blob: bec57b715b1d82bcb854694d3a90df66abafaab7 [file] [log] [blame]
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you 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 org.apache.calcite.sql.validate;
import org.apache.calcite.rel.type.RelDataType;
import org.apache.calcite.sql.SqlNode;
import org.apache.calcite.sql.SqlWith;
import org.apache.calcite.sql.SqlWithItem;
import org.apache.calcite.util.Util;
import org.checkerframework.checker.nullness.qual.Nullable;
import static java.util.Objects.requireNonNull;
/**
* Namespace for <code>WITH</code> clause.
*/
public class WithNamespace extends AbstractNamespace {
//~ Instance fields --------------------------------------------------------
private final SqlWith with;
//~ Constructors -----------------------------------------------------------
/**
* Creates a TableConstructorNamespace.
*
* @param validator Validator
* @param with WITH clause
* @param enclosingNode Enclosing node
*/
WithNamespace(SqlValidatorImpl validator,
SqlWith with,
SqlNode enclosingNode) {
super(validator, enclosingNode);
this.with = with;
}
//~ Methods ----------------------------------------------------------------
@Override protected RelDataType validateImpl(RelDataType targetRowType) {
for (SqlNode withItem : with.withList) {
validator.validateWithItem((SqlWithItem) withItem);
}
final SqlValidatorScope scope2 =
validator.getWithScope(Util.last(with.withList));
final SqlValidatorNamespace bodyNamespace =
requireNonNull(validator.getNamespace(with.body), "namespace");
validator.validateQuery(with.body, scope2, targetRowType);
final RelDataType rowType = validator.getValidatedNodeType(with.body);
validator.setValidatedNodeType(with, rowType);
mustFilterFields = bodyNamespace.getMustFilterFields();
return rowType;
}
@Override public @Nullable SqlNode getNode() {
return with;
}
}