id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE sc index_merge idspectacle_2, idcontact, idcontact_festival idcontact, idcontact_festival 5, 5 29 Using union(idcontact, idcontact_festival); Using where; Using filesort
1 SIMPLE s eq_ref PRIMARY PRIMARY 4 theatreok_dev.sc.idspectacle 1 Using where
1 SIMPLE oc ref PRIMARY, idcontent PRIMARY 4 theatreok_dev.sc.idspectacle 2 Using index
1 SIMPLE ct eq_ref PRIMARY PRIMARY 4 theatreok_dev.oc.idcontent 1 Using where
1 SIMPLE cc ref PRIMARY PRIMARY 4 theatreok_dev.oc.idcontent 1 Using index