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[HIVE-5986] ORC SARG evaluation fails with NPE for UDFs or expressions in predicate condition - Hive - [issue]
...select s from orctable where length(substr(s, 1, 2)) <= 2 and s like '%'; kind of queries generate empty child expressions for the operator (AND in this case). When child expressions...
http://issues.apache.org/jira/browse/HIVE-5986    Author: Prasanth J, 2014-02-27, 22:31
[HIVE-5994] ORC RLEv2 encodes wrongly for large negative BIGINTs  (64 bits ) - Hive - [issue]
...For large negative BIGINTs, zigzag encoding will yield large value (64bit value) with MSB set to 1. This value is interpreted as negative value in SerializationUtils.findClosestNumBits(long ...
http://issues.apache.org/jira/browse/HIVE-5994    Author: Prasanth J, 2014-02-20, 11:51
[HIVE-6326] Split generation in ORC may generate wrong split boundaries because of unaccounted padded bytes - Hive - [issue]
...HIVE-5091 added padding to ORC files to avoid ORC stripes straddling HDFS blocks. The length of this padded bytes are not stored in stripe information. OrcInputFormat.getSplits() uses stripe...
http://issues.apache.org/jira/browse/HIVE-6326    Author: Prasanth J, 2014-02-19, 22:25
[HIVE-6002] Create new ORC write version to address the changes to RLEv2 - Hive - [issue]
...HIVE-5994 encodes large negative big integers wrongly. This results in loss of original data that is being written using orc write version 0.12. Bump up the version number to differentiate t...
http://issues.apache.org/jira/browse/HIVE-6002    Author: Prasanth J, 2014-02-03, 23:04
[HIVE-5898] Make fetching of column statistics configurable - Hive - [issue]
...This is a subtask of HIVE-5369. Current metastore api for fetching column statistics can only be done for per partition and per column basis. This will impact the performance of statistics a...
http://issues.apache.org/jira/browse/HIVE-5898    Author: Prasanth J, 2014-01-26, 00:48
[HIVE-5921] Better heuristics for worst case statistics estimates for join, limit and filter operator - Hive - [issue]
...This is a subtask of HIVE-5369. In worst case (i.e; absence of column statistics) HIVE-5849 improved the basic statistics with heuristics. But the heuristics failed to provide better estimat...
http://issues.apache.org/jira/browse/HIVE-5921    Author: Prasanth J, 2014-01-26, 00:48
[HIVE-5369] Annotate hive operator tree with statistics from metastore - Hive - [issue]
...Currently the statistics gathered at table/partition level and column level are not used during query planning stage. Statistics at table/partition and column level can be used for optimizin...
http://issues.apache.org/jira/browse/HIVE-5369    Author: Prasanth J, 2014-01-26, 00:48
[HIVE-6284] batchSize computation in Vectorize ORC reader can cause BufferUnderFlowException when PPD is enabled - Hive - [issue]
...nextBatch() method that computes the batchSize is only aware of stripe boundaries. This will not work when PPD in ORC is enabled as PPD works at row group level (stripe contains multiple row...
http://issues.apache.org/jira/browse/HIVE-6284    Author: Prasanth J, 2014-01-24, 02:40
[HIVE-6283] batchSize computation in Vectorize ORC reader can cause BufferUnderFlowException when PPD is enabled - Hive - [issue]
...nextBatch() method that computes the batchSize is only aware of stripe boundaries. This will not work when PPD in ORC is enabled as PPD works at row group level (stripe contains multiple row...
http://issues.apache.org/jira/browse/HIVE-6283    Author: Prasanth J, 2014-01-24, 02:39
[HIVE-6282] batchSize computation in Vectorize ORC reader can cause BufferUnderFlowException when PPD is enabled - Hive - [issue]
...nextBatch() method that computes the batchSize is only aware of stripe boundaries. This will not work when PPD in ORC is enabled as PPD works at row group level (stripe contains multiple row...
http://issues.apache.org/jira/browse/HIVE-6282    Author: Prasanth J, 2014-01-24, 02:39
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