Package org.exolab.castor.jdo
Interface OQLQuery
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- All Superinterfaces:
Query
- All Known Implementing Classes:
OQLQueryImpl
public interface OQLQuery extends Query
An OQL query object. Obtained from the database and used to construct and execute a query on that database. All query operations are bound to the database transaction. Closing the database or the transaction will effectively close the query.If the query specified parameters these parameters must be set (bound) before executing the query. Execution of the query will result in an enumeration of all the objects found by the query. The query can be re-executed by binding new parameters and calling the
Query.execute()
method a second time. A query can be re-execute while objects are still retrieved from a previous execution.For example:
Query oql; QueryResults results; // Construct a new query and bind the id value oql = db.getQuery( "SELECT ... WHERE id=$1" ); oql.bind( 5 ); results = oql.execute(); // Iterate over all the results and print them while ( results.hasMore() ) { System.out.println( results.next(); ); } results.close(); oql.close();
- Version:
- $Revision: 7091 $ $Date: 2004-10-01 14:44:12 -0600 (Fri, 01 Oct 2004) $
- Author:
- Assaf Arkin
- See Also:
Query
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description void
create(java.lang.String query)
Creates an OQL query from the supplied statement.
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Method Detail
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create
void create(java.lang.String query) throws PersistenceException
Creates an OQL query from the supplied statement.- Parameters:
query
- An OQL query statement- Throws:
PersistenceException
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