ABAP Select data from SAP table AM61P into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP AM61P 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 AM61P. 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 AM61P 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_AM61P TYPE STANDARD TABLE OF AM61P,
      WA_AM61P TYPE AM61P,
      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: <AM61P> TYPE AM61P.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_AM61P.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM AM61P
  INTO TABLE IT_AM61P.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AM61P
*  INTO TABLE @DATA(IT_AM61P2).
*--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_AM61P INDEX 1 INTO DATA(WA_AM61P2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_AM61P ASSIGNING <AM61P>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AM61P>-XCODE = 1.
<AM61P>-FCTYP = 1.
<AM61P>-GKDAY = 1.
<AM61P>-FKDAY = 1.
<AM61P>-FKDIF = 1.

ENDLOOP.

LOOP AT IT_AM61P INTO WA_AM61P.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AM61P-FWEEK, sy-vline,
  WA_AM61P-MNG01, sy-vline,
  WA_AM61P-REF01, sy-vline,
  WA_AM61P-REF02, sy-vline,
  WA_AM61P-FLG01, sy-vline,
  WA_AM61P-ALINE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AM61P 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_AM61P 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_AM61P INTO WA_AM61P.


*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_AM61P_STR, 
XCODE TYPE STRING,
FCTYP TYPE STRING,
GKDAY TYPE STRING,
FKDAY TYPE STRING,
FKDIF TYPE STRING,
FWEEK TYPE STRING,
MNG01 TYPE STRING,
REF01 TYPE STRING,
REF02 TYPE STRING,
FLG01 TYPE STRING,
ALINE TYPE STRING,
MLINE TYPE STRING,
BLINE TYPE STRING,
TBNAM TYPE STRING,
FNAME TYPE STRING,
AEN01 TYPE STRING,
AEN02 TYPE STRING,
AKTAL TYPE STRING,
AKPOS TYPE STRING,
DYNNR TYPE STRING,
INDEX TYPE STRING,
LLINE TYPE STRING,
FLG02 TYPE STRING,
FLG03 TYPE STRING,
FLGS1 TYPE STRING,
FLGS2 TYPE STRING,
FLGS3 TYPE STRING,
BASCH TYPE STRING,
STYPE TYPE STRING,
TRMER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AM61P_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_AM61P_STR-XCODE sy-vline 
WA_AM61P_STR-FCTYP sy-vline 
WA_AM61P_STR-GKDAY sy-vline 
WA_AM61P_STR-FKDAY sy-vline 
WA_AM61P_STR-FKDIF sy-vline 
WA_AM61P_STR-FWEEK sy-vline 
WA_AM61P_STR-MNG01 sy-vline 
WA_AM61P_STR-REF01 sy-vline 
WA_AM61P_STR-REF02 sy-vline 
WA_AM61P_STR-FLG01 sy-vline 
WA_AM61P_STR-ALINE sy-vline 
WA_AM61P_STR-MLINE sy-vline 
WA_AM61P_STR-BLINE sy-vline 
WA_AM61P_STR-TBNAM sy-vline 
WA_AM61P_STR-FNAME sy-vline 
WA_AM61P_STR-AEN01 sy-vline 
WA_AM61P_STR-AEN02 sy-vline 
WA_AM61P_STR-AKTAL sy-vline 
WA_AM61P_STR-AKPOS sy-vline 
WA_AM61P_STR-DYNNR sy-vline 
WA_AM61P_STR-INDEX sy-vline 
WA_AM61P_STR-LLINE sy-vline 
WA_AM61P_STR-FLG02 sy-vline 
WA_AM61P_STR-FLG03 sy-vline 
WA_AM61P_STR-FLGS1 sy-vline 
WA_AM61P_STR-FLGS2 sy-vline 
WA_AM61P_STR-FLGS3 sy-vline 
WA_AM61P_STR-BASCH sy-vline 
WA_AM61P_STR-STYPE sy-vline 
WA_AM61P_STR-TRMER sy-vline      INTO ld_text SEPARATED BY SPACE.

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