/**
* transform an expression that may involve aggregates into one that just uses the variable for
* the aggregate
*/
public static Expr replaceAggregateByVariable(Expr expr) {
return ExprTransformer.transform(replaceAgg, expr);
}
/**
* Attempt to fold any sub-expressions of the Expr. Return an expression that is euqivalent to the
* argument but maybe simpler.
*
* @param expr
* @return Expression
*/
public static Expr foldConstants(Expr expr) {
return ExprTransformer.transform(new ExprTransformConstantFold(), expr);
}
