ORA-31670: Username argument must be specified and non-null. Cause: Called change userwith a NULL username or a null string. Action: Specify a validusername argument. If this error occurs from a Data Pump
client (e.g. expdp or impdp), try the operation again. If the error occursagain,
contact Oracle Customer Support and report the error.
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发表于 2016-9-6 20:51:23
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