http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/expression/visitors/AbstractExprVisitor.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/expression/visitors/AbstractExprVisitor.java
 
b/common/src/main/java/org/apache/drill/common/expression/visitors/AbstractExprVisitor.java
index af4e0e7..a31e6e8 100644
--- 
a/common/src/main/java/org/apache/drill/common/expression/visitors/AbstractExprVisitor.java
+++ 
b/common/src/main/java/org/apache/drill/common/expression/visitors/AbstractExprVisitor.java
@@ -28,20 +28,20 @@ import org.apache.drill.common.expression.NullExpression;
 import org.apache.drill.common.expression.SchemaPath;
 import org.apache.drill.common.expression.TypedNullConstant;
 import org.apache.drill.common.expression.ValueExpressions.BooleanExpression;
-import org.apache.drill.common.expression.ValueExpressions.FloatExpression;
-import org.apache.drill.common.expression.ValueExpressions.IntExpression;
-import org.apache.drill.common.expression.ValueExpressions.DoubleExpression;
-import org.apache.drill.common.expression.ValueExpressions.LongExpression;
-import org.apache.drill.common.expression.ValueExpressions.TimeExpression;
 import org.apache.drill.common.expression.ValueExpressions.DateExpression;
-import 
org.apache.drill.common.expression.ValueExpressions.IntervalYearExpression;
-import 
org.apache.drill.common.expression.ValueExpressions.IntervalDayExpression;
-import org.apache.drill.common.expression.ValueExpressions.TimeStampExpression;
-import org.apache.drill.common.expression.ValueExpressions.Decimal9Expression;
 import org.apache.drill.common.expression.ValueExpressions.Decimal18Expression;
 import org.apache.drill.common.expression.ValueExpressions.Decimal28Expression;
 import org.apache.drill.common.expression.ValueExpressions.Decimal38Expression;
+import org.apache.drill.common.expression.ValueExpressions.Decimal9Expression;
+import org.apache.drill.common.expression.ValueExpressions.DoubleExpression;
+import org.apache.drill.common.expression.ValueExpressions.FloatExpression;
+import org.apache.drill.common.expression.ValueExpressions.IntExpression;
+import 
org.apache.drill.common.expression.ValueExpressions.IntervalDayExpression;
+import 
org.apache.drill.common.expression.ValueExpressions.IntervalYearExpression;
+import org.apache.drill.common.expression.ValueExpressions.LongExpression;
 import org.apache.drill.common.expression.ValueExpressions.QuotedString;
+import org.apache.drill.common.expression.ValueExpressions.TimeExpression;
+import org.apache.drill.common.expression.ValueExpressions.TimeStampExpression;
 
 public abstract class AbstractExprVisitor<T, VAL, EXCEP extends Exception> 
implements ExprVisitor<T, VAL, EXCEP> {
   static final org.slf4j.Logger logger = 
org.slf4j.LoggerFactory.getLogger(AbstractExprVisitor.class);
@@ -171,6 +171,6 @@ public abstract class AbstractExprVisitor<T, VAL, EXCEP 
extends Exception> imple
   public T visitUnknown(LogicalExpression e, VAL value) throws EXCEP {
     throw new UnsupportedOperationException(String.format("Expression of type 
%s not handled by visitor type %s.", e.getClass().getCanonicalName(), 
this.getClass().getCanonicalName()));
   }
-  
-  
+
+
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/expression/visitors/AggregateChecker.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/expression/visitors/AggregateChecker.java
 
b/common/src/main/java/org/apache/drill/common/expression/visitors/AggregateChecker.java
index 4c75459..881dc15 100644
--- 
a/common/src/main/java/org/apache/drill/common/expression/visitors/AggregateChecker.java
+++ 
b/common/src/main/java/org/apache/drill/common/expression/visitors/AggregateChecker.java
@@ -30,20 +30,20 @@ import org.apache.drill.common.expression.NullExpression;
 import org.apache.drill.common.expression.SchemaPath;
 import org.apache.drill.common.expression.TypedNullConstant;
 import org.apache.drill.common.expression.ValueExpressions.BooleanExpression;
-import org.apache.drill.common.expression.ValueExpressions.DoubleExpression;
-import org.apache.drill.common.expression.ValueExpressions.LongExpression;
 import org.apache.drill.common.expression.ValueExpressions.DateExpression;
-import 
org.apache.drill.common.expression.ValueExpressions.IntervalYearExpression;
-import 
org.apache.drill.common.expression.ValueExpressions.IntervalDayExpression;
-import org.apache.drill.common.expression.ValueExpressions.TimeStampExpression;
-import org.apache.drill.common.expression.ValueExpressions.TimeExpression;
-import org.apache.drill.common.expression.ValueExpressions.Decimal9Expression;
 import org.apache.drill.common.expression.ValueExpressions.Decimal18Expression;
 import org.apache.drill.common.expression.ValueExpressions.Decimal28Expression;
 import org.apache.drill.common.expression.ValueExpressions.Decimal38Expression;
+import org.apache.drill.common.expression.ValueExpressions.Decimal9Expression;
+import org.apache.drill.common.expression.ValueExpressions.DoubleExpression;
 import org.apache.drill.common.expression.ValueExpressions.FloatExpression;
 import org.apache.drill.common.expression.ValueExpressions.IntExpression;
+import 
org.apache.drill.common.expression.ValueExpressions.IntervalDayExpression;
+import 
org.apache.drill.common.expression.ValueExpressions.IntervalYearExpression;
+import org.apache.drill.common.expression.ValueExpressions.LongExpression;
 import org.apache.drill.common.expression.ValueExpressions.QuotedString;
+import org.apache.drill.common.expression.ValueExpressions.TimeExpression;
+import org.apache.drill.common.expression.ValueExpressions.TimeStampExpression;
 
 public final class AggregateChecker implements ExprVisitor<Boolean, 
ErrorCollector, RuntimeException>{
 
@@ -85,10 +85,10 @@ public final class AggregateChecker implements 
ExprVisitor<Boolean, ErrorCollect
       if (arg.accept(this, errors))
         return true;
     }
-    
+
     return false;
   }
-  
+
   @Override
   public Boolean visitIfExpression(IfExpression ifExpr, ErrorCollector errors) 
{
     IfCondition c = ifExpr.ifCondition;

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/expression/visitors/ConditionalExprOptimizer.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/expression/visitors/ConditionalExprOptimizer.java
 
b/common/src/main/java/org/apache/drill/common/expression/visitors/ConditionalExprOptimizer.java
index 1a4b399..254926a 100644
--- 
a/common/src/main/java/org/apache/drill/common/expression/visitors/ConditionalExprOptimizer.java
+++ 
b/common/src/main/java/org/apache/drill/common/expression/visitors/ConditionalExprOptimizer.java
@@ -28,36 +28,27 @@ import org.apache.drill.common.expression.ConvertExpression;
 import org.apache.drill.common.expression.FunctionCall;
 import org.apache.drill.common.expression.FunctionHolderExpression;
 import org.apache.drill.common.expression.IfExpression;
-import org.apache.drill.common.expression.LogicalExpression;
-import org.apache.drill.common.expression.NullExpression;
 import org.apache.drill.common.expression.IfExpression.IfCondition;
-import org.apache.drill.common.types.TypeProtos;
-import org.apache.drill.common.types.TypeProtos.DataMode;
-import org.apache.drill.common.types.TypeProtos.MajorType;
-
-import com.google.common.base.Function;
-import com.google.common.base.Optional;
-import com.google.common.base.Predicate;
-import com.google.common.collect.ImmutableList;
-import com.google.common.collect.Iterables;
+import org.apache.drill.common.expression.LogicalExpression;
+
 import com.google.common.collect.Lists;
 
 public class ConditionalExprOptimizer extends 
AbstractExprVisitor<LogicalExpression, Void, RuntimeException> {
 
   public static ConditionalExprOptimizer INSTANCE = new 
ConditionalExprOptimizer();
-  
+
   @Override
-  public LogicalExpression visitBooleanOperator(BooleanOperator op, Void 
value) throws RuntimeException {    
- 
+  public LogicalExpression visitBooleanOperator(BooleanOperator op, Void 
value) throws RuntimeException {
+
     List<LogicalExpression> newArgs = Lists.newArrayList();
-    
+
     newArgs.addAll(op.args);
-    
+
     Collections.sort(newArgs, costComparator);
-    
+
     return new BooleanOperator(op.getName(), newArgs, op.getPosition());
   }
-  
+
 
   @Override
   public LogicalExpression 
visitFunctionHolderExpression(FunctionHolderExpression holder, Void value) 
throws RuntimeException {
@@ -69,16 +60,16 @@ public class ConditionalExprOptimizer extends 
AbstractExprVisitor<LogicalExpress
     }
 
     //replace with a new function call, since its argument could be changed.
-    
-    return holder.copy(args);    
+
+    return holder.copy(args);
   }
 
   @Override
   public LogicalExpression visitUnknown(LogicalExpression e, Void value) 
throws RuntimeException {
     return e;
   }
-  
-  
+
+
   @Override
   public LogicalExpression visitIfExpression(IfExpression ifExpr, Void value) 
throws RuntimeException{
     LogicalExpression newElseExpr = ifExpr.elseExpression.accept(this, value);
@@ -90,7 +81,7 @@ public class ConditionalExprOptimizer extends 
AbstractExprVisitor<LogicalExpress
 
     return 
IfExpression.newBuilder().setElse(newElseExpr).setIfCondition(conditions).build();
   }
-  
+
   @Override
   public LogicalExpression visitFunctionCall(FunctionCall call, Void value) 
throws RuntimeException {
     throw new UnsupportedOperationException("FunctionCall is not expected 
here. "
@@ -100,14 +91,14 @@ public class ConditionalExprOptimizer extends 
AbstractExprVisitor<LogicalExpress
   @Override
   public LogicalExpression visitCastExpression(CastExpression cast, Void 
value) throws RuntimeException {
     throw new UnsupportedOperationException("CastExpression is not expected 
here. "
-        + "It should have been converted to FunctionHolderExpression in 
materialization");    
+        + "It should have been converted to FunctionHolderExpression in 
materialization");
   }
-  
+
 
   @Override
   public LogicalExpression visitConvertExpression(ConvertExpression cast, Void 
value) throws RuntimeException {
     throw new UnsupportedOperationException("ConvertExpression is not expected 
here. "
-        + "It should have been converted to FunctionHolderExpression in 
materialization");    
+        + "It should have been converted to FunctionHolderExpression in 
materialization");
   }
 
   private static Comparator<LogicalExpression> costComparator = new 
Comparator<LogicalExpression> () {
@@ -115,7 +106,7 @@ public class ConditionalExprOptimizer extends 
AbstractExprVisitor<LogicalExpress
       return e1.getCumulativeCost() <= e2.getCumulativeCost() ? -1 : 1;
     }
   };
-  
-  
-  
+
+
+
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/expression/visitors/ConstantChecker.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/expression/visitors/ConstantChecker.java
 
b/common/src/main/java/org/apache/drill/common/expression/visitors/ConstantChecker.java
index a2a0d7f..5f20c25 100644
--- 
a/common/src/main/java/org/apache/drill/common/expression/visitors/ConstantChecker.java
+++ 
b/common/src/main/java/org/apache/drill/common/expression/visitors/ConstantChecker.java
@@ -30,28 +30,28 @@ import org.apache.drill.common.expression.NullExpression;
 import org.apache.drill.common.expression.SchemaPath;
 import org.apache.drill.common.expression.TypedNullConstant;
 import org.apache.drill.common.expression.ValueExpressions.BooleanExpression;
-import org.apache.drill.common.expression.ValueExpressions.DoubleExpression;
-import org.apache.drill.common.expression.ValueExpressions.FloatExpression;
-import org.apache.drill.common.expression.ValueExpressions.IntExpression;
-import org.apache.drill.common.expression.ValueExpressions.LongExpression;
 import org.apache.drill.common.expression.ValueExpressions.DateExpression;
-import 
org.apache.drill.common.expression.ValueExpressions.IntervalYearExpression;
-import 
org.apache.drill.common.expression.ValueExpressions.IntervalDayExpression;
-import org.apache.drill.common.expression.ValueExpressions.TimeStampExpression;
-import org.apache.drill.common.expression.ValueExpressions.TimeExpression;
-import org.apache.drill.common.expression.ValueExpressions.Decimal9Expression;
 import org.apache.drill.common.expression.ValueExpressions.Decimal18Expression;
 import org.apache.drill.common.expression.ValueExpressions.Decimal28Expression;
 import org.apache.drill.common.expression.ValueExpressions.Decimal38Expression;
+import org.apache.drill.common.expression.ValueExpressions.Decimal9Expression;
+import org.apache.drill.common.expression.ValueExpressions.DoubleExpression;
+import org.apache.drill.common.expression.ValueExpressions.FloatExpression;
+import org.apache.drill.common.expression.ValueExpressions.IntExpression;
+import 
org.apache.drill.common.expression.ValueExpressions.IntervalDayExpression;
+import 
org.apache.drill.common.expression.ValueExpressions.IntervalYearExpression;
+import org.apache.drill.common.expression.ValueExpressions.LongExpression;
 import org.apache.drill.common.expression.ValueExpressions.QuotedString;
+import org.apache.drill.common.expression.ValueExpressions.TimeExpression;
+import org.apache.drill.common.expression.ValueExpressions.TimeStampExpression;
 
 final class ConstantChecker implements ExprVisitor<Boolean, ErrorCollector, 
RuntimeException> {
 
 
   private final static ConstantChecker INSTANCE = new ConstantChecker();
-  
+
   private ConstantChecker(){}
-  
+
   public static void checkConstants(LogicalExpression e, ErrorCollector 
errors){
     e.accept(INSTANCE, errors);
   }
@@ -87,7 +87,7 @@ final class ConstantChecker implements ExprVisitor<Boolean, 
ErrorCollector, Runt
     }
     return true;
   }
-  
+
   @Override
   public Boolean visitIfExpression(IfExpression ifExpr, ErrorCollector errors) 
{
     IfCondition c = ifExpr.ifCondition;

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/expression/visitors/ExprVisitor.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/expression/visitors/ExprVisitor.java
 
b/common/src/main/java/org/apache/drill/common/expression/visitors/ExprVisitor.java
index cf01930..2d0cd8c 100644
--- 
a/common/src/main/java/org/apache/drill/common/expression/visitors/ExprVisitor.java
+++ 
b/common/src/main/java/org/apache/drill/common/expression/visitors/ExprVisitor.java
@@ -28,20 +28,20 @@ import org.apache.drill.common.expression.NullExpression;
 import org.apache.drill.common.expression.SchemaPath;
 import org.apache.drill.common.expression.TypedNullConstant;
 import org.apache.drill.common.expression.ValueExpressions.BooleanExpression;
-import org.apache.drill.common.expression.ValueExpressions.DoubleExpression;
-import org.apache.drill.common.expression.ValueExpressions.FloatExpression;
-import org.apache.drill.common.expression.ValueExpressions.IntExpression;
-import org.apache.drill.common.expression.ValueExpressions.LongExpression;
 import org.apache.drill.common.expression.ValueExpressions.DateExpression;
-import org.apache.drill.common.expression.ValueExpressions.TimeStampExpression;
-import org.apache.drill.common.expression.ValueExpressions.TimeExpression;
-import 
org.apache.drill.common.expression.ValueExpressions.IntervalYearExpression;
-import 
org.apache.drill.common.expression.ValueExpressions.IntervalDayExpression;
-import org.apache.drill.common.expression.ValueExpressions.Decimal9Expression;
 import org.apache.drill.common.expression.ValueExpressions.Decimal18Expression;
 import org.apache.drill.common.expression.ValueExpressions.Decimal28Expression;
 import org.apache.drill.common.expression.ValueExpressions.Decimal38Expression;
+import org.apache.drill.common.expression.ValueExpressions.Decimal9Expression;
+import org.apache.drill.common.expression.ValueExpressions.DoubleExpression;
+import org.apache.drill.common.expression.ValueExpressions.FloatExpression;
+import org.apache.drill.common.expression.ValueExpressions.IntExpression;
+import 
org.apache.drill.common.expression.ValueExpressions.IntervalDayExpression;
+import 
org.apache.drill.common.expression.ValueExpressions.IntervalYearExpression;
+import org.apache.drill.common.expression.ValueExpressions.LongExpression;
 import org.apache.drill.common.expression.ValueExpressions.QuotedString;
+import org.apache.drill.common.expression.ValueExpressions.TimeExpression;
+import org.apache.drill.common.expression.ValueExpressions.TimeStampExpression;
 
 public interface ExprVisitor<T, VAL, EXCEP extends Exception> {
   public T visitFunctionCall(FunctionCall call, VAL value) throws EXCEP;

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/expression/visitors/ExpressionValidator.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/expression/visitors/ExpressionValidator.java
 
b/common/src/main/java/org/apache/drill/common/expression/visitors/ExpressionValidator.java
index cfcf371..eb1394c 100644
--- 
a/common/src/main/java/org/apache/drill/common/expression/visitors/ExpressionValidator.java
+++ 
b/common/src/main/java/org/apache/drill/common/expression/visitors/ExpressionValidator.java
@@ -24,27 +24,25 @@ import org.apache.drill.common.expression.ErrorCollector;
 import org.apache.drill.common.expression.FunctionCall;
 import org.apache.drill.common.expression.FunctionHolderExpression;
 import org.apache.drill.common.expression.IfExpression;
+import org.apache.drill.common.expression.IfExpression.IfCondition;
 import org.apache.drill.common.expression.LogicalExpression;
 import org.apache.drill.common.expression.NullExpression;
 import org.apache.drill.common.expression.SchemaPath;
 import org.apache.drill.common.expression.TypedNullConstant;
 import org.apache.drill.common.expression.ValueExpressions;
-import org.apache.drill.common.expression.IfExpression.IfCondition;
 import org.apache.drill.common.expression.ValueExpressions.BooleanExpression;
-import org.apache.drill.common.expression.ValueExpressions.DoubleExpression;
-import org.apache.drill.common.expression.ValueExpressions.FloatExpression;
-import org.apache.drill.common.expression.ValueExpressions.IntExpression;
-import org.apache.drill.common.expression.ValueExpressions.LongExpression;
 import org.apache.drill.common.expression.ValueExpressions.DateExpression;
-import 
org.apache.drill.common.expression.ValueExpressions.IntervalYearExpression;
-import 
org.apache.drill.common.expression.ValueExpressions.IntervalDayExpression;
-import org.apache.drill.common.expression.ValueExpressions.TimeStampExpression;
-import org.apache.drill.common.expression.ValueExpressions.TimeExpression;
-import org.apache.drill.common.expression.ValueExpressions.Decimal9Expression;
 import org.apache.drill.common.expression.ValueExpressions.Decimal18Expression;
 import org.apache.drill.common.expression.ValueExpressions.Decimal28Expression;
 import org.apache.drill.common.expression.ValueExpressions.Decimal38Expression;
+import org.apache.drill.common.expression.ValueExpressions.Decimal9Expression;
+import org.apache.drill.common.expression.ValueExpressions.DoubleExpression;
+import 
org.apache.drill.common.expression.ValueExpressions.IntervalDayExpression;
+import 
org.apache.drill.common.expression.ValueExpressions.IntervalYearExpression;
+import org.apache.drill.common.expression.ValueExpressions.LongExpression;
 import org.apache.drill.common.expression.ValueExpressions.QuotedString;
+import org.apache.drill.common.expression.ValueExpressions.TimeExpression;
+import org.apache.drill.common.expression.ValueExpressions.TimeStampExpression;
 import org.apache.drill.common.types.TypeProtos.DataMode;
 import org.apache.drill.common.types.TypeProtos.MajorType;
 import org.apache.drill.common.types.TypeProtos.MinorType;
@@ -88,10 +86,10 @@ public class ExpressionValidator implements 
ExprVisitor<Void, ErrorCollector, Ru
       }
       i++;
     }
-    
+
     return null;
   }
-  
+
   @Override
   public Void visitIfExpression(IfExpression ifExpr, ErrorCollector errors) 
throws RuntimeException {
     // confirm that all conditions are required boolean values.
@@ -166,7 +164,7 @@ public class ExpressionValidator implements 
ExprVisitor<Void, ErrorCollector, Ru
   public Void visitDecimal38Constant(Decimal38Expression decExpr, 
ErrorCollector errors) throws RuntimeException {
     return null;
   }
-    
+
   @Override
   public Void visitDateConstant(DateExpression intExpr, ErrorCollector errors) 
throws RuntimeException {
     return null;

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/expression/visitors/SimpleExprVisitor.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/expression/visitors/SimpleExprVisitor.java
 
b/common/src/main/java/org/apache/drill/common/expression/visitors/SimpleExprVisitor.java
index 28f13fb..5f83e93 100644
--- 
a/common/src/main/java/org/apache/drill/common/expression/visitors/SimpleExprVisitor.java
+++ 
b/common/src/main/java/org/apache/drill/common/expression/visitors/SimpleExprVisitor.java
@@ -22,20 +22,20 @@ import 
org.apache.drill.common.expression.FunctionHolderExpression;
 import org.apache.drill.common.expression.IfExpression;
 import org.apache.drill.common.expression.SchemaPath;
 import org.apache.drill.common.expression.ValueExpressions.BooleanExpression;
-import org.apache.drill.common.expression.ValueExpressions.IntExpression;
-import org.apache.drill.common.expression.ValueExpressions.FloatExpression;
-import org.apache.drill.common.expression.ValueExpressions.DoubleExpression;
-import org.apache.drill.common.expression.ValueExpressions.LongExpression;
 import org.apache.drill.common.expression.ValueExpressions.DateExpression;
-import 
org.apache.drill.common.expression.ValueExpressions.IntervalYearExpression;
-import 
org.apache.drill.common.expression.ValueExpressions.IntervalDayExpression;
-import org.apache.drill.common.expression.ValueExpressions.TimeStampExpression;
-import org.apache.drill.common.expression.ValueExpressions.TimeExpression;
-import org.apache.drill.common.expression.ValueExpressions.Decimal9Expression;
 import org.apache.drill.common.expression.ValueExpressions.Decimal18Expression;
 import org.apache.drill.common.expression.ValueExpressions.Decimal28Expression;
 import org.apache.drill.common.expression.ValueExpressions.Decimal38Expression;
+import org.apache.drill.common.expression.ValueExpressions.Decimal9Expression;
+import org.apache.drill.common.expression.ValueExpressions.DoubleExpression;
+import org.apache.drill.common.expression.ValueExpressions.FloatExpression;
+import org.apache.drill.common.expression.ValueExpressions.IntExpression;
+import 
org.apache.drill.common.expression.ValueExpressions.IntervalDayExpression;
+import 
org.apache.drill.common.expression.ValueExpressions.IntervalYearExpression;
+import org.apache.drill.common.expression.ValueExpressions.LongExpression;
 import org.apache.drill.common.expression.ValueExpressions.QuotedString;
+import org.apache.drill.common.expression.ValueExpressions.TimeExpression;
+import org.apache.drill.common.expression.ValueExpressions.TimeStampExpression;
 
 public abstract class SimpleExprVisitor<T> implements ExprVisitor<T, Void, 
RuntimeException>{
 
@@ -135,7 +135,7 @@ public abstract class SimpleExprVisitor<T> implements 
ExprVisitor<T, Void, Runti
     return visitQuotedStringConstant(e);
   }
 
-  
+
   public abstract T visitFunctionCall(FunctionCall call);
   public abstract T visitFunctionHolderExpression(FunctionHolderExpression 
call);
   public abstract T visitIfExpression(IfExpression ifExpr);
@@ -154,5 +154,5 @@ public abstract class SimpleExprVisitor<T> implements 
ExprVisitor<T, Void, Runti
   public abstract T visitDecimal38Constant(Decimal38Expression intExpr);
   public abstract T visitDoubleConstant(DoubleExpression dExpr);
   public abstract T visitBooleanConstant(BooleanExpression e);
-  public abstract T visitQuotedStringConstant(QuotedString e); 
+  public abstract T visitQuotedStringConstant(QuotedString e);
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/graph/AdjacencyList.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/graph/AdjacencyList.java 
b/common/src/main/java/org/apache/drill/common/graph/AdjacencyList.java
index ac50047..ae74194 100644
--- a/common/src/main/java/org/apache/drill/common/graph/AdjacencyList.java
+++ b/common/src/main/java/org/apache/drill/common/graph/AdjacencyList.java
@@ -50,7 +50,7 @@ class AdjacencyList<V extends GraphValue<V>> {
   Node getNewNode(V value){
     return new Node(value);
   }
-  
+
   public List<Edge<Node>> getAdjacent(AdjacencyList<V>.Node source) {
     return adjacencies.get(source);
   }
@@ -88,10 +88,10 @@ class AdjacencyList<V extends GraphValue<V>> {
     }
     return nodes;
   }
-  
+
   /**
    * Get a list of nodes that have no outbound edges.
-   * 
+   *
    * @return
    */
   public Collection<V> getLeafNodes(){
@@ -109,13 +109,13 @@ class AdjacencyList<V extends GraphValue<V>> {
 
   /**
    * Get a list of all nodes that have no incoming edges.
-   * 
+   *
    * @return
    */
   public List<V> getRootNodes(){
     return convert(getInternalRootNodes());
   }
-  
+
   public Collection<Edge<Node>> getAllEdges() {
     return adjacencies.values();
   }
@@ -173,12 +173,12 @@ class AdjacencyList<V extends GraphValue<V>> {
     }
 
   }
-  
+
   public static <V extends GraphValue<V>> AdjacencyList<V> 
newInstance(Collection<V> nodes){
     AdjacencyList<V> list = new AdjacencyList<V>();
     AdjacencyListBuilder<V> builder = new AdjacencyListBuilder<V>(list);
     for(V v : nodes){
-      v.accept(builder); 
+      v.accept(builder);
     }
     return builder.getAdjacencyList();
   }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/graph/AdjacencyListBuilder.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/graph/AdjacencyListBuilder.java 
b/common/src/main/java/org/apache/drill/common/graph/AdjacencyListBuilder.java
index e1a8d55..369ff06 100644
--- 
a/common/src/main/java/org/apache/drill/common/graph/AdjacencyListBuilder.java
+++ 
b/common/src/main/java/org/apache/drill/common/graph/AdjacencyListBuilder.java
@@ -25,7 +25,7 @@ import java.util.Map;
 
   private Map<V, AdjacencyList<V>.Node> ops = new HashMap<V, 
AdjacencyList<V>.Node>();
   private final AdjacencyList<V> parent;
-  
+
   public AdjacencyListBuilder(AdjacencyList<V> parent) {
     this.parent = parent;
   }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/graph/Edge.java
----------------------------------------------------------------------
diff --git a/common/src/main/java/org/apache/drill/common/graph/Edge.java 
b/common/src/main/java/org/apache/drill/common/graph/Edge.java
index 044ded1..7b9ca61 100644
--- a/common/src/main/java/org/apache/drill/common/graph/Edge.java
+++ b/common/src/main/java/org/apache/drill/common/graph/Edge.java
@@ -37,6 +37,6 @@ class Edge<N> implements Comparable<Edge<N>> {
   public String toString() {
     return "Edge [from=" + from + ", to=" + to + "]";
   }
-  
-  
+
+
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/graph/Graph.java
----------------------------------------------------------------------
diff --git a/common/src/main/java/org/apache/drill/common/graph/Graph.java 
b/common/src/main/java/org/apache/drill/common/graph/Graph.java
index 71c7923..3cf4e7a 100644
--- a/common/src/main/java/org/apache/drill/common/graph/Graph.java
+++ b/common/src/main/java/org/apache/drill/common/graph/Graph.java
@@ -48,7 +48,7 @@ public class Graph<G extends GraphValue<G>, R extends G, T 
extends G> {
     }
     return (List<O>) ops;
   }
-  
+
   public AdjacencyList<G> getAdjList() {
     return adjList;
   }
@@ -64,5 +64,5 @@ public class Graph<G extends GraphValue<G>, R extends G, T 
extends G> {
   public static <G extends GraphValue<G>, R extends G, T extends G> Graph<G, 
R, T> newGraph(List<G> operators, Class<R> root, Class<T> leaf){
     return new Graph<G, R, T>(operators, root, leaf);
   }
-  
+
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/graph/GraphAlgos.java
----------------------------------------------------------------------
diff --git a/common/src/main/java/org/apache/drill/common/graph/GraphAlgos.java 
b/common/src/main/java/org/apache/drill/common/graph/GraphAlgos.java
index 1ea0740..484d2af 100644
--- a/common/src/main/java/org/apache/drill/common/graph/GraphAlgos.java
+++ b/common/src/main/java/org/apache/drill/common/graph/GraphAlgos.java
@@ -65,7 +65,7 @@ public class GraphAlgos {
 
     /**
      * Execute a depth-first sort on the reversed DAG.
-     * 
+     *
      * @param graph
      *          The adjacency list for the DAG.
      * @param sourceNodes

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/graph/GraphValue.java
----------------------------------------------------------------------
diff --git a/common/src/main/java/org/apache/drill/common/graph/GraphValue.java 
b/common/src/main/java/org/apache/drill/common/graph/GraphValue.java
index dacf74b..a919008 100644
--- a/common/src/main/java/org/apache/drill/common/graph/GraphValue.java
+++ b/common/src/main/java/org/apache/drill/common/graph/GraphValue.java
@@ -20,7 +20,7 @@ package org.apache.drill.common.graph;
 
 public interface GraphValue<T> extends Iterable<T>{
   static final org.slf4j.Logger logger = 
org.slf4j.LoggerFactory.getLogger(GraphValue.class);
-  
+
   public void accept(GraphVisitor<T> visitor);
 
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/FormatPluginConfig.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/FormatPluginConfig.java 
b/common/src/main/java/org/apache/drill/common/logical/FormatPluginConfig.java
index 20b4d66..936e4f2 100644
--- 
a/common/src/main/java/org/apache/drill/common/logical/FormatPluginConfig.java
+++ 
b/common/src/main/java/org/apache/drill/common/logical/FormatPluginConfig.java
@@ -22,6 +22,6 @@ import com.fasterxml.jackson.annotation.JsonTypeInfo;
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, 
property="type")
 public interface FormatPluginConfig {
   static final org.slf4j.Logger logger = 
org.slf4j.LoggerFactory.getLogger(FormatPluginConfig.class);
-  
-  
+
+
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/FormatPluginConfigBase.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/FormatPluginConfigBase.java
 
b/common/src/main/java/org/apache/drill/common/logical/FormatPluginConfigBase.java
index e640359..0704085 100644
--- 
a/common/src/main/java/org/apache/drill/common/logical/FormatPluginConfigBase.java
+++ 
b/common/src/main/java/org/apache/drill/common/logical/FormatPluginConfigBase.java
@@ -23,12 +23,10 @@ import org.apache.drill.common.config.CommonConstants;
 import org.apache.drill.common.config.DrillConfig;
 import org.apache.drill.common.util.PathScanner;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
-
 public abstract class FormatPluginConfigBase implements FormatPluginConfig{
   static final org.slf4j.Logger logger = 
org.slf4j.LoggerFactory.getLogger(FormatPluginConfigBase.class);
-  
-  
+
+
   public synchronized static Class<?>[] getSubTypes(DrillConfig config){
     List<String> packages = 
config.getStringList(CommonConstants.STORAGE_PLUGIN_CONFIG_SCAN_PACKAGES);
     Class<?>[] sec = 
PathScanner.scanForImplementationsArr(FormatPluginConfig.class, packages);
@@ -36,6 +34,7 @@ public abstract class FormatPluginConfigBase implements 
FormatPluginConfig{
     return sec;
   }
 
+  @Override
   public abstract boolean equals(Object o);
-  
+
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/LogicalPlan.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/LogicalPlan.java 
b/common/src/main/java/org/apache/drill/common/logical/LogicalPlan.java
index 06ea117..313ed40 100644
--- a/common/src/main/java/org/apache/drill/common/logical/LogicalPlan.java
+++ b/common/src/main/java/org/apache/drill/common/logical/LogicalPlan.java
@@ -22,7 +22,6 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
-import org.apache.drill.common.logical.PlanProperties;
 import org.apache.drill.common.config.DrillConfig;
 import org.apache.drill.common.graph.Graph;
 import org.apache.drill.common.graph.GraphAlgos;
@@ -46,8 +45,8 @@ public class LogicalPlan {
   private final PlanProperties properties;
   private final Map<String, StoragePluginConfig> storageEngineMap;
   private final Graph<LogicalOperator, SinkOperator, SourceOperator> graph;
-  
-  
+
+
   @JsonCreator
   public LogicalPlan(@JsonProperty("head") PlanProperties head,
       @JsonProperty("storage") Map<String, StoragePluginConfig> 
storageEngineMap,
@@ -101,7 +100,7 @@ public class LogicalPlan {
       LogicalPlan plan = mapper.readValue(planString, LogicalPlan.class);
       return plan;
     } catch (IOException e) {
-      
+
       throw new RuntimeException(String.format("Failure while parsing plan: \n 
%s}", planString), e);
     }
   }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/LogicalPlanBuilder.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/LogicalPlanBuilder.java 
b/common/src/main/java/org/apache/drill/common/logical/LogicalPlanBuilder.java
index 1941a92..28f1402 100644
--- 
a/common/src/main/java/org/apache/drill/common/logical/LogicalPlanBuilder.java
+++ 
b/common/src/main/java/org/apache/drill/common/logical/LogicalPlanBuilder.java
@@ -36,12 +36,12 @@ public class LogicalPlanBuilder {
     this.planProperties = planProperties;
     return this;
   }
-  
+
   public LogicalPlanBuilder planProperties(PlanType type, int version, String 
generatorType, String generatorInfo, ResultMode mode){
     this.planProperties = PlanProperties.builder().generator(generatorType, 
generatorInfo).type(type).version(version).resultMode(mode).build();
     return this;
   }
-  
+
   public LogicalPlanBuilder addStorageEngine(String name, StoragePluginConfig 
config) {
     this.storageEngines.put(name, config);
     return this;

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/StoragePluginConfig.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/StoragePluginConfig.java 
b/common/src/main/java/org/apache/drill/common/logical/StoragePluginConfig.java
index d9b8123..308e901 100644
--- 
a/common/src/main/java/org/apache/drill/common/logical/StoragePluginConfig.java
+++ 
b/common/src/main/java/org/apache/drill/common/logical/StoragePluginConfig.java
@@ -34,6 +34,7 @@ public abstract class StoragePluginConfig{
     this.enabled = enabled;
   }
 
+  @Override
   public abstract boolean equals(Object o);
 
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/StoragePluginConfigBase.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/StoragePluginConfigBase.java
 
b/common/src/main/java/org/apache/drill/common/logical/StoragePluginConfigBase.java
index 278bb08..c006f16 100644
--- 
a/common/src/main/java/org/apache/drill/common/logical/StoragePluginConfigBase.java
+++ 
b/common/src/main/java/org/apache/drill/common/logical/StoragePluginConfigBase.java
@@ -33,6 +33,7 @@ public abstract class StoragePluginConfigBase extends 
StoragePluginConfig {
     return sec;
   }
 
+  @Override
   public abstract boolean equals(Object o);
 
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/UnexpectedOperatorType.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/UnexpectedOperatorType.java
 
b/common/src/main/java/org/apache/drill/common/logical/UnexpectedOperatorType.java
index 21b2aa5..ea3f4b2 100644
--- 
a/common/src/main/java/org/apache/drill/common/logical/UnexpectedOperatorType.java
+++ 
b/common/src/main/java/org/apache/drill/common/logical/UnexpectedOperatorType.java
@@ -23,13 +23,13 @@ public class UnexpectedOperatorType extends ValidationError{
   public UnexpectedOperatorType(String message){
     super(message);
   }
-  
+
   public UnexpectedOperatorType(Object operator, String message) {
     super(message + " Received node of type " + 
operator.getClass().getCanonicalName());
   }
 
 
-  
 
-  
+
+
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/AbstractBuilder.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/AbstractBuilder.java
 
b/common/src/main/java/org/apache/drill/common/logical/data/AbstractBuilder.java
index 69cb4eb..427b040 100644
--- 
a/common/src/main/java/org/apache/drill/common/logical/data/AbstractBuilder.java
+++ 
b/common/src/main/java/org/apache/drill/common/logical/data/AbstractBuilder.java
@@ -23,9 +23,9 @@ import org.apache.drill.common.expression.LogicalExpression;
 
 public abstract class AbstractBuilder<T extends LogicalOperator> {
   static final org.slf4j.Logger logger = 
org.slf4j.LoggerFactory.getLogger(AbstractBuilder.class);
-  
+
   public abstract T build();
-  
+
   protected LogicalExpression[] aL(List<LogicalExpression> exprs){
     return exprs.toArray(new LogicalExpression[exprs.size()]);
   }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/AbstractSingleBuilder.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/AbstractSingleBuilder.java
 
b/common/src/main/java/org/apache/drill/common/logical/data/AbstractSingleBuilder.java
index e733fdd..3ed947e 100644
--- 
a/common/src/main/java/org/apache/drill/common/logical/data/AbstractSingleBuilder.java
+++ 
b/common/src/main/java/org/apache/drill/common/logical/data/AbstractSingleBuilder.java
@@ -21,21 +21,22 @@ import com.google.common.base.Preconditions;
 
 public abstract class AbstractSingleBuilder<T extends SingleInputOperator, X 
extends AbstractSingleBuilder<T, X>> extends AbstractBuilder<T> {
   static final org.slf4j.Logger logger = 
org.slf4j.LoggerFactory.getLogger(AbstractSingleBuilder.class);
-  
+
   private LogicalOperator input;
 
+  @Override
   public final T build(){
     Preconditions.checkNotNull(input);
     T out = internalBuild();
     out.setInput(input);
     return out;
   }
-  
+
   public X setInput(LogicalOperator input){
     this.input = input;
     return (X) this;
   }
-  
+
   public abstract T internalBuild();
 
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/Constant.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/Constant.java 
b/common/src/main/java/org/apache/drill/common/logical/data/Constant.java
index f9e7394..460803d 100644
--- a/common/src/main/java/org/apache/drill/common/logical/data/Constant.java
+++ b/common/src/main/java/org/apache/drill/common/logical/data/Constant.java
@@ -17,8 +17,6 @@
  */
 package org.apache.drill.common.logical.data;
 
-import java.util.Iterator;
-
 import org.apache.drill.common.JSONOptions;
 import org.apache.drill.common.logical.data.visitors.LogicalVisitor;
 
@@ -48,5 +46,5 @@ public class Constant extends SourceOperator {
       return logicalVisitor.visitConstant(this, value);
     }
 
-    
+
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/Filter.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/Filter.java 
b/common/src/main/java/org/apache/drill/common/logical/data/Filter.java
index 0fba804..613c500 100644
--- a/common/src/main/java/org/apache/drill/common/logical/data/Filter.java
+++ b/common/src/main/java/org/apache/drill/common/logical/data/Filter.java
@@ -17,15 +17,15 @@
  */
 package org.apache.drill.common.logical.data;
 
-import com.google.common.collect.Iterators;
+import java.util.Iterator;
+
 import org.apache.drill.common.expression.LogicalExpression;
+import org.apache.drill.common.logical.data.visitors.LogicalVisitor;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonTypeName;
-import org.apache.drill.common.logical.data.visitors.LogicalVisitor;
-
-import java.util.Iterator;
+import com.google.common.collect.Iterators;
 
 @JsonTypeName("filter")
 public class Filter extends SingleInputOperator{
@@ -50,6 +50,6 @@ public class Filter extends SingleInputOperator{
         return Iterators.singletonIterator(getInput());
     }
 
-  
-       
+
+
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/Flatten.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/Flatten.java 
b/common/src/main/java/org/apache/drill/common/logical/data/Flatten.java
index 07485d6..803a4b3 100644
--- a/common/src/main/java/org/apache/drill/common/logical/data/Flatten.java
+++ b/common/src/main/java/org/apache/drill/common/logical/data/Flatten.java
@@ -17,16 +17,16 @@
  */
 package org.apache.drill.common.logical.data;
 
-import com.google.common.collect.Iterators;
+import java.util.Iterator;
+
 import org.apache.drill.common.expression.FieldReference;
 import org.apache.drill.common.expression.LogicalExpression;
+import org.apache.drill.common.logical.data.visitors.LogicalVisitor;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonTypeName;
-import org.apache.drill.common.logical.data.visitors.LogicalVisitor;
-
-import java.util.Iterator;
+import com.google.common.collect.Iterators;
 
 @JsonTypeName("flatten")
 public class Flatten extends SingleInputOperator {

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/GroupingAggregate.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/GroupingAggregate.java
 
b/common/src/main/java/org/apache/drill/common/logical/data/GroupingAggregate.java
index 4aabfba..2913a7e 100644
--- 
a/common/src/main/java/org/apache/drill/common/logical/data/GroupingAggregate.java
+++ 
b/common/src/main/java/org/apache/drill/common/logical/data/GroupingAggregate.java
@@ -32,16 +32,16 @@ import com.google.common.collect.Lists;
 @JsonTypeName("groupingaggregate")
 public class GroupingAggregate extends SingleInputOperator{
   static final org.slf4j.Logger logger = 
org.slf4j.LoggerFactory.getLogger(GroupingAggregate.class);
-  
+
   private final NamedExpression[] keys;
   private final NamedExpression[] exprs;
-  
+
   public GroupingAggregate(@JsonProperty("keys") NamedExpression[] keys, 
@JsonProperty("exprs") NamedExpression[] exprs) {
     super();
     this.keys = keys;
     this.exprs = exprs;
   }
-  
+
   @Override
   public <T, X, E extends Throwable> T accept(LogicalVisitor<T, X, E> 
logicalVisitor, X value) throws E {
       return logicalVisitor.visitGroupingAggregate(this, value);
@@ -55,19 +55,19 @@ public class GroupingAggregate extends SingleInputOperator{
   public static Builder builder(){
     return new Builder();
   }
-  
+
   public NamedExpression[] getKeys(){
     return keys;
   }
-  
+
   public NamedExpression[] getExprs(){
     return exprs;
   }
-  
+
   public static class Builder extends AbstractSingleBuilder<GroupingAggregate, 
Builder>{
     private List<NamedExpression> keys = Lists.newArrayList();
     private List<NamedExpression> exprs = Lists.newArrayList();
-    
+
     public Builder addKey(FieldReference ref, LogicalExpression expr){
       keys.add(new NamedExpression(expr, ref));
       return this;
@@ -77,24 +77,25 @@ public class GroupingAggregate extends SingleInputOperator{
       keys.add(expr);
       return this;
     }
-    
+
     public Builder addExpr(NamedExpression expr){
       exprs.add(expr);
       return this;
     }
-    
+
     public Builder addExpr(FieldReference ref, LogicalExpression expr){
       exprs.add(new NamedExpression(expr, ref));
       return this;
     }
 
+    @Override
     public GroupingAggregate internalBuild(){
       GroupingAggregate ga =  new GroupingAggregate(aN(keys), aN(exprs));
       return ga;
     }
-    
+
   }
-  
-  
-     
+
+
+
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/Join.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/Join.java 
b/common/src/main/java/org/apache/drill/common/logical/data/Join.java
index 3e68b09..ee5b527 100644
--- a/common/src/main/java/org/apache/drill/common/logical/data/Join.java
+++ b/common/src/main/java/org/apache/drill/common/logical/data/Join.java
@@ -47,14 +47,14 @@ public class Join extends LogicalOperatorBase {
     }
     throw new ExpressionParsingException(String.format("Unable to determine 
join type for value '%s'.", val));
   }
-  
+
   @JsonCreator
   public Join(@JsonProperty("left") LogicalOperator left, 
@JsonProperty("right") LogicalOperator right,
       @JsonProperty("conditions") JoinCondition[] conditions, 
@JsonProperty("type") String type) {
     this(left, right, conditions, resolve(type));
   }
 
-  
+
   public Join(LogicalOperator left, @JsonProperty("right") LogicalOperator 
right, JoinCondition[] conditions, JoinRelType type) {
     super();
     this.conditions = conditions;
@@ -65,7 +65,7 @@ public class Join extends LogicalOperatorBase {
     this.type = type;
 
   }
-  
+
   public LogicalOperator getLeft() {
     return left;
   }
@@ -96,22 +96,22 @@ public class Join extends LogicalOperatorBase {
   public Iterator<LogicalOperator> iterator() {
     return Iterators.forArray(getLeft(), getRight());
   }
-  
+
   public static Builder builder(){
     return new Builder();
   }
-  
+
   public static class Builder extends AbstractBuilder<Join>{
     private LogicalOperator left;
     private LogicalOperator right;
     private JoinRelType type;
     private List<JoinCondition> conditions = Lists.newArrayList();
-    
+
     public Builder type(JoinRelType type){
       this.type = type;
       return this;
     }
-    
+
     public Builder left(LogicalOperator left){
       this.left = left;
       return this;
@@ -120,13 +120,13 @@ public class Join extends LogicalOperatorBase {
       this.right = right;
       return this;
     }
-    
+
     public Builder addCondition(String relationship, LogicalExpression left, 
LogicalExpression right){
       conditions.add(new JoinCondition(relationship, left, right));
       return this;
     }
-    
-    
+
+
     @Override
     public Join build() {
       Preconditions.checkNotNull(left);
@@ -134,6 +134,6 @@ public class Join extends LogicalOperatorBase {
       Preconditions.checkNotNull(type);
       return new Join(left, right, conditions.toArray(new 
JoinCondition[conditions.size()]), type);
     }
-    
+
   }
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/JoinCondition.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/JoinCondition.java 
b/common/src/main/java/org/apache/drill/common/logical/data/JoinCondition.java
index 90e3d5b..611e70b 100644
--- 
a/common/src/main/java/org/apache/drill/common/logical/data/JoinCondition.java
+++ 
b/common/src/main/java/org/apache/drill/common/logical/data/JoinCondition.java
@@ -47,7 +47,7 @@ public class JoinCondition {
   public LogicalExpression getRight() {
     return right;
   }
-  
+
   public JoinCondition flip(){
     return new JoinCondition(relationship, right, left);
   }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/Limit.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/Limit.java 
b/common/src/main/java/org/apache/drill/common/logical/data/Limit.java
index 110204b..56ae8d9 100644
--- a/common/src/main/java/org/apache/drill/common/logical/data/Limit.java
+++ b/common/src/main/java/org/apache/drill/common/logical/data/Limit.java
@@ -17,15 +17,16 @@
  */
 package org.apache.drill.common.logical.data;
 
+import java.util.Iterator;
+
+import org.apache.drill.common.logical.data.visitors.LogicalVisitor;
+
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonTypeName;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import com.google.common.collect.Iterators;
-import org.apache.drill.common.logical.data.visitors.LogicalVisitor;
-
-import java.util.Iterator;
 
 @JsonTypeName("limit")
 public class Limit extends SingleInputOperator {

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/LogicalOperatorBase.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/LogicalOperatorBase.java
 
b/common/src/main/java/org/apache/drill/common/logical/data/LogicalOperatorBase.java
index 69a1c3c..cbfa066 100644
--- 
a/common/src/main/java/org/apache/drill/common/logical/data/LogicalOperatorBase.java
+++ 
b/common/src/main/java/org/apache/drill/common/logical/data/LogicalOperatorBase.java
@@ -19,7 +19,6 @@ package org.apache.drill.common.logical.data;
 
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.Iterator;
 import java.util.List;
 
 import org.apache.drill.common.config.CommonConstants;
@@ -37,11 +36,12 @@ public abstract class LogicalOperatorBase implements 
LogicalOperator{
 
     private List<LogicalOperator> children = new ArrayList<LogicalOperator>();
        private String memo;
-       
-       public final int hashCode(){
+
+       @Override
+  public final int hashCode(){
          return super.hashCode();
        }
-       
+
        @Override
        public void setupAndValidate(List<LogicalOperator> operators, 
Collection<ValidationError> errors) {
          // TODO: remove this and implement individually.
@@ -69,7 +69,7 @@ public abstract class LogicalOperatorBase implements 
LogicalOperator{
     return this.getClass().getSimpleName() + " [memo=" + memo + "]";
   }
 
-  @JsonInclude(Include.NON_EMPTY) 
+  @JsonInclude(Include.NON_EMPTY)
   @JsonProperty("memo")
   public String getMemo(){
     return memo;
@@ -78,14 +78,14 @@ public abstract class LogicalOperatorBase implements 
LogicalOperator{
   public void setMemo(String memo) {
     this.memo = memo;
   }
- 
+
   public synchronized static Class<?>[] getSubTypes(DrillConfig config){
     Class<?>[] ops = 
PathScanner.scanForImplementationsArr(LogicalOperator.class, 
config.getStringList(CommonConstants.LOGICAL_OPERATOR_SCAN_PACKAGES));
     logger.debug("Adding Logical Operator sub types: {}", ((Object) ops) );
     return ops;
   }
-  
-  
-  
+
+
+
 
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/NamedExpression.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/NamedExpression.java
 
b/common/src/main/java/org/apache/drill/common/logical/data/NamedExpression.java
index 4c006c6..1550ddf 100644
--- 
a/common/src/main/java/org/apache/drill/common/logical/data/NamedExpression.java
+++ 
b/common/src/main/java/org/apache/drill/common/logical/data/NamedExpression.java
@@ -24,11 +24,11 @@ import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 
-@JsonPropertyOrder({"ref", "expr"}) 
+@JsonPropertyOrder({"ref", "expr"})
 public class NamedExpression {
   private final LogicalExpression expr;
   private final FieldReference ref;
-  
+
   @JsonCreator
   public NamedExpression( @JsonProperty("expr") LogicalExpression expr, 
@JsonProperty("ref") FieldReference ref) {
     super();

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/Order.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/Order.java 
b/common/src/main/java/org/apache/drill/common/logical/data/Order.java
index 06f1144..dada606 100644
--- a/common/src/main/java/org/apache/drill/common/logical/data/Order.java
+++ b/common/src/main/java/org/apache/drill/common/logical/data/Order.java
@@ -45,11 +45,11 @@ public class Order extends SingleInputOperator {
     this.orderings = orderings;
     this.within = within;
   }
-  
+
   public Ordering[] getOrderings() {
     return orderings;
   }
-  
+
   public FieldReference getWithin() {
     return within;
   }
@@ -70,7 +70,7 @@ public class Order extends SingleInputOperator {
     private final RelFieldCollation.Direction direction;
     private final LogicalExpression expr;
     private final RelFieldCollation.NullDirection nulls;
-    
+
     @JsonCreator
     public Ordering(@JsonProperty("order") String strOrder, 
@JsonProperty("expr") LogicalExpression expr, @JsonProperty("nullDirection") 
String nullCollation) {
       this.expr = expr;
@@ -83,7 +83,7 @@ public class Order extends SingleInputOperator {
       this.nulls = nullCollation;
       this.direction = direction;
     }
-    
+
     public Ordering(Direction direction, LogicalExpression e) {
       this(direction, e, NullDirection.FIRST);
     }
@@ -98,7 +98,7 @@ public class Order extends SingleInputOperator {
     }
 
     public String getOrder() {
-      
+
       switch(direction){
       case DESCENDING: return "DESC";
       default: return "ASC";
@@ -108,24 +108,24 @@ public class Order extends SingleInputOperator {
     public NullDirection getNullDirection() {
       return nulls;
     }
-    
-    
+
+
 
   }
-  
+
   public static Builder builder(){
     return new Builder();
   }
-  
+
   public static class Builder extends AbstractSingleBuilder<Order, Builder>{
     private List<Ordering> orderings = Lists.newArrayList();
     private FieldReference within;
-    
+
     public Builder setWithin(FieldReference within){
       this.within = within;
       return this;
     }
-    
+
     public Builder addOrdering(Direction direction, LogicalExpression e, 
NullDirection collation){
       orderings.add(new Ordering(direction, e, collation));
       return this;
@@ -135,14 +135,14 @@ public class Order extends SingleInputOperator {
     public Order internalBuild() {
       return new Order(within, orderings.toArray(new 
Ordering[orderings.size()]));
     }
-    
-    
+
+
   }
-  
+
   public static Direction getDirectionFromString(String direction){
     return "DESC".equalsIgnoreCase(direction) ? Direction.DESCENDING : 
Direction.ASCENDING;
   }
-  
+
   public static String getStringFromDirection(Direction direction){
     return direction == Direction.DESCENDING ? "DESC" : "ASC";
   }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/Project.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/Project.java 
b/common/src/main/java/org/apache/drill/common/logical/data/Project.java
index ab2ef35..5a78ee5 100644
--- a/common/src/main/java/org/apache/drill/common/logical/data/Project.java
+++ b/common/src/main/java/org/apache/drill/common/logical/data/Project.java
@@ -17,19 +17,16 @@
  */
 package org.apache.drill.common.logical.data;
 
-import java.util.Iterator;
 import java.util.List;
 
 import org.apache.drill.common.exceptions.ExpressionParsingException;
 import org.apache.drill.common.expression.FieldReference;
 import org.apache.drill.common.expression.LogicalExpression;
-import org.apache.drill.common.expression.PathSegment;
 import org.apache.drill.common.logical.data.visitors.LogicalVisitor;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonTypeName;
-import com.google.common.collect.Iterators;
 import com.google.common.collect.Lists;
 
 @JsonTypeName("project")

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/RunningAggregate.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/RunningAggregate.java
 
b/common/src/main/java/org/apache/drill/common/logical/data/RunningAggregate.java
index 13906e1..e280627 100644
--- 
a/common/src/main/java/org/apache/drill/common/logical/data/RunningAggregate.java
+++ 
b/common/src/main/java/org/apache/drill/common/logical/data/RunningAggregate.java
@@ -17,19 +17,19 @@
  */
 package org.apache.drill.common.logical.data;
 
-import com.google.common.collect.Iterators;
+import java.util.Iterator;
+
 import org.apache.drill.common.expression.FieldReference;
+import org.apache.drill.common.logical.data.visitors.LogicalVisitor;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonTypeName;
-import org.apache.drill.common.logical.data.visitors.LogicalVisitor;
-
-import java.util.Iterator;
+import com.google.common.collect.Iterators;
 
 @JsonTypeName("runningaggregate")
 public class RunningAggregate extends SingleInputOperator{
-  
+
   private final FieldReference within;
   private final NamedExpression[]  aggregations;
 

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/Scan.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/Scan.java 
b/common/src/main/java/org/apache/drill/common/logical/data/Scan.java
index f7e69b3..50b53d4 100644
--- a/common/src/main/java/org/apache/drill/common/logical/data/Scan.java
+++ b/common/src/main/java/org/apache/drill/common/logical/data/Scan.java
@@ -18,7 +18,6 @@
 package org.apache.drill.common.logical.data;
 
 import org.apache.drill.common.JSONOptions;
-import org.apache.drill.common.expression.FieldReference;
 import org.apache.drill.common.logical.data.visitors.LogicalVisitor;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -30,7 +29,7 @@ import com.fasterxml.jackson.annotation.JsonTypeName;
 public class Scan extends SourceOperator{
        private final String storageEngine;
        private final JSONOptions selection;
-       
+
        @JsonCreator
   public Scan(@JsonProperty("storageengine") String storageEngine, 
@JsonProperty("selection") JSONOptions selection) {
     super();
@@ -55,8 +54,8 @@ public class Scan extends SourceOperator{
   public static Builder builder() {
     return new Builder();
   }
-  
-  
+
+
   public static class Builder extends AbstractBuilder<Scan>{
     private String storageEngine;
     private JSONOptions selection;
@@ -71,6 +70,7 @@ public class Scan extends SourceOperator{
       return this;
     }
 
+    @Override
     public Scan build() {
       return new Scan(storageEngine, selection);
     }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/Sequence.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/Sequence.java 
b/common/src/main/java/org/apache/drill/common/logical/data/Sequence.java
index 096d54b..6bacdff 100644
--- a/common/src/main/java/org/apache/drill/common/logical/data/Sequence.java
+++ b/common/src/main/java/org/apache/drill/common/logical/data/Sequence.java
@@ -20,7 +20,6 @@ package org.apache.drill.common.logical.data;
 import java.io.IOException;
 import java.util.Iterator;
 
-import com.google.common.collect.Iterators;
 import org.apache.drill.common.logical.data.Sequence.De;
 import org.apache.drill.common.logical.data.visitors.LogicalVisitor;
 import org.slf4j.Logger;
@@ -41,11 +40,12 @@ import com.fasterxml.jackson.databind.JsonDeserializer;
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.deser.impl.ReadableObjectId;
 import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
+import com.google.common.collect.Iterators;
 
 /**
  * Describes a list of operators where each operator only has one input and 
that
  * input is the operator that came before.
- * 
+ *
  */
 @JsonDeserialize(using = De.class)
 @JsonTypeName("sequence")
@@ -53,7 +53,7 @@ public class Sequence extends LogicalOperatorBase {
   static final Logger logger = LoggerFactory.getLogger(Sequence.class);
 
   private Sequence(){}
-  
+
   public boolean openTop;
   public LogicalOperator input;
   @JsonProperty("do")

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/SingleInputOperator.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/SingleInputOperator.java
 
b/common/src/main/java/org/apache/drill/common/logical/data/SingleInputOperator.java
index 0a5015c..98db733 100644
--- 
a/common/src/main/java/org/apache/drill/common/logical/data/SingleInputOperator.java
+++ 
b/common/src/main/java/org/apache/drill/common/logical/data/SingleInputOperator.java
@@ -30,7 +30,7 @@ import com.google.common.collect.Iterators;
 public abstract class SingleInputOperator extends LogicalOperatorBase {
 
   private LogicalOperator input;
-  
+
   @JsonProperty("input")
   public LogicalOperator getInput() {
     return input;
@@ -43,10 +43,10 @@ public abstract class SingleInputOperator extends 
LogicalOperatorBase {
     input.registerAsSubscriber(this);
   }
 
-  
+
   @Override
   public Iterator<LogicalOperator> iterator() {
     return Iterators.singletonIterator(input);
   }
-  
+
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/SinkOperator.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/SinkOperator.java 
b/common/src/main/java/org/apache/drill/common/logical/data/SinkOperator.java
index df900fa..2ca4006 100644
--- 
a/common/src/main/java/org/apache/drill/common/logical/data/SinkOperator.java
+++ 
b/common/src/main/java/org/apache/drill/common/logical/data/SinkOperator.java
@@ -22,7 +22,7 @@ package org.apache.drill.common.logical.data;
  * An operator that cannot be subscribed to.
  */
 public abstract class SinkOperator extends SingleInputOperator{
-  
+
   @Override
   public void registerAsSubscriber(LogicalOperator operator) {
     throw new UnsupportedOperationException("You can not subscribe to a sink 
operator such as " + this.getClass().getSimpleName());

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/SourceOperator.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/SourceOperator.java 
b/common/src/main/java/org/apache/drill/common/logical/data/SourceOperator.java
index 9af2878..d4f8246 100644
--- 
a/common/src/main/java/org/apache/drill/common/logical/data/SourceOperator.java
+++ 
b/common/src/main/java/org/apache/drill/common/logical/data/SourceOperator.java
@@ -31,5 +31,5 @@ public abstract class SourceOperator extends 
LogicalOperatorBase{
   public Iterator<LogicalOperator> iterator() {
       return Iterators.emptyIterator();
   }
-  
+
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/Store.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/Store.java 
b/common/src/main/java/org/apache/drill/common/logical/data/Store.java
index 171599f..8f99eed 100644
--- a/common/src/main/java/org/apache/drill/common/logical/data/Store.java
+++ b/common/src/main/java/org/apache/drill/common/logical/data/Store.java
@@ -30,7 +30,7 @@ import com.google.common.collect.Iterators;
 @JsonTypeName("store")
 public class Store extends SinkOperator{
   static final org.slf4j.Logger logger = 
org.slf4j.LoggerFactory.getLogger(Store.class);
-  
+
   private final String storageEngine;
   private final JSONOptions target;
 
@@ -62,7 +62,7 @@ public class Store extends SinkOperator{
   public static Builder builder() {
     return new Builder();
   }
-  
+
   public static class Builder extends AbstractSingleBuilder<Store, Builder>{
     private String storageEngine;
     private JSONOptions target;
@@ -77,8 +77,9 @@ public class Store extends SinkOperator{
       return this;
     }
 
+    @Override
     public Store internalBuild() {
       return new Store(storageEngine, target);
-    }    
+    }
   }
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/Transform.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/Transform.java 
b/common/src/main/java/org/apache/drill/common/logical/data/Transform.java
index e99b4ee..02496a6 100644
--- a/common/src/main/java/org/apache/drill/common/logical/data/Transform.java
+++ b/common/src/main/java/org/apache/drill/common/logical/data/Transform.java
@@ -17,19 +17,20 @@
  */
 package org.apache.drill.common.logical.data;
 
+import java.util.Iterator;
+
+import org.apache.drill.common.logical.data.visitors.LogicalVisitor;
+
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonTypeName;
 import com.google.common.collect.Iterators;
-import org.apache.drill.common.logical.data.visitors.LogicalVisitor;
-
-import java.util.Iterator;
 
 @JsonTypeName("transform")
 public class Transform extends SingleInputOperator{
-  
+
        private final NamedExpression[] transforms;
-       
+
        @JsonCreator
        public Transform(@JsonProperty("transforms") NamedExpression[] 
transforms) {
     super();

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/Union.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/Union.java 
b/common/src/main/java/org/apache/drill/common/logical/data/Union.java
index 40c43cd..113ffe0 100644
--- a/common/src/main/java/org/apache/drill/common/logical/data/Union.java
+++ b/common/src/main/java/org/apache/drill/common/logical/data/Union.java
@@ -37,7 +37,7 @@ public class Union extends LogicalOperatorBase {
 //  public Union(@JsonProperty("inputs") LogicalOperator[] inputs){
 //    this(inputs, false);
 //  }
-  
+
   @JsonCreator
   public Union(@JsonProperty("inputs") LogicalOperator[] inputs, 
@JsonProperty("distinct") Boolean distinct){
     this.inputs = inputs;
@@ -69,26 +69,26 @@ public class Union extends LogicalOperatorBase {
     public static Builder builder(){
       return new Builder();
     }
-    
+
     public static class Builder extends AbstractBuilder<Union>{
       private List<LogicalOperator> inputs = Lists.newArrayList();
       private boolean distinct;
-      
+
       public Builder addInput(LogicalOperator o){
         inputs.add(o);
         return this;
       }
-      
+
       public Builder setDistinct(boolean distinct){
         this.distinct = distinct;
         return this;
       }
-      
+
       @Override
       public Union build() {
         return new Union(inputs.toArray(new LogicalOperator[inputs.size()]), 
distinct);
       }
-      
+
     }
 
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/WindowFrame.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/WindowFrame.java 
b/common/src/main/java/org/apache/drill/common/logical/data/WindowFrame.java
index 0952406..6fb64bc 100644
--- a/common/src/main/java/org/apache/drill/common/logical/data/WindowFrame.java
+++ b/common/src/main/java/org/apache/drill/common/logical/data/WindowFrame.java
@@ -17,25 +17,25 @@
  */
 package org.apache.drill.common.logical.data;
 
-import com.google.common.collect.Iterators;
+import java.util.Iterator;
+
 import org.apache.drill.common.expression.FieldReference;
+import org.apache.drill.common.logical.data.visitors.LogicalVisitor;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonTypeName;
-import org.apache.drill.common.logical.data.visitors.LogicalVisitor;
-
-import java.util.Iterator;
+import com.google.common.collect.Iterators;
 
 @JsonTypeName("windowframe")
 public class WindowFrame extends SingleInputOperator{
-  
-  
+
+
   private final FieldReference within;
   private final FrameRef frame;
   private final long start;
   private final long end;
-  
+
 
   @JsonCreator
   public WindowFrame(@JsonProperty("within") FieldReference within, 
@JsonProperty("ref") FrameRef frame, @JsonProperty("start") Long start, 
@JsonProperty("end") Long end) {
@@ -78,21 +78,21 @@ public class WindowFrame extends SingleInputOperator{
     public static class FrameRef{
     private final FieldReference segment;
     private final FieldReference position;
-    
+
     @JsonCreator
     public FrameRef(@JsonProperty("segment") FieldReference segment, 
@JsonProperty("position") FieldReference position) {
       super();
       this.segment = segment;
       this.position = position;
     }
-    
+
     public FieldReference getSegment() {
       return segment;
     }
     public FieldReference getPosition() {
       return position;
     }
-    
-    
+
+
   }
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/logical/data/visitors/AbstractLogicalVisitor.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/logical/data/visitors/AbstractLogicalVisitor.java
 
b/common/src/main/java/org/apache/drill/common/logical/data/visitors/AbstractLogicalVisitor.java
index 8758444..d128b10 100644
--- 
a/common/src/main/java/org/apache/drill/common/logical/data/visitors/AbstractLogicalVisitor.java
+++ 
b/common/src/main/java/org/apache/drill/common/logical/data/visitors/AbstractLogicalVisitor.java
@@ -93,7 +93,7 @@ public abstract class AbstractLogicalVisitor<T, X, E extends 
Throwable> implemen
     public T visitGroupingAggregate(GroupingAggregate groupBy, X value) throws 
E {
       return visitOp(groupBy, value);
     }
-    
+
     @Override
     public T visitSequence(Sequence sequence, X value) throws E {
         return visitOp(sequence, value);

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/types/Types.java
----------------------------------------------------------------------
diff --git a/common/src/main/java/org/apache/drill/common/types/Types.java 
b/common/src/main/java/org/apache/drill/common/types/Types.java
index 10be21e..2d90b67 100644
--- a/common/src/main/java/org/apache/drill/common/types/Types.java
+++ b/common/src/main/java/org/apache/drill/common/types/Types.java
@@ -17,14 +17,14 @@
  */
 package org.apache.drill.common.types;
 
+import static org.apache.drill.common.types.TypeProtos.DataMode.REPEATED;
+
 import org.apache.drill.common.types.TypeProtos.DataMode;
 import org.apache.drill.common.types.TypeProtos.MajorType;
 import org.apache.drill.common.types.TypeProtos.MinorType;
 
 import com.google.protobuf.TextFormat;
 
-import static org.apache.drill.common.types.TypeProtos.DataMode.REPEATED;
-
 public class Types {
   static final org.slf4j.Logger logger = 
org.slf4j.LoggerFactory.getLogger(Types.class);
 

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/util/AbstractDynamicBean.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/util/AbstractDynamicBean.java 
b/common/src/main/java/org/apache/drill/common/util/AbstractDynamicBean.java
index 0af8a90..07a3620 100644
--- a/common/src/main/java/org/apache/drill/common/util/AbstractDynamicBean.java
+++ b/common/src/main/java/org/apache/drill/common/util/AbstractDynamicBean.java
@@ -38,27 +38,27 @@ import com.fasterxml.jackson.databind.node.ObjectNode;
  */
 public abstract class AbstractDynamicBean {
   static final org.slf4j.Logger logger = 
org.slf4j.LoggerFactory.getLogger(AbstractDynamicBean.class);
-  
+
   private static volatile ObjectMapper MAPPER;
-  
+
   private ObjectNode objectNode = new ObjectNode(null);
 
-  @JsonAnySetter 
+  @JsonAnySetter
   public void _anySetter(String name, JsonNode value){
     objectNode.put(name, value);
   }
-  
+
   @JsonAnyGetter
   public Map<String,JsonNode> _anyGetter() {
     Map<String, JsonNode> unknowns = new HashMap<String, JsonNode>();
-    
+
     for(Iterator<Entry<String, JsonNode>> i = objectNode.fields(); 
i.hasNext(); ){
       Entry<String, JsonNode> e = i.next();
       unknowns.put(e.getKey(), e.getValue());
     }
     return unknowns;
   }
-  
+
   public <T> T getWith(Class<T> c){
     try {
       return getMapper().treeToValue(objectNode, c);
@@ -66,8 +66,8 @@ public abstract class AbstractDynamicBean {
       throw new LogicalPlanParsingException(String.format("Failure while 
trying to convert late bound json type to type of %s.", c.getCanonicalName()), 
e);
     }
   }
-  
-  
+
+
   private static synchronized ObjectMapper getMapper(){
     if(MAPPER == null){
       ObjectMapper mapper = new ObjectMapper();

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/util/ConstructorChecker.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/util/ConstructorChecker.java 
b/common/src/main/java/org/apache/drill/common/util/ConstructorChecker.java
index a68c5ba..7a6048b 100644
--- a/common/src/main/java/org/apache/drill/common/util/ConstructorChecker.java
+++ b/common/src/main/java/org/apache/drill/common/util/ConstructorChecker.java
@@ -21,11 +21,11 @@ import java.lang.reflect.Constructor;
 
 public class ConstructorChecker {
   static final org.slf4j.Logger logger = 
org.slf4j.LoggerFactory.getLogger(ConstructorChecker.class);
-  
+
   private final String requirementString;
   private final Class<?>[] classes;
- 
-  
+
+
   public ConstructorChecker(Class<?>... classes) {
     super();
     this.classes = classes;
@@ -35,7 +35,7 @@ public class ConstructorChecker {
       if(i != 0) sb.append(", ");
       sb.append(classes[i].getName());
     }
-     
+
     this.requirementString = sb.toString();
   }
 
@@ -45,10 +45,10 @@ public class ConstructorChecker {
     for(int i =0; i < classes.length; i++){
       if( !classes[i].isAssignableFrom(params[i])) return false;
     }
-    
+
     return true;
   }
-  
+
   public String getRequirementString(){
     return requirementString;
   }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/util/DrillStringUtils.java
----------------------------------------------------------------------
diff --git 
a/common/src/main/java/org/apache/drill/common/util/DrillStringUtils.java 
b/common/src/main/java/org/apache/drill/common/util/DrillStringUtils.java
index c23424e..422e28f 100644
--- a/common/src/main/java/org/apache/drill/common/util/DrillStringUtils.java
+++ b/common/src/main/java/org/apache/drill/common/util/DrillStringUtils.java
@@ -17,10 +17,10 @@
  */
 package org.apache.drill.common.util;
 
-import org.apache.commons.lang3.StringEscapeUtils;
-
 import io.netty.buffer.ByteBuf;
 
+import org.apache.commons.lang3.StringEscapeUtils;
+
 public class DrillStringUtils {
 
   /**

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/util/FileUtils.java
----------------------------------------------------------------------
diff --git a/common/src/main/java/org/apache/drill/common/util/FileUtils.java 
b/common/src/main/java/org/apache/drill/common/util/FileUtils.java
index 7072058..527162c 100644
--- a/common/src/main/java/org/apache/drill/common/util/FileUtils.java
+++ b/common/src/main/java/org/apache/drill/common/util/FileUtils.java
@@ -37,7 +37,7 @@ public class FileUtils {
     if (u == null) throw new FileNotFoundException(String.format("Unable to 
find file on path %s", fileName));
     return new File(u.getPath());
   }
-  
+
   public static String getResourceAsString(String fileName) throws IOException 
{
     return Files.toString(getResourceAsFile(fileName), Charsets.UTF_8);
   }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/common/src/main/java/org/apache/drill/common/util/Hook.java
----------------------------------------------------------------------
diff --git a/common/src/main/java/org/apache/drill/common/util/Hook.java 
b/common/src/main/java/org/apache/drill/common/util/Hook.java
index 41e468e..36ddb4e 100644
--- a/common/src/main/java/org/apache/drill/common/util/Hook.java
+++ b/common/src/main/java/org/apache/drill/common/util/Hook.java
@@ -17,11 +17,11 @@
  */
 package org.apache.drill.common.util;
 
-import com.google.common.base.Function;
-
 import java.util.List;
 import java.util.concurrent.CopyOnWriteArrayList;
 
+import com.google.common.base.Function;
+
 /**
  * Collection of hooks that can be set by observers and are executed at various
  * parts of the query preparation process.

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/DrillHBaseConstants.java
----------------------------------------------------------------------
diff --git 
a/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/DrillHBaseConstants.java
 
b/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/DrillHBaseConstants.java
index 03151af..0b2fb79 100644
--- 
a/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/DrillHBaseConstants.java
+++ 
b/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/DrillHBaseConstants.java
@@ -36,6 +36,6 @@ public interface DrillHBaseConstants {
   public static final MajorType COLUMN_TYPE = 
Types.optional(MinorType.VARBINARY);
 
   public static final String SYS_STORE_PROVIDER_HBASE_TABLE = 
"drill.exec.sys.store.provider.hbase.table";
-  
+
   public static final String SYS_STORE_PROVIDER_HBASE_CONFIG = 
"drill.exec.sys.store.provider.hbase.config";
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/HBaseGroupScan.java
----------------------------------------------------------------------
diff --git 
a/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/HBaseGroupScan.java
 
b/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/HBaseGroupScan.java
index d9a3cf9..d5dffdc 100644
--- 
a/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/HBaseGroupScan.java
+++ 
b/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/HBaseGroupScan.java
@@ -44,7 +44,6 @@ import org.apache.drill.exec.physical.base.ScanStats;
 import org.apache.drill.exec.physical.base.ScanStats.GroupScanProperty;
 import org.apache.drill.exec.proto.CoordinationProtos.DrillbitEndpoint;
 import org.apache.drill.exec.store.AbstractRecordReader;
-import org.apache.drill.exec.store.RecordReader;
 import org.apache.drill.exec.store.StoragePluginRegistry;
 import org.apache.drill.exec.store.hbase.HBaseSubScan.HBaseSubScanSpec;
 import org.apache.hadoop.conf.Configuration;
@@ -406,6 +405,7 @@ public class HBaseGroupScan extends AbstractGroupScan 
implements DrillHBaseConst
     return hbaseScanSpec;
   }
 
+  @Override
   @JsonIgnore
   public boolean canPushdownProjects(List<SchemaPath> columns) {
     return true;

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/HBaseRecordReader.java
----------------------------------------------------------------------
diff --git 
a/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/HBaseRecordReader.java
 
b/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/HBaseRecordReader.java
index cbd5269..a5b6c94 100644
--- 
a/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/HBaseRecordReader.java
+++ 
b/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/HBaseRecordReader.java
@@ -25,7 +25,6 @@ import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
 
-import com.google.common.base.Preconditions;
 import org.apache.drill.common.exceptions.DrillRuntimeException;
 import org.apache.drill.common.exceptions.ExecutionSetupException;
 import org.apache.drill.common.expression.PathSegment;
@@ -38,7 +37,6 @@ import org.apache.drill.exec.ops.OperatorContext;
 import org.apache.drill.exec.physical.impl.OutputMutator;
 import org.apache.drill.exec.record.MaterializedField;
 import org.apache.drill.exec.store.AbstractRecordReader;
-import org.apache.drill.exec.store.RecordReader;
 import org.apache.drill.exec.vector.NullableVarBinaryVector;
 import org.apache.drill.exec.vector.ValueVector;
 import org.apache.drill.exec.vector.VarBinaryVector;
@@ -52,6 +50,7 @@ import org.apache.hadoop.hbase.client.ResultScanner;
 import org.apache.hadoop.hbase.client.Scan;
 import org.apache.hadoop.hbase.filter.FirstKeyOnlyFilter;
 
+import com.google.common.base.Preconditions;
 import com.google.common.base.Stopwatch;
 import com.google.common.collect.Sets;
 

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/HBaseStoragePlugin.java
----------------------------------------------------------------------
diff --git 
a/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/HBaseStoragePlugin.java
 
b/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/HBaseStoragePlugin.java
index 7bc7c4b..c10b0ab 100644
--- 
a/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/HBaseStoragePlugin.java
+++ 
b/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/HBaseStoragePlugin.java
@@ -75,6 +75,7 @@ public class HBaseStoragePlugin extends AbstractStoragePlugin 
{
     return engineConfig;
   }
 
+  @Override
   public Set<StoragePluginOptimizerRule> getOptimizerRules() {
     return ImmutableSet.of(HBasePushFilterIntoScan.INSTANCE);
   }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/TableStatsCalculator.java
----------------------------------------------------------------------
diff --git 
a/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/TableStatsCalculator.java
 
b/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/TableStatsCalculator.java
index 0ce9938..125483e 100644
--- 
a/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/TableStatsCalculator.java
+++ 
b/contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/TableStatsCalculator.java
@@ -63,8 +63,8 @@ public class TableStatsCalculator {
    * Computes size of each region for table.
    *
    * @param table
-   * @param hbaseScanSpec 
-   * @param drillConfig 
+   * @param hbaseScanSpec
+   * @param drillConfig
    * @throws IOException
    */
   public TableStatsCalculator(HTable table, HBaseScanSpec hbaseScanSpec, 
DrillConfig config) throws IOException {

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/contrib/storage-hbase/src/test/java/org/apache/drill/hbase/BaseHBaseTest.java
----------------------------------------------------------------------
diff --git 
a/contrib/storage-hbase/src/test/java/org/apache/drill/hbase/BaseHBaseTest.java 
b/contrib/storage-hbase/src/test/java/org/apache/drill/hbase/BaseHBaseTest.java
index 36cf15b..086900a 100644
--- 
a/contrib/storage-hbase/src/test/java/org/apache/drill/hbase/BaseHBaseTest.java
+++ 
b/contrib/storage-hbase/src/test/java/org/apache/drill/hbase/BaseHBaseTest.java
@@ -23,11 +23,9 @@ import java.util.List;
 import org.apache.drill.BaseTestQuery;
 import org.apache.drill.common.util.FileUtils;
 import org.apache.drill.exec.exception.SchemaChangeException;
-import org.apache.drill.exec.record.RecordBatchLoader;
 import org.apache.drill.exec.rpc.user.QueryResultBatch;
 import org.apache.drill.exec.store.hbase.HBaseStoragePlugin;
 import org.apache.drill.exec.store.hbase.HBaseStoragePluginConfig;
-import org.apache.drill.exec.util.VectorUtil;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.HBaseConfiguration;
 import org.junit.AfterClass;

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/39990292/contrib/storage-hbase/src/test/java/org/apache/drill/hbase/TestTableGenerator.java
----------------------------------------------------------------------
diff --git 
a/contrib/storage-hbase/src/test/java/org/apache/drill/hbase/TestTableGenerator.java
 
b/contrib/storage-hbase/src/test/java/org/apache/drill/hbase/TestTableGenerator.java
index 99862e0..ccf5ad5 100644
--- 
a/contrib/storage-hbase/src/test/java/org/apache/drill/hbase/TestTableGenerator.java
+++ 
b/contrib/storage-hbase/src/test/java/org/apache/drill/hbase/TestTableGenerator.java
@@ -148,7 +148,7 @@ public class TestTableGenerator {
 
     table.flushCommits();
     table.close();
-    
+
     admin.flush(tableName);
   }
 

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