public override Expression Translate(Expression expression) { expression = OrderByRewriter.Rewrite(expression); expression = base.Translate(expression); expression = UnusedColumnRemover.Remove(expression); return(expression); }
public static Expression Optimize(Expression expression, Type typeForEnums, bool simplerPartialVal = true) { expression = ObjectOperandComparisonExpander.Expand(expression); expression = EnumTypeNormalizer.Normalize(expression, typeForEnums); expression = GroupByCollator.Collate(expression); expression = AggregateSubqueryRewriter.Rewrite(expression); expression = UnusedColumnRemover.Remove(expression); expression = RedundantColumnRemover.Remove(expression); expression = RedundantSubqueryRemover.Remove(expression); expression = FunctionCoalescer.Coalesce(expression); expression = ExistsSubqueryOptimizer.Optimize(expression); expression = RedundantBinaryExpressionsRemover.Remove(expression); if (simplerPartialVal) { expression = Evaluator.PartialEval(expression, c => c.NodeType != (ExpressionType)SqlExpressionType.ConstantPlaceholder && Evaluator.CanBeEvaluatedLocally(c)); } else { expression = Evaluator.PartialEval(expression); } expression = RedundantFunctionCallRemover.Remove(expression); expression = ConditionalEliminator.Eliminate(expression); expression = SqlExpressionCollectionOperationsExpander.Expand(expression); expression = SumAggregatesDefaultValueCoalescer.Coalesce(expression); expression = OrderByRewriter.Rewrite(expression); return(expression); }
public override System.Linq.Expressions.Expression Translate(Expression expression) { expression = OrderByRewriter.Rewrite(expression); expression = UnusedColumnRemover.Remove(expression); expression = RedundantColumnRemover.Remove(expression); expression = RedundantSubqueryRemover.Remove(expression); var rewritten = CrossApplyRewriter.Rewrite(expression); rewritten = CrossJoinRewriter.Rewrite(rewritten); if (rewritten != expression) { expression = rewritten; expression = UnusedColumnRemover.Remove(expression); expression = RedundantSubqueryRemover.Remove(expression); expression = RedundantJoinRemover.Remove(expression); expression = RedundantColumnRemover.Remove(expression); } expression = SkipToRowNumberRewriter.Rewrite(expression); expression = OrderByRewriter.Rewrite(expression); return(expression); }
public override Expression Translate(Expression expression) { expression = OrderByRewriter.Rewrite(expression); expression = base.Translate(expression); expression = SkipToRowNumberRewriter.Rewrite(expression); expression = OrderByRewriter.Rewrite(expression); return(expression); }
public override Expression Translate(Expression expression) { // fix up any order-by's expression = OrderByRewriter.Rewrite(Language, expression); expression = base.Translate(expression); expression = UnusedColumnRemover.Remove(expression); //expression = DistinctOrderByRewriter.Rewrite(expression); return(expression); }
public override Expression Translate(Expression expression) { // fix up any order-by's expression = OrderByRewriter.Rewrite(Language, expression); expression = base.Translate(expression); expression = SkipToNestedOrderByRewriter.Rewrite(Language, expression); expression = OrderByRewriter.Rewrite(Language, expression); expression = UnusedColumnRemover.Remove(expression); expression = RedundantSubqueryRemover.Remove(expression); expression = ScalarSubqueryRewriter.Rewrite(Language, expression); return(expression); }
public override Expression Translate(Expression expression) { bool hasRowNumberExpression; // fix up any order-by's expression = OrderByRewriter.Rewrite(this.Language, expression); expression = XmlToCursorExpressionRewriter.Rewrite(expression); // remove redundant layers again before cross apply rewrite expression = UnusedColumnRemover.Remove(expression); expression = RedundantColumnRemover.Remove(expression); expression = RedundantSubqueryRemover.Remove(expression); expression = OneBasedIndexRewriter.Rewrite(expression); // convert cross-apply and outer-apply joins into inner & left-outer-joins if possible var rewritten = CrossApplyRewriter.Rewrite(this.language, expression); // convert cross joins into inner joins rewritten = CrossJoinRewriter.Rewrite(rewritten); if (rewritten != expression) { expression = rewritten; // do final reduction expression = UnusedColumnRemover.Remove(expression); expression = RedundantSubqueryRemover.Remove(expression); expression = RedundantJoinRemover.Remove(expression); expression = RedundantColumnRemover.Remove(expression); } // convert skip/take info into RowNumber pattern expression = SkipToRowNumberRewriter.Rewrite(expression, out hasRowNumberExpression); expression = SkipToNestedOrderByRewriter.Rewrite(this.Language, expression); expression = UnusedColumnRemover.Remove(expression); expression = WhereCountComparisonRewriter.Rewrite(expression); if (!hasRowNumberExpression) { expression = OrderByRewriter.Rewrite(this.Language, expression); expression = RedundantSubqueryRemover.Remove(expression); } expression = VfpCrossJoinIsolator.Isolate(expression); expression = ConditionalImmediateIfNullRemover.Remove(expression); expression = XmlToCursorJoinRewriter.Rewrite(expression); return(expression); }
public override Expression Translate(Expression expression) { // fix up any order-by's expression = OrderByRewriter.Rewrite(this.Language, expression); expression = base.Translate(expression); //expression = SkipToNestedOrderByRewriter.Rewrite(expression); expression = UnusedColumnRemover.Remove(expression); return(expression); }
public override Expression Translate(Expression expression) { // fix up any order-by's expression = OrderByRewriter.Rewrite(expression); expression = base.Translate(expression); expression = CrossJoinIsolator.Isolate(expression); expression = ThreeTopPagerRewriter.Rewrite(expression); expression = OrderByRewriter.Rewrite(expression); expression = UnusedColumnRemover.Remove(expression); expression = RedundantColumnRemover.Remove(expression); return(expression); }
public override Expression Translate(Expression expression) { // fix up any order-by's expression = OrderByRewriter.Rewrite(this.Language, expression); expression = base.Translate(expression); // convert skip/take info into RowNumber pattern expression = SkipToRowNumberRewriter.Rewrite(this.Language, expression); // fix up any order-by's we may have changed expression = OrderByRewriter.Rewrite(this.Language, expression); return(expression); }
/// <summary> /// /// </summary> /// <param name="expression"></param> /// <returns></returns> public override Expression Translate(Expression expression) { // fix up any order-by's expression = OrderByRewriter.Rewrite(expression); expression = base.Translate(expression); // convert skip/take info into RowNumber pattern expression = SkipRewriter.Rewrite(expression, Nequeo.Data.DataType.ConnectionContext.ConnectionDataType.OracleDataType); // fix up any order-by's we may have changed expression = OrderByRewriter.Rewrite(expression); return(expression); }
public override Expression Translate(Expression expression) { // fix up any order-by's expression = OrderByRewriter.Rewrite(expression); expression = base.Translate(expression); expression = ThreeTopPagerRewriter.Rewrite(expression); expression = OrderByRewriter.Rewrite(expression); expression = UnusedColumnRemover.Remove(expression); expression = RedundantSubqueryRemover.Remove(expression); expression = ScalarSubqueryRewriter.Rewrite(expression); return(expression); }
internal Expression Translate(Expression expression) { if (expression is ProjectionExpression projection) { return(projection); } expression = Evaluator.PartialEval(expression, CanBeEvaluatedLocally); expression = QueryBinder.Bind(this, expression); expression = ConstantEscaper.EscapeConstants(expression); expression = OrderByRewriter.Rewrite(expression); expression = RedundantSubqueryRemover.Remove(expression); expression = UnusedColumnRemover.Remove(expression); expression = AggregateSimplifier.Simplify(expression); return(expression); }
private Expression Translate(Expression expression) { var rootQueryable = new RootQueryableFinder().Find(expression); var elementType = ((IQueryable)((ConstantExpression)rootQueryable).Value).ElementType; expression = PartialEvaluator.Evaluate(expression, CanBeEvaluatedLocally); expression = new FieldBinder().Bind(expression, elementType); expression = new QueryBinder(this, expression).Bind(expression); expression = new AggregateRewriter().Rewrite(expression); expression = new RedundantFieldRemover().Remove(expression); expression = new RedundantSubqueryRemover().Remove(expression); expression = new OrderByRewriter().Rewrite(expression); expression = new RedundantFieldRemover().Remove(expression); expression = new RedundantSubqueryRemover().Remove(expression); return(expression); }
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); }
public override Expression Translate(Expression expression) { // fix up any order-by's expression = OrderByRewriter.Rewrite(expression); expression = base.Translate(expression); // convert skip/take info into RowNumber pattern if (isPaged(expression)) { //we have some clean up here //paging embeds a SELECT in the FROM expression //this needs to be reset to the table name //and Skip/Take need to be reset var projection = expression as ProjectionExpression; //pull the select SelectExpression outer = projection.Source; //take out the nested FROM var inner = outer.From as SelectExpression; //and stick it on the outer outer.From = inner.From; //the outer Skip is in place //reset the Take since we need both on the Select //for the formatter to work outer.Take = inner.Take; expression = new ProjectionExpression(outer, projection.Projector); } // fix up any order-by's we may have changed expression = OrderByRewriter.Rewrite(expression); return(expression); }