We use Oracle db. Some indexes were created from the jShell. While mos
of the indexes seem to be active, for some it seems to be inactive.

When we send a query from jBase with a "WITH" clause on the indexed
key, for some the SQL query to Oracle is translated with a "WHERE"
clause and the performance is fine. But for a few, though there is an
index available for that key, the translated SQL query does  not have
the "WHERE" clause. Hence the Oracle db returns the entire cursor and
the filtering happens at jBase end. What could be the reason for this
behaviour?

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