ABAP Select data from SAP table DPAYCHKNUM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DPAYCHKNUM
*  INTO TABLE @DATA(IT_DPAYCHKNUM2).
*--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_DPAYCHKNUM INDEX 1 INTO DATA(WA_DPAYCHKNUM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DPAYCHKNUM>-MANDT = 1.
<DPAYCHKNUM>-BUKRS = 1.
<DPAYCHKNUM>-HBKID = 1.
<DPAYCHKNUM>-HKTID = 1.
<DPAYCHKNUM>-NPOOL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DPAYCHKNUM-NPOOLTYPE, sy-vline,
  WA_DPAYCHKNUM-POOLORDER, sy-vline,
  WA_DPAYCHKNUM-NPOOLTEXT, sy-vline,
  WA_DPAYCHKNUM-POOLSTART, sy-vline,
  WA_DPAYCHKNUM-POOLENDE, sy-vline,
  WA_DPAYCHKNUM-LAST_NUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DPAYCHKNUM 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_DPAYCHKNUM 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_DPAYCHKNUM INTO WA_DPAYCHKNUM.


*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_DPAYCHKNUM_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
NPOOL TYPE STRING,
NPOOLTYPE TYPE STRING,
POOLORDER TYPE STRING,
NPOOLTEXT TYPE STRING,
POOLSTART TYPE STRING,
POOLENDE TYPE STRING,
LAST_NUMBER TYPE STRING,
CLOSED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DPAYCHKNUM_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_DPAYCHKNUM_STR-MANDT sy-vline 
WA_DPAYCHKNUM_STR-BUKRS sy-vline 
WA_DPAYCHKNUM_STR-HBKID sy-vline 
WA_DPAYCHKNUM_STR-HKTID sy-vline 
WA_DPAYCHKNUM_STR-NPOOL sy-vline 
WA_DPAYCHKNUM_STR-NPOOLTYPE sy-vline 
WA_DPAYCHKNUM_STR-POOLORDER sy-vline 
WA_DPAYCHKNUM_STR-NPOOLTEXT sy-vline 
WA_DPAYCHKNUM_STR-POOLSTART sy-vline 
WA_DPAYCHKNUM_STR-POOLENDE sy-vline 
WA_DPAYCHKNUM_STR-LAST_NUMBER sy-vline 
WA_DPAYCHKNUM_STR-CLOSED sy-vline      INTO ld_text SEPARATED BY SPACE.

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