Uploaded image for project: 'Hive'
  1. Hive
  2. HIVE-3472

Build An Analytical SQL Engine for MapReduce

    XMLWordPrintableJSON

    Details

    • Type: New Feature
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 0.10.0
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None

      Description

      While there are continuous efforts in extending Hive’s SQL support (e.g., see some recent examples such as HIVE-2005 and HIVE-2810), many widely used SQL constructs are still not supported in HiveQL, such as selecting from multiple tables, subquery in WHERE clauses, etc.

      We propose to build a SQL-92 full compatible engine (for MapReduce based analytical query processing) as an extension to Hive.

      The SQL frontend will co-exist with the HiveQL frontend; consequently, one can mix SQL and HiveQL statements in their queries (switching between HiveQL mode and SQL-92 mode using a “hive.ql.mode” parameter before each query statement). This way useful Hive extensions are still accessible to users.

        Attachments

        1. SQL-design.pdf
          267 kB
          Shane Huang

          Issue Links

            Activity

              People

              • Assignee:
                Unassigned
                Reporter:
                shane.huang Shane Huang
              • Votes:
                3 Vote for this issue
                Watchers:
                31 Start watching this issue

                Dates

                • Created:
                  Updated: