Xuefu Zhang created HIVE-5872:
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Summary: Make UDAFs such as GenericUDAFSum report accurate
precision/scale for decimal types
Key: HIVE-5872
URL: https://issues.apache.org/jira/browse/HIVE-5872
Project: Hive
Issue Type: Improvement
Components: Types, UDF
Affects Versions: 0.12.0
Reporter: Xuefu Zhang
Assignee: Xuefu Zhang
Currently UDAFs are still reporting system default precision/scale (38, 18) for
decimal results. Not only this is coarse, but also this can cause problems in
subsequent operators such as division, where the result is dependent on the
precision/scale of the input, which can go out of bound (38,38). Thus, these
UDAFs should correctly report the precision/scale of the result.
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