ALV Grid字段长度被限制

如果每个字段要显示长文本内容，很可能ALV显示会被截断，这是系统标准行为，不能通过任何参数改变，但是不影响导出Execl值。业务部门一般都是alv执行结果导出到Execl，所以影响不大。

Note 857823 - ALV grid: Strings with a maximum of 128 characters
  
   The column length in ALV has a maxmium 128 characters. Note 857823 has the detail. Below is the detail from SAP.

Symptom
Entries in cells of the type CHAR or string are truncated after 128 characters in the SAP GUI.
Other terms
ALV Grid Control (cl_gui_alv_grid), function module (Full-screen) Grid (Reuse_alv_grid_display, SAPLSLVC_FULLSCREEN), SAPGUI, back end, front end

Reason and Prerequisites
The data table that is sent to the frontend only allows character values with the length 128.

Solution
This is the standard system behavior and cannot be changed.