Pitfalls

Cloning with Pluggable Databases in Oracle 18c

We had several discussions on the internal mailing lists the other day about cloning with Pluggable Databases in Oracle 18c (or 12.2.0.1). And I blogged about this topic a while ago but realized I may need to refresh this a bit.

Cloning with Pluggable Databases in Oracle 18c

My example from the old blog post still works fine. But I realized that I switched my database into read-only mode. Hence, I like to repeat it and check different options.

Cloning a 12.1 PDB into Oracle 18c

In the source CDB1 I create a fresh PDB first, then open it and create a cloning user with the necessary … [ Read more ]

Some Data Pump issues: DBMS_DATAPUMP Import via NETWORK_LINK fails + STATUS parameter giving bad performance

One of my dear Oracle ACS colleagues (Danke Thomas!) highlighted this issue to me as one of his lead customers hit this pitfall a week ago. .

DBMS_DATAPUMP Import Over NETWORK_LINK fails with ORA-39126 / ORA-31600

Symptoms are:

KUPW$WORKER.CONFIGURE_METADATA_UNLOAD [ESTIMATE_PHASE]
ORA-31600: invalid input value IN ('VIEWS_AS_TABLES/TABLE_DATA') for parameter VALUE in function SET_FILTER

This can be cured with the patch for bug19501000 –  but this patch can conflict with:Bug 18793246  EXPDP slow showing base object lookup during datapump export causes full table scan per object and therefore may require a merge patchpatch 21253883 is the one to go … [ Read more ]