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[HIVE-21646] Tez: Prevent TezTasks from escaping thread logging context -
Hive - [issue]
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| ...If hive.exec.parallel is set to true to parallelize MoveTasks or StatsTasks, the Tez task does not benefit from a new thread and will lose all the thread context of the current query.Multipl... |
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[HIVE-21768] JDBC: Strip the default union prefix for un-enclosed UNION queries -
Hive - [issue]
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| ...beeline> select 1 union all select 2;+----------+| _u1._c0 |+----------+| 2 || 1 |+----------+The _u1 is superfluous and ... |
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[HIVE-21225] ACID: getAcidState() should cache a recursive dir listing locally -
Hive - [issue]
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| ...Currently getAcidState() makes 3 calls into the FS api which could be answered by making a single recursive listDir call and reusing the same data to check for isRawFormat() and isValidBase(... |
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[HIVE-21742] Vectorization: CASE result type casting -
Hive - [issue]
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| ...create temporary table foo(q548284 int);insert into foo values(1),(2),(3),(4),(5),(6);select q548284, CASE WHEN ((q548284 = 1)) THEN (0.2) WHEN ((q548284 = 2)) THEN (0.4) WHEN ((q548284 = 3)... |
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[ORC-500] PPD: StripeStatistics::getColumnStatistics() does not column prune -
Orc - [issue]
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| ...StripeStatistics::getColumnStatistics() will deserialize all column statistics, even if the ORC predicate push-down and the eventual SARG applies to a subset.This is affecting DATE push-down... |
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[HIVE-10915] ORC fails to read table with a 38Gb ORC file -
Hive - [issue]
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| ...hive> set mapreduce.input.fileinputformat.split.maxsize=1000000000000;hive> set mapreduce.input.fileinputformat.split.maxsize=1000000000000;hive> alter table lineitem co... |
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[HIVE-21344] CBO: Reduce compilation time in presence of materialized views -
Hive - [issue]
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| ...For every query, getAllValidMaterializedViews still requires a call to metastore to verify that the materializations exist, whether they are outdated or not, etc. Since this is only useful f... |
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[HIVE-21687] LLAP: LlapBaseInputFormat.getSplits(..., 0) should use LIMIT 0 query -
Hive - [issue]
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| ...The 0 split query is useful in ensuring that the user has access to the tables and getting the result schema.There's a fast-path for Tableau for "LIMIT 0" queries which can be used for this ... |
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[HIVE-18874] JDBC: HiveConnection shades log4j interfaces -
Hive - [issue]
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| ...This prevents Hive JDBC from being instantiated into a regular SLF4J logger env.java.lang.IncompatibleClassChangeError: Class org.apache.logging.slf4j.Log4jLoggerFactory does not implement t... |
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[HIVE-21400] Vectorization: LazyBinarySerializeWrite allocates Field() within the loop -
Hive - [issue]
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| ...GC thrash from an unexpected source in ReduceSinkOperator.org.apache.hadoop.hive.serde2.lazybinary.fast.LazyBinarySerializeWrite.resetWithoutOutput(LazyBinarySerializeWrite.java:136) &... |
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