spring数据jpa生成错误的sql

Question

实体DSSchema：

@Entity
@Table(name = "DS_SCHEMA", schema = "DSUSER")
public class DSSchema {

    @Id
    @GenericGenerator(name = "idGenerator", strategy = "uuid2")
    @GeneratedValue(generator = "idGenerator")
    private String id;

}

实体DSTableRelation：

@Entity
@Table(name = "DS_TABLE_RELATION", schema = "DSUSER")
public class DSTableRelation {

    @Id
    @GenericGenerator(name = "idGenerator", strategy = "uuid2")
    @GeneratedValue(generator = "idGenerator")
    private String id;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "SCHEMA_ID", nullable = false)
    private DSSchema schema;

}

实体DSColumnRelation：

@Entity
@Table(name = "DS_COLUMN_RELATION", schema = "DSUSER")
public class DSColumnRelation {

    @Id
    @GenericGenerator(name = "idGenerator", strategy = "uuid2")
    @GeneratedValue(generator = "idGenerator")
    private String id;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "TABLE_RELATION_ID", nullable = false)
    private DSTableRelation tableRelation;

}

存储库DSColumnRelationRepository：

public interface DSColumnRelationRepository extends JpaRepository<DSColumnRelation, String> {

    @Modifying
    @Query("delete from DSColumnRelation c where c.tableRelation.schema.id = ?1")
    void deleteBySchemaId(String schemaId);

}

执行方法'deleteBySchemaId'，并检查生成的sql：

delete 
from
    DSUSER.DS_COLUMN_RELATION cross 
join
    DSUSER.DS_TABLE_RELATION dstablerel1_ 
where
    SCHEMA_ID=?

这个sql是错误的sql，请告诉我为什么使用spring数据jpa导致错误，谢谢。