// Convert the constants available as strings to the corresponding objects
children.add(createConstDesc(skewedValue, keyCol));
ExprNodeGenericFuncDesc expr = null;
// Create the equality condition
expr = ExprNodeGenericFuncDesc.newInstance(new GenericUDFOPEqual(), children);
if (currExprNodeDesc == null) {
currExprNodeDesc = expr;
} else {
// If there are previous nodes, then AND the current node with the previous one
List<ExprNodeDesc> childrenAND = new ArrayList<ExprNodeDesc>();