Dynamic Table Maintainance

REPORT ZDEMO NO STANDARD PAGE HEADING.
TYPE-POOLS: rsds.
DATA: is_x030l TYPE x030l,
it_dfies TYPE TABLE OF dfies,
is_dfies TYPE dfies,
it_fdiff TYPE TABLE OF field_dif,
is_fdiff TYPE field_dif.
DATA: w_selid TYPE rsdynsel-selid,
it_tables TYPE TABLE OF rsdstabs,
is_tables TYPE rsdstabs,
it_fields TYPE TABLE OF rsdsfields,
it_expr TYPE rsds_texpr,
it_ranges TYPE rsds_trange,
it_where TYPE rsds_twhere,
is_where TYPE rsds_where,
w_active TYPE i.
DATA: it_content TYPE REF TO data,
it_modif TYPE REF TO data,
it_fcat TYPE lvc_t_fcat.
DATA: w_okcode TYPE sy-ucomm.

FIELD-SYMBOLS: TYPE STANDARD TABLE,
TYPE STANDARD TABLE.

* Macros
DEFINE table_error.
message e398(00) with 'Table' p_table &1.
END-OF-DEFINITION.
DEFINE fixed_val.
is_fdiff-fieldname = is_dfies-fieldname.
is_fdiff-fixed_val = &1.
is_fdiff-no_input = 'X'.
append is_fdiff to it_fdiff.
END-OF-DEFINITION.

* Selection screen
SELECTION-SCREEN: BEGIN OF BLOCK b01 WITH FRAME.
PARAMETERS: p_table TYPE tabname OBLIGATORY "table
MEMORY ID dtb
MATCHCODE OBJECT dd_dbtb_16.
SELECTION-SCREEN: BEGIN OF LINE,
PUSHBUTTON 33(20) selopt USER-COMMAND sel,
COMMENT 55(15) selcnt,
END OF LINE.
SELECTION-SCREEN: SKIP.
PARAMETERS: p_rows TYPE i. "rows
SELECTION-SCREEN: END OF BLOCK b01,
SKIP,
BEGIN OF BLOCK b02 WITH FRAME.
PARAMETERS: p_displ TYPE c AS CHECKBOX. "display
SELECTION-SCREEN: END OF BLOCK b02.
* Initialization
INITIALIZATION.
MOVE '@4G@ Filter records' TO selopt.
* PBO
AT SELECTION-SCREEN OUTPUT.
IF w_active IS INITIAL.
CLEAR: selcnt.
ELSE.
WRITE w_active TO selcnt LEFT-JUSTIFIED.
ENDIF.
* PAI
AT SELECTION-SCREEN.
IF p_table NE is_x030l-tabname.
CALL FUNCTION 'DDIF_NAMETAB_GET'
EXPORTING
tabname = p_table
IMPORTING
x030l_wa = is_x030l
TABLES
dfies_tab = it_dfies
EXCEPTIONS
OTHERS = 1.
IF is_x030l IS INITIAL.
table_error 'does not exist or is not active'.
ELSEIF is_x030l-tabtype NE 'T'.
table_error 'is not selectable'.
ELSEIF is_x030l-align NE 0.
table_error 'has alignment - cannot continue'.
ENDIF.
* Default values for system fields
REFRESH: it_fdiff.
is_fdiff-tabname = p_table.
LOOP AT it_dfies INTO is_dfies.
IF is_dfies-datatype = 'CLNT'.
fixed_val sy-mandt.
ELSEIF is_dfies-rollname = 'ERDAT'
OR is_dfies-rollname = 'ERSDA'
OR is_dfies-rollname = 'AEDAT'
OR is_dfies-rollname = 'LAEDA'.
fixed_val sy-datum.
ELSEIF is_dfies-rollname = 'ERTIM'
OR is_dfies-rollname = 'AETIM'.
fixed_val sy-uzeit.
ELSEIF is_dfies-rollname = 'ERNAM'
OR is_dfies-rollname = 'AENAM'.
fixed_val sy-uname.
ENDIF.
ENDLOOP.
* Prepare free selection on table
REFRESH it_tables.
is_tables-prim_tab = p_table.
APPEND is_tables TO it_tables.
CLEAR: w_selid.
ENDIF.
IF sy-ucomm = 'SEL'.
IF w_selid IS INITIAL.
* Init free selection dialog
CALL FUNCTION 'FREE_SELECTIONS_INIT'
EXPORTING
expressions = it_expr
IMPORTING
selection_id = w_selid
expressions = it_expr
TABLES
tables_tab = it_tables
EXCEPTIONS
OTHERS = 1.
ENDIF.
* Display free selection dialog
CALL FUNCTION 'FREE_SELECTIONS_DIALOG'
EXPORTING
selection_id = w_selid
title = 'Selection'
status = 1
as_window = 'X'
IMPORTING
expressions = it_expr
field_ranges = it_ranges
number_of_active_fields = w_active
TABLES
fields_tab = it_fields
EXCEPTIONS
OTHERS = 1.
ENDIF.

* Start of processing
START-OF-SELECTION.
PERFORM f_create_table USING p_table.
PERFORM f_select_table.
PERFORM f_display_table.

*---------------------------------------------------------------------*
* FORM f_create_table *
*---------------------------------------------------------------------*
FORM f_create_table USING in_tabname.
FIELD-SYMBOLS: TYPE lvc_s_fcat.
CALL FUNCTION 'LVC_FIELDCATALOG_MERGE'
EXPORTING
i_structure_name = in_tabname
CHANGING
ct_fieldcat = it_fcat
EXCEPTIONS
OTHERS = 1.
IF sy-subrc = 0.
* Complete field catalog
LOOP AT it_fcat ASSIGNING .
-tabname = in_tabname.
ENDLOOP.
CALL FUNCTION 'LVC_FIELDCAT_COMPLETE'
CHANGING
ct_fieldcat = it_fcat
EXCEPTIONS
OTHERS = 1.
ELSE.
WRITE: 'Error building field catalog'.
STOP.
ENDIF.
* Create dynamic table for data
CALL METHOD cl_alv_table_create=>create_dynamic_table
EXPORTING
it_fieldcatalog = it_fcat
IMPORTING
ep_table = it_content.
IF sy-subrc = 0.
ASSIGN it_content->* TO .
ELSE.
WRITE: 'Error creating internal table'.
STOP.
ENDIF.
* Create dynamic table for modif
CALL METHOD cl_alv_table_create=>create_dynamic_table
EXPORTING
it_fieldcatalog = it_fcat
IMPORTING
ep_table = it_modif.
IF sy-subrc = 0.
ASSIGN it_modif->* TO .
ELSE.
WRITE: 'Error creating internal table'.
STOP.
ENDIF.
ENDFORM.

*---------------------------------------------------------------------*
* FORM f_select_table *
*---------------------------------------------------------------------*
FORM f_select_table.
IF w_active = 0.
SELECT * FROM (p_table)
INTO CORRESPONDING FIELDS OF TABLE
UP TO p_rows ROWS.
ELSE.
* Selection with parameters
CALL FUNCTION 'FREE_SELECTIONS_RANGE_2_WHERE'
EXPORTING
field_ranges = it_ranges
IMPORTING
where_clauses = it_where.
READ TABLE it_where INTO is_where WITH KEY tablename = p_table.
SELECT * FROM (p_table)
INTO CORRESPONDING FIELDS OF TABLE
UP TO p_rows ROWS
WHERE (is_where-where_tab).
ENDIF.
IF sy-dbcnt = 0.
WRITE: 'No record selected'.
STOP.
ENDIF.
ENDFORM.

*---------------------------------------------------------------------*
* FORM f_display_table *
*---------------------------------------------------------------------*
FORM f_display_table.
DATA: l_answer TYPE c,
l_eflag TYPE c.
CLEAR: w_okcode.
REFRESH: .
* Display table contents
CALL FUNCTION 'STC1_FULLSCREEN_TABLE_CONTROL'
EXPORTING
header = p_table
tabname = p_table
display_only = p_displ
endless = 'X'
no_button = space
IMPORTING
okcode = w_okcode
TABLES
nametab = it_dfies
table =
fielddif = it_fdiff
modif_table =
EXCEPTIONS
OTHERS = 1.
IF sy-subrc = 0.
IF p_displ IS INITIAL AND w_okcode = 'SAVE'.
* Confirm update
CALL FUNCTION 'POPUP_TO_CONFIRM'
EXPORTING
titlebar = p_table
text_question = 'Do you want to update table ?'
default_button = '2'
display_cancel_button = ' '
IMPORTING
answer = l_answer
EXCEPTIONS
OTHERS = 1.
IF l_answer = '1'.
* Apply modifications
IF NOT [] IS INITIAL.
PERFORM f_add_system USING space.
MODIFY (p_table) FROM TABLE .
IF sy-subrc NE 0.
l_eflag = 'X'.
ENDIF.
ENDIF.
* Apply deletions
IF l_eflag IS INITIAL.
REFRESH: .
CALL FUNCTION 'STC1_GET_DATA'
TABLES
deleted_data =
EXCEPTIONS
OTHERS = 1.
IF NOT [] IS INITIAL.
DELETE (p_table) FROM TABLE .
IF sy-subrc NE 0.
ROLLBACK WORK.
l_eflag = 'X'.
ENDIF.
ENDIF.
ENDIF.
* Apply creations
IF l_eflag IS INITIAL.
REFRESH: .
CALL FUNCTION 'STC1_GET_DATA'
TABLES
new_data =
EXCEPTIONS
OTHERS = 1.
IF NOT [] IS INITIAL.
PERFORM f_add_system USING 'X'.
INSERT (p_table) FROM TABLE .
IF sy-subrc NE 0.
ROLLBACK WORK.
l_eflag = 'X'.
ENDIF.
ENDIF.
ENDIF.
IF l_eflag IS INITIAL.
COMMIT WORK.
MESSAGE s261(53).
ELSE.
MESSAGE s075(3i).
PERFORM f_select_table.
ENDIF.
ENDIF.
* Display table again
PERFORM f_display_table.
ENDIF.
ENDIF.
ENDFORM.

*---------------------------------------------------------------------*
* FORM f_add_system *
*---------------------------------------------------------------------*
FORM f_add_system USING new TYPE c.
FIELD-SYMBOLS: TYPE ANY,
TYPE ANY.
LOOP AT it_fdiff INTO is_fdiff.
READ TABLE it_dfies INTO is_dfies
WITH KEY fieldname = is_fdiff-fieldname.
LOOP AT ASSIGNING .
ASSIGN COMPONENT is_fdiff-fieldname OF STRUCTURE TO .
IF is_dfies-datatype = 'CLNT'.
= sy-mandt.
ELSE.
CASE is_dfies-rollname.
WHEN 'AENAM'.
= sy-uname.
WHEN 'AEDAT' OR 'LAEDA'.
= sy-datum.
WHEN 'AETIM'.
= sy-uzeit.
WHEN OTHERS.
ENDCASE.
ENDIF.
ENDLOOP.
ENDLOOP.
ENDFORM.