ABAP Select data from SAP table CHDDEBIT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CHDDEBIT
*  INTO TABLE @DATA(IT_CHDDEBIT2).
*--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_CHDDEBIT INDEX 1 INTO DATA(WA_CHDDEBIT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CHDDEBIT>-FILE_ID = 1.
<CHDDEBIT>-DUE_DATE = 1.
<CHDDEBIT>-DD_CUST = 1.
<CHDDEBIT>-RESERVE1 = 1.
<CHDDEBIT>-RESERVE2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CHDDEBIT-DD_NUMBER, sy-vline,
  WA_CHDDEBIT-TRAN_TYPE, sy-vline,
  WA_CHDDEBIT-TRANS_SEQ_NR, sy-vline,
  WA_CHDDEBIT-RESERVE3, sy-vline,
  WA_CHDDEBIT-ISO, sy-vline,
  WA_CHDDEBIT-AMOUNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CHDDEBIT 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_CHDDEBIT 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_CHDDEBIT INTO WA_CHDDEBIT.


*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_CHDDEBIT_STR, 
FILE_ID TYPE STRING,
DUE_DATE TYPE STRING,
DD_CUST TYPE STRING,
RESERVE1 TYPE STRING,
RESERVE2 TYPE STRING,
DD_NUMBER TYPE STRING,
TRAN_TYPE TYPE STRING,
TRANS_SEQ_NR TYPE STRING,
RESERVE3 TYPE STRING,
ISO TYPE STRING,
AMOUNT TYPE STRING,
RESERVE4 TYPE STRING,
RESERVE5 TYPE STRING,
RESERVE6 TYPE STRING,
ACC_NR TYPE STRING,
RESERVE7 TYPE STRING,
REFNR TYPE STRING,
VALUDATE TYPE STRING,
DDDATE TYPE STRING,
BPNAME TYPE STRING,
BPNAME1 TYPE STRING,
BPNAME2 TYPE STRING,
BPPLZ TYPE STRING,
BPCITY TYPE STRING,
RESERVE8 TYPE STRING,
RESERVE9 TYPE STRING,
RESERVE10 TYPE STRING,
TASKREF TYPE STRING,
NOTE1 TYPE STRING,
NOTE2 TYPE STRING,
NOTE3 TYPE STRING,
NOTE4 TYPE STRING,
RETCODE TYPE STRING,
RESERV TYPE STRING,
OPNAME TYPE STRING,
OPNAME1 TYPE STRING,
OPNAME2 TYPE STRING,
OPPLZ TYPE STRING,
OPCITY TYPE STRING,
CURRCODE TYPE STRING,
PRICE TYPE STRING,
RESERVE11 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CHDDEBIT_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_CHDDEBIT_STR-FILE_ID sy-vline 
WA_CHDDEBIT_STR-DUE_DATE sy-vline 
WA_CHDDEBIT_STR-DD_CUST sy-vline 
WA_CHDDEBIT_STR-RESERVE1 sy-vline 
WA_CHDDEBIT_STR-RESERVE2 sy-vline 
WA_CHDDEBIT_STR-DD_NUMBER sy-vline 
WA_CHDDEBIT_STR-TRAN_TYPE sy-vline 
WA_CHDDEBIT_STR-TRANS_SEQ_NR sy-vline 
WA_CHDDEBIT_STR-RESERVE3 sy-vline 
WA_CHDDEBIT_STR-ISO sy-vline 
WA_CHDDEBIT_STR-AMOUNT sy-vline 
WA_CHDDEBIT_STR-RESERVE4 sy-vline 
WA_CHDDEBIT_STR-RESERVE5 sy-vline 
WA_CHDDEBIT_STR-RESERVE6 sy-vline 
WA_CHDDEBIT_STR-ACC_NR sy-vline 
WA_CHDDEBIT_STR-RESERVE7 sy-vline 
WA_CHDDEBIT_STR-REFNR sy-vline 
WA_CHDDEBIT_STR-VALUDATE sy-vline 
WA_CHDDEBIT_STR-DDDATE sy-vline 
WA_CHDDEBIT_STR-BPNAME sy-vline 
WA_CHDDEBIT_STR-BPNAME1 sy-vline 
WA_CHDDEBIT_STR-BPNAME2 sy-vline 
WA_CHDDEBIT_STR-BPPLZ sy-vline 
WA_CHDDEBIT_STR-BPCITY sy-vline 
WA_CHDDEBIT_STR-RESERVE8 sy-vline 
WA_CHDDEBIT_STR-RESERVE9 sy-vline 
WA_CHDDEBIT_STR-RESERVE10 sy-vline 
WA_CHDDEBIT_STR-TASKREF sy-vline 
WA_CHDDEBIT_STR-NOTE1 sy-vline 
WA_CHDDEBIT_STR-NOTE2 sy-vline 
WA_CHDDEBIT_STR-NOTE3 sy-vline 
WA_CHDDEBIT_STR-NOTE4 sy-vline 
WA_CHDDEBIT_STR-RETCODE sy-vline 
WA_CHDDEBIT_STR-RESERV sy-vline 
WA_CHDDEBIT_STR-OPNAME sy-vline 
WA_CHDDEBIT_STR-OPNAME1 sy-vline 
WA_CHDDEBIT_STR-OPNAME2 sy-vline 
WA_CHDDEBIT_STR-OPPLZ sy-vline 
WA_CHDDEBIT_STR-OPCITY sy-vline 
WA_CHDDEBIT_STR-CURRCODE sy-vline 
WA_CHDDEBIT_STR-PRICE sy-vline 
WA_CHDDEBIT_STR-RESERVE11 sy-vline      INTO ld_text SEPARATED BY SPACE.

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