Fix interface example errors causes by backend changes.

Bruce Momjian <bruce@momjian.us>

Commit: ce4a287f43f561551bbb2eb7d7912cea44f66e90
Author: Bruce Momjian <bruce@momjian.us>
Date: 2002-06-07T03:55:15Z
Releases: 7.3.1
Fix interface example errors causes by backend changes.

Permaine Cheung

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