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QuestionRegarding DataGrid Pin
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QuestionHow do I display in a textbox a relational database field Pin
Glen Harvy23-Jul-06 19:17
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QuestionCursor limitations Pin
cmk23-Jul-06 18:23
cmk23-Jul-06 18:23 
Is there a document somewhere (yes i've looked) that lists the restrictions/limitations for different cursor types.
I'm mainly looking for something in an ODBC context but would be happy enough with SQLSrv specific.

I have seen: http://blogs.msdn.com/mssqlisv/archive/2006/06/23/644493.aspx

"Generally, a (FAST) FORWARD-ONLY cursor is the most performant, followed by DYNAMIC, KEYSET, and finally STATIC which is generally the least performant.
For example, if a FAST FORWARD ODBC API Server Cursor referenced a text column, it would typically degrade to a DYNAMIC cursor, however if the query also generates an internal work table because an ORDER BY condition is not covered by an index, then the cursor would degrade to a KEYSET cursor. If at this point the query also referenced a table without a unique index the cursor degraded further to a STATIC cursor. This is an extreme example; however it illustrates the sequence of events that previous versions of SQL Server used to degrade a cursor to a progressively 'more expensive' cursor
type."

This is great, but i expect incomplete.
Nor does it explain why a text column would cause a forward-only cursor to
'degrade', or ...


...cmk

Save the whales - collect the whole set

AnswerRe: Cursor limitations Pin
Mike Dimmick24-Jul-06 6:11
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QuestionGet Data Vertically From Clone Tables Pin
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QuestionSQL - Invalid use of IS operator in query expression Pin
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