ABAP Select data from SAP table APR_MASK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM APR_MASK
*  INTO TABLE @DATA(IT_APR_MASK2).
*--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_APR_MASK INDEX 1 INTO DATA(WA_APR_MASK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<APR_MASK>-SAP_OBJECT = 1.
<APR_MASK>-AR_OBJECT = 1.
<APR_MASK>-ARCHIV_ID = 1.
<APR_MASK>-DOC_TYPE = 1.
<APR_MASK>-RPC_HOST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_APR_MASK-RPC_SERVIC, sy-vline,
  WA_APR_MASK-INTERFACE, sy-vline,
  WA_APR_MASK-MANDANT, sy-vline,
  WA_APR_MASK-REPORT, sy-vline,
  WA_APR_MASK-INFO, sy-vline,
  WA_APR_MASK-ARCTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_APR_MASK 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_APR_MASK 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_APR_MASK INTO WA_APR_MASK.


*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_APR_MASK_STR, 
SAP_OBJECT TYPE STRING,
AR_OBJECT TYPE STRING,
ARCHIV_ID TYPE STRING,
DOC_TYPE TYPE STRING,
RPC_HOST TYPE STRING,
RPC_SERVIC TYPE STRING,
INTERFACE TYPE STRING,
MANDANT TYPE STRING,
REPORT TYPE STRING,
INFO TYPE STRING,
ARCTEXT TYPE STRING,
DATUM TYPE STRING,
ARCUSER TYPE STRING,
PRINTER TYPE STRING,
FORMULAR TYPE STRING,
ARCHIVPATH TYPE STRING,
PROTOKOLL TYPE STRING,
VERSION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_APR_MASK_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_APR_MASK_STR-SAP_OBJECT sy-vline 
WA_APR_MASK_STR-AR_OBJECT sy-vline 
WA_APR_MASK_STR-ARCHIV_ID sy-vline 
WA_APR_MASK_STR-DOC_TYPE sy-vline 
WA_APR_MASK_STR-RPC_HOST sy-vline 
WA_APR_MASK_STR-RPC_SERVIC sy-vline 
WA_APR_MASK_STR-INTERFACE sy-vline 
WA_APR_MASK_STR-MANDANT sy-vline 
WA_APR_MASK_STR-REPORT sy-vline 
WA_APR_MASK_STR-INFO sy-vline 
WA_APR_MASK_STR-ARCTEXT sy-vline 
WA_APR_MASK_STR-DATUM sy-vline 
WA_APR_MASK_STR-ARCUSER sy-vline 
WA_APR_MASK_STR-PRINTER sy-vline 
WA_APR_MASK_STR-FORMULAR sy-vline 
WA_APR_MASK_STR-ARCHIVPATH sy-vline 
WA_APR_MASK_STR-PROTOKOLL sy-vline 
WA_APR_MASK_STR-VERSION sy-vline      INTO ld_text SEPARATED BY SPACE.

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