Peter Ebert created IMPALA-5311:
-----------------------------------
Summary: Select count(*) queries show in incorrect compression in
profile
Key: IMPALA-5311
URL: https://issues.apache.org/jira/browse/IMPALA-5311
Project: IMPALA
Issue Type: Bug
Reporter: Peter Ebert
Priority: Minor
Fix For: Impala 2.9.0
If you run a count(*) query you will see the following in the profile:
File Formats: PARQUET/NONE:1
if you then run a select * you will see the correct compression format:
File Formats: PARQUET/SNAPPY:14
If the correct compression cannot be inferred without reading the data
(presuming this happens because Impala just reads the parquet stats) might be
better to put nothing at all instead of none. Ideally though SNAPPY would
display even on count(*).
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
