Automatically from a Dictionary Structure/Table The easiest way — ALV can build the field catalog from the DDIC (Data Dictionary). You just pass the internal table reference. ALV uses the metadata (field labels, data type, length) from DDIC. Example: CALL ...
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DATA: lo_splitter TYPE REF TO cl_gui_splitter_container, lo_container1 TYPE REF TO cl_gui_container, lo_container2 TYPE REF TO cl_gui_container. DATA: lo_alv1 TYPE REF TO ...