From: Peter Rabbitson <ribasushi@cpan.org>
Date: Thu, 12 Nov 2009 10:15:12 +0000 (+0000)
Subject: Clarifying comment
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=0be369b018944236e65ac1d93edf60ae251b791c;p=dbsrgits%2FDBIx-Class-Historic.git

Clarifying comment
---

diff --git a/lib/DBIx/Class/Storage/DBI.pm b/lib/DBIx/Class/Storage/DBI.pm
index e8c9bb2..2df9d59 100644
--- a/lib/DBIx/Class/Storage/DBI.pm
+++ b/lib/DBIx/Class/Storage/DBI.pm
@@ -1567,6 +1567,14 @@ sub delete {
   return $self->_execute('delete' => [], $source, $bind_attrs, $where, @args);
 }
 
+# Most databases do not allow aliasing of tables in UPDATE/DELETE. Thus
+# a condition containing 'me' or other table prefixes will not work
+# at all. Since we employ subqueries when multiple tables are involved
+# (joins), it is relatively safe to strip all column qualifiers. Worst
+# case scenario the error message will be a bit misleading, if the
+# user supplies a foreign qualifier without a join (the message would
+# be "can't find column X", when in fact the user shoud join T containing
+# T.X)
 sub _strip_cond_qualifiers {
   my ($self, $where) = @_;