ABAP Select data from SAP table AENR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AENR
*  INTO TABLE @DATA(IT_AENR2).
*--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_AENR INDEX 1 INTO DATA(WA_AENR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AENR>-MANDT = 1.
<AENR>-AENNR = 1.
<AENR>-AENST = 1.
<AENR>-AENBE = 1.
<AENR>-DATUV = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AENR-TECHV, sy-vline,
  WA_AENR-ANDAT, sy-vline,
  WA_AENR-ANNAM, sy-vline,
  WA_AENR-AEDAT, sy-vline,
  WA_AENR-AENAM, sy-vline,
  WA_AENR-AETXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AENR 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_AENR 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_AENR INTO WA_AENR.


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

*Conversion exit ISOLA, internal->external for field LTXSP
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_AENR-LTXSP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AENR-LTXSP.
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_AENR_STR, 
MANDT TYPE STRING,
AENNR TYPE STRING,
AENST TYPE STRING,
AENBE TYPE STRING,
DATUV TYPE STRING,
TECHV TYPE STRING,
ANDAT TYPE STRING,
ANNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
AETXT TYPE STRING,
LTXSP TYPE STRING,
AEGRU TYPE STRING,
CCART TYPE STRING,
CCSTM TYPE STRING,
DYDAT TYPE STRING,
CONT1 TYPE STRING,
AEFUN TYPE STRING,
UESTR TYPE STRING,
RLKEY TYPE STRING,
LVORM TYPE STRING,
CLINT TYPE STRING,
AERNG TYPE STRING,
RLDAT TYPE STRING,
RLTIM TYPE STRING,
TEREL TYPE STRING,
NACHT TYPE STRING,
INDAT TYPE STRING,
AUDAT TYPE STRING,
FLUSE TYPE STRING,
AEDIF TYPE STRING,
ERLED TYPE STRING,
LASTCHANGEDDATETIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AENR_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_AENR_STR-MANDT sy-vline 
WA_AENR_STR-AENNR sy-vline 
WA_AENR_STR-AENST sy-vline 
WA_AENR_STR-AENBE sy-vline 
WA_AENR_STR-DATUV sy-vline 
WA_AENR_STR-TECHV sy-vline 
WA_AENR_STR-ANDAT sy-vline 
WA_AENR_STR-ANNAM sy-vline 
WA_AENR_STR-AEDAT sy-vline 
WA_AENR_STR-AENAM sy-vline 
WA_AENR_STR-AETXT sy-vline 
WA_AENR_STR-LTXSP sy-vline 
WA_AENR_STR-AEGRU sy-vline 
WA_AENR_STR-CCART sy-vline 
WA_AENR_STR-CCSTM sy-vline 
WA_AENR_STR-DYDAT sy-vline 
WA_AENR_STR-CONT1 sy-vline 
WA_AENR_STR-AEFUN sy-vline 
WA_AENR_STR-UESTR sy-vline 
WA_AENR_STR-RLKEY sy-vline 
WA_AENR_STR-LVORM sy-vline 
WA_AENR_STR-CLINT sy-vline 
WA_AENR_STR-AERNG sy-vline 
WA_AENR_STR-RLDAT sy-vline 
WA_AENR_STR-RLTIM sy-vline 
WA_AENR_STR-TEREL sy-vline 
WA_AENR_STR-NACHT sy-vline 
WA_AENR_STR-INDAT sy-vline 
WA_AENR_STR-AUDAT sy-vline 
WA_AENR_STR-FLUSE sy-vline 
WA_AENR_STR-AEDIF sy-vline 
WA_AENR_STR-ERLED sy-vline 
WA_AENR_STR-LASTCHANGEDDATETIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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