/**
* Copyright (C) 2009-2013 FoundationDB, LLC
*
* 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.foundationdb.server.types.texpressions;
import com.foundationdb.qp.operator.Operator;
import com.foundationdb.qp.operator.QueryContext;
import com.foundationdb.qp.rowtype.RowType;
import com.foundationdb.server.explain.*;
import com.foundationdb.server.types.TPreptimeValue;
import com.foundationdb.util.ArgumentValidation;
abstract class SubqueryTExpression implements TPreparedExpression {
@Override
public TPreptimeValue evaluateConstant(QueryContext queryContext) {
return new TPreptimeValue(resultType());
}
@Override
public CompoundExplainer getExplainer(ExplainContext context) {
Attributes states = new Attributes();
states.put(Label.OPERAND, subquery.getExplainer(context));
states.put(Label.OUTER_TYPE, outerRowType == null
? PrimitiveExplainer.getInstance("<EMPTY>")
:outerRowType.getExplainer(context));
states.put(Label.INNER_TYPE, innerRowType == null
? PrimitiveExplainer.getInstance("<EMPTY>")
: innerRowType.getExplainer(context));
states.put(Label.BINDING_POSITION, PrimitiveExplainer.getInstance(bindingPosition));
return new CompoundExplainer(Type.SUBQUERY, states);
}
// for use by subclasses
protected final Operator subquery() {
return subquery;
}
protected final RowType outerRowType() {
return outerRowType;
}
protected final RowType innerRowType() {
return innerRowType;
}
protected final int bindingPosition() {
return bindingPosition;
}
SubqueryTExpression(Operator subquery, RowType outerRowType,
RowType innerRowType, int bindingPosition) {
ArgumentValidation.notNull("subquery", subquery);
ArgumentValidation.isGTE("binding position", bindingPosition, 0);
this.subquery = subquery;
this.outerRowType = outerRowType;
this.innerRowType = innerRowType;
this.bindingPosition = bindingPosition;
}
private final Operator subquery;
private final RowType outerRowType;
private final RowType innerRowType;
private final int bindingPosition;
}