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  1. MariaDB Server
  2. MDEV-17250

Remove unused Item_copy_xxx

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      Description

      In this class hierarchy:

        Item_copy
          Item_copy_string
          Item_copy_int
            Item_copy_uint
          Item_copy_float
          Item_copy_decimal
      

      Only Item_copy_string is used in the code.

      We'll remove all unused classes.
      We'll also make sure to add tests from the original commit that added those classes:

      commit 73481404656a954b314398f26ee7b4e3aec14282
      Author: Georgi Kodinov <joro@sun.com>
      Date:   Mon May 25 11:00:40 2009 +0300
       
          Bug #44399 : crash with statement using TEXT columns, aggregates, GROUP BY, and
          HAVING
      

      This problem seems to be earlier fixed in a different way in MariaDB, without using Item_copy_(int|uint|float|decimal).

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            Assignee:
            bar Alexander Barkov
            Reporter:
            bar Alexander Barkov
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              Updated:
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