ABAP Select data from SAP table DPAYC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DPAYC
*  INTO TABLE @DATA(IT_DPAYC2).
*--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_DPAYC INDEX 1 INTO DATA(WA_DPAYC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DPAYC>-MANDT = 1.
<DPAYC>-LAUFD = 1.
<DPAYC>-LAUFI = 1.
<DPAYC>-ORIGN = 1.
<DPAYC>-XMUST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DPAYC-XSIMU, sy-vline,
  WA_DPAYC-XVORE, sy-vline,
  WA_DPAYC-XVORB, sy-vline,
  WA_DPAYC-XECHT, sy-vline,
  WA_DPAYC-XDELE, sy-vline,
  WA_DPAYC-BEGRU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DPAYC 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_DPAYC 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_DPAYC INTO WA_DPAYC.


*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_DPAYC_STR, 
MANDT TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
ORIGN TYPE STRING,
XMUST TYPE STRING,
XSIMU TYPE STRING,
XVORE TYPE STRING,
XVORB TYPE STRING,
XECHT TYPE STRING,
XDELE TYPE STRING,
BEGRU TYPE STRING,
XSPAY TYPE STRING,
XMASS TYPE STRING,
AKTYP TYPE STRING,
ERDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DPAYC_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_DPAYC_STR-MANDT sy-vline 
WA_DPAYC_STR-LAUFD sy-vline 
WA_DPAYC_STR-LAUFI sy-vline 
WA_DPAYC_STR-ORIGN sy-vline 
WA_DPAYC_STR-XMUST sy-vline 
WA_DPAYC_STR-XSIMU sy-vline 
WA_DPAYC_STR-XVORE sy-vline 
WA_DPAYC_STR-XVORB sy-vline 
WA_DPAYC_STR-XECHT sy-vline 
WA_DPAYC_STR-XDELE sy-vline 
WA_DPAYC_STR-BEGRU sy-vline 
WA_DPAYC_STR-XSPAY sy-vline 
WA_DPAYC_STR-XMASS sy-vline 
WA_DPAYC_STR-AKTYP sy-vline 
WA_DPAYC_STR-ERDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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