Public Attributes | |
| MDB_cursor * | mc_next |
| MDB_cursor * | mc_backup |
| struct MDB_xcursor * | mc_xcursor |
| MDB_txn * | mc_txn |
| MDB_dbi | mc_dbi |
| MDB_db * | mc_db |
| MDB_dbx * | mc_dbx |
| unsigned char * | mc_dbflag |
| unsigned short | mc_snum |
| unsigned short | mc_top |
| unsigned int | mc_flags |
| MDB_page * | mc_pg [CURSOR_STACK] |
| indx_t | mc_ki [CURSOR_STACK] |
Detailed Description
Cursors are used for all DB operations. A cursor holds a path of (page pointer, key index) from the DB root to a position in the DB, plus other state. MDB_DUPSORT cursors include an xcursor to the current data item. Write txns track their cursors and keep them up to date when data moves. Exception: An xcursor's pointer to a P_SUBP page can be stale. (A node with F_DUPDATA but no F_SUBDATA contains a subpage).
Member Data Documentation
◆ mc_backup
| MDB_cursor* MDB_cursor::mc_backup |
Backup of the original cursor if this cursor is a shadow
◆ mc_db
| MDB_db* MDB_cursor::mc_db |
The database record for this cursor
◆ mc_dbflag
| unsigned char* MDB_cursor::mc_dbflag |
The Transaction DB Flags for this database
◆ mc_dbi
| MDB_dbi MDB_cursor::mc_dbi |
The database handle this cursor operates on
◆ mc_dbx
| MDB_dbx* MDB_cursor::mc_dbx |
The database auxiliary record for this cursor
◆ mc_flags
| unsigned int MDB_cursor::mc_flags |
◆ mc_ki
| indx_t MDB_cursor::mc_ki[CURSOR_STACK] |
stack of page indices
◆ mc_next
| MDB_cursor* MDB_cursor::mc_next |
Next cursor on this DB in this txn
◆ mc_pg
| MDB_page* MDB_cursor::mc_pg[CURSOR_STACK] |
stack of pushed pages
◆ mc_snum
| unsigned short MDB_cursor::mc_snum |
number of pushed pages
◆ mc_top
| unsigned short MDB_cursor::mc_top |
index of top page, normally mc_snum-1
◆ mc_txn
| MDB_txn* MDB_cursor::mc_txn |
The transaction that owns this cursor
◆ mc_xcursor
| struct MDB_xcursor* MDB_cursor::mc_xcursor |
Context used for databases with MDB_DUPSORT, otherwise NULL
The documentation for this struct was generated from the following file:
- external/db_drivers/liblmdb/mdb.c
