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https://issues.apache.org/jira/browse/CARBONDATA-80?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15401919#comment-15401919
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ASF GitHub Bot commented on CARBONDATA-80:
------------------------------------------
Github user kumarvishal09 commented on a diff in the pull request:
https://github.com/apache/incubator-carbondata/pull/44#discussion_r72965892
--- Diff:
core/src/main/java/org/carbondata/core/cache/dictionary/ColumnDictionaryChunkWrapper.java
---
@@ -0,0 +1,124 @@
+/*
+ * 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.carbondata.core.cache.dictionary;
+
+import java.nio.ByteBuffer;
+import java.util.Iterator;
+import java.util.List;
+
+import org.carbondata.format.ColumnDictionaryChunk;
+
+/**
+ * This class is a wrapper over column dictionary chunk thrift object.
+ * The wrapper class wraps the list<ColumnDictionaryChunk> and provides an
API
+ * to fill the byte array into list
+ */
+public class ColumnDictionaryChunkWrapper implements Iterator<byte[]> {
--- End diff --
Please extend carbonIterator class as here we are not supporting remove
operation
> Dictionary values should be equally distributed in buckets while loading in
> memory
> ----------------------------------------------------------------------------------
>
> Key: CARBONDATA-80
> URL: https://issues.apache.org/jira/browse/CARBONDATA-80
> Project: CarbonData
> Issue Type: Improvement
> Reporter: Manish Gupta
> Assignee: Manish Gupta
> Priority: Minor
>
> Whenever a query is executed, dictionary for columns queried is loaded in
> memory. For incremental loads dictionary values are loaded incrementally and
> thus one list contains several sub lists with dictionary values.
> The dictionary values on incremental load may not be equally distributed in
> the sub buckets and this might increase the search time of a value if there
> are too many incremental loads.
> Therefore the dictionary values should be divided equally in the sub buckets.
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