Subject | Re: [firebird-support] Using a query parameter before a subquery |
---|---|
Author | Nando Dessena |
Post date | 2007-03-06T12:27:08Z |
Set,
S> I agree that this is an error. I tried a few things that failed at
S> prepare time:
S> select count(*)
S> from rdb$database
S> where :x < (select count(*) from rdb$database)
S> select count(*)
S> from rdb$database
S> where cast(:x as Integer) < (select count(*) from rdb$database)
S> And a few things that prepared without problems:
S> select count(*)
S> from rdb$database
S> where (select count(*) from rdb$database) > :x
S> select count(*)
S> from rdb$database
S> where :x < cast((select count(*) from rdb$database) as integer)
S> I was very surprised to learn that explicitly casting a select count(*)
S> to integer made the statement prepare, and that's what convinced me that
S> it is a small error.
S> I tried this on Firebird 1.5.2, I think (it might have been 1.5.3). I
S> haven't yet tried it on Firebird 2.0.
apparently none of them work on Fb 2.
Ciao
--
Nando Dessena
======================================================
I support Firebird, I am a Firebird Foundation member!
Join today at http://www.firebirdsql.org/ff/foundation
======================================================
S> I agree that this is an error. I tried a few things that failed at
S> prepare time:
S> select count(*)
S> from rdb$database
S> where :x < (select count(*) from rdb$database)
S> select count(*)
S> from rdb$database
S> where cast(:x as Integer) < (select count(*) from rdb$database)
S> And a few things that prepared without problems:
S> select count(*)
S> from rdb$database
S> where (select count(*) from rdb$database) > :x
S> select count(*)
S> from rdb$database
S> where :x < cast((select count(*) from rdb$database) as integer)
S> I was very surprised to learn that explicitly casting a select count(*)
S> to integer made the statement prepare, and that's what convinced me that
S> it is a small error.
S> I tried this on Firebird 1.5.2, I think (it might have been 1.5.3). I
S> haven't yet tried it on Firebird 2.0.
apparently none of them work on Fb 2.
Ciao
--
Nando Dessena
======================================================
I support Firebird, I am a Firebird Foundation member!
Join today at http://www.firebirdsql.org/ff/foundation
======================================================