RE: pros and cons

  • From: Stephen.Lee@xxxxxxxx
  • To: oracle-l@xxxxxxxxxxxxx
  • Date: Wed, 31 Mar 2004 10:10:08 -0600

One annoying consequence of the "feature":

If you have a primary key with its own index and you have another plain
index where a subset of its columns are  the same columns as the primary key
index, possibly with the columns in a different order (That's right! The
column order doesn't matter.), then: If you run an import what can happen is
that imp will assign the primary key constraint to the plain index and make
the original primary key index a unique index with no assigned constraint
name.  Import can lose the original primary key constraint and index
association.

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