Firebird 2.1 Language Reference Update

DDL statements
got a chance to put things right. In Firebird 2.0 and up this is no longer the case: provided the right trigger is
in place, such views are now insertable.
Example:
Notes:
The view below would give validation errors for any insert attempts in Firebird 1.5 and earlier. In
Firebird 2.0 and up it is insertable:
create table base (x int not null, y int not null);
create view vbase as select x from base;
set term #;
create trigger bi_base for vbase before insert
as
begin
if (new.x is null) then new.x = 33;
insert into base values (new.x, 0);
end#
set term ;#
• Please notice that the problem described above only occurred for NOT NULL columns that were left outside
the view.
• Oddly enough, the problem would be gone if the base table itself had a trigger converting NULL input to
something valid. But then there was a risk that the insert would take place twice, due to the auto-writethrough
bug that has also been fixed in Firebird 2.
RECREATE VIEW
Available in: DSQL
Added in: 1.5
Description: Creates or recreates a view. If a view with the same name already exists, RECREATE VIEW will
try to drop it and create a new view. RECREATE VIEW will fail if the existing view is in use.
Syntax: Exactly the same as CREATE VIEW.
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