DBIx::Class::Storage::UDBIx::Class::Storage::DBI::ADO::Microsoft_SQL_Server(3)NAMEDBIx::Class::Storage::DBI::ADO::Microsoft_SQL_Server - Support for
Microsoft SQL Server via DBD::ADO
SYNOPSIS
This subclass supports MSSQL server connections via DBD::ADO.
DESCRIPTION
The MSSQL specific functionality is provided by
DBIx::Class::Storage::DBI::MSSQL.
EXAMPLE DSN
dbi:ADO:provider=sqlncli10;server=EEEBOX\SQLEXPRESS
CAVEATS
identities
"_identity_method" is set to @@identity, as "SCOPE_IDENTITY()" doesn't
work with DBD::ADO. See "IMPLEMENTATION NOTES" in
DBIx::Class::Storage::DBI::MSSQL for caveats regarding this.
truncation bug
There is a bug with MSSQL ADO providers where data gets truncated based
on the size of the bind sizes in the first prepare call:
<https://rt.cpan.org/Ticket/Display.html?id=52048>
The "ado_size" workaround is used (see "ADO Providers" in DBD::ADO)
with the approximate maximum size of the data_type of the bound column,
or 8000 (maximum VARCHAR size) if the data_type is not available.
Please report problems with this driver and send patches.
LongReadLen
"LongReadLen" is set to "LongReadLen * 2 + 1" on connection as it is
necessary for some LOB types. Be aware of this if you localize this
value on the $dbh directly.
binary data
Due perhaps to the ado_size workaround we use, and/or other reasons,
binary data such as "varbinary" column data comes back padded with
trailing "NULL" chars. The Cursor class for this driver
(DBIx::Class::Storage::DBI::ADO::Microsoft_SQL_Server::Cursor) removes
them, of course if your binary data is actually "NULL" padded that may
be an issue to keep in mind when using this driver.
uniqueidentifier columns
uniqueidentifier columns come back from ADO wrapped in braces and must
be submitted to the MSSQL ADO driver wrapped in braces. We take care of
this transparently in this driver and the associated Cursor class
(DBIx::Class::Storage::DBI::ADO::Microsoft_SQL_Server::Cursor) so that
you don't have to use braces in most cases (except in literal SQL, in
those cases you will have to add the braces yourself.)
fractional seconds
Fractional seconds with DBIx::Class::InflateColumn::DateTime are not
currently supported, datetimes are truncated at the second.
AUTHOR
See "AUTHOR" in DBIx::Class and "CONTRIBUTORS" in DBIx::Class.
LICENSE
You may distribute this code under the same terms as Perl itself.
perl v5.16.2DBIx::Class::Storage::DBI::ADO::Microsoft_SQL_Server(3)