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Fix for BUG#2477 "Slave stop with error after master reboot if use HEAP tables":

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when we open the HEAP table for the first time since server restart,
in hp_open(), we set a flag to propagate this info to the handler level
which then writes a DELETE FROM this_heap_table to the binlog.
It is not a perfect solution for the bug, because between the server start and 
the first open of the table, the slave still had old data in his table so
a SELECT on the slave may show wrong content. But if there is a --init-file
to populate the HEAP table on master as startup, then this is a safe fix
(I'll put a note about init-file in the HEAP section of the manual).


heap/hp_info.c:
  new info variable implicit_emptied
heap/hp_open.c:
  If this is the first open of the HEAP table, it means it is empty,
  so we mark it.
include/heap.h:
  new variables implicit_emptied
  (we need one in HEAPINFO for the hp_info() call).
sql/ha_heap.cc:
  report info to upper level
sql/handler.h:
  new info 'implicit_emptied' in the handler level; only HEAP uses it.
sql/sql_base.cc:
  When a HEAP table is opened for the first time, write a DELETE FROM to the binlog,
  for replication and mysqlbinlog|mysql.
  Monty: I added the
  entry->file->implicit_emptied= 0;
This commit is contained in:
unknown
2004-01-30 00:05:34 +01:00
parent 8746a25554
commit bbd2adf4ba
8 changed files with 136 additions and 18 deletions
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29
mysql-test/r/rpl_heap.result Normal file
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reset master;
drop table if exists t1;
create table t1 (a int) type=HEAP;
insert into t1 values(10);
show binlog events from 79;
Log_name Pos Event_type Server_id Orig_log_pos Info
master-bin.001 79 Query 1 79 use `test`; create table t1 (a int) type=HEAP
master-bin.001 147 Query 1 147 use `test`; DELETE FROM `test`.`t1`
master-bin.001 205 Query 1 205 use `test`; insert into t1 values(10)
reset slave;
start slave;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) default NULL
) TYPE=HEAP
select * from t1;
a
10
select * from t1;
a
select * from t1 limit 10;
a
show binlog events in 'master-bin.002' from 79;
Log_name Pos Event_type Server_id Orig_log_pos Info
master-bin.002 79 Query 1 79 use `test`; DELETE FROM `test`.`t1`
select * from t1;
a
drop table t1;