ABAP Select data from SAP table ACCHD_AMDS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ACCHD_AMDS
*  INTO TABLE @DATA(IT_ACCHD_AMDS2).
*--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_ACCHD_AMDS INDEX 1 INTO DATA(WA_ACCHD_AMDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ACCHD_AMDS>-GLVOR = 1.
<ACCHD_AMDS>-USNAM = 1.
<ACCHD_AMDS>-TCODE = 1.
<ACCHD_AMDS>-CPUDT = 1.
<ACCHD_AMDS>-CPUTM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ACCHD_AMDS-BKTXT, sy-vline,
  WA_ACCHD_AMDS-DOCID, sy-vline,
  WA_ACCHD_AMDS-BARCD, sy-vline,
  WA_ACCHD_AMDS-KNUMV, sy-vline,
  WA_ACCHD_AMDS-BLDAT, sy-vline,
  WA_ACCHD_AMDS-BUDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ACCHD_AMDS 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_ACCHD_AMDS 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_ACCHD_AMDS INTO WA_ACCHD_AMDS.


*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 GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ACCHD_AMDS-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ACCHD_AMDS-GJAHR.
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_ACCHD_AMDS_STR, 
GLVOR TYPE STRING,
USNAM TYPE STRING,
TCODE TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
BKTXT TYPE STRING,
DOCID TYPE STRING,
BARCD TYPE STRING,
KNUMV TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
BLART TYPE STRING,
XBLNR TYPE STRING,
WWERT TYPE STRING,
BUKRS TYPE STRING,
GJAHR TYPE STRING,
MONAT TYPE STRING,
ACC_PRINCIPLE TYPE STRING,
LDGRP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ACCHD_AMDS_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_ACCHD_AMDS_STR-GLVOR sy-vline 
WA_ACCHD_AMDS_STR-USNAM sy-vline 
WA_ACCHD_AMDS_STR-TCODE sy-vline 
WA_ACCHD_AMDS_STR-CPUDT sy-vline 
WA_ACCHD_AMDS_STR-CPUTM sy-vline 
WA_ACCHD_AMDS_STR-BKTXT sy-vline 
WA_ACCHD_AMDS_STR-DOCID sy-vline 
WA_ACCHD_AMDS_STR-BARCD sy-vline 
WA_ACCHD_AMDS_STR-KNUMV sy-vline 
WA_ACCHD_AMDS_STR-BLDAT sy-vline 
WA_ACCHD_AMDS_STR-BUDAT sy-vline 
WA_ACCHD_AMDS_STR-BLART sy-vline 
WA_ACCHD_AMDS_STR-XBLNR sy-vline 
WA_ACCHD_AMDS_STR-WWERT sy-vline 
WA_ACCHD_AMDS_STR-BUKRS sy-vline 
WA_ACCHD_AMDS_STR-GJAHR sy-vline 
WA_ACCHD_AMDS_STR-MONAT sy-vline 
WA_ACCHD_AMDS_STR-ACC_PRINCIPLE sy-vline 
WA_ACCHD_AMDS_STR-LDGRP sy-vline      INTO ld_text SEPARATED BY SPACE.

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