ABAP Select data from SAP table TRANSFER_HEADER_INTERFACE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRANSFER_HEADER_INTERFACE
*  INTO TABLE @DATA(IT_TRANSFER_HEADER_INTERFACE2).
*--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_TRANSFER_HEADER_INTERFACE INDEX 1 INTO DATA(WA_TRANSFER_HEADER_INTERFACE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRANSFER_HEADER_INTERFACE>-CLASS = 1.
<TRANSFER_HEADER_INTERFACE>-PROFIDNETZ = 1.
<TRANSFER_HEADER_INTERFACE>-WORK_AREA = 1.
<TRANSFER_HEADER_INTERFACE>-TSK_INAREA = 1.
<TRANSFER_HEADER_INTERFACE>-MTK_INAREA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRANSFER_HEADER_INTERFACE-SEQ_INAREA, sy-vline,
  WA_TRANSFER_HEADER_INTERFACE-OPR_INAREA, sy-vline,
  WA_TRANSFER_HEADER_INTERFACE-SUO_INAREA, sy-vline,
  WA_TRANSFER_HEADER_INTERFACE-COM_INAREA, sy-vline,
  WA_TRANSFER_HEADER_INTERFACE-PRT_INAREA, sy-vline,
  WA_TRANSFER_HEADER_INTERFACE-MST_INAREA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRANSFER_HEADER_INTERFACE 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_TRANSFER_HEADER_INTERFACE 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_TRANSFER_HEADER_INTERFACE INTO WA_TRANSFER_HEADER_INTERFACE.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_TRANSFER_HEADER_INTERFACE-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRANSFER_HEADER_INTERFACE-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit NUMCV, internal->external for field STLNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_TRANSFER_HEADER_INTERFACE-STLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRANSFER_HEADER_INTERFACE-STLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STLAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TRANSFER_HEADER_INTERFACE-STLAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRANSFER_HEADER_INTERFACE-STLAL.
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_TRANSFER_HEADER_INTERFACE_STR, 
CLASS TYPE STRING,
PROFIDNETZ TYPE STRING,
WORK_AREA TYPE STRING,
TSK_INAREA TYPE STRING,
MTK_INAREA TYPE STRING,
SEQ_INAREA TYPE STRING,
OPR_INAREA TYPE STRING,
SUO_INAREA TYPE STRING,
COM_INAREA TYPE STRING,
PRT_INAREA TYPE STRING,
MST_INAREA TYPE STRING,
CHA_INAREA TYPE STRING,
CHV_INAREA TYPE STRING,
OBM_INAREA TYPE STRING,
BOM_INAREA TYPE STRING,
ITM_INAREA TYPE STRING,
SUI_INAREA TYPE STRING,
CLA_INAREA TYPE STRING,
ODP_INAREA TYPE STRING,
QSS_INAREA TYPE STRING,
AOB_INAREA TYPE STRING,
EQU_INAREA TYPE STRING,
TPL_INAREA TYPE STRING,
BOM_GROUP TYPE STRING,
TSK_GROUP TYPE STRING,
PAC_INAREA TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
STLTY TYPE STRING,
STLNR TYPE STRING,
STLAL TYPE STRING,
STLAN TYPE STRING,
CAPID TYPE STRING,
DATE_FROM TYPE STRING,
DATE_TO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRANSFER_HEADER_INTERFACE_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_TRANSFER_HEADER_INTERFACE_STR-CLASS sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-PROFIDNETZ sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-WORK_AREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-TSK_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-MTK_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-SEQ_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-OPR_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-SUO_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-COM_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-PRT_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-MST_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-CHA_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-CHV_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-OBM_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-BOM_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-ITM_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-SUI_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-CLA_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-ODP_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-QSS_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-AOB_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-EQU_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-TPL_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-BOM_GROUP sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-TSK_GROUP sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-PAC_INAREA sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-MATNR sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-WERKS sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-PLNTY sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-PLNNR sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-PLNAL sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-STLTY sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-STLNR sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-STLAL sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-STLAN sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-CAPID sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-DATE_FROM sy-vline 
WA_TRANSFER_HEADER_INTERFACE_STR-DATE_TO sy-vline      INTO ld_text SEPARATED BY SPACE.

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