Two indexes are created by default during the table creation: the ROWID and RECBYT indexes.
The ROWID index holds the auto-increment value generated automatically by c-tree every time a new record is added to the table.
When a table is created with ROWID support, a ROWID index is automatically created for the table. The operation of the ROWID index is transparent to the c-treeDB API user. c-treeDB API will automatically update the index entries. The ROWID index will not appear in the list of indexes for a table. The user cannot alter or delete the components of the ROWID index.
Functions that deal with the ROWID index are:
By default, all c-treeDB API tables are created with support for the ROWID index. To create a table without ROWID support, the CTCREATE_NOROWID should be OR-ed into the create mode parameter to the ctdbCreateTable() function.