public static Expression Replace(Expression proj, AliasGenerator aliasGenerator)
{
AliasProjectionReplacer apr = new AliasProjectionReplacer(
root: proj as ProjectionExpression,
aliasGenerator: aliasGenerator
);
return(apr.Visit(proj));
}
internal static Expression Optimize(Expression binded, QueryBinder binder, AliasGenerator aliasGenerator, HeavyProfiler.Tracer?log)
{
var isPostgres = Schema.Current.Settings.IsPostgres;
log.Switch("Aggregate");
Expression rewriten = AggregateRewriter.Rewrite(binded);
log.Switch("DupHistory");
Expression dupHistory = DuplicateHistory.Rewrite(rewriten, aliasGenerator);
log.Switch("EntityCompleter");
Expression completed = EntityCompleter.Complete(dupHistory, binder);
log.Switch("AliasReplacer");
Expression replaced = AliasProjectionReplacer.Replace(completed, aliasGenerator);
log.Switch("OrderBy");
Expression orderRewrited = OrderByRewriter.Rewrite(replaced);
log.Switch("OrderBy");
Expression lazyCastRemoved = SqlCastLazyRemover.Remove(orderRewrited);
log.Switch("Rebinder");
Expression rebinded = QueryRebinder.Rebind(lazyCastRemoved);
log.Switch("UnusedColumn");
Expression columnCleaned = UnusedColumnRemover.Remove(rebinded);
log.Switch("Redundant");
Expression subqueryCleaned = RedundantSubqueryRemover.Remove(columnCleaned);
log.Switch("Condition");
Expression rewriteConditions = isPostgres ? ConditionsRewriterPostgres.Rewrite(subqueryCleaned) : ConditionsRewriter.Rewrite(subqueryCleaned);
log.Switch("Scalar");
Expression scalar = ScalarSubqueryRewriter.Rewrite(rewriteConditions);
return(scalar);
}
