DQL Parser refactorings and enhancements. Finished basic drat of Join support.

lib/Doctrine/Entity.php

@@ -23,7 +23,7 @@
 
 /**
  * Base class for all Entities (objects with persistent state in a RDBMS that are
- * managed by Doctrine). Kind of a Layer Suptertype.
+ * managed by Doctrine). Kind of a Layer Supertype.
  * 
  * NOTE: Methods that are intended for internal use only but must be public
  * are marked INTERNAL: and begin with an underscore "_" to indicate that they

lib/Doctrine/Query/AbstractResult.php

@@ -123,7 +123,7 @@ abstract class Doctrine_Query_AbstractResult
      */
     public function getQueryComponent($componentAlias)
     {
-        if ( ! isset($this->_queryComponents[$componentAlias])) {
+        if ( ! array_key_exists($componentAlias, $this->_queryComponents)) {
             throw new Doctrine_Query_Exception('Unknown query component ' . $componentAlias);
         }
 

lib/Doctrine/Query/Parser.php

@@ -173,7 +173,9 @@ class Doctrine_Query_Parser
 
 
     /**
-     * @todo [TODO] Document these!
+     * Moves the parser scanner to next token
+     *
+     * @return void
      */
     public function next()
     {

lib/Doctrine/Query/Production/BetweenExpression.php

@@ -66,30 +66,20 @@ class Doctrine_Query_Production_BetweenExpression extends Doctrine_Query_Product
              . $this->_fromExpression->buildSql() . ' AND ' . $this->_toExpression->buildSql();
     }
 
-    /**
-     * Visitor support.
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        $this->_fromExpression->accept($visitor);
-        $this->_toExpression->accept($visitor);
-        $visitor->visitBetweenExpression($this);
-    }
 
     /* Getters */
-    
     public function isNot()
     {
         return $this->_not;
     }
 
+
     public function getFromExpression()
     {
         return $this->_fromExpression;
     }
 
+
     public function getToExpression()
     {
         return $this->_toExpression;

lib/Doctrine/Query/Production/ComparisonExpression.php

@@ -24,6 +24,7 @@
  *
  * @package     Doctrine
  * @subpackage  Query
+ * @author      Guilherme Blanco <guilhermeblanco@hotmail.com>
  * @author      Janne Vanhala <jpvanhal@cc.hut.fi>
  * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
  * @link        http://www.phpdoctrine.org
@@ -72,29 +73,20 @@ class Doctrine_Query_Production_ComparisonExpression extends Doctrine_Query_Prod
         );
     }
 
-    /**
-     * Visitor support.
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        $this->_expression->accept($visitor);
-        $visitor->visitComparisonExpression($this);
-    }
 
     /* Getters */
-    
     public function getOperator()
     {
         return $this->_operator;
     }
 
+
     public function getExpression()
     {
         return $this->_expression;
     }
 
+
     public function isSubselect()
     {
         return $this->_isSubselect;

lib/Doctrine/Query/Production/ComparisonOperator.php

@@ -24,6 +24,7 @@
  *
  * @package     Doctrine
  * @subpackage  Query
+ * @author      Guilherme Blanco <guilhermeblanco@hotmail.com>
  * @author      Janne Vanhala <jpvanhal@cc.hut.fi>
  * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
  * @link        http://www.phpdoctrine.org
@@ -78,14 +79,4 @@ class Doctrine_Query_Production_ComparisonOperator extends Doctrine_Query_Produc
             break;
         }
     }
-    
-    /**
-     * Visitor support.
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        $visitor->visitComparisonOperator($this);
-    }
 }

lib/Doctrine/Query/Production/ConditionalExpression.php

@@ -70,21 +70,8 @@ class Doctrine_Query_Production_ConditionalExpression extends Doctrine_Query_Pro
         return $value->buildSql();
     }
 
-    /**
-     * Visitor support.
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        foreach ($this->_conditionalTerms as $term) {
-            $term->accept($visitor);
-        }
-        $visitor->visitConditionalExpression($this);
-    }
 
     /* Getters */
-    
     public function getConditionalTerms()
     {
         return $this->_conditionalTerms;

lib/Doctrine/Query/Production/ConditionalFactor.php

@@ -61,19 +61,8 @@ class Doctrine_Query_Production_ConditionalFactor extends Doctrine_Query_Product
         return 'NOT ' . $this->_conditionalPrimary->buildSql();
     }
 
-    /**
-     * Visitor support
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        $this->_conditionalPrimary->accept($visitor);
-        $visitor->visitConditionalFactor($this);
-    }
 
     /* Getters */
-    
     public function getConditionalPrimary()
     {
         return $this->_conditionalPrimary;

lib/Doctrine/Query/Production/ConditionalPrimary.php

@@ -99,9 +99,10 @@ class Doctrine_Query_Production_ConditionalPrimary extends Doctrine_Query_Produc
         return false;
     }
 
-    public function accept($visitor)
+
+    /* Getters */
+    public function getConditionalExpression()
     {
-        $this->_conditionalExpression->accept($visitor);
+        return $this->_conditionalExpression;
-        $visitor->visitConditionalPrimary($this);
     }
 }

lib/Doctrine/Query/Production/ConditionalTerm.php

@@ -70,21 +70,8 @@ class Doctrine_Query_Production_ConditionalTerm extends Doctrine_Query_Productio
         return $value->buildSql();
     }
 
-    /**
-     * Visitor support
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        foreach ($this->_conditionalFactors as $factor) {
-            $factor->accept($visitor);
-        }
-        $visitor->visitConditionalTerm($this);
-    }
 
     /* Getters */
-    
     public function getConditionalFactors()
     {
         return $this->_conditionalFactors;

lib/Doctrine/Query/Production/ExistsExpression.php

@@ -52,19 +52,8 @@ class Doctrine_Query_Production_ExistsExpression extends Doctrine_Query_Producti
         return 'EXISTS (' . $this->_subselect->buildSql() . ')';
     }
 
-    /**
-     * Visitor support
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        $this->_subselect->accept($visitor);
-        $visitor->visitExistsExpression($this);
-    }
 
     /* Getters */
-    
     public function getSubselect()
     {
         return $this->_subselect;

lib/Doctrine/Query/Production/Expression.php

@@ -87,21 +87,8 @@ class Doctrine_Query_Production_Expression extends Doctrine_Query_Production
         return (is_string($value) ? $value : $value->buildSql());
     }
 
-    /**
-     * Visitor support
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        foreach ($this->_terms as $term) {
-            $term->accept($visitor);
-        }
-        $visitor->visitExpression($this);
-    }
 
     /* Getters */
-    
     public function getTerms()
     {
         return $this->_terms;

lib/Doctrine/Query/Production/FieldIdentificationVariable.php

@@ -24,6 +24,7 @@
  *
  * @package     Doctrine
  * @subpackage  Query
+ * @author      Guilherme Blanco <guilhermeblanco@hotmail.com>
  * @author      Janne Vanhala <jpvanhal@cc.hut.fi>
  * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
  * @link        http://www.phpdoctrine.org
@@ -75,23 +76,14 @@ class Doctrine_Query_Production_FieldIdentificationVariable extends Doctrine_Que
                             . Doctrine_Query_Production::SQLALIAS_SEPARATOR . $idx;
     }
 
-    /**
-     * Visitor support
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        $visitor->visitFieldIdentificationVariable($this);
-    }
 
     /* Getters */
-    
     public function getFieldAlias()
     {
         return $this->_fieldAlias;
     }
 
+
     public function getColumnAlias()
     {
         return $this->_columnAlias;

lib/Doctrine/Query/Production/FromClause.php

@@ -72,21 +72,8 @@ class Doctrine_Query_Production_FromClause extends Doctrine_Query_Production
         return $value->buildSql();
     }
 
-    /**
-     * Visitor support
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        foreach ($this->_identificationVariableDeclaration as $decl) {
-            $decl->accept($visitor);
-        }
-        $visitor->visitFromClause($this);
-    }
 
     /* Getters */
-    
     public function getIdentificationVariableDeclarations()
     {
         return $this->_identificationVariableDeclaration;

lib/Doctrine/Query/Production/IdentificationVariable.php

@@ -62,21 +62,4 @@ class Doctrine_Query_Production_IdentificationVariable extends Doctrine_Query_Pr
 
         return $this->_componentAlias;
     }
-    
-    /**
-     * Visitor support
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        $visitor->visitIdentificationVariable($this);
-    }
-    
-    /* Getters */
-    
-    public function getComponentAlias()
-    {
-        return $this->_componentAlias;
-    }
 }

lib/Doctrine/Query/Production/IdentificationVariableDeclaration.php

@@ -20,7 +20,7 @@
  */
 
 /**
- * IdentificationVariableDeclaration = RangeVariableDeclaration [IndexBy] {Join [IndexBy]}
+ * IdentificationVariableDeclaration = RangeVariableDeclaration [IndexBy] {JoinVariableDeclaration}
  *
  * @package     Doctrine
  * @subpackage  Query
@@ -37,7 +37,7 @@ class Doctrine_Query_Production_IdentificationVariableDeclaration extends Doctri
 
     protected $_indexBy;
 
-    protected $_relations = array();
+    protected $_joinVariableDeclarations = array();
 
 
     public function syntax($paramHolder)
@@ -45,7 +45,7 @@ class Doctrine_Query_Production_IdentificationVariableDeclaration extends Doctri
         $this->_rangeVariableDeclaration = $this->AST('RangeVariableDeclaration', $paramHolder);
 
         if ($this->_isNextToken(Doctrine_Query_Token::T_INDEX)) {
-            $paramHolder->set('componentAlias', $this->_rangeVariableDeclaration);
+            $paramHolder->set('componentAlias', $this->_rangeVariableDeclaration->getIdentificationVariable());
             $this->_indexBy = $this->AST('IndexBy', $paramHolder);
             $paramHolder->remove('componentAlias');
         }
@@ -55,75 +55,38 @@ class Doctrine_Query_Production_IdentificationVariableDeclaration extends Doctri
             $this->_isNextToken(Doctrine_Query_Token::T_INNER) ||
             $this->_isNextToken(Doctrine_Query_Token::T_JOIN)
         ) {
-            $i = count($this->_relations);
+            $this->_joinVariableDeclarations[] = $this->AST('JoinVariableDeclaration', $paramHolder);
-
-            $this->_relations[$i]['join'] = $this->AST('Join', $paramHolder);
-
-            if ($this->_isNextToken(Doctrine_Query_Token::T_INDEX)) {
-                $paramHolder->set('componentAlias', $this->_relations[$i]['join']->getRangeVariableDeclaration());
-                $this->_relations[$i]['indexBy'] = $this->AST('IndexBy', $paramHolder);
-                $paramHolder->remove('componentAlias');
-            }
         }
     }
 
 
     public function buildSql()
     {
-        // We need to bring the queryComponent and get things from there.
+        $str = $this->_rangeVariableDeclaration->buildSql();
-        $parserResult = $this->_parser->getParserResult();
-        $queryComponent = $parserResult->getQueryComponent($this->_rangeVariableDeclaration);
 
-        // Retrieving connection
+        for ($i = 0, $l = count($this->_joinVariableDeclarations); $i < $l; $i++) {
-        $conn = $this->_em->getConnection();
+            $str .= ' ' . $this->_joinVariableDeclarations[$i]->buildSql();
-
-        $str = $conn->quoteIdentifier($queryComponent['metadata']->getTableName()) . ' '
-             . $conn->quoteIdentifier($parserResult->getTableAliasFromComponentAlias($this->_rangeVariableDeclaration));
-
-        for ($i = 0, $l = count($this->_relations); $i < $l; $i++) {
-            $str .= $this->_relations[$i]['join']->buildSql() . ' '
-                  . ((isset($this->_relations[$i]['indexby'])) ? $this->_relations[$i]['indexby']->buildSql() . ' ' : '');
         }
 
         return $str;
     }
 
-    /**
-     * Visitor support
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        $this->_rangeVariableDeclaration->accept($visitor);
-        if ($this->_indexBy) {
-            $this->_indexBy->accept($visitor);
-        }
-        foreach ($this->_relations as $relation) {
-            if ($relation['join']) {
-                $relation['join']->accept($visitor);
-            }
-            if ($relation['indexby']) {
-                $relation['indexby']->accept($visitor);
-            }
-        }
-        $visitor->visitIdentificationVariable($this);
-    }
 
     /* Getters */
-    
     public function getRangeVariableDeclaration()
     {
         return $this->_rangeVariableDeclaration;
     }
 
+
     public function getIndexBy()
     {
         return $this->_indexBy;
     }
 
-    public function getRelations()
+
+    public function getJoinVariableDeclarations()
     {
-        return $this->_relations;
+        return $this->_joinVariableDeclarations;
     }
 }

lib/Doctrine/Query/Production/InExpression.php

@@ -88,35 +88,20 @@ class Doctrine_Query_Production_InExpression extends Doctrine_Query_Production
         return $value->buildSql();
     }
 
-    /**
-     * Visitor support
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        if ($this->_subselect !== null) {
-            $this->_subselect->accept($visitor);
-        } else {
-            foreach ($this->_atoms as $atom) {
-                $atom->accept($visitor);
-            }
-        }
-        $visitor->visitInExpression($this);
-    }
 
     /* Getters */
-    
     public function isNot()
     {
         return $this->_not;
     }
 
+
     public function getSubselect()
     {
         return $this->_subselect;
     }
 
+
     public function getAtoms()
     {
         return $this->_atoms;

lib/Doctrine/Query/Production/IndexBy.php

@@ -24,6 +24,7 @@
  *
  * @package     Doctrine
  * @subpackage  Query
+ * @author      Guilherme Blanco <guilhermeblanco@hotmail.com>
  * @author      Janne Vanhala <jpvanhal@cc.hut.fi>
  * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
  * @link        http://www.phpdoctrine.org
@@ -95,7 +96,6 @@ class Doctrine_Query_Production_IndexBy extends Doctrine_Query_Production
             );
         }
 
-
         $queryComponent['map'] = $this->_fieldName;
         $parserResult->setQueryComponent($this->_componentAlias, $queryComponent);
     }
@@ -106,23 +106,14 @@ class Doctrine_Query_Production_IndexBy extends Doctrine_Query_Production
         return '';
     }
 
-    /**
-     * Visitor support
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        $visitor->visitIndexBy($this);
-    }
 
     /* Getters */
-    
     public function getComponentAlias()
     {
         return $this->_componentAlias;
     }
 
+
     public function getFieldName()
     {
         return $this->_fieldName;

lib/Doctrine/Query/Production/Join.php

@@ -24,6 +24,7 @@
  *
  * @package     Doctrine
  * @subpackage  Query
+ * @author      Guilherme Blanco <guilhermeblanco@hotmail.com>
  * @author      Janne Vanhala <jpvanhal@cc.hut.fi>
  * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
  * @link        http://www.phpdoctrine.org
@@ -74,36 +75,68 @@ class Doctrine_Query_Production_Join extends Doctrine_Query_Production
 
     public function buildSql()
     {
-        return '';
+        $parserResult = $this->_parser->getParserResult();
+
+        // Get the connection for the component
+        $conn = $this->_em->getConnection();
+
+        $sql = $this->_joinType . ' JOIN ' . $this->_rangeVariableDeclaration->buildSql();
+        $conditionExpression = isset($this->_conditionExpression)
+            ? $this->_conditionExpression->buildSql() : '';
+
+        if ($this->_whereType == 'ON') {
+            return $sql . ' ON ' . $conditionExpression;
         }
 
-    /**
+        // We need to build the relationship conditions. Retrieving AssociationMapping
-     * Visitor support
+       $queryComponent = $this->_rangeVariableDeclaration->getQueryComponent();
-     *
+       $relationColumns = $queryComponent['relation']->getSourceToTargetKeyColumns();
-     * @param object $visitor
+       $relationConditionExpression = '';
-     */
+
-    public function accept($visitor)
+       // We have an array('localColumn' => 'foreignColumn', ...) here
-    {
+       foreach ($relationColumns as $localColumn => $foreignColumn) {
-        $visitor->visitJoin($this);
+           // leftExpression = rightExpression
+
+           // Defining leftExpression
+           $leftExpression = $conn->quoteIdentifier(
+               $parserResult->getTableAliasFromComponentAlias($queryComponent['parent']) . '.' . $localColumn
+           );
+
+           // Defining rightExpression
+           $rightExpression = $conn->quoteIdentifier(
+               $parserResult->getTableAliasFromComponentAlias(
+                   $this->_rangeVariableDeclaration->getIdentificationVariable()
+               ) . '.' . $foreignColumn
+           );
+
+           // Building the relation
+           $relationConditionExpression .= (($relationConditionExpression != '') ? ' AND ' : '')
+               . $leftExpression . ' = ' . $rightExpression;
        }
 
+       return $sql . ' ON ' . $relationConditionExpression . ' AND (' . $conditionExpression . ')';
+    }
+
+
     /* Getters */
-    
     public function getJoinType()
     {
         return $this->_joinType;
     }
 
+
     public function getRangeVariableDeclaration()
     {
         return $this->_rangeVariableDeclaration;
     }
 
+
     public function getWhereType()
     {
         return $this->_whereType;
     }
 
+
     public function getConditionalExpression()
     {
         return $this->_conditionalExpression;

lib/Doctrine/Query/Production/JoinVariableDeclaration.php

@@ -0,0 +1,70 @@
+<?php
+/*
+ *  $Id$
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the LGPL. For more information, see
+ * <http://www.phpdoctrine.org>.
+ */
+
+/**
+ * JoinVariableDeclaration = Join [IndexBy]
+ *
+ * @package     Doctrine
+ * @subpackage  Query
+ * @author      Guilherme Blanco <guilhermeblanco@hotmail.com>
+ * @author      Janne Vanhala <jpvanhal@cc.hut.fi>
+ * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
+ * @link        http://www.phpdoctrine.org
+ * @since       2.0
+ * @version     $Revision$
+ */
+class Doctrine_Query_Production_JoinVariableDeclaration extends Doctrine_Query_Production
+{
+    protected $_join;
+
+    protected $_indexBy;
+
+
+    public function syntax($paramHolder)
+    {
+        $this->_join = $this->AST('Join', $paramHolder);
+
+        if ($this->_isNextToken(Doctrine_Query_Token::T_INDEX)) {
+            $paramHolder->set('componentAlias', $this->_join->getRangeVariableDeclaration()->getIdentificationVariable());
+            $this->_indexBy = $this->AST('IndexBy', $paramHolder);
+            $paramHolder->remove('componentAlias');
+        }
+    }
+
+
+    public function buildSql()
+    {
+        return $this->_join->buildSql() . ' ' . (isset($this->_indexby) ? $this->_indexby->buildSql() . ' ' : '');
+    }
+
+
+    /* Getters */
+    public function getJoin()
+    {
+        return $this->_join;
+    }
+
+
+    public function getIndexBy()
+    {
+        return $this->_indexBy;
+    }
+}

lib/Doctrine/Query/Production/LikeExpression.php

@@ -70,29 +70,20 @@ class Doctrine_Query_Production_LikeExpression extends Doctrine_Query_Production
              . (($this->_escapeString !== null) ? ' ESCAPE ' . $this->_escapeString : '');
     }
 
-    /**
-     * Visitor support
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        $this->_expression->accept($visitor);
-        $visitor->visitLikeExpression($this);
-    }
 
     /* Getters */
-    
     public function isNot()
     {
         return $this->_not;
     }
 
+
     public function getExpression()
     {
         return $this->_expression;
     }
 
+
     public function getEscapeString()
     {
         return $this->_escapeString;

lib/Doctrine/Query/Production/NullComparisonExpression.php

@@ -56,18 +56,8 @@ class Doctrine_Query_Production_NullComparisonExpression extends Doctrine_Query_
         return 'IS ' . (($this->_not) ? 'NOT ' : '') . 'NULL';
     }
 
-    /**
-     * Visitor support
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        $visitor->visitNullComparisonExpression($this);
-    }
 
     /* Getters */
-    
     public function isNot()
     {
         return $this->_not;

lib/Doctrine/Query/Production/PathExpressionEndingWithAsterisk.php

@@ -154,23 +154,14 @@ class Doctrine_Query_Production_PathExpressionEndingWithAsterisk extends Doctrin
         return $str;
     }
 
-    /**
-     * Visitor support
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        $visitor->visitPathExpressionEndingWithAsterisk($this);
-    }
 
     /* Getters */
-    
     public function getIdentifiers()
     {
         return $this->_identifiers;
     }
 
+
     public function getQueryComponent()
     {
         return  $this->_queryComponent;

lib/Doctrine/Query/Production/QuantifiedExpression.php

@@ -70,24 +70,14 @@ class Doctrine_Query_Production_QuantifiedExpression extends Doctrine_Query_Prod
         return $this->_type . ' (' . $this->_subselect->buildSql() . ')';
     }
 
-    /**
-     * Visitor support
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        $this->_subselect->accept($visitor);
-        $visitor->visitQuantifiedExpression($this);
-    }
 
     /* Getters */
-    
     public function getType()
     {
         return $this->_type;
     }
 
+
     public function getSubselect()
     {
         return $this->_subselect;

lib/Doctrine/Query/Production/RangeVariableDeclaration.php

@@ -35,6 +35,8 @@ class Doctrine_Query_Production_RangeVariableDeclaration extends Doctrine_Query_
 {
     protected $_identifiers = array();
 
+    protected $_queryComponent;
+
     protected $_identificationVariable;
 
 
@@ -99,14 +101,19 @@ class Doctrine_Query_Production_RangeVariableDeclaration extends Doctrine_Query_
                 $this->_semanticalWithSingleIdentifier();
             }
         }
-
-        return $this->_identificationVariable;
     }
 
 
     public function buildSql()
     {
-        return '';
+         // We need to bring the queryComponent and get things from there.
+        $parserResult = $this->_parser->getParserResult();
+
+        // Retrieving connection
+        $conn = $this->_em->getConnection();
+
+        return $conn->quoteIdentifier($this->_queryComponent['metadata']->getTableName()) . ' '
+             . $conn->quoteIdentifier($parserResult->getTableAliasFromComponentAlias($this->_identificationVariable));
     }
 
 
@@ -123,7 +130,7 @@ class Doctrine_Query_Production_RangeVariableDeclaration extends Doctrine_Query_
             $classMetadata = $this->_em->getClassMetadata($componentName);
 
             // Building queryComponent
-            $queryComponent = array(
+            $this->_queryComponent = array(
                 'metadata' => $classMetadata,
                 'parent'   => null,
                 'relation' => null,
@@ -144,7 +151,7 @@ class Doctrine_Query_Production_RangeVariableDeclaration extends Doctrine_Query_
         //echo "Identification Variable: " .$this->_identificationVariable . "\n";
 
         $tableAlias = $parserResult->generateTableAlias($classMetadata->getClassName());
-        $parserResult->setQueryComponent($this->_identificationVariable, $queryComponent);
+        $parserResult->setQueryComponent($this->_identificationVariable, $this->_queryComponent);
         $parserResult->setTableAlias($tableAlias, $this->_identificationVariable);
     }
 
@@ -158,8 +165,8 @@ class Doctrine_Query_Production_RangeVariableDeclaration extends Doctrine_Query_
 
         // Retrieve the base component
         try {
-            $queryComponent = $parserResult->getQueryComponent($this->_identifiers[0]);
+            $this->_queryComponent = $parserResult->getQueryComponent($this->_identifiers[0]);
-            $classMetadata = $queryComponent['metadata'];
+            $classMetadata = $this->_queryComponent['metadata'];
             $className = $classMetadata->getClassName();
             $parent = $path = $this->_identifiers[0];
         } catch (Doctrine_Exception $e) {
@@ -175,8 +182,8 @@ class Doctrine_Query_Production_RangeVariableDeclaration extends Doctrine_Query_
 
             if ($parserResult->hasQueryComponent($path)) {
                 // We already have the query component on hands, get it
-                $queryComponent = $parserResult->getQueryComponent($path);
+                $this->_queryComponent = $parserResult->getQueryComponent($path);
-                $classMetadata = $queryComponent['metadata'];
+                $classMetadata = $this->_queryComponent['metadata'];
 
                 // If we are in our last check and identification variable is null, we throw semantical error
                 if ($i == $l - 1 && $this->_identificationVariable === null) {
@@ -204,7 +211,7 @@ class Doctrine_Query_Production_RangeVariableDeclaration extends Doctrine_Query_
                     $relation = $classMetadata->getAssociationMapping($relationName);
                     $targetClassMetadata = $this->_em->getClassMetadata($relation->getTargetEntityName());
 
-                    $queryComponent = array(
+                    $this->_queryComponent = array(
                         'metadata' => $targetClassMetadata,
                         'parent'   => $parent,
                         'relation' => $relation,
@@ -228,29 +235,24 @@ class Doctrine_Query_Production_RangeVariableDeclaration extends Doctrine_Query_
 
         $tableAlias = $parserResult->generateTableAlias($targetClassMetadata->getClassName());
 
-	//echo "Table alias: " . $tableAlias . "\n";
+        $parserResult->setQueryComponent($this->_identificationVariable, $this->_queryComponent);
-
-        $parserResult->setQueryComponent($this->_identificationVariable, $queryComponent);
         $parserResult->setTableAlias($tableAlias, $this->_identificationVariable);
     }
 
-    /**
-     * Visitor support
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        $visitor->visitRangeVariableDeclaration($this);
-    }
 
     /* Getters */
-    
     public function getIdentifiers()
     {
         return $this->_identifiers;
     }
 
+
+    public function getQueryComponent()
+    {
+        return $this->_queryComponent;
+    }
+
+
     public function getIdentificationVariable()
     {
         return $this->_identificationVariable;

lib/Doctrine/Query/Production/SelectClause.php

@@ -86,26 +86,14 @@ class Doctrine_Query_Production_SelectClause extends Doctrine_Query_Production
         return $value->buildSql();
     }
 
-    /**
-     * Visitor support
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        foreach ($this->_selectExpressions as $expression) {
-            $expression->accept($visitor);
-        }
-        $visitor->visitSelectClause($this);
-    }
 
     /* Getters */
-    
     public function isDistinct()
     {
         return $this->_isDistinct;
     }
 
+
     public function getSelectExpressions()
     {
         return $this->_selectExpressions;

lib/Doctrine/Query/Production/SelectExpression.php

@@ -190,4 +190,23 @@ class Doctrine_Query_Production_SelectExpression extends Doctrine_Query_Producti
     {
         return ! is_string($value);
     }
+
+
+     /* Getters */
+    public function getLeftExpression()
+    {
+        return $this->_leftExpression;
+    }
+
+
+    public function isSubselect()
+    {
+        return $this->_isSubselect;
+    }
+
+
+    public function getFieldIdentificationVariable()
+    {
+        return $this->_fieldIdentificationVariable;
+    }
 }

lib/Doctrine/Query/Production/SelectStatement.php

@@ -94,57 +94,38 @@ class Doctrine_Query_Production_SelectStatement extends Doctrine_Query_Productio
              . (($this->_orderByClause !== null) ? ' ' . $this->_orderByClause->buildSql() : '');
     }
 
-    /**
-     * Visitor support
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        $this->_selectClause->accept($visitor);
-        $this->_fromClause->accept($visitor);
-        if ($this->_whereClause) {
-            $this->_whereClause->accept($visitor);
-        }
-        if ($this->_groupByClause) {
-            $this->_groupByClause->accept($visitor);
-        }
-        if ($this->_havingClause) {
-            $this->_havingClause->accept($visitor);
-        }
-        if ($this->_orderByClause) {
-            $this->_orderByClause->accept($visitor);
-        }
-        $visitor->visitSelectStatement($this);
-    }
 
     /* Getters */
-    
     public function getSelectClause()
     {
         return $this->_selectClause;
     }
 
+
     public function getFromClause()
     {
         return $this->_fromClause;
     }
 
+
     public function getWhereClause()
     {
         return $this->_whereClause;
     }
 
+
     public function getGroupByClause()
     {
         return $this->_groupByClause;
     }
 
+
     public function getHavingClause()
     {
         return $this->_havingClause;
     }
 
+
     public function getOrderByClause()
     {
         return $this->_orderByClause;

lib/Doctrine/Query/Production/SimpleConditionalExpression.php

@@ -107,25 +107,14 @@ class Doctrine_Query_Production_SimpleConditionalExpression extends Doctrine_Que
         return $token['type'];
     }
 
-    /**
-     * Visitor support
-     *
-     * @param object $visitor
-     */
-    public function accept($visitor)
-    {
-        $this->_leftExpression->accept($visitor);
-        $this->_rightExpression->accept($visitor);
-        $visitor->visitSimpleConditionalExpression($this);
-    }
 
     /* Getters */
-    
     public function getLeftExpression()
     {
         return $this->_leftExpression;
     }
 
+
     public function getRightExpression()
     {
         return $this->_rightExpression;

lib/Doctrine/Query/Production/WhereClause.php

@@ -50,17 +50,8 @@ class Doctrine_Query_Production_WhereClause extends Doctrine_Query_Production
         return 'WHERE ' . $this->_conditionalExpression->buildSql();
     }
 
-    /**
-     * Visitor support.
-     */
-    public function accept($visitor)
-    {
-        $this->_conditionalExpression->accept($visitor);
-        $visitor->visitWhereClause($this);
-    }
 
     /* Getters */
-    
     public function getConditionalExpression()
     {
         return $this->_conditionalExpression;

query-language.txt

@@ -37,7 +37,8 @@ OrderByItem = Expression ["ASC" | "DESC"]
 GroupByItem = PathExpression
 UpdateItem = PathExpression "=" (Expression | "NULL")
 
-IdentificationVariableDeclaration = RangeVariableDeclaration [IndexBy] {Join [IndexBy]}
+IdentificationVariableDeclaration = RangeVariableDeclaration [IndexBy] {JoinVariableDeclaration}
+JoinVariableDeclaration = Join [IndexBy]
 RangeVariableDeclaration = identifier {"." identifier} [["AS"] IdentificationVariable]
 VariableDeclaration = identifier [["AS"] IdentificationVariable]
 IdentificationVariable = identifier

tests/Orm/Query/SelectSqlGenerationTest.php

@@ -167,4 +167,13 @@ class Orm_Query_SelectSqlGenerationTest extends Doctrine_OrmTestCase
         );
     }
 
+
+    public function testPlainJoinWithoutClause()
+    {
+        $this->assertSqlGeneration(
+            'SELECT u.id, a.id FROM CmsUser u LEFT JOIN u.articles a',
+            'SELECT cu.id AS cu__id, ca.id AS ca__id FROM cms_user cu LEFT JOIN cms_article ca ON ca.user_id = cu.id WHERE 1 = 1'
+        );
+    }
+
 }