diff --git a/querydsl-collections/src/main/java/com/mysema/query/collections/ColDeleteClause.java b/querydsl-collections/src/main/java/com/mysema/query/collections/ColDeleteClause.java
index cf84c0cc4..62126e96d 100644
--- a/querydsl-collections/src/main/java/com/mysema/query/collections/ColDeleteClause.java
+++ b/querydsl-collections/src/main/java/com/mysema/query/collections/ColDeleteClause.java
@@ -47,14 +47,23 @@ public class ColDeleteClause<T> implements DeleteClause<ColDeleteClause<T>>{
     }
 
     @Override
-    public ColDeleteClause<T> where(EBoolean... o) {
-        query.where(o);
+    public <P> ColDeleteClause<T> set(Path<P> path, P value) {
+        if (value != null){
+            query.where(path.asExpr().eq(value));
+        }else{
+            query.where(path.isNull());
+        }
         return this;
     }
     
+    @Override
+    public ColDeleteClause<T> where(EBoolean... o) {
+        query.where(o);
+        return this;
+    }
+
     @Override
     public String toString(){
         return "delete " + query.toString();
     }
-
 }
diff --git a/querydsl-core/src/main/java/com/mysema/query/dml/StoreClause.java b/querydsl-core/src/main/java/com/mysema/query/dml/DMLClause.java
similarity index 70%
rename from querydsl-core/src/main/java/com/mysema/query/dml/StoreClause.java
rename to querydsl-core/src/main/java/com/mysema/query/dml/DMLClause.java
index ff0234c40..622762463 100644
--- a/querydsl-core/src/main/java/com/mysema/query/dml/StoreClause.java
+++ b/querydsl-core/src/main/java/com/mysema/query/dml/DMLClause.java
@@ -10,17 +10,17 @@ import javax.annotation.Nullable;
 import com.mysema.query.types.Path;
 
 /**
- * Parent interface for InsertClause and UpdateClause
+ * Parent interface for DeleteClause, InsertClause and UpdateCluase
  * 
  * @author tiwe
  *
  * @param <C>
  */
-public interface StoreClause<C extends StoreClause<C>> {
+public interface DMLClause<C extends DMLClause<C>> {
     
 
     /**
-     * Execute the clause and return the amount of inserted/updated rows/items
+     * Execute the clause and return the amount of deleted/inserted/updated rows/items
      *
      * @return
      */
diff --git a/querydsl-core/src/main/java/com/mysema/query/dml/DeleteClause.java b/querydsl-core/src/main/java/com/mysema/query/dml/DeleteClause.java
index 20e70c248..e2f9cf920 100644
--- a/querydsl-core/src/main/java/com/mysema/query/dml/DeleteClause.java
+++ b/querydsl-core/src/main/java/com/mysema/query/dml/DeleteClause.java
@@ -14,7 +14,7 @@ import com.mysema.query.types.expr.EBoolean;
  *
  * @param <C>
  */
-public interface DeleteClause<C extends DeleteClause<C>> {
+public interface DeleteClause<C extends DeleteClause<C>> extends DMLClause<C>{
 
     /**
      * Defines the filter constraints
@@ -24,10 +24,4 @@ public interface DeleteClause<C extends DeleteClause<C>> {
      */
     C where(EBoolean... o);
 
-    /**
-     * Execute the delete clause and return the amount of deleted rows/items
-     *
-     * @return
-     */
-    long execute();
 }
diff --git a/querydsl-core/src/main/java/com/mysema/query/dml/InsertClause.java b/querydsl-core/src/main/java/com/mysema/query/dml/InsertClause.java
index 4cabc6456..2b1778360 100644
--- a/querydsl-core/src/main/java/com/mysema/query/dml/InsertClause.java
+++ b/querydsl-core/src/main/java/com/mysema/query/dml/InsertClause.java
@@ -15,7 +15,7 @@ import com.mysema.query.types.SubQuery;
  *
  * @param <C>
  */
-public interface InsertClause<C extends InsertClause<C>> extends StoreClause<C>{
+public interface InsertClause<C extends InsertClause<C>> extends DMLClause<C>{
 
     /**
      * Define the columns to be populated
diff --git a/querydsl-core/src/main/java/com/mysema/query/dml/UpdateClause.java b/querydsl-core/src/main/java/com/mysema/query/dml/UpdateClause.java
index 92af95be7..a7797baf6 100644
--- a/querydsl-core/src/main/java/com/mysema/query/dml/UpdateClause.java
+++ b/querydsl-core/src/main/java/com/mysema/query/dml/UpdateClause.java
@@ -17,7 +17,7 @@ import com.mysema.query.types.expr.EBoolean;
  *
  * @param <C>
  */
-public interface UpdateClause<C extends UpdateClause<C>> extends StoreClause<C>{
+public interface UpdateClause<C extends UpdateClause<C>> extends DMLClause<C>{
 
     /**
      * Set the paths to be updated
diff --git a/querydsl-core/src/main/java/com/mysema/query/types/Custom.java b/querydsl-core/src/main/java/com/mysema/query/types/Custom.java
index a4ba1f3b9..6cb04a0ef 100644
--- a/querydsl-core/src/main/java/com/mysema/query/types/Custom.java
+++ b/querydsl-core/src/main/java/com/mysema/query/types/Custom.java
@@ -7,6 +7,8 @@ package com.mysema.query.types;
 
 import java.util.List;
 
+import com.mysema.query.types.expr.ESimple;
+
 /**
  * Custom provides base types for custom expressions with integrated
  * serialization templates
@@ -48,6 +50,6 @@ public interface Custom<T> {
      *
      * @return
      */
-    Expr<T> asExpr();
+    ESimple<T> asExpr();
 
 }
diff --git a/querydsl-core/src/main/java/com/mysema/query/types/Expr.java b/querydsl-core/src/main/java/com/mysema/query/types/Expr.java
index f1226bbee..e3507ec20 100644
--- a/querydsl-core/src/main/java/com/mysema/query/types/Expr.java
+++ b/querydsl-core/src/main/java/com/mysema/query/types/Expr.java
@@ -43,15 +43,6 @@ public abstract class Expr<D> implements Serializable{
 
     public abstract void accept(Visitor v);
 
-    /**
-     * Used for safe casts from Path, SubQuery, Operation and Custom to Expr
-     *
-     * @return
-     */
-    public final Expr<D> asExpr(){
-        return this;
-    }
-
     public abstract Expr<D> as(Path<D> alias);
 
     /**
diff --git a/querydsl-core/src/main/java/com/mysema/query/types/Operation.java b/querydsl-core/src/main/java/com/mysema/query/types/Operation.java
index 18a6911e7..3010035da 100644
--- a/querydsl-core/src/main/java/com/mysema/query/types/Operation.java
+++ b/querydsl-core/src/main/java/com/mysema/query/types/Operation.java
@@ -7,6 +7,8 @@ package com.mysema.query.types;
 
 import java.util.List;
 
+import com.mysema.query.types.expr.ESimple;
+
 /**
  * Operation represents an operation with operator and arguments
  *
@@ -20,7 +22,7 @@ public interface Operation<RT> {
      *
      * @return
      */
-    Expr<RT> asExpr();
+    ESimple<RT> asExpr();
 
     /**
      * Get the argument with the given index
diff --git a/querydsl-core/src/main/java/com/mysema/query/types/Path.java b/querydsl-core/src/main/java/com/mysema/query/types/Path.java
index 62ce568b6..8a5a5a4ab 100644
--- a/querydsl-core/src/main/java/com/mysema/query/types/Path.java
+++ b/querydsl-core/src/main/java/com/mysema/query/types/Path.java
@@ -8,6 +8,7 @@ package com.mysema.query.types;
 import java.lang.reflect.AnnotatedElement;
 
 import com.mysema.query.types.expr.EBoolean;
+import com.mysema.query.types.expr.ESimple;
 
 /**
  * Path represents a path expression
@@ -21,7 +22,7 @@ public interface Path<C> {
      *
      * @return
      */
-    Expr<C> asExpr();
+    ESimple<C> asExpr();
 
     /**
      * Get the metadata for this path
diff --git a/querydsl-core/src/main/java/com/mysema/query/types/SubQuery.java b/querydsl-core/src/main/java/com/mysema/query/types/SubQuery.java
index 5e928c55c..51ac32e5d 100644
--- a/querydsl-core/src/main/java/com/mysema/query/types/SubQuery.java
+++ b/querydsl-core/src/main/java/com/mysema/query/types/SubQuery.java
@@ -7,6 +7,8 @@ package com.mysema.query.types;
 
 import com.mysema.query.QueryMetadata;
 import com.mysema.query.types.expr.EBoolean;
+import com.mysema.query.types.expr.ESimple;
+import com.mysema.query.types.query.Detachable;
 
 /**
  *
@@ -46,6 +48,6 @@ public interface SubQuery<T>{
      *
      * @return
      */
-    Expr<T> asExpr();
+    ESimple<T> asExpr();
 
 }
diff --git a/querydsl-core/src/main/java/com/mysema/query/types/custom/CustomMixin.java b/querydsl-core/src/main/java/com/mysema/query/types/custom/CustomMixin.java
index 150b40452..bf3cd5019 100644
--- a/querydsl-core/src/main/java/com/mysema/query/types/custom/CustomMixin.java
+++ b/querydsl-core/src/main/java/com/mysema/query/types/custom/CustomMixin.java
@@ -11,6 +11,7 @@ import java.util.List;
 import com.mysema.query.types.Custom;
 import com.mysema.query.types.Expr;
 import com.mysema.query.types.Template;
+import com.mysema.query.types.expr.ESimple;
 
 /**
  * Mixin implementation of the Custom interface
@@ -23,7 +24,7 @@ public final class CustomMixin<T> implements Custom<T>, Serializable {
 
     private static final long serialVersionUID = 6951623726800809083L;
 
-    private final Expr<T> self;
+    private final ESimple<T> self;
 
     private final List<Expr<?>> args;
 
@@ -75,7 +76,7 @@ public final class CustomMixin<T> implements Custom<T>, Serializable {
     }
 
     @Override
-    public Expr<T> asExpr() {
+    public ESimple<T> asExpr() {
         return self;
     }
 }
diff --git a/querydsl-core/src/main/java/com/mysema/query/types/expr/ESimple.java b/querydsl-core/src/main/java/com/mysema/query/types/expr/ESimple.java
index 751778080..6c8bb093f 100644
--- a/querydsl-core/src/main/java/com/mysema/query/types/expr/ESimple.java
+++ b/querydsl-core/src/main/java/com/mysema/query/types/expr/ESimple.java
@@ -36,6 +36,15 @@ public abstract class ESimple<D> extends Expr<D> {
     public ESimple(Class<? extends D> type) {
         super(type);
     }
+    
+    /**
+     * Used for safe casts from Path, SubQuery, Operation and Custom to Expr
+     *
+     * @return
+     */
+    public final ESimple<D> asExpr(){
+        return this;
+    }
 
     @Override
     public ENumber<Long> count(){
diff --git a/querydsl-core/src/main/java/com/mysema/query/types/expr/OperationMixin.java b/querydsl-core/src/main/java/com/mysema/query/types/expr/OperationMixin.java
index 2d4702b4a..074954656 100644
--- a/querydsl-core/src/main/java/com/mysema/query/types/expr/OperationMixin.java
+++ b/querydsl-core/src/main/java/com/mysema/query/types/expr/OperationMixin.java
@@ -26,7 +26,7 @@ public final class OperationMixin<RT> implements Operation<RT>, Serializable {
 
     private final Operator<? super RT> operator;
 
-    private final Expr<RT> self;
+    private final ESimple<RT> self;
 
     public OperationMixin(Operation<RT> self, Operator<? super RT> operator, List<Expr<?>> args){
         this.self = self.asExpr();
@@ -35,7 +35,7 @@ public final class OperationMixin<RT> implements Operation<RT>, Serializable {
     }
 
     @Override
-    public Expr<RT> asExpr() {
+    public ESimple<RT> asExpr() {
         return self;
     }
 
diff --git a/querydsl-core/src/main/java/com/mysema/query/types/path/PathMixin.java b/querydsl-core/src/main/java/com/mysema/query/types/path/PathMixin.java
index e86dc8a5b..8fd6c51ed 100644
--- a/querydsl-core/src/main/java/com/mysema/query/types/path/PathMixin.java
+++ b/querydsl-core/src/main/java/com/mysema/query/types/path/PathMixin.java
@@ -16,6 +16,7 @@ import com.mysema.query.types.Path;
 import com.mysema.query.types.PathMetadata;
 import com.mysema.query.types.PathType;
 import com.mysema.query.types.expr.EBoolean;
+import com.mysema.query.types.expr.ESimple;
 import com.mysema.query.types.expr.OBoolean;
 import com.mysema.util.ReflectionUtils;
 
@@ -38,7 +39,7 @@ public final class PathMixin<T> implements Path<T>, Serializable {
 
     private final Path<?> root;
 
-    private final Expr<T> self;
+    private final ESimple<T> self;
 
     @Nullable
     private AnnotatedElement annotatedElement;
@@ -50,7 +51,7 @@ public final class PathMixin<T> implements Path<T>, Serializable {
     }
 
     @Override
-    public Expr<T> asExpr() {
+    public ESimple<T> asExpr() {
         return self;
     }
 
diff --git a/querydsl-core/src/main/java/com/mysema/query/types/query/ListSubQuery.java b/querydsl-core/src/main/java/com/mysema/query/types/query/ListSubQuery.java
index c8e2c06b9..cc9f28e84 100644
--- a/querydsl-core/src/main/java/com/mysema/query/types/query/ListSubQuery.java
+++ b/querydsl-core/src/main/java/com/mysema/query/types/query/ListSubQuery.java
@@ -75,7 +75,7 @@ public final class ListSubQuery<A> extends ECollectionBase<List<A>,A> implements
 
     @SuppressWarnings("unchecked")
     public Expr<?> as(Expr<?> alias) {
-        return OSimple.create(alias.getType(),(Operator)Ops.ALIAS, this, alias.asExpr());
+        return OSimple.create(alias.getType(),(Operator)Ops.ALIAS, this, alias);
     }
 
 }
diff --git a/querydsl-core/src/main/java/com/mysema/query/types/query/SubQueryMixin.java b/querydsl-core/src/main/java/com/mysema/query/types/query/SubQueryMixin.java
index 349732de7..03491df27 100644
--- a/querydsl-core/src/main/java/com/mysema/query/types/query/SubQueryMixin.java
+++ b/querydsl-core/src/main/java/com/mysema/query/types/query/SubQueryMixin.java
@@ -12,6 +12,7 @@ import com.mysema.query.types.Expr;
 import com.mysema.query.types.Ops;
 import com.mysema.query.types.SubQuery;
 import com.mysema.query.types.expr.EBoolean;
+import com.mysema.query.types.expr.ESimple;
 import com.mysema.query.types.expr.OBoolean;
 
 /**
@@ -27,7 +28,7 @@ public class SubQueryMixin<T> implements SubQuery<T>{
 
     private final QueryMetadata metadata;
 
-    private final Expr<T> self;
+    private final ESimple<T> self;
 
     public SubQueryMixin(SubQuery<T> self, QueryMetadata metadata){
         this.self = self.asExpr();
@@ -69,7 +70,7 @@ public class SubQueryMixin<T> implements SubQuery<T>{
     }
 
     @Override
-    public Expr<T> asExpr() {
+    public ESimple<T> asExpr() {
         return self;
     }
 
diff --git a/querydsl-hql/src/main/java/com/mysema/query/hql/hibernate/HibernateDeleteClause.java b/querydsl-hql/src/main/java/com/mysema/query/hql/hibernate/HibernateDeleteClause.java
index 6d2cef045..ee5f8735f 100644
--- a/querydsl-hql/src/main/java/com/mysema/query/hql/hibernate/HibernateDeleteClause.java
+++ b/querydsl-hql/src/main/java/com/mysema/query/hql/hibernate/HibernateDeleteClause.java
@@ -18,7 +18,9 @@ import com.mysema.query.dml.DeleteClause;
 import com.mysema.query.hql.HQLSerializer;
 import com.mysema.query.hql.HQLTemplates;
 import com.mysema.query.hql.JPQLTemplates;
+import com.mysema.query.types.Path;
 import com.mysema.query.types.expr.EBoolean;
+import com.mysema.query.types.path.NullExpr;
 import com.mysema.query.types.path.PEntity;
 
 /**
@@ -60,6 +62,16 @@ public class HibernateDeleteClause implements DeleteClause<HibernateDeleteClause
         return query.executeUpdate();
     }
 
+    @Override
+    public <T> HibernateDeleteClause set(Path<T> path, T value) {
+        if (value != null){
+            md.addWhere(path.asExpr().eq(value));
+        }else{
+            md.addWhere(path.isNull());
+        }
+        return this;
+    }
+    
     @Override
     public HibernateDeleteClause where(EBoolean... o) {
         md.addWhere(o);
diff --git a/querydsl-hql/src/main/java/com/mysema/query/hql/jpa/JPADeleteClause.java b/querydsl-hql/src/main/java/com/mysema/query/hql/jpa/JPADeleteClause.java
index 477469017..095e17ee0 100644
--- a/querydsl-hql/src/main/java/com/mysema/query/hql/jpa/JPADeleteClause.java
+++ b/querydsl-hql/src/main/java/com/mysema/query/hql/jpa/JPADeleteClause.java
@@ -17,7 +17,9 @@ import com.mysema.query.dml.DeleteClause;
 import com.mysema.query.hql.HQLSerializer;
 import com.mysema.query.hql.HQLTemplates;
 import com.mysema.query.hql.JPQLTemplates;
+import com.mysema.query.types.Path;
 import com.mysema.query.types.expr.EBoolean;
+import com.mysema.query.types.path.NullExpr;
 import com.mysema.query.types.path.PEntity;
 
 /**
@@ -54,6 +56,16 @@ public class JPADeleteClause implements DeleteClause<JPADeleteClause>{
         JPAUtil.setConstants(query, constants, metadata.getParams());
         return query.executeUpdate();
     }
+    
+    @Override
+    public <T> JPADeleteClause set(Path<T> path, T value) {
+        if (value != null){
+            metadata.addWhere(path.asExpr().eq(value));
+        }else{
+            metadata.addWhere(path.isNull());
+        }
+        return this;
+    }
 
     @Override
     public JPADeleteClause where(EBoolean... o) {
diff --git a/querydsl-jdoql/src/main/java/com/mysema/query/jdoql/dml/JDOQLDeleteClause.java b/querydsl-jdoql/src/main/java/com/mysema/query/jdoql/dml/JDOQLDeleteClause.java
index fced55da9..6080b24a9 100644
--- a/querydsl-jdoql/src/main/java/com/mysema/query/jdoql/dml/JDOQLDeleteClause.java
+++ b/querydsl-jdoql/src/main/java/com/mysema/query/jdoql/dml/JDOQLDeleteClause.java
@@ -18,7 +18,9 @@ import com.mysema.query.QueryMetadata;
 import com.mysema.query.dml.DeleteClause;
 import com.mysema.query.jdoql.JDOQLSerializer;
 import com.mysema.query.jdoql.JDOQLTemplates;
+import com.mysema.query.types.Path;
 import com.mysema.query.types.expr.EBoolean;
+import com.mysema.query.types.path.NullExpr;
 import com.mysema.query.types.path.PEntity;
 
 /**
@@ -85,6 +87,16 @@ public class JDOQLDeleteClause implements DeleteClause<JDOQLDeleteClause>{
             }
         }
     }
+    
+    @Override
+    public <T> JDOQLDeleteClause set(Path<T> path, T value) {
+        if (value != null){
+            metadata.addWhere(path.asExpr().eq(value));
+        }else{
+            metadata.addWhere(path.isNull());
+        }
+        return this;
+    }
 
     @Override
     public JDOQLDeleteClause where(EBoolean... o) {
diff --git a/querydsl-sql/src/main/java/com/mysema/query/sql/dml/SQLDeleteClause.java b/querydsl-sql/src/main/java/com/mysema/query/sql/dml/SQLDeleteClause.java
index 0c9560a2d..b77385e6d 100644
--- a/querydsl-sql/src/main/java/com/mysema/query/sql/dml/SQLDeleteClause.java
+++ b/querydsl-sql/src/main/java/com/mysema/query/sql/dml/SQLDeleteClause.java
@@ -19,7 +19,9 @@ import com.mysema.query.dml.DeleteClause;
 import com.mysema.query.sql.SQLSerializer;
 import com.mysema.query.sql.SQLTemplates;
 import com.mysema.query.types.Param;
+import com.mysema.query.types.Path;
 import com.mysema.query.types.expr.EBoolean;
+import com.mysema.query.types.path.NullExpr;
 import com.mysema.query.types.path.PEntity;
 import com.mysema.util.JDBCUtil;
 
@@ -80,6 +82,16 @@ public class SQLDeleteClause implements DeleteClause<SQLDeleteClause> {
             }
         }
     }
+    
+    @Override
+    public <T> SQLDeleteClause set(Path<T> path, T value) {
+        if (value != null){
+            where.and(path.asExpr().eq(value));
+        }else{
+            where.and(path.isNull());
+        }
+        return this;
+    }
 
     @Override
     public SQLDeleteClause where(EBoolean... o) {
diff --git a/querydsl-sql/src/main/java/com/mysema/query/sql/dml/SQLMergeClause.java b/querydsl-sql/src/main/java/com/mysema/query/sql/dml/SQLMergeClause.java
index 4a83baa0a..996f2988a 100644
--- a/querydsl-sql/src/main/java/com/mysema/query/sql/dml/SQLMergeClause.java
+++ b/querydsl-sql/src/main/java/com/mysema/query/sql/dml/SQLMergeClause.java
@@ -18,7 +18,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import com.mysema.query.QueryException;
-import com.mysema.query.dml.StoreClause;
+import com.mysema.query.dml.DMLClause;
 import com.mysema.query.sql.SQLQuery;
 import com.mysema.query.sql.SQLQueryImpl;
 import com.mysema.query.sql.SQLSerializer;
@@ -39,7 +39,7 @@ import com.mysema.util.JDBCUtil;
  *
  */
 @edu.umd.cs.findbugs.annotations.SuppressWarnings("SQL_PREPARED_STATEMENT_GENERATED_FROM_NONCONSTANT_STRING")
-public class SQLMergeClause implements StoreClause<SQLMergeClause>{
+public class SQLMergeClause implements DMLClause<SQLMergeClause>{
 
     private static final Logger logger = LoggerFactory.getLogger(SQLMergeClause.class);
 
@@ -105,7 +105,7 @@ public class SQLMergeClause implements StoreClause<SQLMergeClause>{
     }
 
     @SuppressWarnings("unchecked")
-    private void populate(StoreClause<?> clause) {
+    private void populate(DMLClause<?> clause) {
         for (int i = 0; i < columns.size(); i++){
             clause.set((Path)columns.get(i), (Expr)values.get(i));
         }