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  1. MariaDB Server
  2. MDEV-12775

Reuse data type aggregation code for hybrid functions and UNION

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      Currently we have two versions of data type attribute aggregation code:

      • For hybrid functions, implemented in Type_handler::Item_hybrid_func_fix_attributes()
      • For UNION, implemented in Item_type_holder::join_types()

      Both versions do the same thing, but in some cases UNION is not precise enough.
      See bugs: MDEV-9495, MDEV-9497, MDEV-12594, MDEV-12595, MDEV-12599.

      Under terms of this task we'll make the UNION related code reuse the code implemented in Type_handler::Item_hybrid_func_fix_attributes() and get rid of the second implementation in Item_type_holder::join_types().

      This, among fixing the mentioned bugs, will simplify development of data type plugins, as the implementer will have to do less coding.

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              • Assignee:
                bar Alexander Barkov
                Reporter:
                bar Alexander Barkov
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