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  1. MariaDB Server
  2. MDEV-19506

Remove the global sequence DICT_HDR_ROW_ID for DB_ROW_ID

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      InnoDB tables that lack a primary key (and any UNIQUE INDEX whose all columns are NOT NULL) will use an internally generated index, called GEN_CLUST_INDEX(DB_ROW_ID) in the InnoDB data dictionary, and hidden from the SQL layer.

      The 48-bit DB_ROW_ID is being assigned from a global sequence that is persisted in the DICT_HDR page.

      There is absolutely no reason for the DB_ROW_ID to be globally unique across all InnoDB tables. We should replace dict_sys_get_new_row_id() with a simple atomic increment of a counter in dict_table_t. When the table is opened for the first time, btr_cur_instant_init_low() can initialize the per-table counter by doing something similar to row_search_max_autoinc().

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          New Feature - A new feature of the product, which has yet to be developed. MDEV-11633 Make the InnoDB system tablespace optional

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

          New Feature - A new feature of the product, which has yet to be developed. MDEV-21181 Automatic invisible primary key

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Stalled

          New Feature - A new feature of the product, which has yet to be developed. MDEV-24001 Implement hidden PK for RBR of no-unique key table

          • Major - Major loss of function.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. MDEV-38352 Mysqld crash in buf_page_t::is_accessed

          • Major - Major loss of function.
          • Open

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              marko Marko Mäkelä
              marko Marko Mäkelä
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