PostgreSQL 中的查询错误没有返回任何结果

Question

I am trying to insert a data into a table. After executing the query i am getting an exception stating

org.postgresql.util.PSQLException: No results were returned by the query.
org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:284)

The data is getting inserted successfully, but i have no idea why i am getting this exception ??

Answer 1

Use

executeUpdate

instead of

executeQuery

if no data will be returned (ie a non- SELECT operation).

Answer 2

Please use annotion over the annotion.

@Modifying
@Query(value = "UPDATE Users set coins_balance = coins_balance + :coinsToAddOrRemove where user_id = :user_id", nativeQuery = true)
    int updateCoinsBalance(@Param("user_id") Long userId, @Param("coinsToAddOrRemove") Integer coinsToAddOrRemove);

The same is true for any DML query (ie DELETE, UPDATE or INSERT)

Answer 3

使用 @Modifying 和 @Transaction 修复了我

Answer 4

If you want last generated id, you can use this code after using executeUpdate() method

 int update = statement.executeUpdate()
 ResultSet rs = statement.getGeneratedKeys();
 if (rs != null && rs.next()) {
  key = rs.getLong(1);
 }

Answer 5

The problem that brought me to this question was a bit different - I was getting this error when deleting rows using an interface-based Spring JPA Repository. The cause was that my method signature was supposed to return some results:

@Modifying
@Query(value = "DELETE FROM table t WHERE t.some_id IN (:someIds)", nativeQuery = true)
List<Long> deleteBySomeIdIn(@Param("someIds") Collection<Long> someIds);

Changing the return type to void resolved the issue:

@Modifying
@Query(value = "DELETE FROM table t WHERE t.some_id IN (:someIds)", nativeQuery = true)
void deleteBySomeIdIn(@Param("someIds") Collection<Long> someIds);

Answer 6

I have solved this Problem using addBatch and executeBatch as following:

statement.addBatch("DELETE FROM public.session_event WHERE id = " + entry.getKey());
statement.executeBatch();