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  1. Apache HAWQ (Retired)
  2. HAWQ-583 Extend PXF to allow plugins to support returning partial content of SELECT(column projection)
  3. HAWQ-927

Send Projection Info Data from HAWQ to PXF

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    Description

      To achieve column projection at the level of PXF or the underlying readers we need to first send this data as a Header/Param to PXF. Currently, PXF has no knowledge whether a query requires all columns or a subset of columns.
      Proposal is to send the following two attributes as part of the HTTP header in the Rest Api from HAWQ to PXF
      X-GP-ATTRS-PROJ - Indicates the number of attributes/columns to be projected
      X-GP-ATTRS-PROJ-IDX - Indicates the Column index(s) to be projected

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          is related to

          Sub-task - The sub-task of the issue HAWQ-967 Extend Projection info to include filter attributes

          • Blocker - Blocks development and/or testing work, production could not run
          • Resolved
          relates to

          Bug - A problem which impairs or prevents the functions of the product. HAWQ-973 Check pi_varList as additional condition before passing projection info

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

          Web Link GitHub Pull Request #796

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              kavinderd Kavinder Dhaliwal
              kavinderd Kavinder Dhaliwal
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