Eugene Koifman created HIVE-16722:
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Summary: Converting non-acid table to acid should perform
validation
Key: HIVE-16722
URL: https://issues.apache.org/jira/browse/HIVE-16722
Project: Hive
Issue Type: Sub-task
Affects Versions: 1.0.0
Reporter: Eugene Koifman
Converting a non acid table to acid only performs metadata validation (in
_TransactionalValidationListener_).
The data read code path only understands certain directory layouts and file
names and ignores (generally) files that don't match the expected format.
In Hive, directory layout and bucket file naming (especially older releases) is
poorly enforced.
Need to add a validation step on
{noformat}
alter table T SET TBLPROPERTIES ('transactional'='true')
{noformat}
to
scan the file system and report any possible data loss scenarios.
Currently Acid understands bucket files name like "00000_0" and (with
HIVE-16177) 00000_0_copy1" etc at the root of the partition.
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