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Graph Information

Field Internal name Type Warn Crit Info
Full join Select_full_join derive     The number of joins that perform table scans because they do not use indexes.
Full range Select_full_range_join derive     The number of joins that used a range search on a reference table.
Range Select_range derive     The number of joins that used ranges on the first table.
Range check Select_range_check derive     The number of joins without keys that check for key usage after each row.
Scan Select_scan derive     The number of joins that did a full scan of the first table.