Re: Statement handle still Active: prepare_cached



On Tue, Mar 25, 2008 at 09:31:30AM +0100, Mark Lawrence wrote:
I'm having a problem with one of my modules (SQL::DB) failing on
calls to prepare_cached. I'm asking here for help because this is
failing on every CPAN Tester's build, but I can't repeat the issue
locally (x86_64 Debian). The tests use SQLite for the database.

The error is occuring on INSERT and UPDATE statements:

t/09-db...........prepare_cached(INSERT INTO
sqldb (name, val)
VALUES
(?, ?)
) statement handle DBI::st=HASH(0xdf1cd8) still Active at ...

As far as I know I am not nesting calls to the same statement. But even
if I was, what I don't understand is how an INSERT or UPDATE statement
handle remains active after the database call. According to the pod:

"Active" (boolean, read-only)

The "Active" attribute is true if the handle object is "active". This
is rarely used in applications. The exact meaning of active is somewhat
vague at the moment. For a database handle it typically means that the
handle is connected to a database ("$dbh->disconnect" sets "Active"
off). For a statement handle it typically means that the handle is a
"SELECT" that may have more data to fetch. (Fetching all the data or
calling "$sth->finish" sets "Active" off.)

I know about the $if_active option to prepare_cached, but I would rather
get the warnings and I don't want new statement handles added to the
cache for what I believe is the same statement.

You're right that INSERT or UPDATE statements shouldn't have Active set.
I'd start by trying to understand how/why/where that's happening.

I have other question: The call to prepare_cached is happening
inside two eval{} blocks, yet the error message above doesn't come from
my code but instead from DBI.

I'm not quite sure what you're saying here, but the warning is generated
by prepare_cached() in DBI.pm using carp().

I'm also really curious why I can't repeat
this behavour on my machine, but *every* CPAN tester sees this result.

There's always an answer, you just have to dig deep enough to find it.
Perhaps you're using a different version of some key module(s), like
DBD::SQLite.

Tim.
.



Relevant Pages

  • Re: Statement handle still Active: prepare_cached
    ... The tests use SQLite for the database. ... get the warnings and I don't want new statement handles added to the ... You're right that INSERT or UPDATE statements shouldn't have Active set. ... version 0.12 is now on CPAN. ...
    (perl.dbi.users)
  • Statement handle still Active: prepare_cached
    ... I'm having a problem with one of my modules failing on ... The tests use SQLite for the database. ... The error is occuring on INSERT and UPDATE statements: ... but *every* CPAN tester sees this result. ...
    (perl.dbi.users)
  • Re: Perl DBI
    ... > Doesn't the following command install the latest version of Perl DBI: ... I personally use the CPAN shell to install modules - but, ... > machine and I have a MS Access database on the Windows partition (which ...
    (comp.lang.perl.misc)
  • DBIx::Migration::Directories version 0.07 failing tests
    ... Fetching with LWP: ... CPAN: Digest::SHA loaded ok ... User to connect to the database as ...
    (comp.lang.perl.modules)
  • Re: Northwind ReportsTo NULL ComboBox
    ... concerned about SELECT or UPDATE statements. ... although in fact it does come from a database. ... Updating the data source is a separate issue ... > Values" in SQL Server Books Online for more information. ...
    (microsoft.public.dotnet.framework.adonet)