set sql_log_bin=0;
use accounting;

DROP PROCEDURE IF EXISTS drop_index_if_exists_proc;
DELIMITER ;;
CREATE PROCEDURE drop_index_if_exists_proc(IN idx_db varchar(64),
                                           IN idx_table varchar(64),
                                           IN idx_name varchar(64))
BEGIN

    DECLARE idx_exists int default 0;
    SELECT count(INDEX_NAME) INTO idx_exists
      FROM INFORMATION_SCHEMA.STATISTICS
    WHERE TABLE_SCHEMA = idx_db
      AND TABLE_NAME = idx_table
      AND INDEX_NAME = idx_name;

    IF idx_exists > 0 THEN
        SET @q = CONCAT('DROP INDEX `', idx_name, '` ON `', idx_db, '`.`', idx_table, '`');
        PREPARE stmt FROM @q;
        EXECUTE stmt;
    END IF;

END ;;
DELIMITER ;

CALL drop_index_if_exists_proc('accounting','cdr','src_dst_stime_idx');
DROP PROCEDURE drop_index_if_exists_proc;