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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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47
mysql-test/t/rpl_heap.test Normal file
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# You must run this test with --manager.
require_manager;
# Don't know why, but using TCP/IP connections makes this test fail
# with "Lost connection to MySQL server during query" when we
# issue a query after the server restart.
# Maybe this is something awkward in mysqltest or in the manager?
# So we use sockets.
connect (master,localhost,root,,test,0,master.sock);
connect (slave,localhost,root,,test,0,slave.sock);
connection master;
reset master;
drop table if exists t1;
create table t1 (a int) type=HEAP;
insert into t1 values(10);
save_master_pos;
show binlog events from 79;
connection slave;
reset slave;
start slave;
sync_with_master;
show create table t1;
select * from t1; # should be one row
server_stop master;
server_start master;
connection master;
select * from t1;
# to check that DELETE is not written twice
# (the LIMIT is to not use the query cache)
select * from t1 limit 10;
save_master_pos;
show binlog events in 'master-bin.002' from 79;
connection slave;
sync_with_master;
select * from t1; # should be empty
# clean up
connection master;
drop table t1;
save_master_pos;
connection slave;
sync_with_master;