Hyunsik Choi created TAJO-1991:
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Summary: Tablespace::getVolume should take filter predication
Key: TAJO-1991
URL: https://issues.apache.org/jira/browse/TAJO-1991
Project: Tajo
Issue Type: Improvement
Components: Storage
Reporter: Hyunsik Choi
Assignee: Hyunsik Choi
Fix For: 0.12.0, 0.11.1
{{Tablespace::getVolume}} plays a role to guess or compute exactly the table
volume. This volume result is usually used for join optimization. But,
currently {{Tablespace::getVolume}} just returns whole table volume. It may
cause sub optimal join order, especially in partitioned tables or indexable
tables like HBase.
The main objective of this patch is to improve {{getVolume}} method to take
filter predicates and return more reasonable volume sizes according to
predicates.
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