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  1. MariaDB Server
  2. MDEV-26824

Can't add foreign key with empty referenced columns list

Details

    Description

      Assertion failure i==j on ADD FOREIGN KEY

      The following test case triggers a debug assertion failure during ALTER TABLE:

      --source include/have_innodb.inc
      		 
      CREATE TABLE t1(a INT PRIMARY KEY) ENGINE=InnoDB;
      		 
      CREATE TABLE t2(a INT PRIMARY KEY) ENGINE=InnoDB;
      		 
      ALTER TABLE t2 ADD FOREIGN KEY(a) REFERENCES t1;
      		 
      DROP TABLE t2, t1;

      10.5 f1acd9f14bd054b8d8d576c6fe567226c097132d

      		 
      mysqltest: At line 4: query 'ALTER TABLE t2 ADD FOREIGN KEY(a) REFERENCES t1' failed: 2013: Lost connection to MySQL server during query
      		 
      ...
      		 
      mariadbd: /mariadb/10.5/storage/innobase/handler/ha_innodb.cc:12306: dberr_t create_table_info_t::create_foreign_keys(): Assertion `i == j' failed.

      The reason appears to be that an empty column list will be passed for the REFERENCES t1. I would expect that the matching column names be looked up (in this case a) and their data type compatibility be checked before ha_innobase::create() is invoked.

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        Issue Links

          is caused by

          Task - A task that needs to be done. MDEV-20480 Obsolete internal parser for FK in InnoDB

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-26554 Table-rebuilding DDL on parent table causes crash for INSERT into child table

          • Blocker - Blocks development and/or testing work, production could not run.
          • Closed

          Activity

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            midenok Aleksey Midenkov added a comment -

            Please review bb-10.5-midenok

            midenok Aleksey Midenkov added a comment - Please review bb-10.5-midenok
            sanja Oleksandr Byelkin added a comment -

            OK to push, but try to make better commit message (describe problem (what was wrong)).

            sanja Oleksandr Byelkin added a comment - OK to push, but try to make better commit message (describe problem (what was wrong)).

            People

              midenok Aleksey Midenkov
              marko Marko Mäkelä
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                Updated:
                Resolved:

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