ABAP Select data from SAP table GOHEAD into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP GOHEAD 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 GOHEAD. 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 GOHEAD 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_GOHEAD TYPE STANDARD TABLE OF GOHEAD,
      WA_GOHEAD TYPE GOHEAD,
      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: <GOHEAD> TYPE GOHEAD.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GOHEAD
*  INTO TABLE @DATA(IT_GOHEAD2).
*--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_GOHEAD INDEX 1 INTO DATA(WA_GOHEAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GOHEAD>-MBLNR = 1.
<GOHEAD>-MJAHR = 1.
<GOHEAD>-BLDAT = 1.
<GOHEAD>-BUDAT = 1.
<GOHEAD>-XBLNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GOHEAD-BKTXT, sy-vline,
  WA_GOHEAD-FRBNR, sy-vline,
  WA_GOHEAD-XABLN, sy-vline,
  WA_GOHEAD-EXNUM, sy-vline,
  WA_GOHEAD-LIFNR, sy-vline,
  WA_GOHEAD-VENDORNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GOHEAD 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_GOHEAD 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_GOHEAD INTO WA_GOHEAD.


*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 MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GOHEAD-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GOHEAD-MBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_GOHEAD-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GOHEAD-MJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit SXIDN, internal->external for field POUSERNAME
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_GOHEAD-POUSERNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GOHEAD-POUSERNAME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field BUYER
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_GOHEAD-BUYER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GOHEAD-BUYER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field USERNAME
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_GOHEAD-USERNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GOHEAD-USERNAME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field CREATEDBY
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_GOHEAD-CREATEDBY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GOHEAD-CREATEDBY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GOHEAD-AWSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GOHEAD-AWSYS.
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_GOHEAD_STR, 
MBLNR TYPE STRING,
MJAHR TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
XBLNR TYPE STRING,
BKTXT TYPE STRING,
FRBNR TYPE STRING,
XABLN TYPE STRING,
EXNUM TYPE STRING,
LIFNR TYPE STRING,
VENDORNAME TYPE STRING,
VENDORZIP TYPE STRING,
VENDORADD TYPE STRING,
EMLIF TYPE STRING,
RECVENDNAME TYPE STRING,
LLIEF TYPE STRING,
SUPVENDNAME TYPE STRING,
EKGRP TYPE STRING,
EKORG TYPE STRING,
POUSER TYPE STRING,
TELPOUSER TYPE STRING,
POUSERNAME TYPE STRING,
BSAKZ TYPE STRING,
BUYER TYPE STRING,
TELNR1 TYPE STRING,
RESWK TYPE STRING,
RESWKNAME TYPE STRING,
USERNAME TYPE STRING,
TELNR2 TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
TZONE TYPE STRING,
AEDAT TYPE STRING,
USNAM TYPE STRING,
CREATEDBY TYPE STRING,
TELUSNAM TYPE STRING,
TCODE2 TYPE STRING,
TTEXT TYPE STRING,
LFSNR TYPE STRING,
XNAPR TYPE STRING,
WEVER TYPE STRING,
AWSYS TYPE STRING,
LOGLEVEL TYPE STRING,
LAND1 TYPE STRING,
CREATE_DELIVERY TYPE STRING,
MTSNR TYPE STRING,
XBLNR_MANUAL TYPE STRING,
FRBNR_MANUAL TYPE STRING,
GTS_CUSREF_NO TYPE STRING,
MUEBS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GOHEAD_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_GOHEAD_STR-MBLNR sy-vline 
WA_GOHEAD_STR-MJAHR sy-vline 
WA_GOHEAD_STR-BLDAT sy-vline 
WA_GOHEAD_STR-BUDAT sy-vline 
WA_GOHEAD_STR-XBLNR sy-vline 
WA_GOHEAD_STR-BKTXT sy-vline 
WA_GOHEAD_STR-FRBNR sy-vline 
WA_GOHEAD_STR-XABLN sy-vline 
WA_GOHEAD_STR-EXNUM sy-vline 
WA_GOHEAD_STR-LIFNR sy-vline 
WA_GOHEAD_STR-VENDORNAME sy-vline 
WA_GOHEAD_STR-VENDORZIP sy-vline 
WA_GOHEAD_STR-VENDORADD sy-vline 
WA_GOHEAD_STR-EMLIF sy-vline 
WA_GOHEAD_STR-RECVENDNAME sy-vline 
WA_GOHEAD_STR-LLIEF sy-vline 
WA_GOHEAD_STR-SUPVENDNAME sy-vline 
WA_GOHEAD_STR-EKGRP sy-vline 
WA_GOHEAD_STR-EKORG sy-vline 
WA_GOHEAD_STR-POUSER sy-vline 
WA_GOHEAD_STR-TELPOUSER sy-vline 
WA_GOHEAD_STR-POUSERNAME sy-vline 
WA_GOHEAD_STR-BSAKZ sy-vline 
WA_GOHEAD_STR-BUYER sy-vline 
WA_GOHEAD_STR-TELNR1 sy-vline 
WA_GOHEAD_STR-RESWK sy-vline 
WA_GOHEAD_STR-RESWKNAME sy-vline 
WA_GOHEAD_STR-USERNAME sy-vline 
WA_GOHEAD_STR-TELNR2 sy-vline 
WA_GOHEAD_STR-CPUDT sy-vline 
WA_GOHEAD_STR-CPUTM sy-vline 
WA_GOHEAD_STR-TZONE sy-vline 
WA_GOHEAD_STR-AEDAT sy-vline 
WA_GOHEAD_STR-USNAM sy-vline 
WA_GOHEAD_STR-CREATEDBY sy-vline 
WA_GOHEAD_STR-TELUSNAM sy-vline 
WA_GOHEAD_STR-TCODE2 sy-vline 
WA_GOHEAD_STR-TTEXT sy-vline 
WA_GOHEAD_STR-LFSNR sy-vline 
WA_GOHEAD_STR-XNAPR sy-vline 
WA_GOHEAD_STR-WEVER sy-vline 
WA_GOHEAD_STR-AWSYS sy-vline 
WA_GOHEAD_STR-LOGLEVEL sy-vline 
WA_GOHEAD_STR-LAND1 sy-vline 
WA_GOHEAD_STR-CREATE_DELIVERY sy-vline 
WA_GOHEAD_STR-MTSNR sy-vline 
WA_GOHEAD_STR-XBLNR_MANUAL sy-vline 
WA_GOHEAD_STR-FRBNR_MANUAL sy-vline 
WA_GOHEAD_STR-GTS_CUSREF_NO sy-vline 
WA_GOHEAD_STR-MUEBS sy-vline      INTO ld_text SEPARATED BY SPACE.

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