/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.facebook.presto.sql.planner.sanity;
import com.facebook.presto.Session;
import com.facebook.presto.metadata.Metadata;
import com.facebook.presto.spi.type.Type;
import com.facebook.presto.sql.parser.SqlParser;
import com.facebook.presto.sql.planner.ExpressionExtractor;
import com.facebook.presto.sql.planner.Symbol;
import com.facebook.presto.sql.planner.plan.PlanNode;
import com.facebook.presto.sql.tree.DefaultTraversalVisitor;
import com.facebook.presto.sql.tree.Expression;
import com.facebook.presto.sql.tree.SubqueryExpression;
import java.util.Map;
import static java.lang.String.format;
public final class NoSubqueryExpressionLeftChecker
implements PlanSanityChecker.Checker
{
@Override
public void validate(PlanNode plan, Session session, Metadata metadata, SqlParser sqlParser, Map<Symbol, Type> types)
{
for (Expression expression : ExpressionExtractor.extractExpressions(plan)) {
new DefaultTraversalVisitor<Void, Void>()
{
@Override
protected Void visitSubqueryExpression(SubqueryExpression node, Void context)
{
throw new IllegalStateException(format("Unexpected subquery expression in logical plan: %s", node));
}
}.process(expression, null);
}
}
}