[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Fix Version/s: 3.0.0 > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg >Priority: Major > Fix For: 3.0.0 > > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch, > HIVE-17767.3.patch, HIVE-17767.4.patch, HIVE-17767.5.patch, > HIVE-17767.6.patch, HIVE-17767.7.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v7.6.3#76005)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Resolution: Fixed Status: Resolved (was: Patch Available) Pushed it to master. Thanks for reviewing [~ashutoshc] > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch, > HIVE-17767.3.patch, HIVE-17767.4.patch, HIVE-17767.5.patch, > HIVE-17767.6.patch, HIVE-17767.7.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Status: Patch Available (was: Open) > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch, > HIVE-17767.3.patch, HIVE-17767.4.patch, HIVE-17767.5.patch, > HIVE-17767.6.patch, HIVE-17767.7.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Attachment: HIVE-17767.7.patch > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch, > HIVE-17767.3.patch, HIVE-17767.4.patch, HIVE-17767.5.patch, > HIVE-17767.6.patch, HIVE-17767.7.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Status: Open (was: Patch Available) > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch, > HIVE-17767.3.patch, HIVE-17767.4.patch, HIVE-17767.5.patch, HIVE-17767.6.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Status: Patch Available (was: Open) > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch, > HIVE-17767.3.patch, HIVE-17767.4.patch, HIVE-17767.5.patch, HIVE-17767.6.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Attachment: HIVE-17767.6.patch > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch, > HIVE-17767.3.patch, HIVE-17767.4.patch, HIVE-17767.5.patch, HIVE-17767.6.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Status: Open (was: Patch Available) > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch, > HIVE-17767.3.patch, HIVE-17767.4.patch, HIVE-17767.5.patch, HIVE-17767.6.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Attachment: HIVE-17767.5.patch > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch, > HIVE-17767.3.patch, HIVE-17767.4.patch, HIVE-17767.5.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Status: Patch Available (was: Open) > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch, > HIVE-17767.3.patch, HIVE-17767.4.patch, HIVE-17767.5.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Status: Open (was: Patch Available) > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch, > HIVE-17767.3.patch, HIVE-17767.4.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Attachment: HIVE-17767.4.patch > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg >Priority: Major > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch, > HIVE-17767.3.patch, HIVE-17767.4.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Status: Patch Available (was: Open) > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg >Priority: Major > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch, > HIVE-17767.3.patch, HIVE-17767.4.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Status: Open (was: Patch Available) > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg >Priority: Major > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch, > HIVE-17767.3.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Attachment: HIVE-17767.3.patch > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg >Priority: Major > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch, > HIVE-17767.3.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Status: Patch Available (was: Open) > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg >Priority: Major > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch, > HIVE-17767.3.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Status: Open (was: Patch Available) > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg >Priority: Major > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch, > HIVE-17767.3.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Status: Patch Available (was: Open) > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg >Priority: Major > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Status: Open (was: Patch Available) > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg >Priority: Major > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Attachment: HIVE-17767.2.patch > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg >Priority: Major > Attachments: HIVE-17767.1.patch, HIVE-17767.2.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Status: Patch Available (was: Open) > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg > Attachments: HIVE-17767.1.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (HIVE-17767) Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN
[ https://issues.apache.org/jira/browse/HIVE-17767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-17767: --- Attachment: HIVE-17767.1.patch First patch removes earlier commit (which reverted another commit) and adds a rewrite of correlated EXISTS/IN into LEFT SEMI JOIN. This patch isn't yet ready to be committed since HIVE-17766 isn't in yet. > Rewrite correlated EXISTS/IN subqueries into LEFT SEMI JOIN > --- > > Key: HIVE-17767 > URL: https://issues.apache.org/jira/browse/HIVE-17767 > Project: Hive > Issue Type: Improvement > Components: Query Planning >Reporter: Vineet Garg >Assignee: Vineet Garg > Attachments: HIVE-17767.1.patch > > > Currently such queries are written into group by + inner join with value > generator and is inefficient. Value generator consists of join with outer > query to fetch all correlated values. This value generator could be > completely eliminated if such queries are instead rewritten into LEFT SEMI > JOIN. > Note that to do this first hive need to support LEFT SEMI JOIN with non-equi > condition (HIVE-17766). -- This message was sent by Atlassian JIRA (v6.4.14#64029)
