ABAP Select data from SAP table E1TRXHD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1TRXHD 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 E1TRXHD. 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 E1TRXHD 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_E1TRXHD TYPE STANDARD TABLE OF E1TRXHD,
      WA_E1TRXHD TYPE E1TRXHD,
      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: <E1TRXHD> TYPE E1TRXHD.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1TRXHD.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1TRXHD
  INTO TABLE IT_E1TRXHD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1TRXHD
*  INTO TABLE @DATA(IT_E1TRXHD2).
*--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_E1TRXHD INDEX 1 INTO DATA(WA_E1TRXHD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1TRXHD ASSIGNING <E1TRXHD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1TRXHD>-EVTCD1 = 1.
<E1TRXHD>-EVTCD2 = 1.
<E1TRXHD>-SNDCOD = 1.
<E1TRXHD>-SNDID = 1.
<E1TRXHD>-SNDNAM = 1.

ENDLOOP.

LOOP AT IT_E1TRXHD INTO WA_E1TRXHD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1TRXHD-RCVCOD, sy-vline,
  WA_E1TRXHD-RCVID, sy-vline,
  WA_E1TRXHD-RCVNAM, sy-vline,
  WA_E1TRXHD-EVTDAT, sy-vline,
  WA_E1TRXHD-EVTTIM, sy-vline,
  WA_E1TRXHD-EVTZON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1TRXHD 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_E1TRXHD 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_E1TRXHD INTO WA_E1TRXHD.


*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_E1TRXHD_STR, 
EVTCD1 TYPE STRING,
EVTCD2 TYPE STRING,
SNDCOD TYPE STRING,
SNDID TYPE STRING,
SNDNAM TYPE STRING,
RCVCOD TYPE STRING,
RCVID TYPE STRING,
RCVNAM TYPE STRING,
EVTDAT TYPE STRING,
EVTTIM TYPE STRING,
EVTZON TYPE STRING,
EVTTST TYPE STRING,
REPDAT TYPE STRING,
REPTIM TYPE STRING,
REPZON TYPE STRING,
REPTST TYPE STRING,
LODSTS TYPE STRING,
MSGMOD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1TRXHD_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_E1TRXHD_STR-EVTCD1 sy-vline 
WA_E1TRXHD_STR-EVTCD2 sy-vline 
WA_E1TRXHD_STR-SNDCOD sy-vline 
WA_E1TRXHD_STR-SNDID sy-vline 
WA_E1TRXHD_STR-SNDNAM sy-vline 
WA_E1TRXHD_STR-RCVCOD sy-vline 
WA_E1TRXHD_STR-RCVID sy-vline 
WA_E1TRXHD_STR-RCVNAM sy-vline 
WA_E1TRXHD_STR-EVTDAT sy-vline 
WA_E1TRXHD_STR-EVTTIM sy-vline 
WA_E1TRXHD_STR-EVTZON sy-vline 
WA_E1TRXHD_STR-EVTTST sy-vline 
WA_E1TRXHD_STR-REPDAT sy-vline 
WA_E1TRXHD_STR-REPTIM sy-vline 
WA_E1TRXHD_STR-REPZON sy-vline 
WA_E1TRXHD_STR-REPTST sy-vline 
WA_E1TRXHD_STR-LODSTS sy-vline 
WA_E1TRXHD_STR-MSGMOD sy-vline      INTO ld_text SEPARATED BY SPACE.

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