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add Query.getResultCount() #660

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add Query.getResultCount() #660

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19 changes: 19 additions & 0 deletions api/src/main/java/jakarta/persistence/Query.java
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@
*/

// Contributors:
// Gavin King - 4.0
// Gavin King - 3.2
// Lukas Jungmann - 2.2
// Linda DeMichiel - 2.1
Expand Down Expand Up @@ -61,6 +62,24 @@ public interface Query {
@SuppressWarnings({"rawtypes"})
List getResultList();

/**
* Determine the size of the query result list that would be
* returned by calling {@link #getResultList()} with no
* {@linkplain #getFirstResult() offset} or
* {@linkplain #getMaxResults() limit} applied to the query.
* @return the size of the list that would be returned
* @throws IllegalStateException if called for a Jakarta
* Persistence query language UPDATE or DELETE statement
* @throws QueryTimeoutException if the query execution exceeds
* the query timeout value set and only the statement is
* rolled back
* @throws PersistenceException if the query execution exceeds
* the query timeout value set and the transaction
* is rolled back
* @since 4.0
*/
long getResultCount();

/**
* Execute a SELECT query and return the query results as an untyped
* {@link java.util.stream.Stream}.
Expand Down