DDS-XTypes 1.4b1 RTF Avatar
  1. OMG Issue

DDSXTY14 — Add Unions to types supported in Queries and Filters

Open Closed All
  • Key: DDSXTY14-1
  • Status: closed  
  • Source: Object Computing, Inc. - OCI ( Mr. Adam Mitz)
  • Summary:

    "Member Names" (7.6.7.1) is missing support for Unions. Union members can be accessed by name as long as a reserved name is specified for the discriminator. A valid filter expression needs to check the discriminator before accessing another member name (for example u.disc = 3 AND u.val < 100), however the implementation doesn't need to check for this. If evaluating a filter expression causes access to an inactive element of a union, the result is undefined.
  • Reported: DDS-XTypes 1.3b1 — Mon, 22 Jul 2019 15:36 GMT
  • Disposition: Resolved — DDS-XTypes 1.4b1
  • Disposition Summary:

    Add explanation for unions in queries & filters

    Explain how union member values are specified within filters and queries
  • Updated: Wed, 12 Aug 2026 16:39 GMT