问题描述
客户的Logical Standby数据库出现如下错误,这个错误出现在使用skip跳过某个表的DML事务之后。
类似如下操作:
alter database stop logical standby apply; execute dbms_logstdby.skip (stmt => 'DML', schema_name => 'EYGLE',object_name => 'SALES', proc_name => null); alter database start logical standby apply;
此时数据库的日志如下:
Sat Feb 7 22:46:00 2009 LOGMINER: Parameters summary for session# = 1 LOGMINER: Number of processes = 6, Transaction Chunk Size = 201 LOGMINER: Memory Size = 1000M, Checkpoint interval = 5000M LOGMINER: session# = 1, reader process P000 started with pid=24 OS id=626908 LOGMINER: session# = 1, builder process P001 started with pid=26 OS id=569542 LOGMINER: session# = 1, preparer process P002 started with pid=27 OS id=635368 LOGMINER: session# = 1, preparer process P003 started with pid=28 OS id=663834 LOGMINER: session# = 1, preparer process P004 started with pid=29 OS id=590192 LOGMINER: session# = 1, preparer process P005 started with pid=30 OS id=434476 LSP2 started with pid=32, OS id=557268 Sat Feb 7 22:46:01 2009 krvxerpt: Errors detected in process 19, role LOGICAL STANDBY COORDINATOR. Sat Feb 7 22:46:01 2009 krvsqn2s: unhandled failure 604 Sat Feb 7 22:46:01 2009 Errors in file /u01/admin/cdr/bdump/cdr_lsp0_688564.trc: ORA-00604: error occurred at recursive SQL level 1 ORA-01425: escape character must be character string of length 1 LOGSTDBY status: ORA-00604: error occurred at recursive SQL level 1 ORA-01425: escape character must be character string of length 1 Sat Feb 7 22:46:01 2009 Errors in file /u01/admin/cdr/bdump/cdr_lsp0_688564.trc:
专家解答
根据Metalink Note:748208.1 ,这是一个Bug:5108158,在 11g 中被修正。
在目前版本中可以通过如下步骤解决:
***Stop logical apply before proceeding *** set echo on set pagesize 100 spool workaround.log select * from system.logstdby$skip; select distinct nvl(esc, 'NULL') from system.logstdby$skip; select * from system.logstdby$skip where esc is null; update system.logstdby$skip set esc = '\' where esc is NULL; -- Following should return no rows (due to update above) select * from system.logstdby$skip where esc is null; -- should no longer see any NULL in output select distinct nvl(esc, 'NULL') from system.logstdby$skip; -- Capture a snapshot of the final results select * from system.logstdby$skip; -- commit changes commit; After this is done, please attempt to restart apply and let us if error occurs again.
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