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https://reviews.apache.org/r/66548/
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Review request for Sqoop.
Bugs: SQOOP-3311
https://issues.apache.org/jira/browse/SQOOP-3311
Repository: sqoop-trunk
Description
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Hive 3 will introduce a switch (HIVE-18294) to create eligible tables as ACID
by default. This will probably result in increased usage of ACID tables and the
need to support importing into ACID tables with Sqoop.
Currently the only table format supporting full ACID tables is ORC.
The easiest and most effective way to support importing into these tables would
be to write out files as ORC and keep using LOAD DATA as we do for all other
Hive tables (supported since HIVE-17361).
Workaround could be to create table as textfile (as before) and then CTAS from
that. This would push the responsibility of creating ORC format to Hive.
However it would result in writing every record twice; in text format and in
ORC.
Note that ORC is only necessary for full ACID tables. Insert-only (aka.
micromanaged) ACID tables can use arbitrary file format.
Supporting full ACID tables would also be the first step in making
"lastmodified" incremental imports work with Hive.
Diffs
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ivy.xml 6be4fa2
ivy/libraries.properties c44b50b
src/java/org/apache/sqoop/SqoopOptions.java 651cebd
src/java/org/apache/sqoop/hive/TableDefWriter.java b7a25b7
src/java/org/apache/sqoop/mapreduce/DataDrivenImportJob.java a5962ba
src/java/org/apache/sqoop/mapreduce/OrcImportMapper.java PRE-CREATION
src/java/org/apache/sqoop/tool/BaseSqoopTool.java b02e4fe
src/java/org/apache/sqoop/tool/ExportTool.java 060f2c0
src/java/org/apache/sqoop/tool/ImportTool.java e992005
src/java/org/apache/sqoop/util/OrcUtil.java PRE-CREATION
src/test/org/apache/sqoop/TestOrcImport.java PRE-CREATION
src/test/org/apache/sqoop/hive/TestTableDefWriter.java 8bdc3be
src/test/org/apache/sqoop/orm/TestClassWriter.java 0cc07cf
src/test/org/apache/sqoop/util/TestOrcUtil.java PRE-CREATION
Diff: https://reviews.apache.org/r/66548/diff/1/
Testing
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- added some unit tests
- tested basic Hive import scenarios on a cluster
Thanks,
daniel voros
