#453 Added PostgreSQL initial db scripts (User) (#556)

* PostgreSQL initial commit of translation from SQL Server to PostgreSQL

* snake_case added.
set search path for schema.  schema qualified name no longer needed for creation and access of functions.

* Table DDL for PostgreSQL

src/Sql/PostgreSQL/Functions/user_read_by_id.sql

@@ -1,14 +1,20 @@
+DROP FUNCTION IF EXISTS user_read_by_id;
+
 CREATE OR REPLACE FUNCTION user_read_by_id
 (
-    id uuid
+    _id uuid
 )
 RETURNS SETOF "user"
-LANGUAGE 'sql'
-AS $BODY$
+LANGUAGE 'plpgsql'
+AS 
+$BODY$
+BEGIN
+    RETURN QUERY
     SELECT
         *
     FROM
         "user"
     WHERE
-        "id" = id;
+        "id" = _id;
+END
 $BODY$;