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Query optimization - Please help

While executing a stored procedure, I am getting this error message,

Msg 8621, Level 17, State 2, Line 1 The query processor ran out of stack space during query optimization. Please simplify the query.
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asked Jan 27, 2012 at 10:40 PM in Default

Bins gravatar image

Bins
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Could you post the query?
Jan 28, 2012 at 01:21 AM sp_lock
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1 answer: sort voted first

This is a rare internal error (the optimizer contains logic to avoid stack problems in the most common cases). Related errors can occur as a result of having too many EXISTS clauses at the same level, for example. In this case it is likely you have too many nested subqueries, UNIONs or something of that nature.

In any case, the error message is pretty specific about the problem and what you should do about it. Encountering this sort of error is usually a pretty reliable sign that your query is too complex - probably for humans as well as optimizers. Find a way to break the logic into simpler stages.
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answered Jan 28, 2012 at 02:26 AM

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I always like the catastrophic failure errors with malformed merge queries
Jan 28, 2012 at 02:58 AM Scot Hauder
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asked: Jan 27, 2012 at 10:40 PM

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Last Updated: Jan 27, 2012 at 10:40 PM