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  1. MariaDB Server
  2. MDEV-14668

ADD PRIMARY KEY IF NOT EXISTS on composite key

Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 10.0.31, 10.2.11, 10.0(EOL), 10.1(EOL), 10.2(EOL)
    • 10.0.36
    • Data Definition - Alter Table
    • None
    • Linux Mint

    Description

      I try to alter table to add a composite primary key with "if not exists clause" to a table. One of these column is already in a composite unique index with an other column.

      I get warning code 1061 "Multiple primary key defined".
      But without "IF NOT EXISTS", it works fine.

      This is my example :

      CREATE TABLE `HORIZON` (
      		 
      	`ID` BIGINT(20) NOT NULL,
      		 
      	`RANK` MEDIUMINT(4) NOT NULL,
      		 
      	`CHECK_POINT` BIGINT(20) NOT NULL,
      		 
      	UNIQUE INDEX `HORIZON_UIDX01` (`ID`, `RANK`)
      		 
      ) COLLATE='utf8_general_ci' ENGINE=InnoDB ;
      		 
       
      		 
      ALTER TABLE `HORIZON` ADD PRIMARY KEY IF NOT EXISTS (`ID`, `CHECK_POINT`); /* warning code 1061 */
      		 
      ALTER TABLE `HORIZON` ADD PRIMARY KEY (`ID`, `CHECK_POINT`); /* works fine */

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-8358 ALTER TABLE .. ADD PRIMARY KEY IF NOT EXISTS -> ERROR 1068 (42000): Multiple primary key defined

          • Major - Major loss of function.
          • Closed

          Activity

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              holyfoot Alexey Botchkov
              antoine.lange Antoine Lange
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              Dates

                Created:
                Updated:
                Resolved:

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