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BUG#47678 Changes to n-tables that happen early in a trans. are only flushed upon commit

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Let
    - T be a transactional table and N non-transactional table.
    - B be begin, C commit and R rollback.
    - N be a statement that accesses and changes only N-tables.
    - T be a statement that accesses and changes only T-tables.

In RBR, changes to N-tables that happen early in a transaction are not immediately flushed
upon committing a statement. This behavior may, however, break consistency in the presence
of concurrency since changes done to N-tables become immediately visible to other
connections. To fix this problem, we do the following:

  . B N N T C would log - B N C B N C B T C.
  . B N N T R would log - B N C B N C B T R.

Note that we are not preserving history from the master as we are introducing a commit that
never happened. However, this seems to be more acceptable than the possibility of breaking
consistency in the presence of concurrency.
This commit is contained in:
Alfranio Correia
2009-10-06 01:54:00 +01:00
parent 14d1909440
commit 7e0da4352c
6 changed files with 469 additions and 10 deletions
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4
mysql-test/suite/rpl/r/rpl_row_create_table.result
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@@ -176,7 +176,7 @@ Log_name Pos Event_type Server_id End_log_pos Info
# 106 Query # 174 BEGIN
# 174 Table_map # 216 table_id: # (test.t7)
# 216 Write_rows # 272 table_id: # flags: STMT_END_F
# 272 Query # 343 ROLLBACK
# 272 Query # 341 COMMIT
SELECT * FROM t7 ORDER BY a,b;
a b
1 2
@@ -327,7 +327,7 @@ Log_name Pos Event_type Server_id End_log_pos Info
# 1329 Query # 1397 BEGIN
# 1397 Table_map # 1438 table_id: # (test.t1)
# 1438 Write_rows # 1482 table_id: # flags: STMT_END_F
# 1482 Query # 1553 ROLLBACK
# 1482 Query # 1551 COMMIT
SHOW TABLES;
Tables_in_test
t1