--- a/plugins/mod_storage_sql2.lua	Sun Nov 10 23:10:46 2013 +0000
+++ b/plugins/mod_storage_sql2.lua	Mon Nov 11 23:28:53 2013 +0100
@@ -44,7 +44,7 @@
 
 	local ProsodyArchiveTable = Table {
 		name="prosodyarchive";
-		Column { name="sort_id", type="INTEGER", primary_key=true, auto_increment=true, nullable=false };
+		Column { name="sort_id", type="INTEGER", primary_key=true, auto_increment=true };
 		Column { name="host", type="TEXT", nullable=false };
 		Column { name="user", type="TEXT", nullable=false };
 		Column { name="store", type="TEXT", nullable=false };

--- a/util/sql.lua	Sun Nov 10 23:10:46 2013 +0000
+++ b/util/sql.lua	Mon Nov 11 23:28:53 2013 +0100
@@ -264,13 +264,14 @@
 		if col_type == "MEDIUMTEXT" and self.params.driver ~= "MySQL" then
 			col_type = "TEXT"; -- MEDIUMTEXT is MySQL-specific
 		end
+		if col.auto_increment == true and self.params.driver == "PostgreSQL" then
+			col_type = "BIGSERIAL";
+		end
 		sql = sql.."`"..col.name.."` "..col_type;
 		if col.nullable == false then sql = sql.." NOT NULL"; end
 		if col.primary_key == true then sql = sql.." PRIMARY KEY"; end
 		if col.auto_increment == true then
-			if self.params.driver == "PostgreSQL" then
-				sql = sql.." SERIAL";
-			elseif self.params.driver == "MySQL" then
+			if self.params.driver == "MySQL" then
 				sql = sql.." AUTO_INCREMENT";
 			elseif self.params.driver == "SQLite3" then
 				sql = sql.." AUTOINCREMENT";