Querying UUID not working concerning MariaDB

[spanky440]

Related request URL examples:

• /odata/v1/Entity(00b9cea8-97e9-4e8f-a097-473eef32df4d)
• /odata/v1/Entity?$filter=Id eq 00b9cea8-97e9-4e8f-a097-473eef32df4d

Related JPA Setup

import java.util.UUID;
import javax.persistence.*;

@Entity
public class Entity
{
  @Id
  @Column(name = "guid", length = 36)
  @Convert(converter = UuidConverter.class)
  private UUID id = UUID.randomUUID();
}

import java.util.UUID;
import javax.persistence.*;

@Converter
public class UuidConverter implements AttributeConverter<UUID, String>
{
  @Override
  public String convertToDatabaseColumn(UUID attribute)
  {
    return attribute.toString();
  }

  @Override
  public UUID convertToEntityAttribute(String dbData)
  {
    return UUID.fromString(dbData);
  }
}

✔️ Setup is working with the in-memory H2 database.
❌ Setup is not working when using MariaDB (org.mariadb.jdbc.Driver) as datasource.

However, after debugging a couple of hours through the code base, my main question is:
Why is the defined UuidConverter not respected, when building the SQL query criteria?

• UuidConverter not respected due to conversionRequired == false for all olingo supported types (including java.util.UUID)

Since the SQL statement is native, I guess it needs database type related query arguments.

• ExpressionImpl.java#L353:
  is: converter = Optional.ofNullable(jpaPath.get().getLeaf().getConverter());
  might be: converter = Optional.ofNullable(jpaPath.get().getLeaf().getRawConverter());

Regards