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[HIVE-2519] Dynamic partition insert should enforce the order of the partition spec is the same as the one in schema - Hive - [issue]
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...Suppose the table schema is (a string, b string) partitioned by (p1 string, p2 string), a dynamic partition insert is allowed to:insert overwrite ... partition (p2="...", p1);which will crea...
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http://issues.apache.org/jira/browse/HIVE-2519
Author: Ning Zhang,
2011-12-16, 23:56
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[HIVE-1343] add an interface in RCFile to support concatenation of two files without (de)compression - Hive - [issue]
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...If two files are concatenated, we need to read each record in these files and write them back to the destination file. The IO cost is mostly unavoidable due to the lack of append functionali...
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http://issues.apache.org/jira/browse/HIVE-1343
Author: Ning Zhang,
2011-12-16, 23:56
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[HIVE-1980] Merging using mapreduce rather than map-only job failed in case of dynamic partition inserts - Hive - [issue]
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...In dynamic partition insert and if merge is set to true and hive.mergejob.maponly=false, the merge MapReduce job will fail....
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http://issues.apache.org/jira/browse/HIVE-1980
Author: Ning Zhang,
2011-12-16, 23:56
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[HIVE-2556] upgrade script 008-HIVE-2246.mysql.sql contains syntax errors - Hive - [issue]
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...source <script_name> gives syntax errors....
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http://issues.apache.org/jira/browse/HIVE-2556
Author: Ning Zhang,
2011-12-16, 23:56
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[HIVE-2028] Performance instruments for client side execution - Hive - [issue]
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...Hive client side execution could sometimes takes a long time. This task is to instrument the client side code to measure the time spent in the most likely expensive components....
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http://issues.apache.org/jira/browse/HIVE-2028
Author: Ning Zhang,
2011-12-16, 23:56
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[HIVE-2082] Reduce memory consumption in preparing MapReduce job - Hive - [issue]
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...Hive client side consume a lot of memory when the number of input partitions is large. One reason is that each partition maintains a list of FieldSchema which are intended to deal with schem...
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http://issues.apache.org/jira/browse/HIVE-2082
Author: Ning Zhang,
2011-12-16, 23:56
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[HIVE-2000] adding comments to Hive Stats JDBC queries - Hive - [issue]
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...Stats gathering could issue a large number of JDBC queries to stats publisher and aggregator. In a shared DB environment, it's hard to tell which SQL statements are contributed by Hive stats...
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http://issues.apache.org/jira/browse/HIVE-2000
Author: Ning Zhang,
2011-12-16, 23:56
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[HIVE-1310] Partitioning columns should be of primitive types only - Hive - [issue]
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...If the user specify the partitioning column as complex type (e.g., array, map) we should throw an error in semantic analyzer....
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http://issues.apache.org/jira/browse/HIVE-1310
Author: Ning Zhang,
2011-12-16, 23:56
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[HIVE-2037] Merge result file size should honor hive.merge.size.per.task - Hive - [issue]
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...The merge job set mapred.min.split.size to the value of hive.merge.size.per.task, which roughly equals to the output file size. However the input split size is also determined by mapred.min....
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http://issues.apache.org/jira/browse/HIVE-2037
Author: Ning Zhang,
2011-12-16, 23:56
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[HIVE-2127] Improve stats gathering reliability by retries on failures with hive.stats.retries.max and hive.stats.retries.wait - Hive - [issue]
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...Stats publishing and aggregation only try once and if there is any exception it will fail and return. If many mappers/reducers updating stats at the same time, it is very common to get lock ...
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http://issues.apache.org/jira/browse/HIVE-2127
Author: Ning Zhang,
2011-12-16, 23:56
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