diff --git a/component/src/main/java/org/ballerinalang/data/cassandra/CassandraDataIterator.java b/component/src/main/java/org/ballerinalang/data/cassandra/CassandraDataIterator.java
index 9210e8c..cbdfe4a 100644
--- a/component/src/main/java/org/ballerinalang/data/cassandra/CassandraDataIterator.java
+++ b/component/src/main/java/org/ballerinalang/data/cassandra/CassandraDataIterator.java
@@ -34,7 +34,6 @@
 import java.util.Base64;
 import java.util.Iterator;
 import java.util.List;
-import java.util.Map;
 
 /**
  * This iterator wraps a cassandra data row.
@@ -72,37 +71,42 @@ public void close(boolean b) {
     }
 
     @Override
-    public String getString(String s) {
+    public String getString(int columnIndex) {
         this.checkCurrentRow();
-        return this.current.getString(s);
+        return this.current.getString(columnIndex - 1);
     }
 
     @Override
-    public long getInt(String s) {
+    public long getInt(int columnIndex) {
         this.checkCurrentRow();
-        return this.current.getInt(s);
+        return this.current.getInt(columnIndex - 1);
     }
 
     @Override
-    public double getFloat(String s) {
+    public double getFloat(int columnIndex) {
         this.checkCurrentRow();
-        return this.current.getFloat(s);
+        return this.current.getFloat(columnIndex - 1);
     }
 
     @Override
-    public boolean getBoolean(String s) {
+    public boolean getBoolean(int columnIndex) {
         this.checkCurrentRow();
-        return this.current.getBool(s);
+        return this.current.getBool(columnIndex - 1);
     }
 
     @Override
-    public String getBlob(String s) {
+    public String getBlob(int columnIndex) {
         this.checkCurrentRow();
-        return getString(this.current.getBytes(s));
+        return getString(this.current.getBytes(columnIndex - 1));
     }
 
     @Override
-    public Map<String, Object> getArray(String s) {
+    public Object[] getStruct(int i) {
+        return new Object[0];
+    }
+
+    @Override
+    public Object[] getArray(int columnIndex) {
         return null;
     }
 
@@ -113,24 +117,26 @@ public BStruct generateNext() {
         int doubleRegIndex = -1;
         int stringRegIndex = -1;
         int booleanRegIndex = -1;
+        int index = 0;
         for (ColumnDefinition columnDef : columnDefs) {
             String columnName = columnDef.getName();
             TypeKind type = columnDef.getType();
+            ++index;
             switch (type) {
             case STRING:
-                String sValue = getString(columnName);
+                String sValue = getString(index);
                 bStruct.setStringField(++stringRegIndex, sValue);
                 break;
             case INT:
-                long lValue = getInt(columnName);
+                long lValue = getInt(index);
                 bStruct.setIntField(++longRegIndex, lValue);
                 break;
             case FLOAT:
-                double fValue = getFloat(columnName);
+                double fValue = getFloat(index);
                 bStruct.setFloatField(++doubleRegIndex, fValue);
                 break;
             case BOOLEAN:
-                boolean boolValue = getBoolean(columnName);
+                boolean boolValue = getBoolean(index);
                 bStruct.setBooleanField(++booleanRegIndex, boolValue ? 1 : 0);
                 break;
             default:
@@ -145,6 +151,11 @@ public List<ColumnDefinition> getColumnDefinitions() {
         return this.columnDefs;
     }
 
+    @Override
+    public BStructType getStructType() {
+        return this.bStructType;
+    }
+
     private void generateStructType() {
         BType[] structTypes = new BType[columnDefs.size()];
         BStructType.StructField[] structFields = new BStructType.StructField[columnDefs.size()];
diff --git a/pom.xml b/pom.xml
index 03df1d6..205b048 100644
--- a/pom.xml
+++ b/pom.xml
@@ -178,7 +178,7 @@
 
     <properties>
         <project.scm.id>my-scm-server</project.scm.id>
-        <ballerina.version>0.95.3</ballerina.version>
+        <ballerina.version>0.95.6</ballerina.version>
         <cassandra.version>3.1.3</cassandra.version>
         <com.google.guava.version>19.0</com.google.guava.version>
         <io.dropwizard.metrics.version>3.1.2</io.dropwizard.metrics.version>