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Comparing PApp-SQL/SQL.pm (file contents):
Revision 1.3 by root, Sun Nov 5 01:54:38 2000 UTC vs.
Revision 1.6 by root, Sun Jan 7 02:53:53 2001 UTC

… …
24#use PApp::Exception; # not yet used 24#use PApp::Exception; # not yet used
25 25
26BEGIN { 26BEGIN {
27 use base Exporter; 27 use base Exporter;
28 28
29 $VERSION = 0.1; 29 $VERSION = 0.11;
30 @EXPORT = qw( 30 @EXPORT = qw(
31 sql_exec sql_fetch sql_fetchall sql_exists sql_insertid $sql_exec 31 sql_exec sql_fetch sql_fetchall sql_exists sql_insertid $sql_exec
32 ); 32 );
33 @EXPORT_OK = qw( 33 @EXPORT_OK = qw(
34 connect_cached 34 connect_cached
… …
50 50
51Connect to the database given by C<($dsn,$user,$pass)>, while using the 51Connect to the database given by C<($dsn,$user,$pass)>, while using the
52flags from C<$flags>. These are just the same arguments as given to 52flags from C<$flags>. These are just the same arguments as given to
53C<DBI->connect>. 53C<DBI->connect>.
54 54
55The database handle will be cached under the unique id C<$id>. If the same 55The database handle will be cached under the unique id
56id is requested later, the cached handle will be checked (using ping), and 56C<$id|$dsn|$user|$pass>. If the same id is requested later, the
57cached handle will be checked (using ping), and the connection will
57the connection will be re-established if necessary (be sure to prefix your 58be re-established if necessary (be sure to prefix your application or
58application or module name to the id to make it "more" unique. Things like 59module name to the id to make it "more" unique. Things like __PACKAGE__ .
59__PACKAGE__ . __LINE__ work fine as well). 60__LINE__ work fine as well).
61
62The reason C<$id> is necessary is that you might specify special connect
63arguments or special flags, or you might want to configure your $DBH
64differently than maybe other applications requesting the same database
65connection. If none of this is becessary for your application you can
66leave $id empty (i.e. "").
60 67
61If specified, C<$connect> is a callback (e.g. a coderef) that will be 68If specified, C<$connect> is a callback (e.g. a coderef) that will be
62called each time a new connection is being established, with the new 69called each time a new connection is being established, with the new
63C<$dbh> as first argument. 70C<$dbh> as first argument.
64 71
… …
73 my ($id, $dsn, $user, $pass, $flags, $connect) = @_; 80 my ($id, $dsn, $user, $pass, $flags, $connect) = @_;
74 # the following line is duplicated in PApp::SQL::Database::new 81 # the following line is duplicated in PApp::SQL::Database::new
75 $id = "$id\0$dsn\0$user\0$pass"; 82 $id = "$id\0$dsn\0$user\0$pass";
76 unless ($dbcache{$id} && $dbcache{$id}->ping) { 83 unless ($dbcache{$id} && $dbcache{$id}->ping) {
77 #warn "connecting to ($dsn|$user|$pass|$flags)\n";#d# 84 #warn "connecting to ($dsn|$user|$pass|$flags)\n";#d#
78 # first, nuke our cache (sooory ;) 85 # first, nuke our statement cache (sooory ;)
79 cachesize cachesize 0; 86 cachesize cachesize 0;
80 # then connect anew 87 # then connect anew
81 $dbcache{$id} = 88 $dbcache{$id} =
82 eval { DBI->connect($dsn, $user, $pass, $flags) } 89 eval { DBI->connect($dsn, $user, $pass, $flags) }
83 || eval { DBI->connect($dsn, $user, $pass, $flags) } 90 || eval { DBI->connect($dsn, $user, $pass, $flags) }
84 || die "$DBI::errstr\n"; 91 || die "unable to connect to database $dsn: $DBI::errstr\n";
85 $connect->($dbcache{$id}) if $connect; 92 $connect->($dbcache{$id}) if $connect;
86 } 93 }
87 $dbcache{$id}; 94 $dbcache{$id};
88} 95}
89 96

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