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Push the patch of Jan Lindstrom: better comments
ha_innodb.cc:
  Partial fix for Bug #12263 : we let InnoDB always to perform a rollback on the trx object if MySQL closes a connection; but we do print a warning to the .err log if an InnoDB transaction was active; we may remove that print later, since the situation really is not a bug; MySQL just is not aware that some cursor operation started an InnoDB transaction
This commit is contained in:
heikki@hundin.mysql.fi
2005-08-03 17:09:21 +03:00
parent 05d4c0c748
commit 74fd4504bb
9 changed files with 89 additions and 57 deletions
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21
sql/ha_innodb.h
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@ -302,7 +302,7 @@ which is in the prepared state */
int innobase_rollback_by_xid(
/* out: 0 or error number */
XID *xid); /* in : X/Open XA Transaction Idenfification */
XID *xid); /* in : X/Open XA Transaction Identification */
int innobase_xa_end(THD *thd);
@ -312,9 +312,10 @@ int innobase_repl_report_sent_binlog(THD *thd, char *log_file_name,
my_off_t end_offset);
/***********************************************************************
This function creates a consistent view for a cursor and start a transaction
if it has not been started. This consistent view is then used inside of MySQL
when accesing records using a cursor. */
Create a consistent view for a cursor based on current transaction
which is created if the corresponding MySQL thread still lacks one.
This consistent view is then used inside of MySQL when accessing records
using a cursor. */
void*
innobase_create_cursor_view(void);
@ -322,9 +323,9 @@ innobase_create_cursor_view(void);
/* out: Pointer to cursor view or NULL */
/***********************************************************************
This function closes the given consistent cursor view. Note that
global read view is restored to a transaction and a transaction is
started if it has not been started. */
Close the given consistent cursor view of a transaction and restore
global read view to a transaction read view. Transaction is created if the
corresponding MySQL thread still lacks one. */
void
innobase_close_cursor_view(
@ -332,8 +333,10 @@ innobase_close_cursor_view(
void* curview); /* in: Consistent read view to be closed */
/***********************************************************************
This function sets the given consistent cursor view to a transaction.
If a transaction does not exist, transaction is started. */
Set the given consistent cursor view to a transaction which is created
if the corresponding MySQL thread still lacks one. If the given
consistent cursor view is NULL global read view of a transaction is
restored to a transaction read view. */
void
innobase_set_cursor_view(