想同步oracle外部表到内部表，SIGNATURE_IMAGE字段是blob，目前查询报错，各位大佬们，目前有办法同步吗？
create table test_sink as select id,SIGNATURE_IMAGE from oracle_catalog.TEST.test_source
Error Failed to execute sql: java.sql.SQLException: (conn=2600) errCode = 2, detailMessage = Unsupported type 'UNSUPPORTED_TYPE' in 'SIGNATURE_IMAGE'.
