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  1. MariaDB Server
  2. MDEV-12681

Wrong VIEW results for CHAR(0xDF USING latin1)

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    Description

      In Linux console, I run

      SET NAMES utf8;
      SELECT CHAR(0xDF USING latin1);
      

      +-------------------------+
      | CHAR(0xDF USING latin1) |
      +-------------------------+
      | ß                       |
      +-------------------------+
      

      Notice, it correctly returned LATIN SMALL LETTER SHARP S.

      Now I put the same expression into a view and query the view:

      CREATE OR REPLACE VIEW v1 AS SELECT CHAR(0xDF USING latin1) AS c;
      SELECT * FROM v1;
      

      +---+
      | c |
      +---+
      | �  |
      +---+
      

      Notice, it returned some garbage (Linux console changed garbage to U+FFFD REPLACEMENT CHARACTER).
      Looks wrong. The expected result is to return the same SHARP S character.

      The problem is that Item_func_char::print() does not display the USING clause:

      SHOW CREATE VIEW v1;
      

      +------+------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+
      | View | Create View                                                                                                      | character_set_client | collation_connection |
      +------+------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+
      | v1   | CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select char(0xdf) AS `c` | utf8                 | utf8_general_ci      |
      +------+------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+
      

      Notice, it prints:

      char(0xdf)
      

      It should print:

      char(0xdf using latin1)
      

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            bar Alexander Barkov created issue -
            bar Alexander Barkov made changes -
            Field Original Value New Value
            bar Alexander Barkov made changes -
            Status Open [ 1 ] In Progress [ 3 ]
            bar Alexander Barkov made changes -
            Fix Version/s 10.0 [ 16000 ]
            Fix Version/s 10.1 [ 16100 ]
            Fix Version/s 10.2 [ 14601 ]
            bar Alexander Barkov made changes -
            Fix Version/s 10.0.34 [ 22613 ]
            Fix Version/s 10.1.30 [ 22637 ]
            Fix Version/s 10.2.11 [ 22634 ]
            Fix Version/s 10.3.3 [ 22644 ]
            Fix Version/s 10.2 [ 14601 ]
            Fix Version/s 10.0 [ 16000 ]
            Fix Version/s 10.1 [ 16100 ]
            Fix Version/s 10.3 [ 22126 ]
            Resolution Fixed [ 1 ]
            Status In Progress [ 3 ] Closed [ 6 ]
            serg Sergei Golubchik made changes -
            Workflow MariaDB v3 [ 80594 ] MariaDB v4 [ 152084 ]

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              bar Alexander Barkov
              bar Alexander Barkov
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                Updated:
                Resolved:

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