| /* |
| * 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.cassandra.cql3.statements; |
| |
| import org.apache.cassandra.auth.Permission; |
| import org.apache.cassandra.config.CFMetaData; |
| import org.apache.cassandra.config.Schema; |
| import org.apache.cassandra.cql3.IndexName; |
| import org.apache.cassandra.cql3.QueryOptions; |
| import org.apache.cassandra.db.KeyspaceNotDefinedException; |
| import org.apache.cassandra.exceptions.*; |
| import org.apache.cassandra.schema.KeyspaceMetadata; |
| import org.apache.cassandra.service.ClientState; |
| import org.apache.cassandra.service.MigrationManager; |
| import org.apache.cassandra.service.QueryState; |
| import org.apache.cassandra.transport.Event; |
| import org.apache.cassandra.transport.messages.ResultMessage; |
| |
| public class DropIndexStatement extends SchemaAlteringStatement |
| { |
| public final String indexName; |
| public final boolean ifExists; |
| |
| public DropIndexStatement(IndexName indexName, boolean ifExists) |
| { |
| super(indexName.getCfName()); |
| this.indexName = indexName.getIdx(); |
| this.ifExists = ifExists; |
| } |
| |
| public String columnFamily() |
| { |
| CFMetaData cfm = lookupIndexedTable(); |
| return cfm == null ? null : cfm.cfName; |
| } |
| |
| public void checkAccess(ClientState state) throws UnauthorizedException, InvalidRequestException |
| { |
| CFMetaData cfm = lookupIndexedTable(); |
| if (cfm == null) |
| return; |
| |
| state.hasColumnFamilyAccess(cfm.ksName, cfm.cfName, Permission.ALTER); |
| } |
| |
| public void validate(ClientState state) |
| { |
| // validated in lookupIndexedTable() |
| } |
| |
| @Override |
| public ResultMessage execute(QueryState state, QueryOptions options, long queryStartNanoTime) throws RequestValidationException |
| { |
| Event.SchemaChange ce = announceMigration(state, false); |
| return ce == null ? null : new ResultMessage.SchemaChange(ce); |
| } |
| |
| public Event.SchemaChange announceMigration(QueryState queryState, boolean isLocalOnly) throws InvalidRequestException, ConfigurationException |
| { |
| CFMetaData cfm = lookupIndexedTable(); |
| if (cfm == null) |
| return null; |
| |
| CFMetaData updatedCfm = cfm.copy(); |
| updatedCfm.indexes(updatedCfm.getIndexes().without(indexName)); |
| MigrationManager.announceColumnFamilyUpdate(updatedCfm, isLocalOnly); |
| // Dropping an index is akin to updating the CF |
| // Note that we shouldn't call columnFamily() at this point because the index has been dropped and the call to lookupIndexedTable() |
| // in that method would now throw. |
| return new Event.SchemaChange(Event.SchemaChange.Change.UPDATED, Event.SchemaChange.Target.TABLE, cfm.ksName, cfm.cfName); |
| } |
| |
| /** |
| * The table for which the index should be dropped, or null if the index doesn't exist |
| * |
| * @return the metadata for the table containing the dropped index, or {@code null} |
| * if the index to drop cannot be found but "IF EXISTS" is set on the statement. |
| * |
| * @throws InvalidRequestException if the index cannot be found and "IF EXISTS" is not |
| * set on the statement. |
| */ |
| private CFMetaData lookupIndexedTable() |
| { |
| KeyspaceMetadata ksm = Schema.instance.getKSMetaData(keyspace()); |
| if (ksm == null) |
| throw new KeyspaceNotDefinedException("Keyspace " + keyspace() + " does not exist"); |
| |
| return ksm.findIndexedTable(indexName) |
| .orElseGet(() -> { |
| if (ifExists) |
| return null; |
| else |
| throw new InvalidRequestException(String.format("Index '%s' could not be found in any " + |
| "of the tables of keyspace '%s'", |
| indexName, keyspace())); |
| }); |
| } |
| } |