Making DROP TABLE IF EXISTS, DROP DATABASE IF EXISTS, DELETE FROM, UPDATE be logged to

binlog even if they changed nothing, and a test for this.
This is useful when users use these commands to clean up their master and slave by issuing
one command on master (assume master and slave have slightly different data for some
reason and you want to clean up both).
Note that I have not changed multi-table DELETE and multi-table UPDATE because their
error-reporting mechanism is more complicated.


mysql-test/r/mysqlbinlog.result:
  result update
mysql-test/r/rpl_charset.result:
  result update
mysql-test/r/rpl_flush_log_loop.result:
  result update
mysql-test/r/rpl_replicate_do.result:
  result update
mysql-test/r/rpl_temporary.result:
  result update
mysql-test/t/mysqlbinlog.test:
  moving SET TIMESTAMP up as DROP shows up in binlog
sql/sql_db.cc:
  DROP DATABASE IF EXISTS is now always logged to binlog, even if db did not exist
sql/sql_delete.cc:
  DELETE FROM t is now always logged to binlog even if no rows deleted (but in this case, only if really no error).
sql/sql_table.cc:
  DROP TABLE IF EXISTS is now always logged to binlog even if table did not exist
sql/sql_update.cc:
  UPDATE is now always logged to binlog even if no rows updated (but in this case, only if really no error).

1 files changed, 31 insertions, 0 deletions

diff --git a/mysql-test/r/rpl_delete_all.result b/mysql-test/r/rpl_delete_all.result
new file mode 100644
index 00000000000..9966d73f3dd
--- /dev/null
+++ b/mysql-test/r/rpl_delete_all.result
@@ -0,0 +1,31 @@
+stop slave;
+drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
+reset master;
+reset slave;
+drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
+start slave;
+create database test1;
+drop database if exists test1;
+Warnings:
+Note	1008	Can't drop database 'test1'; database doesn't exist
+show tables from test1;
+ERROR HY000: Can't read dir of './test1/' (Errcode: 2)
+create table t1 (a int);
+drop table if exists t1;
+Warnings:
+Note	1051	Unknown table 't1'
+select * from t1;
+ERROR 42S02: Table 'test.t1' doesn't exist
+create table t1 (a int);
+insert into t1 values(1);
+delete from t1;
+select * from t1;
+a
+insert into t1 values(1);
+insert into t1 values(2);
+update t1 set a=2;
+select * from t1;
+a
+2
+2
+drop table t1;