OGG目前不支持对10g以后压缩表(compressed table)的extract，若挖掘到压缩表相关的DML纪录则extract会abend: 
SQL> alter table sales compress 2;
Table altered.

SQL>  update sales set  AMOUNT_SOLD= AMOUNT_SOLD +1 where rownum<200;
199 rows updated.

SQL> commit;
Commit complete.

extract report:
***********************************************************************
**                     Run Time Messages                             **
***********************************************************************
2010-12-12 23:08:44  INFO    OGG-01517  Position of first record processed Sequence 51,
RBA 12853264, SCN 0.53443895, 2010-12-12 下午11:08:42.
TABLE resolved (entry CLINIC.SALES):
  Table CLINIC.SALES;

Source Context :
  SourceModule            : [ggdb.ora.dbx]
  SourceID                : [/home/ecloud/workspace/Build_FBO_OpenSys_r11.1.1.0.0_078_[34093]/perforce/src/gglib/ggdbora/dbxoci.c]
  SourceFunction          : [get_object_attributes]
  SourceLine              : [5122]
  ThreadBacktrace         : [20] elements
                          : [/home/maclean/gg/extract(CMessageContext::AddThreadContext()+0x26) [0x7f6596]]
                          : [/home/maclean/gg/extract(CMessageFactory::CreateMessage(
CSourceContext*, unsigned int, ...)+0x7b2) [0x7ed032]]
                          : [/home/maclean/gg/extract(_MSG_ERR_ORACLE_COMPRESSED_TABLE
(CSourceContext*, DBString<777> const&, CMessageFactory::MessageDisposition)+0x92) [0x79c842]]
                          : [/home/maclean/gg/extract(gl_get_odbc_table_def(file_def*, short, char*)+0x6a4) [0x6a7ee4]]
                          : [/home/maclean/gg/extract [0x54e03e]]
                          : [/home/maclean/gg/extract [0x54f078]]
                          : [/home/maclean/gg/extract(get_map_entry(char*, int, __wc*, int)+0x841) [0x550cf1]]
                          : [/home/maclean/gg/extract [0x62ec62]]
                          : [/home/maclean/gg/extract(WILDCARD_check_table(char const*, char const*,
 int, unsigned int*, int, unsigned int, DBString<777>*, int)+0x320) [0x630560]]
                          : [/home/maclean/gg/extract(REDOORA_lookup_table(file_def**, log_context_t*, int)+0x1398) [0x6ce678]]
                          : [/home/maclean/gg/extract [0x70b81c]]
                          : [/home/maclean/gg/extract(REDOORAOUT_get_committed_record(objectpool*,
cache_object*, log_context_t*, chkpt_context_t*, short, int, int, int*, char*, int*, int*, int*, char*,
short*, int*, char*)+0x449) [0x713619]]
                          : [/home/maclean/gg/extract [0x6fc77e]]
                          : [/home/maclean/gg/extract(REDOORAOPS_process_ops
(subrec_info_t*, objectpool*, objectpool*, cache_object**, log_context_t*, redo_thread_t*,
chkpt_context_t*, long, int, int, int, char*, int*, int*, char*, short*, int*, char*)+0x5fa) [0x700bca]]
                          : [/home/maclean/gg/extract(REDO_read(char*, int*, long*, char*, short*, int, char*)+0xb6a) [0x6ca6fa]]
                          : [/home/maclean/gg/extract(READ_EXTRACT_RECORD(chkpt_context_t*,
short, char*, __std_rec_hdr*, int*, int*, long*, short, short, char*, short*, char*, short*,
long*, char*)+0x344) [0x4f0824]]
                          : [/home/maclean/gg/extract [0x56ab17]]
                          : [/home/maclean/gg/extract(main+0xfaa) [0x56fc3a]]
                          : [/lib64/libc.so.6(__libc_start_main+0xf4) [0x39f1c1d994]]
                          : [/home/maclean/gg/extract(__gxx_personality_v0+0x1f2) [0x4e5ada]]

2010-12-12 23:10:11  ERROR
OGG-01433  Failed to validate table CLINIC.SALES.
The table is compressed and extract will not be able to extract data from Oracle logs.