package com.tesora.dve.sql.transform;
/*
* #%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.SchemaException;
import com.tesora.dve.sql.ParserException.Pass;
import com.tesora.dve.sql.node.Edge;
import com.tesora.dve.sql.node.GeneralCollectingTraversal;
import com.tesora.dve.sql.node.LanguageNode;
import com.tesora.dve.sql.node.expression.FunctionCall;
import com.tesora.dve.sql.node.test.EngineConstant;
import com.tesora.dve.sql.util.ListSet;
public final class AggFunCollector extends GeneralCollectingTraversal {
private AggFunCollector() {
super(Order.POSTORDER,ExecStyle.ONCE);
}
public static ListSet<FunctionCall> collectAggFuns(LanguageNode in) {
return collect(in,new AggFunCollector());
}
public static ListSet<FunctionCall> collectAggFuns(Edge<?,?> in) {
return cast(collect(in,new AggFunCollector()));
}
@Override
public boolean is(LanguageNode iln) {
if (EngineConstant.FUNCTION.has(iln)) {
FunctionCall fc = (FunctionCall) iln;
if (fc.getFunctionName().isAggregate()) {
if (fc.getFunctionName().isUnsupportedAggregate())
throw new SchemaException(Pass.PLANNER, "Unsupported aggregation function: " + fc.getFunctionName().getSQL());
return true;
}
}
return false;
}
}