in initial display of ALV report, user selects few columns, for the selected columns i need to do some calculations. I provide a new button on toolbar for this calculation. Here i am able to get the selected columns using method GET_SELECTED_COLUMNS of class CL_GUI_ALV_GRID. here i need to check the selected column should not be of type date, time, string and char. Only of type NUMC. Now after this validation, i need to build field catalogue for the selected columns and internal table of same selected columns. Finally i need to fill the data into new internal table by making use of initial displayed internal table data in ALV report. Hope its clear.
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