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  1. MariaDB Server
  2. MDEV-5218

mysql command line client prints broken tables for combining characters

        Details

        • Type: Bug
        • Status: Open
        • Priority: Minor
        • Resolution: Unresolved
        • Affects Version/s: 10.0.4, 5.1.67, 5.2.14, 5.3.12, 5.5.33a
        • Fix Version/s: None
        • Component/s: None
        • Labels:
          None

          Description

          The query below selects a sequence consisting of three
          Unicode code points:

          U+0055 LATIN CAPITAL LETTER U
          U+031B COMBINING HORN
          U+0323 COMBINING DOT BELOW

          They make all together a single letter equivalent to
          "U+1EF0 LATIN CAPITAL LETTER U WITH HORN AND DOT BELOW"
          and occupy a single cell in the terminal screen.
          The combining marks are printed on top and below the letter U.

          The code in "mysql" client erroneously considers combining marks
          as normal characters, each occupying its own cell in the screen.
          As a result, any sequence with combining marks prints a broken
          table with the rightmost border put on a wrong place:

          mysql> select _ucs2 0x0055031B0323;
+----------------------+
| _ucs2 0x0055031B0323 |
+----------------------+
| Ự                  |
+----------------------+
1 row in set (0.00 sec)

          Note, the border is correct in case of the equivalent pre-composed character:

          mysql> select _ucs2 0x1EF0;
+--------------+
| _ucs2 0x1EF0 |
+--------------+
| Ự            |
+--------------+
1 row in set (0.00 sec)

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                  • Assignee:
                    bar Alexander Barkov
                    Reporter:
                    bar Alexander Barkov
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                    Dates

                    • Created:
                      Updated: