ABAP Select data from SAP table ATRANSFRASSGNMT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ATRANSFRASSGNMT
*  INTO TABLE @DATA(IT_ATRANSFRASSGNMT2).
*--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_ATRANSFRASSGNMT INDEX 1 INTO DATA(WA_ATRANSFRASSGNMT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ATRANSFRASSGNMT>-MANDT = 1.
<ATRANSFRASSGNMT>-REQUIREMENTTYPE = 1.
<ATRANSFRASSGNMT>-REQUIREMENTDOCUMENTNUMBER = 1.
<ATRANSFRASSGNMT>-REQUIREMENTDOCUMENTITEM = 1.
<ATRANSFRASSGNMT>-FRMREQUIREMENTTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ATRANSFRASSGNMT-ARUNFRMRQMTDOCNMBR, sy-vline,
  WA_ATRANSFRASSGNMT-ARUNFRMRQMTDOCITEM, sy-vline,
  WA_ATRANSFRASSGNMT-ARUNRULENAME, sy-vline,
  WA_ATRANSFRASSGNMT-ARUNDEMANDSORTRULE, sy-vline,
  WA_ATRANSFRASSGNMT-ARUNDEMANDMODEOFTRANSFER, sy-vline,
  WA_ATRANSFRASSGNMT-PLANT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ATRANSFRASSGNMT 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_ATRANSFRASSGNMT 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_ATRANSFRASSGNMT INTO WA_ATRANSFRASSGNMT.


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

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

*Conversion exit CUNIT, internal->external for field ARUNORDERUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ATRANSFRASSGNMT-ARUNORDERUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ATRANSFRASSGNMT-ARUNORDERUNIT.
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_ATRANSFRASSGNMT_STR, 
MANDT TYPE STRING,
REQUIREMENTTYPE TYPE STRING,
REQUIREMENTDOCUMENTNUMBER TYPE STRING,
REQUIREMENTDOCUMENTITEM TYPE STRING,
FRMREQUIREMENTTYPE TYPE STRING,
ARUNFRMRQMTDOCNMBR TYPE STRING,
ARUNFRMRQMTDOCITEM TYPE STRING,
ARUNRULENAME TYPE STRING,
ARUNDEMANDSORTRULE TYPE STRING,
ARUNDEMANDMODEOFTRANSFER TYPE STRING,
PLANT TYPE STRING,
ARUNSUPPLYMODEOFTRANSFER TYPE STRING,
TOBEASSIGNEDQTYINORDUNIT TYPE STRING,
ARUNORDERUNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ATRANSFRASSGNMT_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_ATRANSFRASSGNMT_STR-MANDT sy-vline 
WA_ATRANSFRASSGNMT_STR-REQUIREMENTTYPE sy-vline 
WA_ATRANSFRASSGNMT_STR-REQUIREMENTDOCUMENTNUMBER sy-vline 
WA_ATRANSFRASSGNMT_STR-REQUIREMENTDOCUMENTITEM sy-vline 
WA_ATRANSFRASSGNMT_STR-FRMREQUIREMENTTYPE sy-vline 
WA_ATRANSFRASSGNMT_STR-ARUNFRMRQMTDOCNMBR sy-vline 
WA_ATRANSFRASSGNMT_STR-ARUNFRMRQMTDOCITEM sy-vline 
WA_ATRANSFRASSGNMT_STR-ARUNRULENAME sy-vline 
WA_ATRANSFRASSGNMT_STR-ARUNDEMANDSORTRULE sy-vline 
WA_ATRANSFRASSGNMT_STR-ARUNDEMANDMODEOFTRANSFER sy-vline 
WA_ATRANSFRASSGNMT_STR-PLANT sy-vline 
WA_ATRANSFRASSGNMT_STR-ARUNSUPPLYMODEOFTRANSFER sy-vline 
WA_ATRANSFRASSGNMT_STR-TOBEASSIGNEDQTYINORDUNIT sy-vline 
WA_ATRANSFRASSGNMT_STR-ARUNORDERUNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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