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  1. MariaDB Server
  2. MDEV-12964

sql_mode=ORACLE: multi-columns Unique index behavior to expect with NULL value

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    • Type: Task
    • Status: Open (View Workflow)
    • Priority: Major
    • Resolution: Unresolved
    • Fix Version/s: None
    • Component/s: None
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      Description

      Multi-columns Unique index behavior with NULL value should be same as Oracle db server when setting sql_mode=ORACLE

      Init :
      CREATE TABLE `test` (
      `Col1` VARCHAR(50) NULL,
      `Col2` VARCHAR(50) NULL,
      UNIQUE INDEX `UX_COL1_COL2` (`Col1`, `Col2`)
      )
      ENGINE=InnoDB;
      insert into TEST (Col1, Col2) values ('A','B'), (NULL,NULL), ('A',NULL), (NULL,'B');

      Use cases :
      insert into TEST (Col1, Col2) values (NULL,NULL);
      => accepted by Oracle (11.2) & MariaDB (10.2, 10.3) => OK

      insert into TEST (Col1, Col2) values ('A',NULL);
      => rejected by Oracle (11.2) but accepted by MariaDB (10.2, 10.3) => Issue
      insert into TEST (Col1, Col2) values (NULL,'B');
      => rejected by Oracle (11.2) but accepted by MariaDB (10.2, 10.3) => Issue

      insert into TEST (Col1, Col2) values ('A','B');
      => rejected by Oracle (11.2) & MariaDB (10.2, 10.3) => OK

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              Assignee:
              Unassigned
              Reporter:
              djegou David JEGOU
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                Created:
                Updated: