1 files changed, 32 insertions, 0 deletions
diff --git a/databases/msql/scripts/check_old_version b/databases/msql/scripts/check_old_version
new file mode 100644
index 000000000000..ea046b99543f
--- /dev/null
+++ b/databases/msql/scripts/check_old_version
@@ -0,0 +1,32 @@
+#!/usr/bin/perl
+#
+# $Id$
+#
+
+if( -d "/var/db/msqldb" ) {
+	chdir( "/var/db/pkg" );
+	opendir( DIR, "." );
+	@oldmsql = grep( /^msql-2.0b[1234]$/, readdir( DIR ) );
+	closedir;
+	if( @oldmsql ) {
+		if( ! $ENV{OVERWRITE_DB} ) {
+			print <<END;
+
+mSQL v2.0 beta 5 and above make changes to the AVL index format of your
+databases.  In order to preserve your existing data, you must:
+	- use msqldump to dump all your databases
+	- install beta 5 or above
+	- use msqladmin to drop and then create each of your databases
+	- use msql to reload your data
+
+If you understand the consequences of this upgrade, please re-build this
+port with the environment variable OVERWRITE_DB defined.
+
+END
+			exit 1;
+		}
+	}
+}
+
+#
+# EOF