PostgreSQL/String Functions/set byte

set_byte(string, offset, newvalue)

postgres=#
postgres=# -- set_byte(string, offset, newvalue)
postgres=# -- Set byte in string
postgres=#
postgres=# select set_byte("Th\\000omas"::bytea, 4, 64);
  set_byte
------------
 Th\000o@as
(1 row)
postgres=#
postgres=#