Mysql UDF to add a clone of NOW() that return microseconds
After installing it, just execute in the mysql shell:
CREATE FUNCTION microsecnow RETURNS INTEGER SONAME 'microsecnow.so';
and the you can do:
mysql> SELECT MICROSECNOW();
+------------------+
| MICROSECNOW() |
+------------------+
| 1393634420837085 |
+------------------+
1 row in set (0.00 sec)
mysql>