/*
* 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;
import org.h2.value.TypeInfo;
/**
* Operation with one argument.
*/
public abstract class Operation1 extends Expression {
/**
* The argument of the operation.
*/
protected Expression arg;
/**
* The type of the result.
*/
protected TypeInfo type;
protected Operation1(Expression arg) {
this.arg = arg;
}
@Override
public TypeInfo getType() {
return type;
}
@Override
public void mapColumns(ColumnResolver resolver, int level, int state) {
arg.mapColumns(resolver, level, state);
}
@Override
public void setEvaluatable(TableFilter tableFilter, boolean value) {
arg.setEvaluatable(tableFilter, value);
}
@Override
public void updateAggregate(SessionLocal session, int stage) {
arg.updateAggregate(session, stage);
}
@Override
public boolean isEverything(ExpressionVisitor visitor) {
return arg.isEverything(visitor);
}
@Override
public int getCost() {
return arg.getCost() + 1;
}
@Override
public int getSubexpressionCount() {
return 1;
}
@Override
public Expression getSubexpression(int index) {
if (index == 0) {
return arg;
}
throw new IndexOutOfBoundsException();
}
}