Make SEQUENCE working with replication

- Old sequence code forced row based replication for any statements that
  refered to a sequence table. What is new is that row based replication
  is now sequence aware:
   - NEXT VALUE is now generating a short row based event with only
     next_value and round being replicated.
   - Short row based events are now on the slave updated as trough
     SET_VALUE(sequence_name)
   - Full row based events are on the slave updated with a full insert,
     which is practically same as ALTER SEQUENCE.
- INSERT on a SEQUENCE table does now a EXCLUSIVE LOCK to ensure that
  it is logged in binary log before any following NEXT VALUE calls.
- Enable all sequence tests and fixed found bugs
- ALTER SEQUENCE doesn't anymore allow changes that makes the next_value
  outside of allowed range
- SEQUENCE changes are done with TL_WRITE_ALLOW_WRITE. Because of this
  one can generate a statement for MyISAM with both
  TL_WRITE_CONCURRENT_INSERT and TL_WRITE_ALLOW_WRITE. To fix a warning
  I had to add an extra test in thr_lock.c for this.
- Removed UPDATE of SEQUENCE (no need to support this as we
  have ALTER SEQUENCE, which takes the EXCLUSIVE lock properly.
- Removed DBUG_ASSERT() in MDL_context::upgrade_shared_lock. This was
  removed upstream in MySQL 5.6 in 72f823de453.
- Simplified test in decided_logging_format() by using sql_command_flags()
- Fix that we log DROP SEQUENCE correctly.
- Fixed that Aria works with SEQUENCE

1 files changed, 3 insertions, 2 deletions

diff --git a/sql/ha_sequence.h b/sql/ha_sequence.h
index f753d038114..c5a98c2a47b 100644
--- a/sql/ha_sequence.h
+++ b/sql/ha_sequence.h
@@ -69,9 +69,10 @@ public:
              HA_CREATE_INFO *create_info);
   handler *clone(const char *name, MEM_ROOT *mem_root);
   int write_row(uchar *buf);
-  int update_row(const uchar *old_data, const uchar *new_data);
   Table_flags table_flags() const;
-  /* One can't delete from sequence engine */
+  /* One can't update or delete from sequence engine */
+  int update_row(const uchar *old_data, const uchar *new_data)
+  { return HA_ERR_WRONG_COMMAND; }
   int delete_row(const uchar *buf)
   { return HA_ERR_WRONG_COMMAND; }
   /* One can't delete from sequence engine */