Error "1038 Out of sort memory, consider increasing sort buffer size

Question

In symfony2, doctrine2, I have a query which triggers an error :

Error \"1038 Out of sort memory, consider increasing server sort buffer size

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Answer 1

In my case what actually helped without increasing the sort buffer size was to create indexes for the fields that I was ordering on. I'm not sure if it would work when joining tables but it will work when trying to order a single table which is very large.