diff --git a/core/src/main/java/com/orientechnologies/orient/core/record/impl/OEdgeDelegate.java b/core/src/main/java/com/orientechnologies/orient/core/record/impl/OEdgeDelegate.java
index 0de621f7f19..832c41d162e 100755
--- a/core/src/main/java/com/orientechnologies/orient/core/record/impl/OEdgeDelegate.java
+++ b/core/src/main/java/com/orientechnologies/orient/core/record/impl/OEdgeDelegate.java
@@ -503,8 +503,8 @@ public String toJSON() {
     if (element != null) {
       return element.toJSON();
     } else {
-      return "{'out':'" + vOut.getIdentity() + "', 'in':'" + vIn.getIdentity() + "', '@class':'" + OStringSerializerHelper
-          .encode(lightweightEdgeType.getName()) + "'}";
+      return "{\"out\":\"" + vOut.getIdentity() + "\", \"in\":\"" + vIn.getIdentity() + "\", \"@class\":\"" + OStringSerializerHelper
+          .encode(lightweightEdgeType.getName()) + "\"}";
     }
   }
 
@@ -513,8 +513,8 @@ public String toJSON(String iFormat) {
     if (element != null) {
       return element.toJSON(iFormat);
     } else {
-      return "{'out':'" + vOut.getIdentity() + "', 'in':'" + vIn.getIdentity() + "', '@class':'" + OStringSerializerHelper
-          .encode(lightweightEdgeType.getName()) + "'}";
+      return "{\"out\":\"" + vOut.getIdentity() + "\", \"in\":\"" + vIn.getIdentity() + "\", \"@class\":\"" + OStringSerializerHelper
+          .encode(lightweightEdgeType.getName()) + "\"}";
     }
   }
 
diff --git a/core/src/main/java/com/orientechnologies/orient/core/sql/executor/OSelectExecutionPlanner.java b/core/src/main/java/com/orientechnologies/orient/core/sql/executor/OSelectExecutionPlanner.java
index 3851fe241fe..49c3da30971 100755
--- a/core/src/main/java/com/orientechnologies/orient/core/sql/executor/OSelectExecutionPlanner.java
+++ b/core/src/main/java/com/orientechnologies/orient/core/sql/executor/OSelectExecutionPlanner.java
@@ -16,61 +16,9 @@
 import com.orientechnologies.orient.core.metadata.schema.OProperty;
 import com.orientechnologies.orient.core.metadata.schema.OType;
 import com.orientechnologies.orient.core.sql.OCommandExecutorSQLAbstract;
-import com.orientechnologies.orient.core.sql.parser.AggregateProjectionSplit;
-import com.orientechnologies.orient.core.sql.parser.OAndBlock;
-import com.orientechnologies.orient.core.sql.parser.OBaseExpression;
-import com.orientechnologies.orient.core.sql.parser.OBinaryCompareOperator;
-import com.orientechnologies.orient.core.sql.parser.OBinaryCondition;
-import com.orientechnologies.orient.core.sql.parser.OBooleanExpression;
-import com.orientechnologies.orient.core.sql.parser.OCluster;
-import com.orientechnologies.orient.core.sql.parser.OContainsAnyCondition;
-import com.orientechnologies.orient.core.sql.parser.OContainsKeyOperator;
-import com.orientechnologies.orient.core.sql.parser.OContainsValueCondition;
-import com.orientechnologies.orient.core.sql.parser.OContainsValueOperator;
-import com.orientechnologies.orient.core.sql.parser.OEqualsCompareOperator;
-import com.orientechnologies.orient.core.sql.parser.OExecutionPlanCache;
-import com.orientechnologies.orient.core.sql.parser.OExpression;
-import com.orientechnologies.orient.core.sql.parser.OFromClause;
-import com.orientechnologies.orient.core.sql.parser.OFromItem;
-import com.orientechnologies.orient.core.sql.parser.OFunctionCall;
-import com.orientechnologies.orient.core.sql.parser.OGeOperator;
-import com.orientechnologies.orient.core.sql.parser.OGroupBy;
-import com.orientechnologies.orient.core.sql.parser.OGtOperator;
-import com.orientechnologies.orient.core.sql.parser.OIdentifier;
-import com.orientechnologies.orient.core.sql.parser.OInCondition;
-import com.orientechnologies.orient.core.sql.parser.OIndexIdentifier;
-import com.orientechnologies.orient.core.sql.parser.OInputParameter;
-import com.orientechnologies.orient.core.sql.parser.OInteger;
-import com.orientechnologies.orient.core.sql.parser.OLeOperator;
-import com.orientechnologies.orient.core.sql.parser.OLetClause;
-import com.orientechnologies.orient.core.sql.parser.OLetItem;
-import com.orientechnologies.orient.core.sql.parser.OLtOperator;
-import com.orientechnologies.orient.core.sql.parser.OMetadataIdentifier;
-import com.orientechnologies.orient.core.sql.parser.OOrBlock;
-import com.orientechnologies.orient.core.sql.parser.OOrderBy;
-import com.orientechnologies.orient.core.sql.parser.OOrderByItem;
-import com.orientechnologies.orient.core.sql.parser.OProjection;
-import com.orientechnologies.orient.core.sql.parser.OProjectionItem;
-import com.orientechnologies.orient.core.sql.parser.ORecordAttribute;
-import com.orientechnologies.orient.core.sql.parser.ORid;
-import com.orientechnologies.orient.core.sql.parser.OSelectStatement;
-import com.orientechnologies.orient.core.sql.parser.OStatement;
-import com.orientechnologies.orient.core.sql.parser.OWhereClause;
-import com.orientechnologies.orient.core.sql.parser.SubQueryCollector;
-
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.Comparator;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.LinkedHashMap;
-import java.util.List;
-import java.util.Locale;
-import java.util.Map;
-import java.util.Objects;
-import java.util.Set;
+import com.orientechnologies.orient.core.sql.parser.*;
+
+import java.util.*;
 import java.util.stream.Collectors;
 
 /**
@@ -811,6 +759,7 @@ private static List<OProjectionItem> calculateAdditionalOrderByProjections(Set<S
           OIdentifier newAlias = new OIdentifier("_$$$ORDER_BY_ALIAS$$$_" + (nextAliasCount++));
           newProj.setAlias(newAlias);
           item.setAlias(newAlias.getStringValue());
+          item.setModifier(null);
           result.add(newProj);
         }
       }
diff --git a/core/src/main/java/com/orientechnologies/orient/core/sql/parser/OOrderBy.java b/core/src/main/java/com/orientechnologies/orient/core/sql/parser/OOrderBy.java
index 4249396e50a..8e39f9179ed 100644
--- a/core/src/main/java/com/orientechnologies/orient/core/sql/parser/OOrderBy.java
+++ b/core/src/main/java/com/orientechnologies/orient/core/sql/parser/OOrderBy.java
@@ -57,7 +57,7 @@ public int compare(OResult a, OResult b, OCommandContext ctx) {
     for (OOrderByItem item : items) {
       int result = item.compare(a, b, ctx);
       if (result != 0) {
-        return result;
+        return result > 0 ? 1 : -1;
       }
     }
     return 0;
@@ -69,7 +69,8 @@ public OOrderBy copy() {
     return result;
   }
 
-  @Override public boolean equals(Object o) {
+  @Override
+  public boolean equals(Object o) {
     if (this == o)
       return true;
     if (o == null || getClass() != o.getClass())
@@ -83,22 +84,23 @@ public OOrderBy copy() {
     return true;
   }
 
-  @Override public int hashCode() {
+  @Override
+  public int hashCode() {
     return items != null ? items.hashCode() : 0;
   }
 
   public void extractSubQueries(SubQueryCollector collector) {
-    if(items!=null){
-      for(OOrderByItem item:items){
+    if (items != null) {
+      for (OOrderByItem item : items) {
         item.extractSubQueries(collector);
       }
     }
   }
 
   public boolean refersToParent() {
-    if(items!=null){
-      for(OOrderByItem item:items){
-        if(item.refersToParent()){
+    if (items != null) {
+      for (OOrderByItem item : items) {
+        if (item.refersToParent()) {
           return true;
         }
       }
diff --git a/core/src/main/java/com/orientechnologies/orient/core/sql/parser/OOrderByItem.java b/core/src/main/java/com/orientechnologies/orient/core/sql/parser/OOrderByItem.java
index 1b5ea5e3499..b81e298ffc0 100755
--- a/core/src/main/java/com/orientechnologies/orient/core/sql/parser/OOrderByItem.java
+++ b/core/src/main/java/com/orientechnologies/orient/core/sql/parser/OOrderByItem.java
@@ -93,11 +93,9 @@ public int compare(OResult a, OResult b, OCommandContext ctx) {
       } else {
         result = -1;
       }
-    }
-    if (bVal == null) {
+    } else if (bVal == null) {
       result = 1;
-    }
-    if (aVal instanceof Comparable && bVal instanceof Comparable) {
+    } else if (aVal instanceof Comparable && bVal instanceof Comparable) {
       try {
         result = ((Comparable) aVal).compareTo(bVal);
       } catch (Exception e) {
@@ -141,6 +139,10 @@ public OModifier getModifier() {
     return modifier;
   }
 
+  public void setModifier(OModifier modifier) {
+    this.modifier = modifier;
+  }
+
   public OResult serialize() {
     OResultInternal result = new OResultInternal();
     result.setProperty("alias", alias);
diff --git a/server/src/main/java/com/orientechnologies/orient/server/network/protocol/http/OHttpGraphResponse.java b/server/src/main/java/com/orientechnologies/orient/server/network/protocol/http/OHttpGraphResponse.java
index 79eef13aaef..636a5b1c58d 100755
--- a/server/src/main/java/com/orientechnologies/orient/server/network/protocol/http/OHttpGraphResponse.java
+++ b/server/src/main/java/com/orientechnologies/orient/server/network/protocol/http/OHttpGraphResponse.java
@@ -128,9 +128,9 @@ public void writeRecords(final Object iRecords, final String iFetchPlan, String
       json.beginCollection("edges");
       Set<ORID> edgeRids = new HashSet<ORID>();
       for (OVertex vertex : vertices) {
-        for (OEdge e : vertex.getEdges(ODirection.BOTH)) {
+        for (OEdge e : vertex.getEdges(ODirection.OUT)) {
           OEdge edge = (OEdge) e;
-          if (edgeRids.contains(e.getIdentity())) {
+          if (edgeRids.contains(e.getIdentity()) && e.getIdentity() != null /* only for non-lighweight */) {
             continue;
           }
           if (!vertices.contains(edge.getVertex(ODirection.OUT)) || !vertices.contains(edge.getVertex(ODirection.IN)))