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-- Add new index (tblcreditcards_last_four) for last_four column in tblcreditcards set @query = if ((SELECT count(INDEX_NAME) FROM INFORMATION_SCHEMA.STATISTICS WHERE TABLE_SCHEMA = database() AND TABLE_NAME = 'tblcreditcards' AND INDEX_NAME = 'tblcreditcards_last_four') = 0, 'CREATE INDEX `tblcreditcards_last_four` ON `tblcreditcards` (`last_four`(4))', 'DO 0'); prepare statement from @query; execute statement; deallocate prepare statement;