Use inline SVG for relation graphs

The graphs are now stored in the DB in SVG format, the static/rg/
directory can be removed (not used anymore).

SVG data is stored using the xml data type, so now I can say for
sure you'd need at least PostgreSQL 8.3.

This feature still needs some tweaking, though. Current state isn't
perfect.

2 files changed, 17 insertions, 1 deletions

diff --git a/util/init.pl b/util/init.pl
index 5c171705..ac533174 100755
--- a/util/init.pl
+++ b/util/init.pl
@@ -22,7 +22,7 @@ print "\n";
 
 
 print "Creating directory structures...\n";
-for my $d (qw| cv rg st sf |) {
+for my $d (qw| cv st sf |) {
   print "  /static/$d\n";
   mkdir "$ROOT/static/$d" or die "mkdir '$ROOT/static/$d': $!\n";
   for my $i (0..99) {
diff --git a/util/updates/update_2.8.sql b/util/updates/update_2.8.sql
new file mode 100644
index 00000000..a48c1e73
--- /dev/null
+++ b/util/updates/update_2.8.sql
@@ -0,0 +1,16 @@
+
+-- !BEFORE! running this SQL file, make sure to kill Multi,
+-- After running this SQL file, also make sure to do a:
+--  $ rm -r static/rg/
+-- And start multi again
+
+-- VN Relation graphs are stored in the database as SVG - no cmaps and .png anymore
+UPDATE vn SET rgraph = NULL;
+ALTER TABLE vn DROP CONSTRAINT vn_rgraph_fkey;
+DROP TABLE relgraph;
+CREATE TABLE vn_graphs (
+  id SERIAL PRIMARY KEY,
+  svg xml NOT NULL
+);
+ALTER TABLE vn ADD FOREIGN KEY (rgraph) REFERENCES vn_graphs (id);
+