/* This file is part of VoltDB.
* Copyright (C) 2008-2017 VoltDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with VoltDB. If not, see <http://www.gnu.org/licenses/>.
*/
package org.voltdb.plannodes;
import java.util.Collection;
import org.json_voltpatches.JSONException;
import org.json_voltpatches.JSONObject;
import org.json_voltpatches.JSONStringer;
import org.voltdb.catalog.Database;
import org.voltdb.expressions.AbstractExpression;
import org.voltdb.expressions.AbstractSubqueryExpression;
import org.voltdb.types.PlanNodeType;
public class MaterializePlanNode extends ProjectionPlanNode {
public enum Members {
BATCHED; // OBSOLETE
}
public MaterializePlanNode() {
super();
}
public MaterializePlanNode(NodeSchema schema) {
super();
m_outputSchema = schema;
m_hasSignificantOutputSchema = true;
}
@Override
public PlanNodeType getPlanNodeType() {
return PlanNodeType.MATERIALIZE;
}
@Override
public void generateOutputSchema(Database db) {
// MaterializePlanNodes have no children
assert(m_children.size() == 0);
// MaterializePlanNode's output schema is pre-determined, don't touch
// except when its output column(s) has a scalar subquery expression
// Generate the output schema for subqueries if any
Collection<AbstractExpression> exprs = findAllSubquerySubexpressions();
for (AbstractExpression expr: exprs) {
((AbstractSubqueryExpression) expr).generateOutputSchema(db);
}
return;
}
@Override
public void resolveColumnIndexes() {
// MaterializePlanNodes have no children
assert(m_children.size() == 0);
resolveSubqueryColumnIndexes();
}
@Override
public void toJSONString(JSONStringer stringer) throws JSONException {
super.toJSONString(stringer);
stringer.keySymbolValuePair(Members.BATCHED.name(), false);
}
@Override
public void loadFromJSONObject(JSONObject jobj, Database db)
throws JSONException {
super.loadFromJSONObject(jobj, db);
assert( ! jobj.getBoolean(Members.BATCHED.name()));
}
@Override
protected String explainPlanForNode(String indent) {
return "MATERIALIZE TUPLE from parameters and/or literals";
}
}