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https://issues.apache.org/jira/browse/SENTRY-2210?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16576736#comment-16576736
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Arjun Mishra edited comment on SENTRY-2210 at 8/10/18 7:03 PM:
---------------------------------------------------------------
Its the same with Derby too. Derby adds index by default. On adding a new index
we only get a warning message. See below
{noformat}
CREATE INDEX AUTHZ_PATH_FK_IDX ON AUTHZ_PATH (AUTHZ_OBJ_ID);
0 rows inserted/updated/deleted
WARNING 01504: 'AUTHZ_PATH_FK_IDX' index not created because it is a duplicate
of an existing index: 'SQL180810140032310'.
{noformat}
was (Author: arjunmishra13):
Its the same with Derby too. Derby adds index by default. See below
{noformat}
CREATE INDEX AUTHZ_PATH_FK_IDX ON AUTHZ_PATH (AUTHZ_OBJ_ID);
0 rows inserted/updated/deleted
WARNING 01504: 'AUTHZ_PATH_FK_IDX' index not created because it is a duplicate
of an existing index: 'SQL180810140032310'.
{noformat}
> AUTHZ_PATH should have index on the foreign key AUTHZ_OBJ_ID
> ------------------------------------------------------------
>
> Key: SENTRY-2210
> URL: https://issues.apache.org/jira/browse/SENTRY-2210
> Project: Sentry
> Issue Type: Improvement
> Components: Sentry
> Affects Versions: 2.1.0
> Reporter: Na Li
> Assignee: Na Li
> Priority: Major
> Attachments: SENTRY-2210.001.patch, SENTRY-2210.002.patch,
> SENTRY-2210.003.patch, SENTRY-2210.004.patch
>
>
> AUTHZ_PATH does not have index on the foreign key AUTHZ_OBJ_ID. When the
> number of entries become really large, a command like "select * from
> AUTHZ_PATH where AUTHZ_OBJ_ID = 8311512" becomes very slow because it results
> in table scan.
> To improve performance, we should add index for its foreign key in table
> AUTHZ_PATH.
> The sql script to do this in Oracle is "CREATE INDEX AUTHZ_PATH_FK_IDX on
> AUTHZ_PATH(AUTHZ_OBJ_ID);"
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