high beffer gets
could some one explain me why below query takes high buffer gets.
SQL IdSQL Text2pxdj04wdwhj0SELECT DISTINCT T1.objid, T1.id_number, T1.case_type_lvl1, T1.x_svc_id, T1.x_fault_create_dt, T1.x_clearcode1, T1.x_aux_id, T1.case_type_lvl2, T1.case_type_lvl3, T1.case_soln2workaround, T1.case_prevq2queue, T1.case_currq2queue, T1.case_wip2wipbin, T1.case_logic2prog_logic, T1.case_owner2user, T1.case_state2condition, T1.case_originator2user, T1.case_empl2employee, T1.calltype2gbst_elm, T1.respprty2gbst_elm, T1.respsvrty2gbst_elm, T1.case_prod2site_part, T1.case_reporter2site, T1.case_reporter2contact, T1.entitlement2contract, T1.casests2gbst_elm, T1.case_rip2ripbin, T1.covrd_ppi2site_part, T1.case_distr2site, T1.case2address, T1.case_node2site_part, T1.de_product2site_part, T1.case_prt2part_info, T1.de_prt2part_info, T1.alt_contact2contact, T1.task2opportunity, T1.case2life_cycle, T1.case_victim2case, T1.entitle2contr_itm, T1.case2blg_argmnt, T1.case2fin_accnt, T1.case2pay_channel, T1.case2order, T1.case2transn_map, T1.case2pp_bucket, T1.x_case2x_faultcode, T1.x_custadvice2x_contact, T1.x_case2x_cr_contact, T1.x_case2search, T1.case2x_hazard_note, T1.x_case2x_case_dt, T1.x_case2x_vr_exch_code, T1.x_case2x_trc_inf FROM table_case T1 INNER JOIN table_gbst_elm T2 ON T1.casests2gbst_elm = T2.objid INNER JOIN table_condition T3 ON T1.case_state2condition = T3.objid WHERE T1.case_type_lvl1 = :P16 and T1.id_number <> :P17 and T1.S_x_svc_id = :P18 and T1.x_fault_create_dt between TO_DATE ( :"SYS_B_0" , :P19 ) and TO_DATE ( :"SYS_B_1" ,