一张表，20多万数据，却遇到了问题。
关键报错：
ORA-39097 ORA-39065 ORA-01427 ORA-39126 ORA-06502 LPX-00225
导入语句：
impdp "'/as sysdba'" directory=DATA_PUMP_DIR dumpfile=NCHATTAG1.dmp logfile=TAG1_bak.log
log如下：
Import: Release 11.2.0.4.0 - Production on Tue Dec 24 15:59:30 2019
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, Oracle Label Security, OLAP, Data Mining,
Oracle Database Vault and Real Application Testing options
Master table "SYS"."SYS_IMPORT_FULL_02" successfully loaded/unloaded
Starting "SYS"."SYS_IMPORT_FULL_02": "/******** AS SYSDBA" directory=DATA_PUMP_DIR dumpfile=NCHATTAG1.dmp logfile=TAG1_bak.log
Processing object type TABLE_EXPORT/TABLE/TABLE
Processing object type TABLE_EXPORT/TABLE/TABLE_DATA
. . imported "NCHATTAG1"."MESSAGE" 68.48 MB 205729 rows
Processing object type TABLE_EXPORT/TABLE/GRANT/OWNER_GRANT/OBJECT_GRANT
ORA-39083: Object type OBJECT_GRANT failed to create with error:
ORA-01917: user or role 'P_WANGYP_R' does not exist
Failing sql is:
GRANT SELECT ON "NCHATTAG1"."MESSAGE" TO "P_WANGYP_R"
ORA-39083: Object type OBJECT_GRANT failed to create with error:
ORA-01917: user or role 'R_NCHATTAG1_READER' does not exist
Failing sql is:
GRANT SELECT ON "NCHATTAG1"."MESSAGE" TO "R_NCHATTAG1_READER"
Processing object type TABLE_EXPORT/TABLE/INDEX/INDEX
Processing object type TABLE_EXPORT/TABLE/CONSTRAINT/CONSTRAINT
Processing object type TABLE_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS
Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
ORA-39126: Worker unexpected fatal error in KUPW$WORKER.PUT_DDLS [TABLE_STATISTICS]
ORA-06502: PL/SQL: numeric or value error
LPX-00225: end-element tag "HIST_GRAM_LIST_ITEM" does not match start-element tag "EPVALUE"
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 95
ORA-06512: at "SYS.KUPW$WORKER", line 9715
----- PL/SQL Call Stack -----
object line object
handle number name
0x62926f00 21979 package body SYS.KUPW$WORKER
0x62926f00 9742 package body SYS.KUPW$WORKER
0x62926f00 17950 package body SYS.KUPW$WORKER
0x62926f00 4058 package body SYS.KUPW$WORKER
0x62926f00 10450 package body SYS.KUPW$WORKER
0x62926f00 1824 package body SYS.KUPW$WORKER
0x67897468 2 anonymous block
ORA-39097: Data Pump job encountered unexpected error -1427
ORA-39065: unexpected master process exception in DISPATCH
ORA-01427: single-row subquery returns more than one row
Job "SYS"."SYS_IMPORT_FULL_02" stopped due to fatal error at Tue Dec 24 16:00:01 2019 elapsed 0 00:00:30
可以看到dw进程在处理表的统计信息时，在处理直方图信息的时候出现了错误，在源端查询表上确实有直方图。这种内部处理过程出现无法正确处理的情况，可以认为是oracle的bug。解决办法也简单，绕过统计信息即可：
impdp "'/as sysdba'" directory=DATA_PUMP_DIR dumpfile=NCHATTAG1.dmp logfile=TAG1_bak.log table_exists_action=replace EXCLUDE=STATISTICS
无报错成功导入。
手动收集统计信息：
oracle@bd-dev-oracle-104:/opt/app/oracle/diag/rdbms/bdcfg/BDCFG/trace$ora ant NCHATTAG1 message
=============Tue Dec 24 16:54:43 CST 2019===================
exec DBMS_STATS.GATHER_TABLE_STATS(ownname=>'NCHATTAG1',tabname=>'message',estimate_percent=>10,no_invalidate=>false,cascade=>true,degree => 10);
Can you confirm?[y/n]
y
事后去mos上搜索了一下，可以参考文档 ID 878626.1