Examples of org.jpox.store.query.JPQLSingleStringParser

• org.jpox.store.query.JPQLSingleStringParser
  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 $

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