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ASF GitHub Bot commented on PHOENIX-3534: ----------------------------------------- Github user JamesRTaylor commented on a diff in the pull request: https://github.com/apache/phoenix/pull/303#discussion_r192308674 --- Diff: phoenix-core/src/test/java/org/apache/phoenix/coprocessor/MetaDataEndpointImplTest.java --- @@ -0,0 +1,299 @@ +package org.apache.phoenix.coprocessor; + +import static org.junit.Assert.assertEquals; +import static org.junit.Assert.assertNotNull; +import static org.junit.Assert.fail; + +import java.io.IOException; +import java.sql.Connection; +import java.sql.DriverManager; +import java.sql.SQLException; +import java.util.Arrays; +import java.util.List; +import java.util.Map; + +import org.apache.hadoop.hbase.HConstants; +import org.apache.hadoop.hbase.TableName; +import org.apache.hadoop.hbase.client.HTable; +import org.apache.phoenix.end2end.ParallelStatsDisabledIT; +import org.apache.phoenix.exception.SQLExceptionCode; +import org.apache.phoenix.jdbc.PhoenixDatabaseMetaData; +import org.apache.phoenix.schema.PColumn; +import org.apache.phoenix.schema.PTable; +import org.apache.phoenix.schema.TableNotFoundException; +import org.apache.phoenix.util.PhoenixRuntime; +import org.junit.Test; + +import com.google.common.base.Joiner; +import com.google.common.collect.ImmutableMap; +import com.google.common.collect.Lists; +import com.google.common.collect.Maps; + +/** + * 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. + */ +public class MetaDataEndpointImplTest extends ParallelStatsDisabledIT { --- End diff -- I think we should keep the OrphanCleaner code. The idea is that failed deletions of metadata are transparent. They shouldn't block creation of new tables. We should also cleanup on compaction. > Support multi region SYSTEM.CATALOG table > ----------------------------------------- > > Key: PHOENIX-3534 > URL: https://issues.apache.org/jira/browse/PHOENIX-3534 > Project: Phoenix > Issue Type: Bug > Reporter: James Taylor > Assignee: Thomas D'Silva > Priority: Major > Attachments: PHOENIX-3534-wip.patch > > > Currently Phoenix requires that the SYSTEM.CATALOG table is single region > based on the server-side row locks being held for operations that impact a > table and all of it's views. For example, adding/removing a column from a > base table pushes this change to all views. > As an alternative to making the SYSTEM.CATALOG transactional (PHOENIX-2431), > when a new table is created we can do a lazy cleanup of any rows that may be > left over from a failed DDL call (kudos to [~lhofhansl] for coming up with > this idea). To implement this efficiently, we'd need to also do PHOENIX-2051 > so that we can efficiently find derived views. > The implementation would rely on an optimistic concurrency model based on > checking our sequence numbers for each table/view before/after updating. Each > table/view row would be individually locked for their change (metadata for a > view or table cannot span regions due to our split policy), with the sequence > number being incremented under lock and then returned to the client. -- This message was sent by Atlassian JIRA (v7.6.3#76005)