Parser for handling JPQL Single-String queries.
Takes a JPQLQuery and the query string and parses it into its constituent parts, updating
the JPQLQuery accordingly with the result that after calling the parse() method the JPQLQuery
is populated.
SELECT [ {result} ]
[FROM {candidate-classes} ]
[WHERE {filter}]
[GROUP BY {grouping-clause} ]
[HAVING {having-clause} ]
[ORDER BY {ordering-clause}]
e.g SELECT c FROM Customer c INNER JOIN c.orders o WHERE c.status = 1
or
UPDATE {update-clause}
WHERE {filter}
and update-clause is of the form
"Entity [[AS] identifier] SET {field = new_value}, ..."
or
DELETE {delete-clause}
WHERE {filter}
and delete-clause is of the form
"FROM Entity [[AS] identifier]"
Note that {filter} and {having-clause} can contain subqueries, hence containing keywords
SELECT c FROM Customer c WHERE NOT EXISTS (SELECT o1 FROM c.orders o1)
So the "filter" for the outer query is "NOT EXISTS (SELECT o1 FROM c.orders o1)"
version:
$Revision: 1.5 $ | 