Oracle外部表——指定动态文件名

CREATE TABLE LOG_FILES (
        LOG_DTM VARCHAR(18),
    LOG_TXT VARCHAR(300)
   )
 ORGANIZATION EXTERNAL(
   TYPE ORACLE_LOADER
   DEFAULT DIRECTORY LOG_DIR
   ACCESS PARAMETERS(
      RECORDS  DELIMITED BY NEWLINE
      FIELDS(
        LOG_DTM position(1:18),
        LOG_TXT position(19:300)
      )
   )
   LOCATION('logadm'))
)
REJECT LIMIT UNLIMITED
/
CREATE TABLE LOG_FILES (
        LOG_DTM VARCHA