| /* |
| * 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.schema; |
| |
| import org.apache.cassandra.audit.AuditLogContext; |
| import org.apache.cassandra.audit.AuditLogEntryType; |
| import org.apache.cassandra.auth.Permission; |
| import org.apache.cassandra.cql3.CQLStatement; |
| import org.apache.cassandra.cql3.QualifiedName; |
| import org.apache.cassandra.schema.*; |
| import org.apache.cassandra.schema.KeyspaceMetadata.KeyspaceDiff; |
| import org.apache.cassandra.schema.Keyspaces.KeyspacesDiff; |
| import org.apache.cassandra.service.ClientState; |
| import org.apache.cassandra.transport.Event.SchemaChange; |
| import org.apache.cassandra.transport.Event.SchemaChange.Change; |
| import org.apache.cassandra.transport.Event.SchemaChange.Target; |
| |
| public final class DropIndexStatement extends AlterSchemaStatement |
| { |
| private final String indexName; |
| private final boolean ifExists; |
| |
| public DropIndexStatement(String keyspaceName, String indexName, boolean ifExists) |
| { |
| super(keyspaceName); |
| this.indexName = indexName; |
| this.ifExists = ifExists; |
| } |
| |
| public Keyspaces apply(Keyspaces schema) |
| { |
| KeyspaceMetadata keyspace = schema.getNullable(keyspaceName); |
| |
| TableMetadata table = null == keyspace |
| ? null |
| : keyspace.findIndexedTable(indexName).orElse(null); |
| |
| if (null == table) |
| { |
| if (ifExists) |
| return schema; |
| |
| throw ire("Index '%s.%s' doesn't exist'", keyspaceName, indexName); |
| } |
| |
| TableMetadata newTable = table.withSwapped(table.indexes.without(indexName)); |
| return schema.withAddedOrUpdated(keyspace.withSwapped(keyspace.tables.withSwapped(newTable))); |
| } |
| |
| SchemaChange schemaChangeEvent(KeyspacesDiff diff) |
| { |
| assert diff.altered.size() == 1; |
| KeyspaceDiff ksDiff = diff.altered.get(0); |
| |
| assert ksDiff.tables.altered.size() == 1; |
| Diff.Altered<TableMetadata> tableDiff = ksDiff.tables.altered.iterator().next(); |
| |
| return new SchemaChange(Change.UPDATED, Target.TABLE, keyspaceName, tableDiff.after.name); |
| } |
| |
| public void authorize(ClientState client) |
| { |
| KeyspaceMetadata keyspace = Schema.instance.getKeyspaceMetadata(keyspaceName); |
| if (null == keyspace) |
| return; |
| |
| keyspace.findIndexedTable(indexName) |
| .ifPresent(t -> client.ensureTablePermission(keyspaceName, t.name, Permission.ALTER)); |
| } |
| |
| @Override |
| public AuditLogContext getAuditLogContext() |
| { |
| return new AuditLogContext(AuditLogEntryType.DROP_INDEX, keyspaceName, indexName); |
| } |
| |
| public String toString() |
| { |
| return String.format("%s (%s, %s)", getClass().getSimpleName(), keyspaceName, indexName); |
| } |
| |
| public static final class Raw extends CQLStatement.Raw |
| { |
| private final QualifiedName name; |
| private final boolean ifExists; |
| |
| public Raw(QualifiedName name, boolean ifExists) |
| { |
| this.name = name; |
| this.ifExists = ifExists; |
| } |
| |
| public DropIndexStatement prepare(ClientState state) |
| { |
| String keyspaceName = name.hasKeyspace() ? name.getKeyspace() : state.getKeyspace(); |
| return new DropIndexStatement(keyspaceName, name.getName(), ifExists); |
| } |
| } |
| } |