE);
 				}
-				return implode($operator, $vx);
+				return implode(', ', $vx);
 
 
 			case 'l': // (val, val, ...)
@@ -276,8 +276,7 @@ final class DibiTranslator extends DibiObject
 
 			case 'sql':
 				$translator = new self($this->driver);
-				$translator->translate($value);
-				return $translator->sql;
+				return $translator->translate($value);
 
 			default:  // value, value, value - all with the same modifier
 				foreach ($value as $v) {
@@ -357,7 +356,6 @@ final class DibiTranslator extends DibiObject
 			case 'a':
 			case 'l':
 			case 'v':
-			case 'by':
 				$this->hasError = TRUE;
 				return '**Unexpected type ' . gettype($value) . '**';
 
diff --git a/dibi/libs/interfaces.php b/dibi/libs/interfaces.php
index 36a6e6c1..03155c48 100644
--- a/dibi/libs/interfaces.php
+++ b/dibi/libs/interfaces.php
@@ -39,6 +39,20 @@ interface IDibiVariable
 
 
 
+/**
+ * Provides an interface between a dataset and data-aware components.
+ * @package dibi
+ */
+interface IDataSource extends Countable, IteratorAggregate
+{
+	//function IteratorAggregate::getIterator($offset = NULL, $limit = NULL);
+	//function Countable::count();
+}
+
+
+
+
+
 /**
  * Defines method that must profiler implement.
  * @package dibi