[jira] [Updated] (HIVE-13076) Implement FK/PK "rely novalidate" constraints for better CBO
[ https://issues.apache.org/jira/browse/HIVE-13076?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Jesus Camacho Rodriguez updated HIVE-13076: --- Fix Version/s: (was: 2.1.0) > Implement FK/PK "rely novalidate" constraints for better CBO > > > Key: HIVE-13076 > URL: https://issues.apache.org/jira/browse/HIVE-13076 > Project: Hive > Issue Type: Improvement > Components: CBO, Logical Optimizer >Reporter: Ruslan Dautkhanov >Assignee: Hari Sankar Sivarama Subramaniyan > Attachments: AddingPKFKconstraints.pdf > > > Oracle has "RELY NOVALIDATE" option for constraints.. Could be easier for > Hive to start with something like that for PK/FK constraints. So CBO has more > information for optimizations. It does not have to actually check if that > constraint is relationship is true; it can just "rely" on that constraint.. > https://docs.oracle.com/database/121/SQLRF/clauses002.htm#sthref2289 > So it would be helpful with join cardinality estimates, and with cases like > this - https://issues.apache.org/jira/browse/HIVE-13019 -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (HIVE-13076) Implement FK/PK "rely novalidate" constraints for better CBO
[ https://issues.apache.org/jira/browse/HIVE-13076?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Hari Sankar Sivarama Subramaniyan updated HIVE-13076: - Attachment: AddingPKFKconstraints.pdf > Implement FK/PK "rely novalidate" constraints for better CBO > > > Key: HIVE-13076 > URL: https://issues.apache.org/jira/browse/HIVE-13076 > Project: Hive > Issue Type: Improvement > Components: CBO, Logical Optimizer >Reporter: Ruslan Dautkhanov >Assignee: Hari Sankar Sivarama Subramaniyan > Fix For: 2.1.0 > > Attachments: AddingPKFKconstraints.pdf > > > Oracle has "RELY NOVALIDATE" option for constraints.. Could be easier for > Hive to start with something like that for PK/FK constraints. So CBO has more > information for optimizations. It does not have to actually check if that > constraint is relationship is true; it can just "rely" on that constraint.. > https://docs.oracle.com/database/121/SQLRF/clauses002.htm#sthref2289 > So it would be helpful with join cardinality estimates, and with cases like > this - https://issues.apache.org/jira/browse/HIVE-13019 -- This message was sent by Atlassian JIRA (v6.3.4#6332)
