Drizzled Public API Documentation

trx_undo_struct Struct Reference

#include <trx0undo.h>

List of all members.

Public Member Functions

 UT_LIST_NODE_T (trx_undo_t) undo_list

Public Attributes

ulint id
ulint type
ulint state
ibool del_marks
trx_id_t trx_id
XID xid
ibool dict_operation
table_id_t table_id
trx_rseg_trseg
ulint space
ulint zip_size
ulint hdr_page_no
ulint hdr_offset
ulint last_page_no
ulint size
ulint empty
ulint top_page_no
ulint top_offset
undo_no_t top_undo_no
buf_block_tguess_block

Detailed Description

Transaction undo log memory object; this is protected by the undo_mutex in the corresponding transaction object

Definition at line 357 of file trx0undo.h.


Member Function Documentation

undo log objects in the rollback segment are chained into lists


Member Data Documentation

relevant only in an update undo log: this is TRUE if the transaction may have delete marked records, because of a delete of a row or an update of an indexed field; purge is then necessary; also TRUE if the transaction has updated an externally stored field

Definition at line 365 of file trx0undo.h.

Referenced by trx_purge_add_update_undo_to_history().

TRUE if a dict operation trx

Definition at line 377 of file trx0undo.h.

Referenced by trx_lists_init_at_db_start().

TRUE if the stack of undo log records is currently empty

Definition at line 395 of file trx0undo.h.

Referenced by trx_lists_init_at_db_start(), trx_roll_pop_top_rec_of_trx(), and trx_undo_report_row_operation().

guess for the buffer block where the top page might reside

Definition at line 405 of file trx0undo.h.

Referenced by trx_undo_report_row_operation().

header offset of the undo log on the page

Definition at line 388 of file trx0undo.h.

Referenced by trx_purge_add_update_undo_to_history(), and trx_undo_truncate_end().

undo log slot number within the rollback segment

Definition at line 359 of file trx0undo.h.

Referenced by trx_purge_add_update_undo_to_history(), trx_undo_mem_free(), trx_undo_set_state_at_finish(), and trx_undo_set_state_at_prepare().

page number of the last page in the undo log; this may differ from top_page_no during a rollback

Definition at line 390 of file trx0undo.h.

Referenced by trx_undo_add_page(), trx_undo_report_row_operation(), and trx_undo_truncate_end().

rseg where the undo log belongs

Definition at line 380 of file trx0undo.h.

Referenced by trx_purge_add_update_undo_to_history(), and trx_roll_pop_top_rec_of_trx().

if a dict operation, then the table id

Definition at line 378 of file trx0undo.h.

Referenced by trx_lists_init_at_db_start().

offset of the latest undo record, i.e., the topmost element in the undo log if we think of it as a stack

Definition at line 401 of file trx0undo.h.

Referenced by trx_roll_pop_top_rec_of_trx(), and trx_undo_report_row_operation().

page number where the latest undo log record was catenated; during rollback the page from which the latest undo record was chosen

Definition at line 397 of file trx0undo.h.

Referenced by trx_roll_pop_top_rec_of_trx(), trx_undo_add_page(), and trx_undo_report_row_operation().

id of the trx assigned to the undo log

Definition at line 373 of file trx0undo.h.

Referenced by trx_lists_init_at_db_start().

TRX_UNDO_INSERT or TRX_UNDO_UPDATE

Definition at line 361 of file trx0undo.h.

Referenced by trx_undo_add_page(), and trx_undo_set_state_at_finish().

X/Open XA transaction identification

Definition at line 375 of file trx0undo.h.

Referenced by trx_lists_init_at_db_start(), and trx_undo_set_state_at_prepare().

compressed page size of space in bytes, or 0 for uncompressed

Definition at line 384 of file trx0undo.h.

Referenced by trx_undo_add_page(), trx_undo_report_row_operation(), trx_undo_set_state_at_finish(), trx_undo_set_state_at_prepare(), and trx_undo_truncate_end().


The documentation for this struct was generated from the following file: