I tried to write a query method in my repository similar to this
@Modifying
@Query("UPDATE foo SET some_timestamp = :someTimestamp WHERE id = :id")
void updateSomeTimestamp(@Param("id") long id, @Param("someTimestamp") Instant someTimestamp)
When executing the code I got the following error:
org.postgresql.util.PSQLException: Can't infer the SQL type to use for an instance of java.time.Instant. Use setObject() with an explicit Types value to specify the type to use.
Did I forget something or is usage of Instant as parameter simply not supported by Spring Data Jdbc? If so, is such a support planned in the future?
Spring Data JDBC has no knowledge of the type expected by the SQL-statement. Therefore it passes parameters a long without any conversion and relies on the database to properly handle the parameter.
One might argue that it should convert parameters if a matching converter is registered, but this is currently not the case.
Therefore currently the solution is to convert the argument yourself and changing the argument type to java.util.Date or whatever your JDBC driver is accepting.