ABAP时间的转换

SAP数据库表中的时间是根据系统时区存储的，这里需要将时间转换成用户时区。
首先获取系统时区：

DATA tzone_sy TYPE TZNZONE.
CALL FUNCTION 'GET_SYSTEM_TIMEZONE'
  IMPORTING
    timezone            = tzone_sy
  EXCEPTIONS
    customizing_missing = 1
    OTHERS              = 2.

然后获取用户时区：

  DATA tzone_ur TYPE TZNZONE.
  CALL FUNCTION 'TZON_GET_USER_TIMEZONE'
    EXPORTING
      if_username             = sy-uname
    IMPORTING
      ef_timezone             = tzone_ur
    EXCEPTIONS
      no_timezone_customizing = 1
      no_valid_user           = 2
      OTHERS                  = 3.

下面就是转换用到的两个函数了：

    DATA: timestamp TYPE timestamp,
          locatime TYPE sy-timlo.
    LOOP AT gt_list INTO ls_list.
      CLEAR: timestamp,locatime.
      CALL FUNCTION 'IB_CONVERT_INTO_TIMESTAMP'
        EXPORTING
          i_datlo     = ls_list-ersda
          i_timlo     = ls_list-erzet
          i_tzone     = tzone_sy
        IMPORTING
          e_timestamp = timestamp.

      CALL FUNCTION 'IB_CONVERT_FROM_TIMESTAMP'
        EXPORTING
          i_timestamp = timestamp
          i_tzone     = tzone_ur
        IMPORTING
          e_timlo     = locatime.
      ...
      ...
      ...
ENDLOOP.