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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2006, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
// $Id:SetFunction.scala 6853 2006-03-20 16:58:47 +0100 (Mon, 20 Mar 2006) dubochet $
package scala.dbc.statement.expression;
abstract class SetFunction {
/** A SQL-99 compliant string representation of the set quantifier. */
def sqlString: String;
}
object SetFunction {
abstract class Asterisk extends SetFunction {
def sqlString = "(*)";
}
abstract class General extends SetFunction {
def setQuantifier: Option[SetQuantifier];
def valueExpression: Expression;
def sqlString = (
"(" +
(setQuantifier match {
case None => ""
case Some(sq) => sq.sqlString + " "
}) +
valueExpression.sqlString + ")"
);
}
abstract class Binary extends SetFunction {
def sqlString = error("Binary set function is not supported yet.");
}
}
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