ABAP Select data from SAP table E1S2K41 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1S2K41 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 E1S2K41. 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 E1S2K41 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_E1S2K41 TYPE STANDARD TABLE OF E1S2K41,
      WA_E1S2K41 TYPE E1S2K41,
      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: <E1S2K41> TYPE E1S2K41.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1S2K41.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1S2K41
  INTO TABLE IT_E1S2K41.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1S2K41
*  INTO TABLE @DATA(IT_E1S2K412).
*--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_E1S2K41 INDEX 1 INTO DATA(WA_E1S2K412).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1S2K41 ASSIGNING <E1S2K41>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1S2K41>-COCODE = 1.
<E1S2K41>-CUS = 1.
<E1S2K41>-SPL = 1.
<E1S2K41>-CPO = 1.
<E1S2K41>-PNR = 1.

ENDLOOP.

LOOP AT IT_E1S2K41 INTO WA_E1S2K41.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1S2K41-INV, sy-vline,
  WA_E1S2K41-INQ, sy-vline,
  WA_E1S2K41-UNT, sy-vline,
  WA_E1S2K41-UNP, sy-vline,
  WA_E1S2K41-IND, sy-vline,
  WA_E1S2K41-INA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1S2K41 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_E1S2K41 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_E1S2K41 INTO WA_E1S2K41.


*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_E1S2K41_STR, 
COCODE TYPE STRING,
CUS TYPE STRING,
SPL TYPE STRING,
CPO TYPE STRING,
PNR TYPE STRING,
INV TYPE STRING,
INQ TYPE STRING,
UNT TYPE STRING,
UNP TYPE STRING,
IND TYPE STRING,
INA TYPE STRING,
ITC TYPE STRING,
PAY TYPE STRING,
ICR TYPE STRING,
SHT TYPE STRING,
PSN TYPE STRING,
BOL TYPE STRING,
PDP TYPE STRING,
TXL TYPE STRING,
TXS TYPE STRING,
TXC TYPE STRING,
TRN TYPE STRING,
SPD TYPE STRING,
TAX TYPE STRING,
ADS TYPE STRING,
RIN TYPE STRING,
HTC TYPE STRING,
VRN TYPE STRING,
ACK TYPE STRING,
BELIV TYPE STRING,
SUPLC TYPE STRING,
PARTN TYPE STRING,
DOCIV TYPE STRING,
POSIV TYPE STRING,
BELPO TYPE STRING,
POSPO TYPE STRING,
DOCPO TYPE STRING,
MFRPN TYPE STRING,
MENGE TYPE STRING,
MENEE TYPE STRING,
PREIS TYPE STRING,
DATUM TYPE STRING,
NETWR TYPE STRING,
CURCY TYPE STRING,
EWERK TYPE STRING,
BOLNR TYPE STRING,
BSART TYPE STRING,
PACSN TYPE STRING,
TXLPR TYPE STRING,
TXCPR TYPE STRING,
TXSPR TYPE STRING,
TOTTX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1S2K41_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_E1S2K41_STR-COCODE sy-vline 
WA_E1S2K41_STR-CUS sy-vline 
WA_E1S2K41_STR-SPL sy-vline 
WA_E1S2K41_STR-CPO sy-vline 
WA_E1S2K41_STR-PNR sy-vline 
WA_E1S2K41_STR-INV sy-vline 
WA_E1S2K41_STR-INQ sy-vline 
WA_E1S2K41_STR-UNT sy-vline 
WA_E1S2K41_STR-UNP sy-vline 
WA_E1S2K41_STR-IND sy-vline 
WA_E1S2K41_STR-INA sy-vline 
WA_E1S2K41_STR-ITC sy-vline 
WA_E1S2K41_STR-PAY sy-vline 
WA_E1S2K41_STR-ICR sy-vline 
WA_E1S2K41_STR-SHT sy-vline 
WA_E1S2K41_STR-PSN sy-vline 
WA_E1S2K41_STR-BOL sy-vline 
WA_E1S2K41_STR-PDP sy-vline 
WA_E1S2K41_STR-TXL sy-vline 
WA_E1S2K41_STR-TXS sy-vline 
WA_E1S2K41_STR-TXC sy-vline 
WA_E1S2K41_STR-TRN sy-vline 
WA_E1S2K41_STR-SPD sy-vline 
WA_E1S2K41_STR-TAX sy-vline 
WA_E1S2K41_STR-ADS sy-vline 
WA_E1S2K41_STR-RIN sy-vline 
WA_E1S2K41_STR-HTC sy-vline 
WA_E1S2K41_STR-VRN sy-vline 
WA_E1S2K41_STR-ACK sy-vline 
WA_E1S2K41_STR-BELIV sy-vline 
WA_E1S2K41_STR-SUPLC sy-vline 
WA_E1S2K41_STR-PARTN sy-vline 
WA_E1S2K41_STR-DOCIV sy-vline 
WA_E1S2K41_STR-POSIV sy-vline 
WA_E1S2K41_STR-BELPO sy-vline 
WA_E1S2K41_STR-POSPO sy-vline 
WA_E1S2K41_STR-DOCPO sy-vline 
WA_E1S2K41_STR-MFRPN sy-vline 
WA_E1S2K41_STR-MENGE sy-vline 
WA_E1S2K41_STR-MENEE sy-vline 
WA_E1S2K41_STR-PREIS sy-vline 
WA_E1S2K41_STR-DATUM sy-vline 
WA_E1S2K41_STR-NETWR sy-vline 
WA_E1S2K41_STR-CURCY sy-vline 
WA_E1S2K41_STR-EWERK sy-vline 
WA_E1S2K41_STR-BOLNR sy-vline 
WA_E1S2K41_STR-BSART sy-vline 
WA_E1S2K41_STR-PACSN sy-vline 
WA_E1S2K41_STR-TXLPR sy-vline 
WA_E1S2K41_STR-TXCPR sy-vline 
WA_E1S2K41_STR-TXSPR sy-vline 
WA_E1S2K41_STR-TOTTX sy-vline      INTO ld_text SEPARATED BY SPACE.

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