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MySQL 9.0.0
Source Code Documentation
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Row undo. More...
#include "btr0pcur.h"
#include "btr0types.h"
#include "dict0types.h"
#include "mtr0mtr.h"
#include "que0types.h"
#include "row0types.h"
#include "trx0sys.h"
#include "trx0types.h"
#include "univ.i"
#include "ut0ut.h"
Go to the source code of this file.
Classes | |
struct | Long_undo_state |
State of long running undo operation for purpose of writing periodic messages to error log. More... | |
struct | undo_node_t |
Undo node structure. More... | |
Enumerations | |
enum | undo_exec { UNDO_NODE_FETCH_NEXT = 1 , UNDO_NODE_INSERT , UNDO_NODE_MODIFY } |
Execution state of an undo node. More... | |
Functions | |
void | row_convert_impl_to_expl_if_needed (btr_cur_t *cursor, undo_node_t *node) |
Converts an implicit lock on the record to explicit in case of partial rollback. More... | |
undo_node_t * | row_undo_node_create (trx_t &trx, que_thr_t *parent, mem_heap_t *heap, bool partial_rollback) |
Creates a row undo node to a query graph. More... | |
bool | row_undo_search_clust_to_pcur (undo_node_t *node) |
Looks for the clustered index record when node has the row reference. More... | |
que_thr_t * | row_undo_step (que_thr_t *thr) |
Undoes a row operation in a table. More... | |
Row undo.
Created 1/8/1997 Heikki Tuuri
enum undo_exec |
void row_convert_impl_to_expl_if_needed | ( | btr_cur_t * | cursor, |
undo_node_t * | node | ||
) |
Converts an implicit lock on the record to explicit in case of partial rollback.
[in] | cursor | cursor to record |
[in] | node | undo node |
undo_node_t * row_undo_node_create | ( | trx_t & | trx, |
que_thr_t * | parent, | ||
mem_heap_t * | heap, | ||
bool | partial_rollback | ||
) |
Creates a row undo node to a query graph.
[in] | trx | transaction |
[in] | parent | parent node, i.e., a thr node |
[in] | heap | memory heap where created |
[in] | partial_rollback | true if partial rollback |
bool row_undo_search_clust_to_pcur | ( | undo_node_t * | node | ) |
Looks for the clustered index record when node has the row reference.
The pcur in node is used in the search. If found, stores the row to node, and stores the position of pcur, and detaches it. The pcur must be closed by the caller in any case.
The pcur in node is used in the search. If found, stores the row to node, and stores the position of pcur, and detaches it. The pcur must be closed by the caller in any case.
node | in/out: row undo node |
Undoes a row operation in a table.
This is a high-level function used in SQL execution graphs.
This is a high-level function used in SQL execution graphs.
thr | in: query thread |