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removed a big warning on foreign keys

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Kenichi Ishigaki 2016-01-11 15:54:59 +09:00
parent c366b4d888
commit b71c5a6c7d
1 changed files with 5 additions and 10 deletions
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15
lib/DBD/SQLite.pm
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@ -1228,16 +1228,13 @@ named) placeholders to avoid confusion.
=head2 Foreign Keys =head2 Foreign Keys
B<BE PREPARED! WOLVES APPROACH!!>
SQLite has started supporting foreign key constraints since 3.6.19 SQLite has started supporting foreign key constraints since 3.6.19
(released on Oct 14, 2009; bundled in DBD::SQLite 1.26_05). (released on Oct 14, 2009; bundled in DBD::SQLite 1.26_05).
To be exact, SQLite has long been able to parse a schema with foreign To be exact, SQLite has long been able to parse a schema with foreign
keys, but the constraints has not been enforced. Now you can issue keys, but the constraints has not been enforced. Now you can issue
a pragma actually to enable this feature and enforce the constraints. a C<foreign_keys> pragma to enable this feature and enforce the
constraints, preferably as soon as you connect to a database and
To do this, issue the following pragma (see below), preferably as you're not in a transaction:
soon as you connect to a database and you're not in a transaction:
$dbh->do("PRAGMA foreign_keys = ON"); $dbh->do("PRAGMA foreign_keys = ON");
@ -1251,11 +1248,9 @@ SQLite team, and by us, to secure backward compatibility, as
this feature may break your applications, and actually broke this feature may break your applications, and actually broke
some for us. If you have used a schema with foreign key constraints some for us. If you have used a schema with foreign key constraints
but haven't cared them much and supposed they're always ignored for but haven't cared them much and supposed they're always ignored for
SQLite, be prepared, and B<please do extensive testing to ensure SQLite, be prepared, and please do extensive testing to ensure
that your applications will continue to work when the foreign keys that your applications will continue to work when the foreign keys
support is enabled by default>. It is very likely that the SQLite support is enabled by default.
team will turn it default-on in the future, and we plan to do it
NO LATER THAN they do so.
See L<http://www.sqlite.org/foreignkeys.html> for details. See L<http://www.sqlite.org/foreignkeys.html> for details.