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Sun, Aug 23 2009 9:18 AM | Permanent Link |
Roy Lambert NLH Associates ![]() | Uli
>As Roy told you: if there is an index on the field you are grouping the >result can be sensitive. As they say in all the best pantos "OH no I didn't" Roy Lambert Mind you it was open to mis-interpretation. |
Sun, Aug 23 2009 10:07 AM | Permanent Link |
Uli Becker | Michael,
> Are you sure ? I just tried and the result was read-only. > (I have an index on the group field) I am very sorry: I misread your posting and referred to "order by" instead of "group by". You are right - the result is never sensitive: The manual says: Queries that retrieve data from a single table will generate a sensitive result set provided that: 1) The user or developer requests a sensitive result set cursor. Please see the DECLARE statement for more information on requesting a a sensitive or insensitive result set cursors in SQL/PSM routines, and your productspecific manual for requesting sensitive or insensitive cursors in client applications. 2) There is no DISTINCT keyword in the SELECT statement. 3) All SELECT expressions are either a column reference or a computed column that does not contain any aggregate functions (MIN, MAX, SUM, etc.), sub-queries, or non-native function references (functions created via the CREATE FUNCTION statement). Computed columns are read-only in the sensitive result set cursor and cannot be modified. 4) There is no GROUP BY clause in the SELECT statement. 5) There is no ORDER BY clause in the SELECT statement, or there is an ORDER BY clause that minimally matches the columns, and the collations defined for the columns, in an existing index in the source table. 6) There are no correlated sub-queries in the JOIN or WHERE clauses of the SELECT statement. 7) There is no RANGE clause in the SELECT statement. Uli |
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