Examples of edu.brown.expressions.ExpressionTreeWalker

edu.brown.expressions.ExpressionTreeWalker
Utility class to help with walking through Note that this does operations in a DEPTH-FIRST FASHION

                        AbstractExpression exp = column.getExpression();


                        // Now extract the CatalogType objects that are being
                        // referenced by this materialization column
                        final List<CatalogType> catalog_refs = new ArrayList<CatalogType>();
                        new ExpressionTreeWalker() {
                            @Override
                            protected void callback(AbstractExpression exp) {
                                if (!(exp instanceof AbstractValueExpression))
                                    return;
                                CatalogType element = null;

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                                                   final boolean convert_params,
                                                   final Collection<Table> tables) throws Exception {
        if (debug.val)
            LOG.debug(catalog_stmt + "\n" + ExpressionUtil.debug(root_exp));


        new ExpressionTreeWalker() {
            {
                this.setAllowRevisit(true);
            }


            boolean on_leftside = true;

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            } catch (Exception ex) {
                throw new RuntimeException("Unable to clone " + orig_pc, ex);
            }


            try {
                new ExpressionTreeWalker() {
                    @Override
                    protected void callback(AbstractExpression exp_element) {
                        if (exp_element instanceof TupleValueExpression) {
                            TupleValueExpression tv_exp = (TupleValueExpression) exp_element;
                            int orig_idx = tv_exp.getColumnIndex();

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        }


        // Get all of the AbstractExpression roots for this node
        // Now fix the offsets for everyone
        for (AbstractExpression exp : expressions_to_fix) {
            new ExpressionTreeWalker() {
                @Override
                protected void callback(AbstractExpression exp_element) {
                    if (exp_element instanceof TupleValueExpression) {
                        TupleValueExpression tv_exp = (TupleValueExpression) exp_element;
                        int orig_idx = tv_exp.getColumnIndex();

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        Collection<AbstractExpression> exps = CollectionUtils.union(PlanNodeUtil.getExpressionsForPlanNode(node),
                                                                    PlanNodeUtil.getOutputExpressionsForPlanNode(node));
        assert(exps.size() > 0) : "No Expressions: " + node;
        for (AbstractExpression exp : exps) {
            new ExpressionTreeWalker() {
                @Override
                protected void callback(AbstractExpression exp_element) {
                    if (exp_element instanceof TupleValueExpression) {
                         System.out.println("element column: " +
                         ((TupleValueExpression)exp_element).getColumnAlias()

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            // check the offsets of the output column
            // Set<TupleValueExpression> ExpressionUtil.getExpressions(node,
            // TupleValueExpression.class);
            for (Integer col_guid : node.getOutputColumnGUIDs()) {
                PlanColumn plan_col = PlannerContext.singleton().get(col_guid);
                new ExpressionTreeWalker() {
                    @Override
                    protected void callback(AbstractExpression element) {
                        if (element.getClass().equals(TupleValueExpression.class)) {
                            assert (element.getExpressionType().equals(ExpressionType.VALUE_TUPLE)) : "plan column expression type is: " + element.getExpressionType() + " NOT TupleValueExpression";
                            TupleValueExpression tv_exp = (TupleValueExpression) element;

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Related Classes of edu.brown.expressions.ExpressionTreeWalker

edu.brown.catalog.CatalogUtil

edu.brown.optimizer.BasePlanOptimizerTestCase

edu.brown.optimizer.PlanOptimizerUtil

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