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# (c) Sound Object Logic 2000-2001
use strict;
package Tangram::Sybase;
use vars qw(@ISA);
@ISA = qw( Tangram::Relational );
sub connect
{
shift;
Tangram::Sybase::Storage->connect( @_ )
}
use Tangram::Storage;
package Tangram::Sybase::Storage;
use vars qw(@ISA);
@ISA = qw( Tangram::Storage );
sub prepare
{
my ($self, $sql) = @_;
#print "prepare: $sql\n";
bless [ $self, $sql ], 'Tangram::Sybase::Statement';
}
*prepare_update = \*prepare;
*prepare_insert = \*prepare;
sub prepare_select
{
my ($self, $sql) = @_;
return $self->prepare($sql);
}
sub make_1st_id_in_tx
{
my ($self) = @_;
my $table = $self->{schema}{control};
$self->sql_do("UPDATE $table SET mark = mark + 1");
return $self->{db}->selectall_arrayref("SELECT mark from $table")->[0][0];
}
sub update_id_in_tx
{
my ($self, $mark) = @_;
$self->sql_do("UPDATE $self->{schema}{control} SET mark = $mark");
}
my %improved =
(
'Tangram::RawDateTime' => 'Tangram::Sybase::DateExpr',
'Tangram::RawDate' => 'Tangram::Sybase::DateExpr',
);
sub expr
{
my $self = shift;
my $type = shift;
my ($expr, @remotes) = @_;
# is $type related to dates? if not, return default
my $improved = $improved{ref($type)} or return $type->expr(@_);
# $type is a Date; return a DateExpr
return $improved->new($type, $expr, @remotes);
}
package Tangram::Sybase::Statement;
use constant STH => 2;
sub execute
{
my $self = shift;
my ($storage, $sql) = @$self;
my $sth = $self->[STH] = $storage->{db}->prepare($sql);
$sth->execute(@_);
# $dbh->do($sql, {}, @_);
}
sub fetchrow_array
{
my $self = shift;
return $self->[STH]->fetchrow_array();
}
sub finish
{
my $self = shift;
my $sth = pop @$self;
$sth->finish();
}
############################################
# derive a DateExpr class from existing Expr
package Tangram::Sybase::DateExpr;
use vars qw(@ISA);
@ISA = qw( Tangram::Expr );
############################
# add method datepart($part)
sub datepart
{
my ($self, $part) = @_; # $part is 'year', 'month', etc
my $expr = $self->expr(); # the SQL string for this Expr
##################################
# build a new Expr of Integer type
# pass this Expr's remote object list to the new Expr
return Tangram::Integer->expr("DATEPART($part, $expr)", $self->objects);
}
1;
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