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

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;

1 files changed, 1 insertions, 0 deletions

diff --git a/sql/ha_heap.cc b/sql/ha_heap.cc
index 2edc3b1478e..eb4bf517374 100644
--- a/sql/ha_heap.cc
+++ b/sql/ha_heap.cc
@@ -222,6 +222,7 @@ void ha_heap::info(uint flag)
   index_file_length=info.index_length;
   max_data_file_length= info.max_records* info.reclength;
   delete_length= info.deleted * info.reclength;
+  implicit_emptied= info.implicit_emptied;
 }
 
 int ha_heap::extra(enum ha_extra_function operation)