Package org.apache.jackrabbit.oak.query.ast

Examples of org.apache.jackrabbit.oak.query.ast.SourceImpl

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        if (supportSQL1) {
            addColumnIfNecessary(list, QueryImpl.JCR_PATH, QueryImpl.JCR_PATH);
            addColumnIfNecessary(list, QueryImpl.JCR_SCORE, QueryImpl.JCR_SCORE);
        }
        read("FROM");
        SourceImpl source = parseSource();
        ColumnImpl[] columnArray = resolveColumns(list);
        ConstraintImpl constraint = null;
        if (readIf("WHERE")) {
            constraint = parseConstraint();
        }
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    }

    private SourceImpl parseSource() throws ParseException {
        SelectorImpl selector = parseSelector();
        selectors.put(selector.getSelectorName(), selector);
        SourceImpl source = selector;
        while (true) {
            JoinType joinType;
            if (readIf("RIGHT")) {
                read("OUTER");
                joinType = JoinType.RIGHT_OUTER;
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        if (supportSQL1) {
            addColumnIfNecessary(list, QueryImpl.JCR_PATH, QueryImpl.JCR_PATH);
            addColumnIfNecessary(list, QueryImpl.JCR_SCORE, QueryImpl.JCR_SCORE);
        }
        read("FROM");
        SourceImpl source = parseSource();
        ColumnImpl[] columnArray = resolveColumns(list);
        ConstraintImpl constraint = null;
        if (readIf("WHERE")) {
            constraint = parseConstraint();
        }
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    }

    private SourceImpl parseSource() throws ParseException {
        SelectorImpl selector = parseSelector();
        selectors.put(selector.getSelectorName(), selector);
        SourceImpl source = selector;
        while (true) {
            JoinType joinType;
            if (readIf("RIGHT")) {
                read("OUTER");
                joinType = JoinType.RIGHT_OUTER;
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        if (supportSQL1) {
            addColumnIfNecessary(list, QueryImpl.JCR_PATH, QueryImpl.JCR_PATH);
            addColumnIfNecessary(list, QueryImpl.JCR_SCORE, QueryImpl.JCR_SCORE);
        }
        read("FROM");
        SourceImpl source = parseSource();
        ColumnImpl[] columnArray = resolveColumns(list);
        ConstraintImpl constraint = null;
        if (readIf("WHERE")) {
            constraint = parseConstraint();
        }
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    }

    private SourceImpl parseSource() throws ParseException {
        SelectorImpl selector = parseSelector();
        selectors.put(selector.getSelectorName(), selector);
        SourceImpl source = selector;
        while (true) {
            JoinType joinType;
            if (readIf("RIGHT")) {
                read("OUTER");
                joinType = JoinType.RIGHT_OUTER;
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            estimatedCost = source.prepare().getEstimatedCost();
            return;
        }

        // use a greedy algorithm
        SourceImpl result = null;
        Set<SourceImpl> available = new HashSet<SourceImpl>();
        while (sources.size() > 0) {
            int bestIndex = 0;
            double bestCost = Double.POSITIVE_INFINITY;
            ExecutionPlan bestPlan = null;
            SourceImpl best = null;
            for (int i = 0; i < sources.size(); i++) {
                SourceImpl test = buildJoin(result, sources.get(i), conditions);
                if (test == null) {
                    // no join condition
                    continue;
                }
                ExecutionPlan testPlan = test.prepare();
                double cost = testPlan.getEstimatedCost();
                if (best == null || cost < bestCost) {
                    bestPlan = testPlan;
                    bestCost = cost;
                    bestIndex = i;
                    best = test;
                }
                test.unprepare();
            }
            available.add(sources.remove(bestIndex));
            result = best;
            best.prepare(bestPlan);
        }
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        if (supportSQL1) {
            addColumnIfNecessary(list, Query.JCR_PATH, Query.JCR_PATH);
            addColumnIfNecessary(list, Query.JCR_SCORE, Query.JCR_SCORE);
        }
        read("FROM");
        SourceImpl source = parseSource();
        ColumnImpl[] columnArray = resolveColumns(list);
        ConstraintImpl constraint = null;
        if (readIf("WHERE")) {
            constraint = parseConstraint();
        }
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    }

    private SourceImpl parseSource() throws ParseException {
        SelectorImpl selector = parseSelector();
        selectors.put(selector.getSelectorName(), selector);
        SourceImpl source = selector;
        while (true) {
            JoinType joinType;
            if (readIf("RIGHT")) {
                read("OUTER");
                joinType = JoinType.RIGHT_OUTER;
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        read();
        boolean explain = readIf("EXPLAIN");
        read("SELECT");
        ArrayList<ColumnOrWildcard> list = parseColumns();
        read("FROM");
        SourceImpl source = parseSource();
        ColumnImpl[] columnArray = resolveColumns(list);
        ConstraintImpl constraint = null;
        if (readIf("WHERE")) {
            constraint = parseConstraint();
        }
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Related Classes of org.apache.jackrabbit.oak.query.ast.SourceImpl

  • org.apache.jackrabbit.oak.query.QueryImpl
  • org.apache.jackrabbit.oak.query.SQL2Parser
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