Package org.voltdb.types

Examples of org.voltdb.types.ExpressionType

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        reverses.put(ExpressionType.COMPARE_LESSTHANOREQUALTO, ExpressionType.COMPARE_GREATERTHANOREQUALTO);
        reverses.put(ExpressionType.COMPARE_GREATERTHANOREQUALTO, ExpressionType.COMPARE_LESSTHANOREQUALTO);
    }

    public ComparisonExpression reverseOperator() {
        ExpressionType reverseType = reverses.get(this.m_type);
        // Left and right exprs are reversed on purpose
        return new ComparisonExpression(reverseType, m_right, m_left);
    }
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        return ender;
    }

    /// Construct the lower bound comparison filter implied by a prefix LIKE comparison.
    public ComparisonExpression getGteFilterFromPrefixLike() {
        ExpressionType rangeComparator = ExpressionType.COMPARE_GREATERTHANOREQUALTO;
        String comparand = extractLikePatternPrefix();
        return rangeFilterFromPrefixLike(m_left, rangeComparator, comparand);
    }
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        return rangeFilterFromPrefixLike(m_left, rangeComparator, comparand);
    }

    /// Construct the upper bound comparison filter implied by a prefix LIKE comparison.
    public ComparisonExpression getLtFilterFromPrefixLike() {
        ExpressionType rangeComparator = ExpressionType.COMPARE_LESSTHAN;
        String comparand = extractAndIncrementLikePatternPrefix();
        return rangeFilterFromPrefixLike(m_left, rangeComparator, comparand);
    }
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        return rangeFilterFromPrefixLike(m_left, rangeComparator, comparand);
    }

    @Override
    public String explain(String impliedTableName) {
        ExpressionType type = getExpressionType();
        return "(" + m_left.explain(impliedTableName) +
            " " + type.symbol() + " " +
            m_right.explain(impliedTableName) + ")";
    }
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     * @param expr
     * @param tableAlias
     * @return
     */
    public static boolean isNullRejectingExpression(AbstractExpression expr, String tableAlias) {
        ExpressionType exprType = expr.getExpressionType();
        if (exprType == ExpressionType.CONJUNCTION_AND) {
            assert(expr.m_left != null && expr.m_right != null);
            return isNullRejectingExpression(expr.m_left, tableAlias) || isNullRejectingExpression(expr.m_right, tableAlias);
        } else if (exprType == ExpressionType.CONJUNCTION_OR) {
            assert(expr.m_left != null && expr.m_right != null);
            return isNullRejectingExpression(expr.m_left, tableAlias) && isNullRejectingExpression(expr.m_right, tableAlias);
        } else if (exprType == ExpressionType.OPERATOR_NOT) {
            assert(expr.m_left != null);
            // "NOT ( P and Q )" is as null-rejecting as "NOT P or NOT Q"
            // "NOT ( P or Q )" is as null-rejecting as "NOT P and NOT Q"
            // Handling AND and OR expressions requires a "negated" flag to the recursion that tweaks
            // (switches?) the handling of ANDs and ORs to enforce the above equivalences.
            if (expr.m_left.getExpressionType() == ExpressionType.OPERATOR_IS_NULL) {
                return containsMatchingTVE(expr, tableAlias);
            } else if (expr.m_left.getExpressionType() == ExpressionType.CONJUNCTION_AND ||
                    expr.m_left.getExpressionType() == ExpressionType.CONJUNCTION_OR) {
                assert(expr.m_left.m_left != null && expr.m_left.m_right != null);
                // Need to test for an existing child NOT and skip it.
                // e.g. NOT (P AND NOT Q) --> (NOT P) OR NOT NOT Q --> (NOT P) OR Q
                AbstractExpression tempLeft = null;
                if (expr.m_left.m_left.getExpressionType() != ExpressionType.OPERATOR_NOT) {
                    tempLeft = new OperatorExpression(ExpressionType.OPERATOR_NOT, expr.m_left.m_left, null);
                } else {
                    assert(expr.m_left.m_left.m_left != null);
                    tempLeft = expr.m_left.m_left.m_left;
                }
                AbstractExpression tempRight = null;
                if (expr.m_left.m_right.getExpressionType() != ExpressionType.OPERATOR_NOT) {
                    tempRight = new OperatorExpression(ExpressionType.OPERATOR_NOT, expr.m_left.m_right, null);
                } else {
                    assert(expr.m_left.m_right.m_left != null);
                    tempRight = expr.m_left.m_right.m_left;
                }
                ExpressionType type = (expr.m_left.getExpressionType() == ExpressionType.CONJUNCTION_AND) ?
                        ExpressionType.CONJUNCTION_OR : ExpressionType.CONJUNCTION_AND;
                AbstractExpression tempExpr = new OperatorExpression(type, tempLeft, tempRight);
                return isNullRejectingExpression(tempExpr, tableAlias);
            } else if (expr.m_left.getExpressionType() == ExpressionType.OPERATOR_NOT) {
                // It's probably safe to assume that HSQL will have stripped out other double negatives,
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        return fromJSONObject(jobj.getJSONObject(label), tableScan);
    }

    private static AbstractExpression fromJSONObject(JSONObject obj,  StmtTableScan tableScan) throws JSONException
    {
        ExpressionType type = ExpressionType.get(obj.getInt(Members.TYPE.name()));
        AbstractExpression expr;
        try {
            expr = type.getExpressionClass().newInstance();
        } catch (InstantiationException e) {
            e.printStackTrace();
            return null;
        } catch (IllegalAccessException e) {
            e.printStackTrace();
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    @Override
    public void finalizeValueTypes()
    {
        finalizeChildValueTypes();
        ExpressionType type = getExpressionType();
        switch (type) {
        case AGGREGATE_COUNT:
        case AGGREGATE_COUNT_STAR:
            //
            // Always an integer
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        }
    }

    @Override
    public String explain(String impliedTableName) {
        ExpressionType type = getExpressionType();
        if (type == ExpressionType.AGGREGATE_COUNT_STAR) {
            return "COUNT(*)";
        }
        return type.symbol() + ( m_distinct ? " DISTINCT(" : "(" ) +
            m_left.explain(impliedTableName) + ")";
    }
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     * @return
     */
    private AbstractExpression parseOperationExpression(VoltXMLElement exprNode) {

        String optype = exprNode.attributes.get("optype");
        ExpressionType exprType = ExpressionType.get(optype);
        AbstractExpression expr = null;

        if (exprType == ExpressionType.INVALID) {
            throw new PlanningErrorException("Unsupported operation type '" + optype + "'");
        }
        try {
            expr = exprType.getExpressionClass().newInstance();
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException(e.getMessage(), e);
        }
        expr.setExpressionType(exprType);
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     */

    private AbstractExpression parseAggregationExpression(VoltXMLElement exprNode)
    {
        String type = exprNode.attributes.get("optype");
        ExpressionType exprType = ExpressionType.get(type);

        if (exprType == ExpressionType.INVALID) {
            throw new PlanningErrorException("Unsupported aggregation type '" + type + "'");
        }

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Related Classes of org.voltdb.types.ExpressionType

  • edu.brown.expressions.ExpressionUtil
  • edu.brown.optimizer.optimizations.AggregatePushdownOptimization
  • edu.brown.plannodes.TestPlanNodeUtil
  • edu.brown.utils.PartitionEstimator
  • org.voltdb.expressions.AbstractExpression
  • org.voltdb.expressions.AggregateExpression
  • org.voltdb.expressions.ComparisonExpression
  • org.voltdb.expressions.ConjunctionExpression
  • org.voltdb.expressions.ExpressionUtil
  • org.voltdb.expressions.OperatorExpression
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