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  1. Hive
  2. HIVE-13076

Implement FK/PK "rely novalidate" constraints for better CBO

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Details

    • Improvement
    • Status: Resolved
    • Major
    • Resolution: Implemented
    • None
    • None
    • CBO, Logical Optimizer
    • None

    Description

      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

      Attachments

        1. AddingPKFKconstraints.pdf
          153 kB
          Hari Sankar Sivarama Subramaniyan

        Issue Links

          Dependent

          Sub-task - The sub-task of the issue SPARK-17076 Cardinality estimation of join operator

          • Major - Major loss of function.
          • Resolved
          is related to

          New Feature - A new feature of the product, which has yet to be developed. HIVE-6905 Implement Auto increment, primary-foreign Key, not null constraints and default value in Hive Table columns

          • Major - Major loss of function.
          • Open

          New Feature - A new feature of the product, which has yet to be developed. SPARK-15302 Implement FK/PK "rely novalidate" constraints for better CBO

          • Major - Major loss of function.
          • Resolved

          New Feature - A new feature of the product, which has yet to be developed. HIVE-16575 Support for 'UNIQUE' and 'NOT NULL' constraints

          • Major - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. HIVE-13019 Optimizer COLLECT_LIST/COLLECT_SET

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Open

          Improvement - An improvement or enhancement to an existing feature or task. HIVE-15342 Add support for primary/foreign keys in HBase metastore

          • Major - Major loss of function.
          • Resolved
          links to

          Web Link Impala-side feature to implement the same

          Activity

            People

              hsubramaniyan Hari Sankar Sivarama Subramaniyan
              Tagar Ruslan Dautkhanov
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              Dates

                Created:
                Updated:
                Resolved: