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  1. MariaDB Server
  2. MDEV-18710

Unexpected ER_EXPRESSION_REFERS_TO_UNINIT_FIELD (Expression for field `DB_ROW_HASH_1` is refering to uninitialized field `DB_ROW_HASH_1`) upon modifying column into a blob

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    Description

      Note: The failure became possible after MDEV-371, without it ALTER is rejected due to the missing length in the key definition.
      See also MDEV-18708 and MDEV-18709, might be related or have the same root cause. MDEV-18709 has a very similar test case.

      --source include/have_innodb.inc
      		 
       
      		 
      CREATE TABLE t1 ( 
        pk INT,
      		 
        a CHAR(100),
      		 
        b INT,
      		 
        c CHAR(100),
      		 
        PRIMARY KEY(pk),
      		 
        KEY(a(64)),
      		 
        KEY(pk,b),
      		 
        KEY(c(64))
      		 
      ) ENGINE=InnoDB;
      		 
      ALTER TABLE t1 MODIFY b TEXT;
      		 
       
      		 
      # Cleanup
      		 
      DROP TABLE t1;

      10.4 fb01193c

      		 
      mysqltest: At line 13: query 'ALTER TABLE t1 MODIFY b TEXT' failed: 4029: Expression for field `DB_ROW_HASH_1` is refering to uninitialized field `DB_ROW_HASH_1`

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          is caused by

          Task - A task that needs to be done. MDEV-371 Unique indexes for blobs

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

          Bug - A problem which impairs or prevents the functions of the product. MDEV-18708 Server crash in Item_field::register_field_in_read_map upon modifying column into a blob

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-18709 Server crash or ASAN heap-buffer-overflow in create_index upon modifying column into a blob

          • Major - Major loss of function.
          • Closed

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              serg Sergei Golubchik
              elenst Elena Stepanova
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                Updated:
                Resolved:

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