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Subject [GitHub] twdsilva commented on a change in pull request #428: PHOENIX-374: Enable access to dynamic columns in * or cf.* selection
Date Wed, 23 Jan 2019 23:12:29 GMT
twdsilva commented on a change in pull request #428: PHOENIX-374: Enable access to dynamic
columns in * or cf.* selection
URL: https://github.com/apache/phoenix/pull/428#discussion_r250333825
 
 

 ##########
 File path: phoenix-core/src/main/java/org/apache/phoenix/coprocessor/DynamicColumnWildcard.java
 ##########
 @@ -0,0 +1,141 @@
+/*
+ * 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.phoenix.coprocessor;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.hbase.Cell;
+import org.apache.hadoop.hbase.client.Mutation;
+import org.apache.hadoop.hbase.client.Put;
+import org.apache.hadoop.hbase.coprocessor.ObserverContext;
+import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor;
+import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
+import org.apache.hadoop.hbase.coprocessor.RegionObserver;
+import org.apache.hadoop.hbase.regionserver.MiniBatchOperationInProgress;
+import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.phoenix.coprocessor.generated.DynamicColumnMetaDataProtos;
+import org.apache.phoenix.coprocessor.generated.PTableProtos;
+import org.apache.phoenix.schema.PColumn;
+import org.apache.phoenix.schema.PColumnImpl;
+import org.apache.phoenix.util.ServerUtil;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.NavigableMap;
+import java.util.Optional;
+
+/**
+ * Coprocessor for exposing dynamic columns in wildcard queries. This coprocessor will be
registered
+ * to physical HBase tables only i.e. PTableType.TABLE and is driven by the client-side config
+ * QueryServices.WILDCARD_QUERY_DYNAMIC_COLS_ATTRIB
+ * See PHOENIX-374
+ */
+public class DynamicColumnWildcard implements RegionObserver, RegionCoprocessor {
 
 Review comment:
   Can you just use ScanRegionObserver instead of creating a new coprocessor?

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