UDFs callable as void functions
Changed in: 2.0
Description: In Firebird 2.0 and above, PSQL code may call UDFs without assigning the result value, i.e. like a Pascal procedure or C void
function. In most cases this is senseless, because the main purpose of almost every UDF is to produce the result value. Some
functions however perform a specific task, and if you're not interested in the result value you can now spare yourself the
trouble of assigning it to a dummy variable.
Note
RDB$GET_CONTEXT
and RDB$SET_CONTEXT
, though classified in this guide under internal functions, are actually a kind of auto-declared UDFs. You may therefore call
them without catching the result. Of course this only makes sense for RDB$SET_CONTEXT
.