ABAP Select data from SAP table U_15956 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP U_15956 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 U_15956. 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 U_15956 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_U_15956 TYPE STANDARD TABLE OF U_15956,
      WA_U_15956 TYPE U_15956,
      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: <U_15956> TYPE U_15956.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_U_15956.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM U_15956
  INTO TABLE IT_U_15956.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM U_15956
*  INTO TABLE @DATA(IT_U_159562).
*--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_U_15956 INDEX 1 INTO DATA(WA_U_159562).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_U_15956 ASSIGNING <U_15956>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<U_15956>-MANDT = 1.
<U_15956>-AKTNR = 1.
<U_15956>-SPRAS = 1.
<U_15956>-AKTYP = 1.
<U_15956>-AKART = 1.

ENDLOOP.

LOOP AT IT_U_15956 INTO WA_U_15956.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_U_15956-WAELA, sy-vline,
  WA_U_15956-WAERA, sy-vline,
  WA_U_15956-VGLAK, sy-vline,
  WA_U_15956-AKVST, sy-vline,
  WA_U_15956-AKAST, sy-vline,
  WA_U_15956-AKBST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_U_15956 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_U_15956 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_U_15956 INTO WA_U_15956.


*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.

*Conversion exit ALPHA, internal->external for field AKTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_15956-AKTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_15956-AKTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_U_15956-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_15956-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VGLAK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_15956-VGLAK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_15956-VGLAK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MELAK
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_U_15956-MELAK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_15956-MELAK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MELRA
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_U_15956-MELRA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_15956-MELRA.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

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

TYPES: BEGIN OF T_U_15956_STR, 
MANDT TYPE STRING,
AKTNR TYPE STRING,
SPRAS TYPE STRING,
AKTYP TYPE STRING,
AKART TYPE STRING,
WAELA TYPE STRING,
WAERA TYPE STRING,
VGLAK TYPE STRING,
AKVST TYPE STRING,
AKAST TYPE STRING,
AKBST TYPE STRING,
AKNBS TYPE STRING,
AKNFG TYPE STRING,
AKNBF TYPE STRING,
AKNTH TYPE STRING,
AKNPO TYPE STRING,
AKNWM TYPE STRING,
AKNTX TYPE STRING,
NEKKO TYPE STRING,
NVKKO TYPE STRING,
NARTS TYPE STRING,
ATNPO TYPE STRING,
VTART TYPE STRING,
EKDAB TYPE STRING,
EKDBI TYPE STRING,
VKDAB TYPE STRING,
VKDBI TYPE STRING,
ALIVO TYPE STRING,
ALIBI TYPE STRING,
SPDAB TYPE STRING,
SPGRU TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
PLUEP TYPE STRING,
PLUVP TYPE STRING,
PLMGE TYPE STRING,
PLANZ TYPE STRING,
MELAK TYPE STRING,
MELRA TYPE STRING,
PDUEP TYPE STRING,
PDUVP TYPE STRING,
PDMGE TYPE STRING,
PDANZ TYPE STRING,
VAUEP TYPE STRING,
VAUVP TYPE STRING,
VAMGE TYPE STRING,
RFIND TYPE STRING,
VAANZ TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
LISRE TYPE STRING,
VKGST TYPE STRING,
EKGST TYPE STRING,
BEKST TYPE STRING,
EKKON TYPE STRING,
VKKON TYPE STRING,
KOBOG TYPE STRING,
PLUEN TYPE STRING,
PDUEN TYPE STRING,
VAUEN TYPE STRING,
AKTKT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_U_15956_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_U_15956_STR-MANDT sy-vline 
WA_U_15956_STR-AKTNR sy-vline 
WA_U_15956_STR-SPRAS sy-vline 
WA_U_15956_STR-AKTYP sy-vline 
WA_U_15956_STR-AKART sy-vline 
WA_U_15956_STR-WAELA sy-vline 
WA_U_15956_STR-WAERA sy-vline 
WA_U_15956_STR-VGLAK sy-vline 
WA_U_15956_STR-AKVST sy-vline 
WA_U_15956_STR-AKAST sy-vline 
WA_U_15956_STR-AKBST sy-vline 
WA_U_15956_STR-AKNBS sy-vline 
WA_U_15956_STR-AKNFG sy-vline 
WA_U_15956_STR-AKNBF sy-vline 
WA_U_15956_STR-AKNTH sy-vline 
WA_U_15956_STR-AKNPO sy-vline 
WA_U_15956_STR-AKNWM sy-vline 
WA_U_15956_STR-AKNTX sy-vline 
WA_U_15956_STR-NEKKO sy-vline 
WA_U_15956_STR-NVKKO sy-vline 
WA_U_15956_STR-NARTS sy-vline 
WA_U_15956_STR-ATNPO sy-vline 
WA_U_15956_STR-VTART sy-vline 
WA_U_15956_STR-EKDAB sy-vline 
WA_U_15956_STR-EKDBI sy-vline 
WA_U_15956_STR-VKDAB sy-vline 
WA_U_15956_STR-VKDBI sy-vline 
WA_U_15956_STR-ALIVO sy-vline 
WA_U_15956_STR-ALIBI sy-vline 
WA_U_15956_STR-SPDAB sy-vline 
WA_U_15956_STR-SPGRU sy-vline 
WA_U_15956_STR-EKORG sy-vline 
WA_U_15956_STR-EKGRP sy-vline 
WA_U_15956_STR-VKORG sy-vline 
WA_U_15956_STR-VTWEG sy-vline 
WA_U_15956_STR-PLUEP sy-vline 
WA_U_15956_STR-PLUVP sy-vline 
WA_U_15956_STR-PLMGE sy-vline 
WA_U_15956_STR-PLANZ sy-vline 
WA_U_15956_STR-MELAK sy-vline 
WA_U_15956_STR-MELRA sy-vline 
WA_U_15956_STR-PDUEP sy-vline 
WA_U_15956_STR-PDUVP sy-vline 
WA_U_15956_STR-PDMGE sy-vline 
WA_U_15956_STR-PDANZ sy-vline 
WA_U_15956_STR-VAUEP sy-vline 
WA_U_15956_STR-VAUVP sy-vline 
WA_U_15956_STR-VAMGE sy-vline 
WA_U_15956_STR-RFIND sy-vline 
WA_U_15956_STR-VAANZ sy-vline 
WA_U_15956_STR-ERNAM sy-vline 
WA_U_15956_STR-ERDAT sy-vline 
WA_U_15956_STR-AENAM sy-vline 
WA_U_15956_STR-AEDAT sy-vline 
WA_U_15956_STR-LISRE sy-vline 
WA_U_15956_STR-VKGST sy-vline 
WA_U_15956_STR-EKGST sy-vline 
WA_U_15956_STR-BEKST sy-vline 
WA_U_15956_STR-EKKON sy-vline 
WA_U_15956_STR-VKKON sy-vline 
WA_U_15956_STR-KOBOG sy-vline 
WA_U_15956_STR-PLUEN sy-vline 
WA_U_15956_STR-PDUEN sy-vline 
WA_U_15956_STR-VAUEN sy-vline 
WA_U_15956_STR-AKTKT sy-vline      INTO ld_text SEPARATED BY SPACE.

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