package com.tesora.dve.sql.node.test;
/*
* #%L
* Tesora Inc.
* Database Virtualization Engine
* %%
* Copyright (C) 2011 - 2014 Tesora Inc.
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 this program. If not, see <http://www.gnu.org/licenses/>.
* #L%
*/
import com.tesora.dve.sql.jg.CollapsedJoinGraph;
import com.tesora.dve.sql.jg.UncollapsedJoinGraph;
import com.tesora.dve.sql.node.DerivedAttribute;
import com.tesora.dve.sql.node.LanguageNode;
import com.tesora.dve.sql.schema.SchemaContext;
import com.tesora.dve.sql.statement.dml.InsertIntoSelectStatement;
import com.tesora.dve.sql.statement.dml.MultiTableDMLStatement;
class Partitions extends DerivedAttribute<CollapsedJoinGraph> {
@Override
public boolean isApplicableSubject(LanguageNode ln) {
return EngineConstant.FROMCLAUSE.has(ln) || EngineConstant.WHERECLAUSE.has(ln);
}
@Override
public CollapsedJoinGraph computeValue(SchemaContext sc, LanguageNode ln) {
MultiTableDMLStatement mdml = null;
if (ln instanceof MultiTableDMLStatement)
mdml = (MultiTableDMLStatement) ln;
else if (ln instanceof InsertIntoSelectStatement) {
InsertIntoSelectStatement iiss = (InsertIntoSelectStatement) ln;
mdml = iiss.getSource();
}
UncollapsedJoinGraph ujg = new UncollapsedJoinGraph(sc,mdml);
CollapsedJoinGraph cjg = new CollapsedJoinGraph(sc,ujg);
return cjg;
}
}