From: Matt S Trout <mst@shadowcat.co.uk>
Date: Sat, 1 Aug 2009 20:35:37 +0000 (-0400)
Subject: sketch of view generation code
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=d7749fb3699ece8287a1232cf357b58b012d609e;p=dbsrgits%2FDBIx-Class-ResultSource-MultipleTableInheritance.git

sketch of view generation code
---

diff --git a/vdef b/vdef
new file mode 100644
index 0000000..b097bcc
--- /dev/null
+++ b/vdef
@@ -0,0 +1,58 @@
+sub argify (@cols) {
+  map $_->new(%$_, name => '_'.$_->name), @cols;
+}
+
+sub body_cols ($source) {
+  grep $_->name ne 'id', $source->all_cols;
+}
+
+my @pk_col = ($table->col('id'));
+
+my @sources = grep defined, $table, $super_view;
+
+my @body_cols = map body_cols($_), @sources;
+
+CREATE VIEW $view_name =>
+  SELECT {
+    (map $_->qualify, @pk_col),
+    @body_cols,
+  } FROM {
+    $super_view ? ($table->join($super_view)->using(@pk_col)) : $table
+  };
+
+my ($now, $next) = grep defined, $super_view, $table;
+
+CREATE FUNCTION "${view_name}_insert" =>
+  (argify @body_cols)
+  => RETURNS VOID => AS {
+    INSERT INTO { $now } (body_cols $now)
+      => VALUES (argify body_cols $now);
+    if ($next) {
+      INSERT INTO { $next } ($next->all_cols)
+        => VALUES {
+             $root_table->col('id')->sequence->currval,
+             argify body_cols $next
+           };
+    }
+  };
+
+my $pk_eq = AND( map (expr { $_ == argify $_ }), @pk_col);
+
+CREATE FUNCTION "${view_name}_update" =>
+  (argify @pk_col, @body_cols)
+  => RETURNS VOID => AS {
+    foreach my $s (@sources) {
+      UPDATE { $s } SET { map ($_ => argify $_), body_cols $s }
+        WHERE { $pk_eq };
+    }
+  };
+
+CREATE FUNCTION "${view_name}_delete" =>
+  (argify @pk_col)
+  => RETURNS VOID => AS {
+    foreach my $s (@sources) {
+      DELETE FROM { $s } WHERE { $pk_eq };
+    }
+  };
+
+