USER_VAR_EVENT

A USER_VAR_EVENT is written every time a statement uses a user defined variable.

  • Event Type is 14 (0x0e)

Fields

Variable type

ValueTypeExample
0x00STRING_RESULTset @a:="foo"
0x01REAL_RESULTset @a:= @@timestamp
0x02INT_RESULTset @a:= 4
0x03ROW_RESULT(not in use)
0x04DECIMAL_RESULTset @a:=1.2345

Flag

0x01unsigned

Example for SET @foo:="bar"from mysqlbinlog Utility, CRC32

# at 511
#180610 10:26:43 server id 1  end_log_pos 554 CRC32 0x7dd93d6b 	User_var
SET @`foo`:=_utf8 X'626172' COLLATE `utf8_general_ci`/*!*/;

Example Event As It's Written In The Binlog File

               c3 e0 1c 5b 0e 01 00 00 00 2b 00       ...[.....+.
00 00 2a 02 00 00 00 00 03 00 00 00 66 6f 6f 00  ..*.........foo.
00 21 00 00 00 03 00 00 00 62 61 72 6b 3d d9 7d  .!.......bark=.}                                          ....

Comments

Comments loading...
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.