/*
* Copyright 2004-2023 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (https://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.expression;
import org.h2.engine.SessionLocal;
import org.h2.table.ColumnResolver;
import org.h2.table.TableFilter;
/**
* Operation without subexpressions.
*/
public abstract class Operation0 extends Expression {
protected Operation0() {
}
@Override
public void mapColumns(ColumnResolver resolver, int level, int state) {
// Nothing to do
}
@Override
public Expression optimize(SessionLocal session) {
return this;
}
@Override
public void setEvaluatable(TableFilter tableFilter, boolean value) {
// Nothing to do
}
@Override
public void updateAggregate(SessionLocal session, int stage) {
// Nothing to do
}
}