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Implement MySQL framework to support consistent read views in

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cursors. This should fix Bug#11813 when InnoDB part is in 
(tested with a draft patch).
The idea of the patch is that if a storage engine supports
consistent read views, we open one when open a cursor,
set is as the active view when fetch from the cursor, and close
together with cursor close.
This commit is contained in:
konstantin@mysql.com
2005-07-20 20:02:36 +04:00
parent 4570ace8fb
commit 21957c423e
15 changed files with 151 additions and 95 deletions
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9
sql/handler.h
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@ -106,9 +106,11 @@
/*
Note: the following includes binlog and closing 0.
so: innodb+bdb+ndb+binlog+0
so: innodb + bdb + ndb + binlog + myisam + myisammrg + archive +
example + csv + heap + blackhole + federated + 0
(yes, the sum is deliberately inaccurate)
*/
#define MAX_HA 6
#define MAX_HA 14
/*
Bits in index_ddl_flags(KEY *wanted_index)
@ -349,6 +351,9 @@ typedef struct
int (*recover)(XID *xid_list, uint len);
int (*commit_by_xid)(XID *xid);
int (*rollback_by_xid)(XID *xid);
void *(*create_cursor_read_view)();
void (*set_cursor_read_view)(void *);
void (*close_cursor_read_view)(void *);
uint32 flags; /* global handler flags */
} handlerton;