Google App Engine: Queries as an SQL “LIKE”

Introduction:

When i have developed my first GAE application, i wanted to use a request with a “LIKE” to find all tuples beginning with a prefix.
GQLQuery does not allow this kind of SQL request (SELECT * FROM user where name LIKE ‘SMIT%’).
The solution is to use this kind of request:

query = self.request.str_POST['query']
queryEnd = query+"\xEF\xBF\xBD".decode('utf-8')
res=db.GqlQuery('SELECT * FROM User WHERE name>=:1 AND name<=:2 ORDER BY nom DESC', query, queryEnd)

I was obliged to modify the sample code provided by the documentation (here)
queryEnd = query+"\xEF\xBF\xBD".decode('utf-8') was added.

Thanks a lot to José Oliver Segura for his support.

Information can be found here