Data Fields | |
| btr_cur_t | btr_cur |
| ulint | latch_mode |
| ulint | old_stored |
| rec_t * | old_rec |
| ulint | old_n_fields |
| ulint | rel_pos |
| buf_block_t * | block_when_stored |
| ib_uint64_t | modify_clock |
| enum pcur_pos_t | pos_state |
| ulint | search_mode |
| trx_t * | trx_if_known |
| byte * | old_rec_buf |
| ulint | buf_size |
Field Documentation
| btr_cur_t btr_pcur_t::btr_cur |
a B-tree cursor
| ulint btr_pcur_t::buf_size |
old_rec_buf size if old_rec_buf is not NULL
| ulint btr_pcur_t::latch_mode |
see TODO note below! BTR_SEARCH_LEAF, BTR_MODIFY_LEAF, BTR_MODIFY_TREE, or BTR_NO_LATCHES, depending on the latching state of the page and tree where the cursor is positioned; BTR_NO_LATCHES means that the cursor is not currently positioned: we say then that the cursor is detached; it can be restored to attached if the old position was stored in old_rec
| ib_uint64_t btr_pcur_t::modify_clock |
the modify clock value of the buffer block when the cursor position was stored
| ulint btr_pcur_t::old_n_fields |
number of fields in old_rec
| rec_t* btr_pcur_t::old_rec |
if cursor position is stored, contains an initial segment of the latest record cursor was positioned either on, before, or after
| byte* btr_pcur_t::old_rec_buf |
NULL, or a dynamically allocated buffer for old_rec
| ulint btr_pcur_t::old_stored |
BTR_PCUR_OLD_STORED or BTR_PCUR_OLD_NOT_STORED
| enum pcur_pos_t btr_pcur_t::pos_state |
btr_pcur_store_position() and btr_pcur_restore_position() state.
| ulint btr_pcur_t::rel_pos |
BTR_PCUR_ON, BTR_PCUR_BEFORE, or BTR_PCUR_AFTER, depending on whether cursor was on, before, or after the old_rec record
| ulint btr_pcur_t::search_mode |
PAGE_CUR_G, ...
| trx_t* btr_pcur_t::trx_if_known |
the transaction, if we know it; otherwise this field is not defined; can ONLY BE USED in error prints in fatal assertion failures!
The documentation for this struct was generated from the following file:
- include/btr0pcur.h
