ABAP Select data from SAP table PAY99_INTERNAL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PAY99_INTERNAL 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 PAY99_INTERNAL. 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 PAY99_INTERNAL 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_PAY99_INTERNAL TYPE STANDARD TABLE OF PAY99_INTERNAL,
      WA_PAY99_INTERNAL TYPE PAY99_INTERNAL,
      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: <PAY99_INTERNAL> TYPE PAY99_INTERNAL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PAY99_INTERNAL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PAY99_INTERNAL
  INTO TABLE IT_PAY99_INTERNAL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PAY99_INTERNAL
*  INTO TABLE @DATA(IT_PAY99_INTERNAL2).
*--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_PAY99_INTERNAL INDEX 1 INTO DATA(WA_PAY99_INTERNAL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PAY99_INTERNAL ASSIGNING <PAY99_INTERNAL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PAY99_INTERNAL>-AIT = 1.
<PAY99_INTERNAL>-ALLAP = 1.
<PAY99_INTERNAL>-AOA = 1.
<PAY99_INTERNAL>-AV0 = 1.
<PAY99_INTERNAL>-APER = 1.

ENDLOOP.

LOOP AT IT_PAY99_INTERNAL INTO WA_PAY99_INTERNAL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PAY99_INTERNAL-ART, sy-vline,
  WA_PAY99_INTERNAL-CABC, sy-vline,
  WA_PAY99_INTERNAL-DATUMSANGABE, sy-vline,
  WA_PAY99_INTERNAL-DT, sy-vline,
  WA_PAY99_INTERNAL-IT, sy-vline,
  WA_PAY99_INTERNAL-LRT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PAY99_INTERNAL 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_PAY99_INTERNAL 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_PAY99_INTERNAL INTO WA_PAY99_INTERNAL.


*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_PAY99_INTERNAL_STR, 
AIT TYPE STRING,
ALLAP TYPE STRING,
AOA TYPE STRING,
AV0 TYPE STRING,
APER TYPE STRING,
ART TYPE STRING,
CABC TYPE STRING,
DATUMSANGABE TYPE STRING,
DT TYPE STRING,
IT TYPE STRING,
LRT TYPE STRING,
MODIF TYPE STRING,
MV TYPE STRING,
NEW_RGDIR TYPE STRING,
ORT TYPE STRING,
PSP TYPE STRING,
PT TYPE STRING,
PURL_ALL TYPE STRING,
RGDIR TYPE STRING,
SUBSTITUTIONS TYPE STRING,
UIT TYPE STRING,
URT TYPE STRING,
VORT TYPE STRING,
VAR TYPE STRING,
ZIT TYPE STRING,
ZL TYPE STRING,
OCRT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PAY99_INTERNAL_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_PAY99_INTERNAL_STR-AIT sy-vline 
WA_PAY99_INTERNAL_STR-ALLAP sy-vline 
WA_PAY99_INTERNAL_STR-AOA sy-vline 
WA_PAY99_INTERNAL_STR-AV0 sy-vline 
WA_PAY99_INTERNAL_STR-APER sy-vline 
WA_PAY99_INTERNAL_STR-ART sy-vline 
WA_PAY99_INTERNAL_STR-CABC sy-vline 
WA_PAY99_INTERNAL_STR-DATUMSANGABE sy-vline 
WA_PAY99_INTERNAL_STR-DT sy-vline 
WA_PAY99_INTERNAL_STR-IT sy-vline 
WA_PAY99_INTERNAL_STR-LRT sy-vline 
WA_PAY99_INTERNAL_STR-MODIF sy-vline 
WA_PAY99_INTERNAL_STR-MV sy-vline 
WA_PAY99_INTERNAL_STR-NEW_RGDIR sy-vline 
WA_PAY99_INTERNAL_STR-ORT sy-vline 
WA_PAY99_INTERNAL_STR-PSP sy-vline 
WA_PAY99_INTERNAL_STR-PT sy-vline 
WA_PAY99_INTERNAL_STR-PURL_ALL sy-vline 
WA_PAY99_INTERNAL_STR-RGDIR sy-vline 
WA_PAY99_INTERNAL_STR-SUBSTITUTIONS sy-vline 
WA_PAY99_INTERNAL_STR-UIT sy-vline 
WA_PAY99_INTERNAL_STR-URT sy-vline 
WA_PAY99_INTERNAL_STR-VORT sy-vline 
WA_PAY99_INTERNAL_STR-VAR sy-vline 
WA_PAY99_INTERNAL_STR-ZIT sy-vline 
WA_PAY99_INTERNAL_STR-ZL sy-vline 
WA_PAY99_INTERNAL_STR-OCRT sy-vline      INTO ld_text SEPARATED BY SPACE.

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