Sushanth Sowmyan created HIVE-4816:
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Summary: Followup from HIVE-4551 : Reworking HCat Record
Transformation
Key: HIVE-4816
URL: https://issues.apache.org/jira/browse/HIVE-4816
Project: Hive
Issue Type: Improvement
Reporter: Sushanth Sowmyan
Assignee: Sushanth Sowmyan
This is a post-bug followup from HIVE-4551, to refactor some HCatalog code to
be cleaner/neater. Reposting contents from my previous jira, this jira needs to
track the following:
a) HCatRecord and HCatSchema reflect underlying raw data and do no promotions.
b) Introduce a ConversionImpl, which defines various datatype conversion
functions, which all default to returning the input, and having a config that
allows a user which conversions are implemented.
c) Introduce a PromotedHCatRecord & PromotedHCatSchema that wrap
HCatRecord/HCatSchema and use a ConversionImpl.
d) Implement a PigLoaderConversionImpl/PigStorerConversionImpl in
hcat-pig-adapter, which implements the following: Short->Int promotion,
Short->Int promotion, Boolean->Int promotion
e) Have HCatLoader/HCatStorer use the promoted versions of
HCatRecord/HCatSchema which use the PigConversionImpl.
f) Remove the current HCatContext promotion parameters and make them be
HCatLoader/HCatStorer parameters.
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