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Posted to dev@phoenix.apache.org by "Pedro Gandola (JIRA)" <ji...@apache.org> on 2016/01/14 18:33:39 UTC

[jira] [Created] (PHOENIX-2597) Local Indexes are not used to query views

Pedro Gandola created PHOENIX-2597:
--------------------------------------

             Summary: Local Indexes are not used to query views
                 Key: PHOENIX-2597
                 URL: https://issues.apache.org/jira/browse/PHOENIX-2597
             Project: Phoenix
          Issue Type: Bug
    Affects Versions: 4.4.0, 4.7.0
            Reporter: Pedro Gandola


I've noticed that Phoenix (using version 4.4) when querying a view it does not consider the original table local indexes to optimise the query.

If I explain my query over the original table it's using the local index properly:

{code:sql}
EXPLAIN SELECT * FROM BIDDING_EVENTS WHERE wTs IS NOT NULL;
CLIENT 300-CHUNK PARALLEL 300-WAY RANGE SCAN OVER _LOCAL_IDX_BIDDING_EVENTS [-32768]
     SERVER FILTER BY "WTS" IS NOT NULL
{code}

However, If I create a view using the exact same query and explain I get a full scan.

{code:sql}
CREATE VIEW WINS_VIEW AS SELECT * FROM BIDDING_EVENTS WHERE wTs IS NOT NULL; 
EXPLAIN SELECT * FROM WINS_VIEW;
CLIENT 300-CHUNK PARALLEL 1-WAY FULL SCAN OVER BIDDING_EVENTS
     SERVER FILTER BY WTS IS NOT NULL
{code}

Version 4.7 is affected as well.



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