Firebird 2.1 Language Reference Update

Chapter 8
PSQL statements
PSQL – Procedural SQL – is the Firebird stored procedure and trigger language.
Available in: PSQL
Changed in: 1.5
BEGIN ... END blocks may be empty
Description: BEGIN ... END blocks may be empty in Firebird 1.5 and up, allowing you to write stub code without
having to resort to dummy statements.
Example:
create trigger bi_atable for atable
active before insert position 0
as
begin
end
Available in: PSQL
Added in: 1.0
Better alternative: LEAVE
BREAK
Description: BREAK immediately terminates a WHILE or FOR loop and continues with the first statement after
the loop.
Example:
create procedure selphrase(num int)
returns (phrase varchar(40))
as
begin
for select Phr from Phrases into phrase do
begin
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