ABAP Select data from SAP table DICS_T156F into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP DICS_T156F 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 DICS_T156F. 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 DICS_T156F 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_DICS_T156F TYPE STANDARD TABLE OF DICS_T156F,
      WA_DICS_T156F TYPE DICS_T156F,
      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: <DICS_T156F> TYPE DICS_T156F.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DICS_T156F.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DICS_T156F
  INTO TABLE IT_DICS_T156F.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DICS_T156F
*  INTO TABLE @DATA(IT_DICS_T156F2).
*--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_DICS_T156F INDEX 1 INTO DATA(WA_DICS_T156F2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DICS_T156F ASSIGNING <DICS_T156F>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DICS_T156F>-SEGST = 1.
<DICS_T156F>-CNT02 = 1.
<DICS_T156F>-FELDV = 1.
<DICS_T156F>-FELDS = 1.
<DICS_T156F>-FELDM = 1.

ENDLOOP.

LOOP AT IT_DICS_T156F INTO WA_DICS_T156F.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DICS_T156F-FELDL, sy-vline,
  WA_DICS_T156F-XLEIT, sy-vline,
  WA_DICS_T156F-KZARI, sy-vline,
  WA_DICS_T156F-XDBUP, sy-vline,
  WA_DICS_T156F-XRUEM, sy-vline,
  WA_DICS_T156F-XBPME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DICS_T156F 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_DICS_T156F 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_DICS_T156F INTO WA_DICS_T156F.


*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_DICS_T156F_STR, 
SEGST TYPE STRING,
CNT02 TYPE STRING,
FELDV TYPE STRING,
FELDS TYPE STRING,
FELDM TYPE STRING,
FELDL TYPE STRING,
XLEIT TYPE STRING,
KZARI TYPE STRING,
XDBUP TYPE STRING,
XRUEM TYPE STRING,
XBPME TYPE STRING,
XBSME TYPE STRING,
XVKWR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DICS_T156F_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_DICS_T156F_STR-SEGST sy-vline 
WA_DICS_T156F_STR-CNT02 sy-vline 
WA_DICS_T156F_STR-FELDV sy-vline 
WA_DICS_T156F_STR-FELDS sy-vline 
WA_DICS_T156F_STR-FELDM sy-vline 
WA_DICS_T156F_STR-FELDL sy-vline 
WA_DICS_T156F_STR-XLEIT sy-vline 
WA_DICS_T156F_STR-KZARI sy-vline 
WA_DICS_T156F_STR-XDBUP sy-vline 
WA_DICS_T156F_STR-XRUEM sy-vline 
WA_DICS_T156F_STR-XBPME sy-vline 
WA_DICS_T156F_STR-XBSME sy-vline 
WA_DICS_T156F_STR-XVKWR sy-vline      INTO ld_text SEPARATED BY SPACE.

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