NAME
DBIx::Class::Storage::DBI::ODBC::Microsoft_SQL_Server - Support specific to Microsoft SQL Server over ODBC
DESCRIPTION
This class implements support specific to Microsoft SQL Server over ODBC. It is loaded automatically by by DBIx::Class::Storage::DBI::ODBC when it detects a MSSQL back-end.
Most of the functionality is provided from the superclass DBIx::Class::Storage::DBI::MSSQL.
MULTIPLE ACTIVE STATEMENTS
The following options are alternative ways to enable concurrent executing statement support. Each has its own advantages and drawbacks.
connect_call_use_dynamic_cursors
Use as:
on_connect_call => 'use_dynamic_cursors'in your "connect_info" in DBIx::Class::Storage::DBI as one way to enable multiple concurrent statements.
Will add odbc_cursortype => 2 to your DBI connection attributes. See "odbc_cursortype" in DBD::ODBC for more information.
Alternatively, you can add it yourself and dynamic cursor support will be automatically enabled.
If you're using FreeTDS, tds_version must be set to at least 8.0.
This will not work with CODE ref connect_info's.
WARNING: this will break SCOPE_IDENTITY(), and SELECT @@IDENTITY will be used instead, which on SQL Server 2005 and later will return erroneous results on tables which have an on insert trigger that inserts into another table with an IDENTITY column.
connect_call_use_server_cursors
Use as:
on_connect_call => 'use_server_cursors'May allow multiple active select statements. See "odbc_SQL_ROWSET_SIZE" in DBD::ODBC for more information.
Takes an optional parameter for the value to set the attribute to, default is 2.
WARNING: this does not work on all versions of SQL Server, and may lock up your database!
connect_call_use_MARS
Use as:
on_connect_call => 'use_MARS'Use to enable a feature of SQL Server 2005 and later, "Multiple Active Result Sets". See "Does DBD::ODBC support Multiple Active Statements?" in DBD::ODBC::FAQ for more information.
WARNING: This has implications for the way transactions are handled.
AUTHOR
See "CONTRIBUTORS" in DBIx::Class.
LICENSE
You may distribute this code under the same terms as Perl itself.