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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);
}
protected internal override Expression VisitChildProjection(ChildProjectionExpression child)
{
Expression key = this.Visit(child.OuterKey);
ProjectionExpression proj = (ProjectionExpression)UnusedColumnRemover.Remove(child.Projection);
if (proj != child.Projection || key != child.OuterKey)
{
return(new ChildProjectionExpression(proj, key, child.IsLazyMList, child.Type, child.Token));
}
return(child);
}
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);
}
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("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 = isPostgres ? ConditionsRewriterPostgres.Rewrite(subqueryCleaned) : ConditionsRewriter.Rewrite(subqueryCleaned);
log.Switch("Scalar");
Expression scalar = ScalarSubqueryRewriter.Rewrite(rewriteConditions);
return(scalar);
}