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原文链接： https://www.modb.pro/db/23449?xy
在 Oracle 12.2 中，因为在线的分区合并、维护等工作导致了一个BUG的引入。
错误是 ORA-600 错误体现出来的，错误信息类似如下：
ORA-00600: internal error code, arguments: [kkpofpcd3], [], [], [], [], [], [], [], [], [], [], []
引发错误的SQL类似如下：
----- Current SQL Statement for this session (sql_id=c3zymn7x3k6wy) ----- select obj#, dataobj#, part#, hiboundlen, hiboundval, flags, ts#, file#, block#, pctfree$, initrans, maxtrans, analyzetime, samplesize, rowcnt, blevel, leafcnt, distkey, lblkkey, dblkkey, clufac, pctthres$, length(bhiboundval), bhiboundval from indpart$ where bo# = :1 order by part# [TOC00005]
关键的错误信息如下，核心是 Fetch Partnum DictNum 这部分：
========= Dump for incident 216417 (ORA 600 [kkpofpcd3]) ======== [TOC00003] ----- Beginning of Customized Incident Dump(s) ----- fetched: partnum=0, dictnum=98, objn=63117 Owner = 0 Name = WRH$_FILESTATXS_PK SubName = WRH$_FILESTATXS_1263135530_266 objn_kkpacfrag = 63117 objd_kkpacfrag = 63117 tsn_kkpacfrag = 1 dba_kkpacfrag = 0x00000000 fragnum_kkpacfrag = 0 dictnum_kkpacfrag = 98 status_kkpacfrag = 0x0 flags_kkpacfrag = 0x0 fragtype_kkpacfrag = 0 hibnd_kkpacfrag = "MAXVALUE, MAXVALUE" bhibnd_kkpacfrag : len=0, key= kkpodDumpOcd begin: hd=0 ocd=7000101de49eba0 parttype_kkpacocd = 1 subptype_kkpacocd = 0 partcnt_kkpacocd = 10 flags_kkpacocd = 0x3 mflags_kkpacocd = 0x0 status_kkpacocd = 0x0 hidPartcnt_kkpacocd = 0 hasSageTsn_kkpacocd = 0 hasExadoopTsn_kkpaco = 0 noDMOffload_kkpacocd = 0 noDIDTSOffload_kkpac = 0 noXMLOffload_kkpacoc = 0 noJSONOffload_kkpaco = 0 noVGBYOffload_kkpaco = 0 partKCols_kkpacocd: colCnt=2 [0] id=2, knl=2, dty=2, usr=2, csid=0, csform=0 [1] id=1, knl=1, dty=2, usr=1, csid=0, csform=0 pcd=7000101de49f080, partnum=1, dictnum=10, objn=62637 Owner = 0 Name = WRH$_FILESTATXS_PK SubName = WRH$_FILESTATXS_1263135530_0 objn_kkpacfrag = 62637 objd_kkpacfrag = 62637 tsn_kkpacfrag = 1 dba_kkpacfrag = 0x00c17b12 fragnum_kkpacfrag = 1 dictnum_kkpacfrag = 10 status_kkpacfrag = 0x0 flags_kkpacfrag = 0x0 fragtype_kkpacfrag = 1 hibnd_kkpacfrag = "1263135530, 30" bhibnd_kkpacfrag : len=0, key= subpcnt_kkpacpcd = 0 status_kkpacpcd = 0 pcd=7000101de49f218, partnum=2, dictnum=11, objn=62900 Owner = 0 Name = WRH$_FILESTATXS_PK SubName = WRH$_FILESTATXS_1263135530_30 objn_kkpacfrag = 62900 objd_kkpacfrag = 62900 tsn_kkpacfrag = 1 dba_kkpacfrag = 0x00c2489a fragnum_kkpacfrag = 2 dictnum_kkpacfrag = 11 status_kkpacfrag = 0x0 flags_kkpacfrag = 0x0 fragtype_kkpacfrag = 1 hibnd_kkpacfrag = "1263135530, 76" bhibnd_kkpacfrag : len=0, key= subpcnt_kkpacpcd = 0 status_kkpacpcd = 0 pcd=7000101de49f3b0, partnum=3, dictnum=13, objn=62901 Owner = 0 Name = WRH$_FILESTATXS_PK SubName = WRH$_FILESTATXS_1263135530_76 objn_kkpacfrag = 62901 objd_kkpacfrag = 62901 tsn_kkpacfrag = 1 dba_kkpacfrag = 0x00c248a2 fragnum_kkpacfrag = 3 dictnum_kkpacfrag = 13 status_kkpacfrag = 0x0 flags_kkpacfrag = 0x0 fragtype_kkpacfrag = 1 hibnd_kkpacfrag = "1263135530, MAXVALUE" bhibnd_kkpacfrag : len=0, key= subpcnt_kkpacpcd = 0 status_kkpacpcd = 0 pcd=7000101de49f550, partnum=4, dictnum=22, objn=63066 Owner = 0 Name = WRH$_FILESTATXS_PK SubName = WRH$_FILESTATXS_MXDB_MXSN objn_kkpacfrag = 63066 objd_kkpacfrag = 63066 tsn_kkpacfrag = 1 dba_kkpacfrag = 0x00c2806a fragnum_kkpacfrag = 4 dictnum_kkpacfrag = 22 status_kkpacfrag = 0x0 flags_kkpacfrag = 0x0 fragtype_kkpacfrag = 1 hibnd_kkpacfrag = "1263135530, 122" bhibnd_kkpacfrag : len=0, key= subpcnt_kkpacpcd = 0 status_kkpacpcd = 0 pcd=7000101de49f6e8, partnum=5, dictnum=33, objn=63076 Owner = 0 Name = WRH$_FILESTATXS_PK SubName = WRH$_FILESTATXS_1263135530_122 objn_kkpacfrag = 63076 objd_kkpacfrag = 63076 tsn_kkpacfrag = 1 dba_kkpacfrag = 0x00c2807a fragnum_kkpacfrag = 5 dictnum_kkpacfrag = 33 status_kkpacfrag = 0x0 flags_kkpacfrag = 0x0 fragtype_kkpacfrag = 1 hibnd_kkpacfrag = "1263135530, 146" bhibnd_kkpacfrag : len=0, key= subpcnt_kkpacpcd = 0 status_kkpacpcd = 0 pcd=7000101de49f880, partnum=6, dictnum=44, objn=63080 Owner = 0 Name = WRH$_FILESTATXS_PK SubName = WRH$_FILESTATXS_1263135530_146 objn_kkpacfrag = 63080 objd_kkpacfrag = 63080 tsn_kkpacfrag = 1 dba_kkpacfrag = 0x00c2870a fragnum_kkpacfrag = 6 dictnum_kkpacfrag = 44 status_kkpacfrag = 0x0 flags_kkpacfrag = 0x0 fragtype_kkpacfrag = 1 hibnd_kkpacfrag = "1263135530, 170" bhibnd_kkpacfrag : len=0, key= subpcnt_kkpacpcd = 0 status_kkpacpcd = 0 pcd=7000101de4a1468, partnum=7, dictnum=55, objn=63084 Owner = 0 Name = WRH$_FILESTATXS_PK SubName = WRH$_FILESTATXS_1263135530_170 objn_kkpacfrag = 63084 objd_kkpacfrag = 63084 tsn_kkpacfrag = 1 dba_kkpacfrag = 0x00c2871a fragnum_kkpacfrag = 7 dictnum_kkpacfrag = 55 status_kkpacfrag = 0x0 flags_kkpacfrag = 0x0 fragtype_kkpacfrag = 1 hibnd_kkpacfrag = "1263135530, 194" bhibnd_kkpacfrag : len=0, key= subpcnt_kkpacpcd = 0 status_kkpacpcd = 0 pcd=7000101de4a1600, partnum=8, dictnum=66, objn=63088 Owner = 0 Name = WRH$_FILESTATXS_PK SubName = WRH$_FILESTATXS_1263135530_194 objn_kkpacfrag = 63088 objd_kkpacfrag = 63088 tsn_kkpacfrag = 1 dba_kkpacfrag = 0x00c295ba fragnum_kkpacfrag = 8 dictnum_kkpacfrag = 66 status_kkpacfrag = 0x0 flags_kkpacfrag = 0x0 fragtype_kkpacfrag = 1 hibnd_kkpacfrag = "1263135530, 218" bhibnd_kkpacfrag : len=0, key= subpcnt_kkpacpcd = 0 status_kkpacpcd = 0 pcd=7000101de4a1798, partnum=9, dictnum=77, objn=63112 Owner = 0 Name = WRH$_FILESTATXS_PK SubName = WRH$_FILESTATXS_1263135530_218 objn_kkpacfrag = 63112 objd_kkpacfrag = 63112 tsn_kkpacfrag = 1 dba_kkpacfrag = 0x00c299a2 fragnum_kkpacfrag = 9 dictnum_kkpacfrag = 77 status_kkpacfrag = 0x0 flags_kkpacfrag = 0x0 fragtype_kkpacfrag = 1 hibnd_kkpacfrag = "1263135530, 242" bhibnd_kkpacfrag : len=0, key= subpcnt_kkpacpcd = 0 status_kkpacpcd = 0 pcd=7000101de4a1930, partnum=10, dictnum=88, objn=63116 Owner = 0 Name = WRH$_FILESTATXS_PK SubName = WRH$_FILESTATXS_1263135530_242 objn_kkpacfrag = 63116 objd_kkpacfrag = 63116 tsn_kkpacfrag = 1 dba_kkpacfrag = 0x00c299c2 fragnum_kkpacfrag = 10 dictnum_kkpacfrag = 88 status_kkpacfrag = 0x0 flags_kkpacfrag = 0x0 fragtype_kkpacfrag = 1 hibnd_kkpacfrag = "1263135530, 266" bhibnd_kkpacfrag : len=0, key= subpcnt_kkpacpcd = 0 status_kkpacpcd = 0 kkpodDumpOcd end: hd=0
这个问题对应的 BUG是：
Bug 25583657 ALTER TABLE MERGE PARTITIONS ONLINE MAY FAIL WITH ORA-600: [KKPOFPCD3]
这个 BUG 在 18.1 中被修正，官方的描述如下：
Description
This bug is only relevant when using Partitioned Tables Brief Description: If you get ORA-600: [KKPOFPCD3] while doing merge partition online, then its likely that you have hit this bug. Rediscovery Notes If you get ORA-600: [KKPOFPCD3] while doing merge partition online, then its likely that you have hit this bug. Workaround NONE
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