Created by Jerry Wang, last modified on Apr 22, 2014

使用如下report 测试IBASE write buffer:

PARAMETERS: id TYPE ibap_head1-ibase OBLIGATORY DEFAULT '3314',
txt TYPE ibib1-extid OBLIGATORY DEFAULT 'c by code'.

DATA: ls_ibib           TYPE ibib1,
       ls_header         TYPE ibap_head1,
        ls_ibibt          TYPE ibibt1.

ls_header-ibase = '3314'.

CALL FUNCTION 'CRM_IBASE_GET_DETAIL'
    EXPORTING
      i_ibase_head  = ls_header
      i_level_down  = 1
    IMPORTING
      e_ibib1       = ls_ibib
      e_ibibt1      = ls_ibibt
    EXCEPTIONS
      not_specified = 1
      doesnt_exist  = 2
      no_authority  = 3
      OTHERS        = 4.

assert sy-subrc = 0.

ls_ibib-extid = txt.

CALL FUNCTION 'CRM_IBASE_CHANGE'
    EXPORTING
      i_ibase_head        = ls_header
      i_ibib1             = ls_ibib
      i_ibibt1            = ls_ibibt
    EXCEPTIONS
      data_not_consistent = 1
      ibase_locked        = 2
      not_succesful       = 3
      no_authority        = 4
      OTHERS              = 5.

case sy-subrc.
  WHEN 0.
     WRITE: / 'change successful' COLOR COL_GROUP.
  WHEN 1.
     WRITE: / 'data not consistent' COLOR COL_NEGATIVE.
  WHEN 2.
     WRITE: / 'IBASE locked' COLOR COL_NEGATIVE.
  WHEN 3.
     WRITE: / 'change failed' COLOR COL_NEGATIVE.
  WHEN 4.
     WRITE: / 'no authorization' COLOR COL_NEGATIVE.
ENDCASE.

执行report:

首先从DB读取IBASE header 内容，填充read buffer. 此时write buffer( PROC_TAB )为空:

此处将最新的change 插入到write buffer:

read buffer的数据来自DB， external ID为空:

write buffer的值是report 传入的最新的external ID:

function group IBIBF里的function module执行完毕之后的buffer状态:

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