Clarify JDBC-defined negative values returned from batchUpdate

Closes gh-25138

Author: jhoeller

spring-jdbc/src/main/java/org/springframework/jdbc/core/JdbcOperations.java

@@ -896,6 +896,8 @@ <T> List<T> queryForList(String sql, Object[] args, int[] argTypes, Class<T> ele
 	 * @param pss object to set parameters on the PreparedStatement
 	 * created by this method
 	 * @return an array of the number of rows affected by each statement
+	 * (may also contain special JDBC-defined negative values for affected rows such as
+	 * {@link java.sql.Statement#SUCCESS_NO_INFO}/{@link java.sql.Statement#EXECUTE_FAILED})
 	 * @throws DataAccessException if there is any problem issuing the update
 	 */
 	int[] batchUpdate(String sql, BatchPreparedStatementSetter pss) throws DataAccessException;
@@ -905,6 +907,8 @@ <T> List<T> queryForList(String sql, Object[] args, int[] argTypes, Class<T> ele
 	 * @param sql the SQL statement to execute
 	 * @param batchArgs the List of Object arrays containing the batch of arguments for the query
 	 * @return an array containing the numbers of rows affected by each update in the batch
+	 * (may also contain special JDBC-defined negative values for affected rows such as
+	 * {@link java.sql.Statement#SUCCESS_NO_INFO}/{@link java.sql.Statement#EXECUTE_FAILED})
 	 * @throws DataAccessException if there is any problem issuing the update
 	 */
 	int[] batchUpdate(String sql, List<Object[]> batchArgs) throws DataAccessException;
@@ -916,20 +920,24 @@ <T> List<T> queryForList(String sql, Object[] args, int[] argTypes, Class<T> ele
 	 * @param argTypes the SQL types of the arguments
 	 * (constants from {@code java.sql.Types})
 	 * @return an array containing the numbers of rows affected by each update in the batch
+	 * (may also contain special JDBC-defined negative values for affected rows such as
+	 * {@link java.sql.Statement#SUCCESS_NO_INFO}/{@link java.sql.Statement#EXECUTE_FAILED})
 	 * @throws DataAccessException if there is any problem issuing the update
 	 */
 	int[] batchUpdate(String sql, List<Object[]> batchArgs, int[] argTypes) throws DataAccessException;
 
 	/**
-	 * Execute multiple batches using the supplied SQL statement with the collect of supplied arguments.
-	 * The arguments' values will be set using the ParameterizedPreparedStatementSetter.
+	 * Execute multiple batches using the supplied SQL statement with the collect of supplied
+	 * arguments. The arguments' values will be set using the ParameterizedPreparedStatementSetter.
 	 * Each batch should be of size indicated in 'batchSize'.
 	 * @param sql the SQL statement to execute.
 	 * @param batchArgs the List of Object arrays containing the batch of arguments for the query
 	 * @param batchSize batch size
 	 * @param pss the ParameterizedPreparedStatementSetter to use
-	 * @return an array containing for each batch another array containing the numbers of rows affected
-	 * by each update in the batch
+	 * @return an array containing for each batch another array containing the numbers of
+	 * rows affected by each update in the batch
+	 * (may also contain special JDBC-defined negative values for affected rows such as
+	 * {@link java.sql.Statement#SUCCESS_NO_INFO}/{@link java.sql.Statement#EXECUTE_FAILED})
 	 * @throws DataAccessException if there is any problem issuing the update
 	 * @since 3.1
 	 */

spring-jdbc/src/main/java/org/springframework/jdbc/core/namedparam/NamedParameterJdbcOperations.java

@@ -498,15 +498,20 @@ int update(String sql, SqlParameterSource paramSource, KeyHolder generatedKeyHol
 	 * @param sql the SQL statement to execute
 	 * @param batchValues the array of Maps containing the batch of arguments for the query
 	 * @return an array containing the numbers of rows affected by each update in the batch
+	 * (may also contain special JDBC-defined negative values for affected rows such as
+	 * {@link java.sql.Statement#SUCCESS_NO_INFO}/{@link java.sql.Statement#EXECUTE_FAILED})
 	 * @throws DataAccessException if there is any problem issuing the update
 	 */
 	int[] batchUpdate(String sql, Map<String, ?>[] batchValues);
 
 	/**
 	 * Execute a batch using the supplied SQL statement with the batch of supplied arguments.
 	 * @param sql the SQL statement to execute
-	 * @param batchArgs the array of {@link SqlParameterSource} containing the batch of arguments for the query
+	 * @param batchArgs the array of {@link SqlParameterSource} containing the batch of
+	 * arguments for the query
 	 * @return an array containing the numbers of rows affected by each update in the batch
+	 * (may also contain special JDBC-defined negative values for affected rows such as
+	 * {@link java.sql.Statement#SUCCESS_NO_INFO}/{@link java.sql.Statement#EXECUTE_FAILED})
 	 * @throws DataAccessException if there is any problem issuing the update
 	 */
 	int[] batchUpdate(String sql, SqlParameterSource[] batchArgs);