}
public void validate(PigContext pigContext, String scope, boolean skipInputOutputValidation)
throws FrontendException {
new DanglingNestedNodeRemover(this).visit();
new ColumnAliasConversionVisitor(this).visit();
new SchemaAliasVisitor(this).visit();
new ScalarVisitor(this, pigContext, scope).visit();
// ImplicitSplitInsertVisitor has to be called before