checkNotNull(ctx.derivedColumn());
//TODO
//zawodzi dla "SELECT p.* FROM p"
} else {
checkNotNull(ctx.derivedColumn());
ValueExpressionContext valueExpression =
ctx.derivedColumn().valueExpression();
// TODO implement renaming the column, which will be needed to support 'from subquery'
String columnAlias = null;
if (ctx.derivedColumn().asClause() != null) {
columnAlias = ctx.derivedColumn().asClause().columnName().getText();