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  1. MariaDB Server
  2. MDEV-10142 PL/SQL parser
  3. MDEV-11880

sql_mode=ORACLE: Make the concatenation operator ignore NULL arguments

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    • 10.2.2-3, 10.2.2-1, 10.2.2-2, 10.2.2-4, 10.1.18

    Description

      The concatenation operator || in Oracle skips all NULL arguments and returns the result of concatenation of non-NULL arguments.
      NULL is returned only if all arguments were NULL.

      Under terms of this task we'll make the || operator work in Oracle style when sql_mode is ORACLE.

      Note, the function CONCAT won't be changed by this task.

      There is a contributed patch from Jérôme Brauge implementing this feature:

      https://lists.launchpad.net/maria-developers/msg10288.html

      It adds a new flag MODE_CONCAT_NULL_YIELDS_NULL_OFF.
      We'll probably won't add the flag and just perform the Oracle style concatenation when sql_mode & MODE_ORACLE is set.

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        Issue Links

          is blocked by

          Bug - A problem which impairs or prevents the functions of the product. MDEV-11848 Automatic statement repreparation changes query semantics

          • Major - Major loss of function.
          • Closed
          is duplicated by

          Task - A task that needs to be done. MDEV-11516 Support of opérator || for string concatenation

          • Major - Major loss of function.
          • Closed
          relates to

          Technical task - A technical task. MDEV-12143 sql_mode=ORACLE: Make the CONCAT function ignore NULL arguments

          • Major - Major loss of function.
          • Closed

          Technical task - A technical task. MDEV-10574 sql_mode=ORACLE: IS NULL and empty strings

          • Major - Major loss of function.
          • Open

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              bar Alexander Barkov
              bar Alexander Barkov
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                Resolved:

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