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Ran 21 Mar 2019 08:06PM UTC

Files 1033

Run time 1min

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Committed 21 Mar 2019 08:06PM UTC coverage: 79.169% (+0.02%) from 79.154%

Job # 1594.1

Build Type

push

jenkins

Committed by ravipesala

Commit Message

[CARBONDATA-3293] Prune datamaps improvement for count(*)

Problem:
(1) Currently for count (*) , the prune is same as select * query. Blocklet and ExtendedBlocklet are formed from the DataMapRow and that is of no need and it is a time consuming process.
(2) Checking the update/delete status all the time.

Solution:
(1) We have the blocklet row count in the DataMapRow itself, so it is just enough to read the count. With this count (*) query performance can be improved.
(2) No need to check the update/delete status all the time unless the table is not updated/deleted.

This closes #3148

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