在设置 character_set_results=NULL 情况下执行 show create table 出现 Invalid argument 报错的原因和解决方法

obclient [(none)]> set character_set_results=NULL;
Query OK, 0 rows affected (0.000 sec)
obclient [test]> show create table dpst_fee_tx_msg_bak;
ERROR 1210 (HY000): Invalid argument

observer.log.20240530174309494:[2024-05-30 17:42:43.338912] WDIAG [LIB.CHARSET] charset_convert (ob_charset.cpp:2982) [91465][T1006_L0_G0][T1006][xxxxx-xxxxx-xxxxx-xxxxx] [lt=36][errcode=-4002] invalid collation type(ret=-4002, src_cs_type=45, dst_cs_type=0)
observer.log.20240530174309494:[2024-05-30 17:42:43.338936] WDIAG [SHARE.SCHEMA] print_table_definition_columns (ob_schema_printer.cpp:352) [91465][T1006_L0_G0][T1006][xxxxx-xxxxx-xxxxx-xxxxx] [lt=25][errcode=-4002] fail to convert charset(ret=-4002)