When to create indexes on custom tables?

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When to create indexes on custom tables?

06-02-2007, 03:43 PM

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So for instance, i have the query shown in query.gif (attached) which I am trying to optimize. I ran explain on it (also attached as explain.gif) and it's telling me that I need to create an index on table 1`c` correct?

I created an index on table scst_fb for fbid and when i run the query, it's still saying filesort in the extra column for explain. Shouldn't it be using the index now?

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	explain.gif (35.7 KB, 0 views)

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