While I suspect that would be faster, it's also is likely to involve a huge amount of backtracking if you have many IDs.

True, but the target strings shown are pretty small. I'd benchmark this one before making assumptions about where the cutoverpoint between using a regex and using a hash is. I suspect that for a small number of keys, the regex wins.


Hm... the original post doesn't give us much guidance about the cardinality of the key file. Given that, I'd probably go with a hash after all.

In reply to Re: Re: Re: need more efficient way to write this query script by dws
in thread need more efficient way to write this query script by Anonymous Monk

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