Examples of org.hsqldb_voltpatches.VoltXMLElement

org.hsqldb_voltpatches.VoltXMLElement
Used to fake generate XML without actually generating the text and parsing it. A performance optimization, and something of a simplicity win

    public void testENG_912() throws HSQLParseException {
        String schema = "create table tmc (name varchar(32), user varchar(32), primary key (name, user));";
        HSQLInterface hsql = HSQLInterface.loadHsqldb();


        hsql.runDDLCommand(schema);
        VoltXMLElement xml = hsql.getXMLFromCatalog();
        System.out.println(xml);
        assertTrue(xml != null);


    }

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        hsql.runDDLCommand(table);


        String view = "create view v (name , user ) as select name , user from tmc where name = 'name';";
        hsql.runDDLCommand(view);


        VoltXMLElement xml = hsql.getXMLFromCatalog();
        System.out.println(xml);
        assertTrue(xml != null);


    }

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    }


    public static ParameterizationInfo parameterize(VoltXMLElement xmlSQL) {
        assert(xmlSQL != null);


        VoltXMLElement parameterizedXmlSQL = xmlSQL.duplicate();


        Map<String, Integer> idToParamIndexMap = new HashMap<String, Integer>();
        List<String> paramValues = new ArrayList<String>();


        parameterizeRecursively(parameterizedXmlSQL, idToParamIndexMap, paramValues);

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            for (VoltXMLElement xmlChildSQL : parameterizedXmlSQL.children) {
                parameterizeRecursively(xmlChildSQL, idToParamIndexMap, paramValues);
            }
        } else {
            // find the parameters xml node
            VoltXMLElement paramsNode = null;
            for (VoltXMLElement child : parameterizedXmlSQL.children) {
                if (child.name.equals("parameters")) {
                    paramsNode = child;
                }
            }

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                // starting at 0.
                paramIndex = paramValues.size();
                // Later references to this value's id will re-use this same param index.
                idToParamIndexMap.put(idStr, paramIndex);


                VoltXMLElement paramIndexNode = new VoltXMLElement("parameter");
                paramIndexNode.attributes.put("index", String.valueOf(paramIndex));
                String typeStr = node.attributes.get("valuetype");
                paramIndexNode.attributes.put("valuetype", typeStr);
                paramIndexNode.attributes.put("id", idStr);
                paramsNode.children.add(paramIndexNode);

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    void parse(VoltXMLElement stmtNode) {
        String node;
        if ((node = stmtNode.attributes.get("distinct")) != null)
            m_distinct = Boolean.parseBoolean(node);


        VoltXMLElement limitElement = null, offsetElement = null, havingElement = null;
        VoltXMLElement displayElement = null, orderbyElement = null, groupbyElement = null;
        for (VoltXMLElement child : stmtNode.children) {
            if (child.name.equalsIgnoreCase("limit")) {
                limitElement = child;
            } else if (child.name.equalsIgnoreCase("offset")) {
                offsetElement = child;

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            // Parse limit
            if ((node = limitNode.attributes.get("limit_paramid")) != null)
                m_limitParameterId = Long.parseLong(node);
            else {
                assert(limitNode.children.size() == 1);
                VoltXMLElement valueNode = limitNode.children.get(0);
                String isParam = valueNode.attributes.get("isparam");
                if ((isParam != null) && (isParam.equalsIgnoreCase("true"))) {
                    m_limitParameterId = Long.parseLong(valueNode.attributes.get("id"));
                } else {
                    node = limitNode.attributes.get("limit");
                    assert(node != null);
                    m_limit = Long.parseLong(node);
                }
            }
        }
        if (offsetNode != null) {
            // Parse offset
            if ((node = offsetNode.attributes.get("offset_paramid")) != null)
                m_offsetParameterId = Long.parseLong(node);
            else {
                if (offsetNode.children.size() == 1) {
                    VoltXMLElement valueNode = offsetNode.children.get(0);
                    String isParam = valueNode.attributes.get("isparam");
                    if ((isParam != null) && (isParam.equalsIgnoreCase("true"))) {
                        m_offsetParameterId = Long.parseLong(valueNode.attributes.get("id"));
                    } else {
                        node = offsetNode.attributes.get("offset");

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        // get desc/asc
        String desc = orderByNode.attributes.get("desc");
        boolean descending = (desc != null) && (desc.equalsIgnoreCase("true"));


        // get the columnref or other expression inside the orderby node
        VoltXMLElement child = orderByNode.children.get(0);
        assert(child != null);


        // create the orderby column
        ParsedColInfo order_col = new ParsedColInfo();
        order_col.orderBy = true;

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            //   INSERT INTO ... SELECT ...


            AbstractExpression expr = null;
            if (child.children.size() != 0) {
                assert(child.children.size() == 1);
                VoltXMLElement subChild = child.children.get(0);
                expr = parseExpressionTree(subChild);
                assert(expr != null);
                expr.refineValueType(VoltType.get((byte)col.getType()), col.getSize());
                ExpressionUtil.finalizeValueTypes(expr);
            }

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            String valueType = exprNode.attributes.get("valuetype");
            expr.setValueType(VoltType.typeFromString(valueType));
        }


        // get the first (left) node that is an element
        VoltXMLElement leftExprNode = exprNode.children.get(0);
        assert(leftExprNode != null);


        // recursively parse the left subtree (could be another operator or
        // a constant/tuple/param value operand).
        AbstractExpression leftExpr = parseExpressionTree(leftExprNode);
        assert((leftExpr != null) || (exprType == ExpressionType.AGGREGATE_COUNT));
        expr.setLeft(leftExpr);


        // get the second (right) node that is an element (might be null)
        VoltXMLElement rightExprNode = null;
        if (exprNode.children.size() > 1) {
            rightExprNode = exprNode.children.get(1);
        }


        if (expr.needsRightExpression()) {

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Related Classes of org.hsqldb_voltpatches.VoltXMLElement

org.voltdb.compiler.DDLCompiler

org.voltdb.compiler.TestDDLCompiler

org.voltdb.compiler.TestVoltXMLElement

org.voltdb.planner.AbstractParsedStmt

org.voltdb.planner.ParameterizationInfo

org.voltdb.planner.ParsedSelectStmt

org.voltdb.planner.TestParsedStatements

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