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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=.}                                          ....
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