/* This file is part of VoltDB.
* Copyright (C) 2008-2010 VoltDB L.L.C.
*
* VoltDB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* VoltDB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with VoltDB. If not, see <http://www.gnu.org/licenses/>.
*/
package org.voltdb.planner;
import java.util.HashMap;
import org.voltdb.VoltType;
import org.voltdb.catalog.Column;
import org.voltdb.catalog.Database;
import org.voltdb.catalog.Table;
import org.voltdb.expressions.AbstractExpression;
import org.voltdb.expressions.ExpressionUtil;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
/**
*
*
*/
public class ParsedUpdateStmt extends AbstractParsedStmt {
Table table = null;
HashMap<Column, AbstractExpression> columns = new HashMap<Column, AbstractExpression>();
@Override
void parse(Node stmtNode, Database db) {
NamedNodeMap attrs = stmtNode.getAttributes();
Node node = attrs.getNamedItem("table");
assert(node != null);
String tableName = node.getNodeValue().trim();
table = db.getTables().getIgnoreCase(tableName);
tableList.add(table);
for (Node child = stmtNode.getFirstChild(); child != null; child = child.getNextSibling()) {
if (child.getNodeType() != Node.ELEMENT_NODE)
continue;
if (child.getNodeName().equalsIgnoreCase("columns"))
parseColumns(child, db);
else if (child.getNodeName().equalsIgnoreCase("condition"))
parseCondition(child, db);
}
}
void parseColumns(Node columnsNode, Database db) {
for (Node child = columnsNode.getFirstChild(); child != null; child = child.getNextSibling()) {
if (child.getNodeType() != Node.ELEMENT_NODE)
continue;
assert(child.getNodeName().equals("column"));
Column col = null;
NamedNodeMap attrs = child.getAttributes();
Node node = attrs.getNamedItem("table");
assert(node != null);
assert(node.getNodeValue().equalsIgnoreCase(table.getTypeName()));
node = attrs.getNamedItem("name");
assert(node != null);
col = table.getColumns().getIgnoreCase(node.getNodeValue().trim());
AbstractExpression expr = null;
for (Node subChild = child.getFirstChild(); subChild != null; subChild = subChild.getNextSibling()) {
if (subChild.getNodeType() != Node.ELEMENT_NODE)
continue;
expr = parseExpressionTree(subChild, db);
ExpressionUtil.assignLiteralConstantTypesRecursively(expr, VoltType.get((byte)col.getType()));
ExpressionUtil.assignOutputValueTypesRecursively(expr);
}
assert(expr != null);
columns.put(col, expr);
}
}
void parseCondition(Node conditionNode, Database db) {
Node exprNode = conditionNode.getFirstChild();
while ((exprNode != null) && (exprNode.getNodeType() != Node.ELEMENT_NODE))
exprNode = exprNode.getNextSibling();
if (exprNode == null)
return;
where = parseExpressionTree(exprNode, db);
ExpressionUtil.assignLiteralConstantTypesRecursively(where);
ExpressionUtil.assignOutputValueTypesRecursively(where);
}
@Override
public String toString() {
String retval = super.toString() + "\n";
retval += "COLUMNS:\n";
for (Column col : columns.keySet()) {
retval += "\tColumn: " + col.getTypeName() + ": ";
retval += columns.get(col).toString() + "\n";
}
retval = retval.trim();
return retval;
}
}