The Ultimate Guide to High Availability with MariaDB
This is a read-only copy of the MariaDB Knowledgebase generated on 2024-11-13. For the latest, interactive version please visit https://mariadb.com/kb/.

RAND_EVENT

The SQL function RAND() generates a random number.

A RAND_EVENT contains two seed values that set the rand_seed1 and rand_seed2 system variables that are used to compute the random number.

Note: it is written only before a QUERY_EVENT and is not used with row-based logging.

  • Event Type is 13 (0x0d)

Fields

  • uint<8> The value for the first seed
  • uint<8> The value for the second seed

Example From mysqlbinlog Utility, No CRC32

# at 389
#171206 13:46:56 server id 10116  end_log_pos 424 	Rand
SET @@RAND_SEED1=685157301, @@RAND_SEED2=758850369/*!*/;
# at 424

Example Event As It's Written In The Binlog File

 c0 e6 27 5a 0d 84 27 00 00 23 00 00 00 a8 01 00 ..'Z..'..#...... 00 00 00 b5 ab d6 28 00 00 00 00 41 23 3b 2d 00 ......(......... 00 00 00 ....

Content reproduced on this site is the property of its respective owners, and this content is not reviewed in advance by MariaDB. The views, information and opinions expressed by this content do not necessarily represent those of MariaDB or any other party.