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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" DBIx::Class::Storage::DBI::ADO::Microsoft_SQL_Server \- Support for Microsoft SQL Server via DBD::ADO .SH "SYNOPSIS" .IX Header "SYNOPSIS" This subclass supports \s-1MSSQL\s0 server connections via \s-1DBD::ADO\s0. .SH "DESCRIPTION" .IX Header "DESCRIPTION" The \s-1MSSQL\s0 specific functionality is provided by DBIx::Class::Storage::DBI::MSSQL. .SH "EXAMPLE DSN" .IX Header "EXAMPLE DSN" .Vb 1 \& dbi:ADO:provider=sqlncli10;server=EEEBOX\eSQLEXPRESS .Ve .SH "CAVEATS" .IX Header "CAVEATS" .SS "identities" .IX Subsection "identities" \&\f(CW\*(C`_identity_method\*(C'\fR is set to \f(CW@@identity\fR, as \f(CW\*(C`SCOPE_IDENTITY()\*(C'\fR doesn't work with \s-1DBD::ADO\s0. See \*(L"\s-1IMPLEMENTATION NOTES\*(R"\s0 in DBIx::Class::Storage::DBI::MSSQL for caveats regarding this. .SS "truncation bug" .IX Subsection "truncation bug" There is a bug with \s-1MSSQL ADO\s0 providers where data gets truncated based on the size of the bind sizes in the first prepare call: .PP .PP The \f(CW\*(C`ado_size\*(C'\fR workaround is used (see \*(L"\s-1ADO\s0 providers\*(R" in \s-1DBD::ADO\s0) with the approximate maximum size of the data_type of the bound column, or 8000 (maximum \&\s-1VARCHAR\s0 size) if the data_type is not available. .PP Please report problems with this driver and send patches. .SS "LongReadLen" .IX Subsection "LongReadLen" \&\f(CW\*(C`LongReadLen\*(C'\fR is set to \f(CW\*(C`LongReadLen * 2 + 1\*(C'\fR on connection as it is necessary for some \s-1LOB\s0 types. Be aware of this if you localize this value on the \f(CW$dbh\fR directly. .SS "binary data" .IX Subsection "binary data" Due perhaps to the ado_size workaround we use, and/or other reasons, binary data such as \f(CW\*(C`varbinary\*(C'\fR column data comes back padded with trailing \f(CW\*(C`NULL\*(C'\fR 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 \f(CW\*(C`NULL\*(C'\fR padded that may be an issue to keep in mind when using this driver. .SS "uniqueidentifier columns" .IX Subsection "uniqueidentifier columns" uniqueidentifier columns come back from \s-1ADO\s0 wrapped in braces and must be submitted to the \s-1MSSQL ADO\s0 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 \s-1SQL,\s0 in those cases you will have to add the braces yourself.) .SS "fractional seconds" .IX Subsection "fractional seconds" Fractional seconds with DBIx::Class::InflateColumn::DateTime are not currently supported, datetimes are truncated at the second. .SH "FURTHER QUESTIONS?" .IX Header "FURTHER QUESTIONS?" Check the list of additional \s-1DBIC\s0 resources. .SH "COPYRIGHT AND LICENSE" .IX Header "COPYRIGHT AND LICENSE" This module is free software copyright by the DBIx::Class (\s-1DBIC\s0) authors. You can redistribute it and/or modify it under the same terms as the DBIx::Class library.