Started a project that makes it possible to use 'normal' SQL like below in PHP scripts at Google App Engine.
sql("insert into demo (field1, field2) values(1, 'Yes it works')");
$rows = sql("select demo, field1, field2 from table order by demo desc");
sql("update demo set field1 = $field1 where demo = $demo");
sql("delete from demo where demo = $demo");
There is now a new version, see below blog postings about it.
pQg- Use SQL in PHP scripts at GAE
How to use pQg