void setColDefaultExpression(int colIndex, Expression def) {

        if (def == null) {
            table.checkColumnInFKConstraint(colIndex, Constraint.SET_DEFAULT);
        }

        table.setDefaultExpression(colIndex, def);
    }
void setColDefaultExpression ( int colIndex , Expression def ) { if ( def == null ) { table . checkColumnInFKConstraint ( colIndex , Constraint . SET_DEFAULT ) ; } table . setDefaultExpression ( colIndex , def ) ; }
performs the work for changing the default value of a column

@param colIndex int
@param def Expression