ABAP Select data from SAP table ALV_S_FCAT_WP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ALV_S_FCAT_WP table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to ALV_S_FCAT_WP. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the ALV_S_FCAT_WP table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_ALV_S_FCAT_WP TYPE STANDARD TABLE OF ALV_S_FCAT_WP,
      WA_ALV_S_FCAT_WP TYPE ALV_S_FCAT_WP,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <ALV_S_FCAT_WP> TYPE ALV_S_FCAT_WP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ALV_S_FCAT_WP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ALV_S_FCAT_WP
  INTO TABLE IT_ALV_S_FCAT_WP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ALV_S_FCAT_WP
*  INTO TABLE @DATA(IT_ALV_S_FCAT_WP2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_ALV_S_FCAT_WP INDEX 1 INTO DATA(WA_ALV_S_FCAT_WP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ALV_S_FCAT_WP ASSIGNING <ALV_S_FCAT_WP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ALV_S_FCAT_WP>-FIELDNAME = 1.
<ALV_S_FCAT_WP>-POSITION = 1.
<ALV_S_FCAT_WP>-FIELDTEXT = 1.
<ALV_S_FCAT_WP>-HEADERTEXT = 1.
<ALV_S_FCAT_WP>-EMPTYHEADERTEXT = 1.

ENDLOOP.

LOOP AT IT_ALV_S_FCAT_WP INTO WA_ALV_S_FCAT_WP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ALV_S_FCAT_WP-HEADER_TOOLTIP, sy-vline,
  WA_ALV_S_FCAT_WP-FIELDTEXT_DDIC, sy-vline,
  WA_ALV_S_FCAT_WP-HEADERTEXT_DDIC, sy-vline,
  WA_ALV_S_FCAT_WP-REF_TABNAME, sy-vline,
  WA_ALV_S_FCAT_WP-REF_FIELDNAME, sy-vline,
  WA_ALV_S_FCAT_WP-INTTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ALV_S_FCAT_WP you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_ALV_S_FCAT_WP TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_ALV_S_FCAT_WP INTO WA_ALV_S_FCAT_WP.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ALV_S_FCAT_WP_STR, 
FIELDNAME TYPE STRING,
POSITION TYPE STRING,
FIELDTEXT TYPE STRING,
HEADERTEXT TYPE STRING,
EMPTYHEADERTEXT TYPE STRING,
HEADER_TOOLTIP TYPE STRING,
FIELDTEXT_DDIC TYPE STRING,
HEADERTEXT_DDIC TYPE STRING,
REF_TABNAME TYPE STRING,
REF_FIELDNAME TYPE STRING,
INTTYPE TYPE STRING,
INVISIBLE TYPE STRING,
DISPTYPE TYPE STRING,
DISABLED TYPE STRING,
TEXTWRAP TYPE STRING,
NO_SIGN TYPE STRING,
NO_ZERO TYPE STRING,
DEC_OUT TYPE STRING,
DEC_OUT_FORCE TYPE STRING,
ENCODE TYPE STRING,
ENCODECOLT TYPE STRING,
HALIGN TYPE STRING,
VALIGN TYPE STRING,
APPUNIT TYPE STRING,
UNIT TYPE STRING,
UNITFNAME TYPE STRING,
UNITTYPE TYPE STRING,
LINKFNAME TYPE STRING,
LINKTYPE TYPE STRING,
CELLSTYLEFNAME TYPE STRING,
TOOLTIP_FNAME TYPE STRING,
CONVEXIT TYPE STRING,
IMAGEPATH TYPE STRING,
ICON TYPE STRING,
DO_SUM TYPE STRING,
EDIT TYPE STRING,
TECH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ALV_S_FCAT_WP_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_ALV_S_FCAT_WP_STR-FIELDNAME sy-vline 
WA_ALV_S_FCAT_WP_STR-POSITION sy-vline 
WA_ALV_S_FCAT_WP_STR-FIELDTEXT sy-vline 
WA_ALV_S_FCAT_WP_STR-HEADERTEXT sy-vline 
WA_ALV_S_FCAT_WP_STR-EMPTYHEADERTEXT sy-vline 
WA_ALV_S_FCAT_WP_STR-HEADER_TOOLTIP sy-vline 
WA_ALV_S_FCAT_WP_STR-FIELDTEXT_DDIC sy-vline 
WA_ALV_S_FCAT_WP_STR-HEADERTEXT_DDIC sy-vline 
WA_ALV_S_FCAT_WP_STR-REF_TABNAME sy-vline 
WA_ALV_S_FCAT_WP_STR-REF_FIELDNAME sy-vline 
WA_ALV_S_FCAT_WP_STR-INTTYPE sy-vline 
WA_ALV_S_FCAT_WP_STR-INVISIBLE sy-vline 
WA_ALV_S_FCAT_WP_STR-DISPTYPE sy-vline 
WA_ALV_S_FCAT_WP_STR-DISABLED sy-vline 
WA_ALV_S_FCAT_WP_STR-TEXTWRAP sy-vline 
WA_ALV_S_FCAT_WP_STR-NO_SIGN sy-vline 
WA_ALV_S_FCAT_WP_STR-NO_ZERO sy-vline 
WA_ALV_S_FCAT_WP_STR-DEC_OUT sy-vline 
WA_ALV_S_FCAT_WP_STR-DEC_OUT_FORCE sy-vline 
WA_ALV_S_FCAT_WP_STR-ENCODE sy-vline 
WA_ALV_S_FCAT_WP_STR-ENCODECOLT sy-vline 
WA_ALV_S_FCAT_WP_STR-HALIGN sy-vline 
WA_ALV_S_FCAT_WP_STR-VALIGN sy-vline 
WA_ALV_S_FCAT_WP_STR-APPUNIT sy-vline 
WA_ALV_S_FCAT_WP_STR-UNIT sy-vline 
WA_ALV_S_FCAT_WP_STR-UNITFNAME sy-vline 
WA_ALV_S_FCAT_WP_STR-UNITTYPE sy-vline 
WA_ALV_S_FCAT_WP_STR-LINKFNAME sy-vline 
WA_ALV_S_FCAT_WP_STR-LINKTYPE sy-vline 
WA_ALV_S_FCAT_WP_STR-CELLSTYLEFNAME sy-vline 
WA_ALV_S_FCAT_WP_STR-TOOLTIP_FNAME sy-vline 
WA_ALV_S_FCAT_WP_STR-CONVEXIT sy-vline 
WA_ALV_S_FCAT_WP_STR-IMAGEPATH sy-vline 
WA_ALV_S_FCAT_WP_STR-ICON sy-vline 
WA_ALV_S_FCAT_WP_STR-DO_SUM sy-vline 
WA_ALV_S_FCAT_WP_STR-EDIT sy-vline 
WA_ALV_S_FCAT_WP_STR-TECH sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.