ABAP Select data from SAP table APOCORR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM APOCORR
*  INTO TABLE @DATA(IT_APOCORR2).
*--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_APOCORR INDEX 1 INTO DATA(WA_APOCORR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<APOCORR>-MATNR = 1.
<APOCORR>-EXTLOCNO = 1.
<APOCORR>-LOCTYPE = 1.
<APOCORR>-SOBKZ = 1.
<APOCORR>-SSKEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_APOCORR-ATPCAT, sy-vline,
  WA_APOCORR-SUBLOC, sy-vline,
  WA_APOCORR-VERSION, sy-vline,
  WA_APOCORR-DELNR, sy-vline,
  WA_APOCORR-DELPS, sy-vline,
  WA_APOCORR-POSGUID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_APOCORR 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_APOCORR 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_APOCORR INTO WA_APOCORR.


*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_APOCORR_STR, 
MATNR TYPE STRING,
EXTLOCNO TYPE STRING,
LOCTYPE TYPE STRING,
SOBKZ TYPE STRING,
SSKEY TYPE STRING,
ATPCAT TYPE STRING,
SUBLOC TYPE STRING,
VERSION TYPE STRING,
DELNR TYPE STRING,
DELPS TYPE STRING,
POSGUID TYPE STRING,
DELET TYPE STRING,
DELTAIND TYPE STRING,
CNFTMS TYPE STRING,
REQQTY TYPE STRING,
CNFQTY TYPE STRING,
REQPRF TYPE STRING,
SCHIND TYPE STRING,
TIMETYPE TYPE STRING,
TYPE TYPE STRING,
ORDERCAT TYPE STRING,
PERSID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_APOCORR_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_APOCORR_STR-MATNR sy-vline 
WA_APOCORR_STR-EXTLOCNO sy-vline 
WA_APOCORR_STR-LOCTYPE sy-vline 
WA_APOCORR_STR-SOBKZ sy-vline 
WA_APOCORR_STR-SSKEY sy-vline 
WA_APOCORR_STR-ATPCAT sy-vline 
WA_APOCORR_STR-SUBLOC sy-vline 
WA_APOCORR_STR-VERSION sy-vline 
WA_APOCORR_STR-DELNR sy-vline 
WA_APOCORR_STR-DELPS sy-vline 
WA_APOCORR_STR-POSGUID sy-vline 
WA_APOCORR_STR-DELET sy-vline 
WA_APOCORR_STR-DELTAIND sy-vline 
WA_APOCORR_STR-CNFTMS sy-vline 
WA_APOCORR_STR-REQQTY sy-vline 
WA_APOCORR_STR-CNFQTY sy-vline 
WA_APOCORR_STR-REQPRF sy-vline 
WA_APOCORR_STR-SCHIND sy-vline 
WA_APOCORR_STR-TIMETYPE sy-vline 
WA_APOCORR_STR-TYPE sy-vline 
WA_APOCORR_STR-ORDERCAT sy-vline 
WA_APOCORR_STR-PERSID sy-vline      INTO ld_text SEPARATED BY SPACE.

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