Package com.facebook.presto.sql.planner

Examples of com.facebook.presto.sql.planner.EqualityInference.rewriteExpression()

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            postAggregationConjuncts.addAll(ImmutableList.copyOf(filter(extractConjuncts(inheritedPredicate), not(deterministic()))));
            inheritedPredicate = stripNonDeterministicConjuncts(inheritedPredicate);

            // Sort non-equality predicates by those that can be pushed down and those that cannot
            for (Expression conjunct : EqualityInference.nonInferrableConjuncts(inheritedPredicate)) {
                Expression rewrittenConjunct = equalityInference.rewriteExpression(conjunct, in(node.getGroupBy()));
                if (rewrittenConjunct != null) {
                    pushdownConjuncts.add(rewrittenConjunct);
                }
                else {
                    postAggregationConjuncts.add(conjunct);
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            // Push inherited and source predicates to filtering source via a contrived join predicate (but needs to avoid touching NULL values in the filtering source)
            Expression joinPredicate = equalsExpression(node.getSourceJoinSymbol(), node.getFilteringSourceJoinSymbol());
            EqualityInference joinInference = createEqualityInference(inheritedPredicate, sourceEffectivePredicate, joinPredicate);
            for (Expression conjunct : Iterables.concat(EqualityInference.nonInferrableConjuncts(inheritedPredicate), EqualityInference.nonInferrableConjuncts(sourceEffectivePredicate))) {
                Expression rewrittenConjunct = joinInference.rewriteExpression(conjunct, equalTo(node.getFilteringSourceJoinSymbol()));
                if (rewrittenConjunct != null && DeterminismEvaluator.isDeterministic(rewrittenConjunct)) {
                    // Alter conjunct to include an OR filteringSourceJoinSymbol IS NULL disjunct
                    Expression rewrittenConjunctOrNull = expressionOrNullSymbols(equalTo(node.getFilteringSourceJoinSymbol())).apply(rewrittenConjunct);
                    filteringSourceConjuncts.add(rewrittenConjunctOrNull);
                }
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                    expressionOrNullSymbols(equalTo(node.getFilteringSourceJoinSymbol())))));

            // Push inheritedPredicates down to the source if they don't involve the semi join output
            EqualityInference inheritedInference = createEqualityInference(inheritedPredicate);
            for (Expression conjunct : EqualityInference.nonInferrableConjuncts(inheritedPredicate)) {
                Expression rewrittenConjunct = inheritedInference.rewriteExpression(conjunct, in(node.getSource().getOutputSymbols()));
                // Since each source row is reflected exactly once in the output, ok to push non-deterministic predicates down
                if (rewrittenConjunct != null) {
                    sourceConjuncts.add(rewrittenConjunct);
                }
                else {
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            postAggregationConjuncts.addAll(ImmutableList.copyOf(filter(extractConjuncts(inheritedPredicate), not(deterministic()))));
            inheritedPredicate = stripNonDeterministicConjuncts(inheritedPredicate);

            // Sort non-equality predicates by those that can be pushed down and those that cannot
            for (Expression conjunct : EqualityInference.nonInferrableConjuncts(inheritedPredicate)) {
                Expression rewrittenConjunct = equalityInference.rewriteExpression(conjunct, in(node.getGroupBy()));
                if (rewrittenConjunct != null) {
                    pushdownConjuncts.add(rewrittenConjunct);
                }
                else {
                    postAggregationConjuncts.add(conjunct);
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            // Push inherited and source predicates to filtering source via a contrived join predicate (but needs to avoid touching NULL values in the filtering source)
            Expression joinPredicate = equalsExpression(node.getSourceJoinSymbol(), node.getFilteringSourceJoinSymbol());
            EqualityInference joinInference = createEqualityInference(inheritedPredicate, sourceEffectivePredicate, joinPredicate);
            for (Expression conjunct : Iterables.concat(EqualityInference.nonInferrableConjuncts(inheritedPredicate), EqualityInference.nonInferrableConjuncts(sourceEffectivePredicate))) {
                Expression rewrittenConjunct = joinInference.rewriteExpression(conjunct, equalTo(node.getFilteringSourceJoinSymbol()));
                if (rewrittenConjunct != null && DeterminismEvaluator.isDeterministic(rewrittenConjunct)) {
                    // Alter conjunct to include an OR filteringSourceJoinSymbol IS NULL disjunct
                    Expression rewrittenConjunctOrNull = expressionOrNullSymbols(equalTo(node.getFilteringSourceJoinSymbol())).apply(rewrittenConjunct);
                    filteringSourceConjuncts.add(rewrittenConjunctOrNull);
                }
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                    expressionOrNullSymbols(equalTo(node.getFilteringSourceJoinSymbol())))));

            // Push inheritedPredicates down to the source if they don't involve the semi join output
            EqualityInference inheritedInference = createEqualityInference(inheritedPredicate);
            for (Expression conjunct : EqualityInference.nonInferrableConjuncts(inheritedPredicate)) {
                Expression rewrittenConjunct = inheritedInference.rewriteExpression(conjunct, in(node.getSource().getOutputSymbols()));
                // Since each source row is reflected exactly once in the output, ok to push non-deterministic predicates down
                if (rewrittenConjunct != null) {
                    sourceConjuncts.add(rewrittenConjunct);
                }
                else {
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            postAggregationConjuncts.addAll(ImmutableList.copyOf(filter(extractConjuncts(inheritedPredicate), not(deterministic()))));
            inheritedPredicate = stripNonDeterministicConjuncts(inheritedPredicate);

            // Sort non-equality predicates by those that can be pushed down and those that cannot
            for (Expression conjunct : EqualityInference.nonInferrableConjuncts(inheritedPredicate)) {
                Expression rewrittenConjunct = equalityInference.rewriteExpression(conjunct, in(node.getGroupBy()));
                if (rewrittenConjunct != null) {
                    pushdownConjuncts.add(rewrittenConjunct);
                }
                else {
                    postAggregationConjuncts.add(conjunct);
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