动态SQL WHERE

LOOP AT LT_C_PARAM_VALUE INTO LS_C_PARAM_VALUE.
    IF SY-TABIX = 1.
      LV_CTRL_SQL = |{ LS_C_PARAM_VALUE-ZCOND1 } = '{ LS_C_PARAM_VALUE-ZCOND1_VAL }'|.
    ELSE.
      LV_CTRL_SQL = |{ LV_CTRL_SQL } AND { LS_C_PARAM_VALUE-ZCOND1 } = '{ LS_C_PARAM_VALUE-ZCOND1_VAL }'|.
    ENDIF.
ENDLOOP.

IF LV_CTRL_SQL IS NOT INITIAL.
    LV_CTRL_SQL = |MATNR <> '{ <FS_BOM>-IDNRK }' AND { LV_CTRL_SQL }|.
    SELECT MATNR INTO CORRESPONDING FIELDS OF TABLE LT_CTRL_MAT
    FROM /ICDN/VIC_MARA
    WHERE (LV_CTRL_SQL).  "STRING
ENDIF.