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Help with explain on query
Posted by: Alex Titley
Date: August 16, 2017 09:09AM

Hi there,

I am running an explain on a query and we get a ref null, is this a bad thing?

id, select_type, table, type, possible_keys, key, key_len, ref, rows, Extra
1, 'SIMPLE', 'a', 'range', 'Barcode,Status,setid', 'setid', '22', '', 163651, 'Using where; Using filesort'
1, 'SIMPLE', 's', 'eq_ref', 'PRIMARY', 'PRIMARY', '14', 'musiclender.a.barcode,const', 1, 'Using where'

Thanks, Alex.

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