public static List <Expression> Find(Expression expression)
{
var finder = new SqlAggregateSubqueryFinder();
finder.Visit(expression);
return(finder.aggregatesFound);
}
private SqlAggregateSubqueryRewriter(Expression expr)
{
this.aggregateSubqueryInstances = new Dictionary <SqlAggregateSubqueryExpression, Expression>();
this.aggregateSubqueriesBySelectAlias = SqlAggregateSubqueryFinder.Find(expr).OfType <SqlAggregateSubqueryExpression>().ToLookup(a => a.GroupByAlias);
}