| Cause Text: |
Conditions exist in the query which cause a sort to be used. This allowed
the open data path (ODP) to be reusable. One of the following reasons may
be the cause for the sort: - The query contains ordering columns (ORDER BY) from more than one table,
or contains ordering columns from a secondary table of a join query that cannot
be reordered.
- The grouping and ordering columns are not compatible.
- DISTINCT was specified for the query.
- UNION was specified for the query.
- The query had to be implemented using a sort. Key length of more than
2000 bytes, more than 120 ordering columns, or an ordering column containing
a reference to an external user-defined function was specified for ordering.
- The query optimizer chose to use a sort rather than an index to order
the results of the query.
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