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[HIVE-4324] ORC Turn off dictionary encoding when number of distinct keys is greater than threshold - Hive - [issue]
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...Add a configurable threshold so that if the number of distinct values in a string column is greater than that fraction of non-null values, dictionary encoding is turned off....
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http://issues.apache.org/jira/browse/HIVE-4324
Author: Kevin Wilfong,
2013-05-18, 00:35
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[HIVE-4340] ORC should provide raw data size - Hive - [issue]
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...ORC's SerDe currently does nothing, and hence does not calculate a raw data size. WriterImpl, however, has enough information to provide one.WriterImpl should compute a raw data size f...
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http://issues.apache.org/jira/browse/HIVE-4340
Author: Kevin Wilfong,
2013-05-17, 17:41
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[HIVE-4312] Make ORC SerDe support replace columns - Hive - [issue]
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...In the alterTable method of DDLTask.java there is an explicit list of SerDes which support the replace columns command. ORC should support this, at least for partitioned tables, maybe ...
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http://issues.apache.org/jira/browse/HIVE-4312
Author: Kevin Wilfong,
2013-05-17, 17:41
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[HIVE-3898] getReducersBucketing in SemanticAnalyzer may return more than the max number of reducers - Hive - [issue]
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...getReducersBucketing rounds totalFiles / maxReducers down, when it should be rounded up to the nearest integer.E.g. if totalFiles = 60 and maxReducers = 21, totalFiles / maxReducers = 2total...
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http://issues.apache.org/jira/browse/HIVE-3898
Author: Kevin Wilfong,
2013-05-16, 22:11
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[HIVE-4178] ORC fails with files with different numbers of columns - Hive - [issue]
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...When CombineHiveInputFormat is used, it's possible that two files with different numbers of files can be included in the same split, in which case Hive will fail at one of several points wit...
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http://issues.apache.org/jira/browse/HIVE-4178
Author: Kevin Wilfong,
2013-05-16, 22:11
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[HIVE-3393] get_json_object and json_tuple should use Jackson library - Hive - [issue]
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...The Jackson library's JSON parsers have been shown to be significantly faster that json.org's. The library is already included, so I can't think of a reason not to use it.There's also ...
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http://issues.apache.org/jira/browse/HIVE-3393
Author: Kevin Wilfong,
2013-05-15, 09:22
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[HIVE-2901] Hive union with NULL constant and string in same column returns all null - Hive - [issue]
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...select x from (select value as x from src union all select NULL as x from src)a;This query produces all nulls, where value is a string column.Notably, select x from (select key as x from src...
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http://issues.apache.org/jira/browse/HIVE-2901
Author: Kevin Wilfong,
2013-05-14, 09:07
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[HIVE-3467] BucketMapJoinOptimizer should optimize joins on partition columns - Hive - [issue]
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...Consider the query:SELECT * FROM t1 JOIN t2 on t1.part = t2.part and t1.key = t2.key;Where t1 and t2 are partitioned by part and bucketed by key.Suppose part take values 1 and 2 and t1 and t...
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http://issues.apache.org/jira/browse/HIVE-3467
Author: Kevin Wilfong,
2013-05-06, 19:17
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[HIVE-4430] Semantic analysis fails in presence of certain literals in on clause - Hive - [issue]
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...When users include a bigint literal (a number suffixed with 'L') in the conditions in the on clause the query will fail with, e.g.FAILED: SemanticException 0L encountered with 0 childrenI ha...
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http://issues.apache.org/jira/browse/HIVE-4430
Author: Kevin Wilfong,
2013-05-02, 06:13
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[HIVE-4005] Column truncation - Hive - [issue]
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...Column truncation allows users to remove data for columns that are no longer useful.This is done by removing the data for the column and setting the length of the column data and related len...
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http://issues.apache.org/jira/browse/HIVE-4005
Author: Kevin Wilfong,
2013-04-26, 15:06
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