org.apache.calcite.sql.ddl.SqlDropMaterializedView Maven / Gradle / Ivy
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* 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.ddl;
import org.apache.calcite.jdbc.CalcitePrepare;
import org.apache.calcite.jdbc.CalciteSchema;
import org.apache.calcite.materialize.MaterializationKey;
import org.apache.calcite.materialize.MaterializationService;
import org.apache.calcite.schema.Table;
import org.apache.calcite.schema.Wrapper;
import org.apache.calcite.sql.SqlIdentifier;
import org.apache.calcite.sql.SqlKind;
import org.apache.calcite.sql.SqlOperator;
import org.apache.calcite.sql.SqlSpecialOperator;
import org.apache.calcite.sql.parser.SqlParserPos;
import org.apache.calcite.util.Pair;
/**
* Parse tree for {@code DROP MATERIALIZED VIEW} statement.
*/
public class SqlDropMaterializedView extends SqlDropObject {
private static final SqlOperator OPERATOR =
new SqlSpecialOperator("DROP MATERIALIZED VIEW",
SqlKind.DROP_MATERIALIZED_VIEW);
/** Creates a SqlDropMaterializedView. */
SqlDropMaterializedView(SqlParserPos pos, boolean ifExists,
SqlIdentifier name) {
super(OPERATOR, pos, ifExists, name);
}
@Override public void execute(CalcitePrepare.Context context) {
final Pair pair =
SqlDdlNodes.schema(context, true, name);
final Table table = pair.left.plus().getTable(pair.right);
if (table != null) {
// Materialized view exists.
super.execute(context);
if (table instanceof Wrapper) {
final MaterializationKey materializationKey =
((Wrapper) table).unwrap(MaterializationKey.class);
if (materializationKey != null) {
MaterializationService.instance()
.removeMaterialization(materializationKey);
}
}
}
}
}
// End SqlDropMaterializedView.java