org.h2.expression.condition.PredicateWithSubquery Maven / Gradle / Ivy
/*
* Copyright 2004-2019 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.condition;
import org.h2.command.dml.Query;
import org.h2.engine.Session;
import org.h2.expression.Expression;
import org.h2.expression.ExpressionVisitor;
import org.h2.table.ColumnResolver;
import org.h2.table.TableFilter;
import org.h2.util.StringUtils;
/**
* Base class for predicates with a subquery.
*/
abstract class PredicateWithSubquery extends Condition {
/**
* The subquery.
*/
final Query query;
PredicateWithSubquery(Query query) {
this.query = query;
}
@Override
public void mapColumns(ColumnResolver resolver, int level, int state) {
query.mapColumns(resolver, level + 1);
}
@Override
public Expression optimize(Session session) {
session.optimizeQueryExpression(query);
return this;
}
@Override
public void setEvaluatable(TableFilter tableFilter, boolean value) {
query.setEvaluatable(tableFilter, value);
}
@Override
public StringBuilder getSQL(StringBuilder builder, boolean alwaysQuote) {
return StringUtils.indent(builder.append('('), query.getPlanSQL(alwaysQuote), 4, false).append(')');
}
@Override
public void updateAggregate(Session session, int stage) {
query.updateAggregate(session, stage);
}
@Override
public boolean isEverything(ExpressionVisitor visitor) {
return query.isEverything(visitor);
}
@Override
public int getCost() {
return query.getCostAsExpression();
}
}