internal static Expression Optimize(Expression binded, QueryBinder binder, AliasGenerator aliasGenerator, HeavyProfiler.Tracer log)
{
log.Switch("Aggregate");
Expression rewrited = AggregateRewriter.Rewrite(binded);
log.Switch("EntityCompleter");
Expression completed = EntityCompleter.Complete(rewrited, binder);
log.Switch("AliasReplacer");
Expression replaced = AliasProjectionReplacer.Replace(completed, aliasGenerator);
log.Switch("OrderBy");
Expression orderRewrited = OrderByRewriter.Rewrite(replaced);
log.Switch("Rebinder");
Expression rebinded = QueryRebinder.Rebind(orderRewrited);
log.Switch("UnusedColumn");
Expression columnCleaned = UnusedColumnRemover.Remove(rebinded);
log.Switch("Redundant");
Expression subqueryCleaned = RedundantSubqueryRemover.Remove(columnCleaned);
log.Switch("Condition");
Expression rewriteConditions = ConditionsRewriter.Rewrite(subqueryCleaned);
log.Switch("Scalar");
Expression scalar = ScalarSubqueryRewriter.Rewrite(rewriteConditions);
return(scalar);
}
public static Expression Remove(Expression expression)
{
var removed = new RedundantSubqueryRemover().Visit(expression);
var merged = SubqueryMerger.Merge(removed);
var simplified = JoinSimplifier.Simplify(merged);
return(simplified);
}
static internal ProjectionExpression Flatten(ProjectionExpression proj, AliasGenerator aliasGenerator)
{
var result = (ProjectionExpression) new ChildProjectionFlattener(aliasGenerator).Visit(proj);
if (result == proj)
{
return(result);
}
Expression columnCleaned = UnusedColumnRemover.Remove(result);
Expression subqueryCleaned = RedundantSubqueryRemover.Remove(columnCleaned);
return((ProjectionExpression)subqueryCleaned);
}
public static Expression Remove(Expression expression)
{
expression = new RedundantSubqueryRemover().Visit(expression);
expression = SubqueryMerger.Merge(expression);
return(expression);
}
public static Expression Remove(Expression expression)
{
expression = new RedundantSubqueryRemover().Visit(expression);
expression = SubqueryMerger.Merge(expression);
return expression;
}