--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/django/db/backends/postgresql/version.py	Wed Jan 20 00:34:04 2010 +0100
@@ -0,0 +1,31 @@
+"""
+Extracts the version of the PostgreSQL server.
+"""
+
+import re
+
+# This reg-exp is intentionally fairly flexible here.
+# Needs to be able to handle stuff like:
+#   PostgreSQL 8.3.6
+#   EnterpriseDB 8.3
+#   PostgreSQL 8.3 beta4
+#   PostgreSQL 8.4beta1
+VERSION_RE = re.compile(r'\S+ (\d+)\.(\d+)\.?(\d+)?')
+
+def _parse_version(text):
+    "Internal parsing method. Factored out for testing purposes."
+    major, major2, minor = VERSION_RE.search(text).groups()
+    try:
+        return int(major), int(major2), int(minor)
+    except (ValueError, TypeError):
+        return int(major), int(major2), None
+
+def get_version(cursor):
+    """
+    Returns a tuple representing the major, minor and revision number of the
+    server. For example, (7, 4, 1) or (8, 3, 4). The revision number will be
+    None in the case of initial releases (e.g., 'PostgreSQL 8.3') or in the
+    case of beta and prereleases ('PostgreSQL 8.4beta1').
+    """
+    cursor.execute("SELECT version()")
+    return _parse_version(cursor.fetchone()[0])