Spring data repository sends null as bytea to PostgreSQL database

Question

After switching from MySQL to PostgreSQL I found out that my SQL query (@Query in spring data repository interface) does not work anymore. The issue is caused by null value being sent as bytea and I'm getting following exception:

Caused by: org.postgresql.util.PSQLException: ERROR: operator does not exist: bigint = bytea
Hint: No operator matches the given name and argument type(s). You might need to add explicit type casts.

Repository with @Query:

public interface WineRepository extends PagingAndSortingRepository<Wine, Long> {
    @Query(value = "SELECT * FROM WINE w WHERE (?1 IS NULL OR w.id = ?1)", nativeQuery = true)
    Wine simpleTest(Long id);
}

Simple test:

LOGGER.warn("test1: {}", wineRepository.simpleTest(1L));    //ok
LOGGER.warn("test2: {}", wineRepository.simpleTest(null));  //PSQLException

In the real case I have multiple parameters which can be null and I would prefer not checking them in java code but sending them to sql query. I have checked questions here on stackoverflow but found none with a good answer especially for spring data repository @query annotation.

What is a correct way of handling null values with PostgreSQL? Or do you have any hints how to fix my approach? Thanks!

Update: Issue seems to be related to nativeQuery = true, when value is false, null values work as expected. So the question is whether it is possible to make it function even with nativeQuery enabled.

Answer 1

Try this.

SELECT *
FROM WINE w
WHERE ?1 IS NULL OR w.id = CAST(CAST(?1 AS TEXT) AS BIGINT)

It satisfies the type checker and should have the same properties as the original query. CAST is not a big performance hit if it happens on a constant value rather than a value from a database row.