/* * 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.config.ViewDefinition; import org.apache.cassandra.cql3.CFName; import org.apache.cassandra.db.view.View; import org.apache.cassandra.exceptions.InvalidRequestException; import org.apache.cassandra.exceptions.RequestValidationException; import org.apache.cassandra.exceptions.UnauthorizedException; import org.apache.cassandra.schema.TableParams; import org.apache.cassandra.service.ClientState; import org.apache.cassandra.service.MigrationManager; import org.apache.cassandra.transport.Event; import static org.apache.cassandra.thrift.ThriftValidation.validateColumnFamily; public class AlterViewStatement extends SchemaAlteringStatement { private final TableAttributes attrs; public AlterViewStatement(CFName name, TableAttributes attrs) { super(name); this.attrs = attrs; } public void checkAccess(ClientState state) throws UnauthorizedException, InvalidRequestException { CFMetaData baseTable = View.findBaseTable(keyspace(), columnFamily()); if (baseTable != null) state.hasColumnFamilyAccess(keyspace(), baseTable.cfName, Permission.ALTER); } public void validate(ClientState state) { // validated in announceMigration() } public Event.SchemaChange announceMigration(boolean isLocalOnly) throws RequestValidationException { CFMetaData meta = validateColumnFamily(keyspace(), columnFamily()); if (!meta.isView()) throw new InvalidRequestException("Cannot use ALTER MATERIALIZED VIEW on Table"); ViewDefinition viewCopy = Schema.instance.getView(keyspace(), columnFamily()).copy(); if (attrs == null) throw new InvalidRequestException("ALTER MATERIALIZED VIEW WITH invoked, but no parameters found"); attrs.validate(); TableParams params = attrs.asAlteredTableParams(viewCopy.metadata.params); if (params.gcGraceSeconds == 0) { throw new InvalidRequestException("Cannot alter gc_grace_seconds of a materialized view to 0, since this " + "value is used to TTL undelivered updates. Setting gc_grace_seconds too " + "low might cause undelivered updates to expire before being replayed."); } viewCopy.metadata.params(params); MigrationManager.announceViewUpdate(viewCopy, isLocalOnly); return new Event.SchemaChange(Event.SchemaChange.Change.UPDATED, Event.SchemaChange.Target.TABLE, keyspace(), columnFamily()); } public String toString() { return String.format("AlterViewStatement(name=%s)", cfName); } }