ABAP Select data from SAP table IAPCHECKBOOK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IAPCHECKBOOK
*  INTO TABLE @DATA(IT_IAPCHECKBOOK2).
*--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_IAPCHECKBOOK INDEX 1 INTO DATA(WA_IAPCHECKBOOK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IAPCHECKBOOK>-MANDT = 1.
<IAPCHECKBOOK>-PAYMENTCOMPANYCODE = 1.
<IAPCHECKBOOK>-HOUSEBANK = 1.
<IAPCHECKBOOK>-HOUSEBANKACCOUNT = 1.
<IAPCHECKBOOK>-CHEQUEBOOK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IAPCHECKBOOK-CHEQUEBOOKFIRSTCHEQUE, sy-vline,
  WA_IAPCHECKBOOK-CHEQUEBOOKLASTCHEQUE, sy-vline,
  WA_IAPCHECKBOOK-NEXTCHEQUEBOOK, sy-vline,
  WA_IAPCHECKBOOK-LASTASSIGNEDCHEQUE, sy-vline,
  WA_IAPCHECKBOOK-CHEQUEBOOKNAME, sy-vline,
  WA_IAPCHECKBOOK-CHEQUEBOOKISNONSEQUENTIAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IAPCHECKBOOK 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_IAPCHECKBOOK 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_IAPCHECKBOOK INTO WA_IAPCHECKBOOK.


*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_IAPCHECKBOOK_STR, 
MANDT TYPE STRING,
PAYMENTCOMPANYCODE TYPE STRING,
HOUSEBANK TYPE STRING,
HOUSEBANKACCOUNT TYPE STRING,
CHEQUEBOOK TYPE STRING,
CHEQUEBOOKFIRSTCHEQUE TYPE STRING,
CHEQUEBOOKLASTCHEQUE TYPE STRING,
NEXTCHEQUEBOOK TYPE STRING,
LASTASSIGNEDCHEQUE TYPE STRING,
CHEQUEBOOKNAME TYPE STRING,
CHEQUEBOOKISNONSEQUENTIAL TYPE STRING,
CHEQUEBOOKPURCHASEDATE TYPE STRING,
CHEQUEBOOKPAYMENTMETHODLIST TYPE STRING,
CHEQUEBOOKMINIMALCHEQUECOUNT TYPE STRING,
CHEQUEBOOKPURCHASER TYPE STRING,
CHEQUEBOOKCREATEDBYUSER TYPE STRING,
CHEQUEBOOKCREATIONDATE TYPE STRING,
CHEQUEBOOKCREATIONTIME TYPE STRING,
CHEQUETYPE TYPE STRING,
CHEQUEBOOKSTATUS TYPE STRING,
BANKACCOUNTNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IAPCHECKBOOK_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_IAPCHECKBOOK_STR-MANDT sy-vline 
WA_IAPCHECKBOOK_STR-PAYMENTCOMPANYCODE sy-vline 
WA_IAPCHECKBOOK_STR-HOUSEBANK sy-vline 
WA_IAPCHECKBOOK_STR-HOUSEBANKACCOUNT sy-vline 
WA_IAPCHECKBOOK_STR-CHEQUEBOOK sy-vline 
WA_IAPCHECKBOOK_STR-CHEQUEBOOKFIRSTCHEQUE sy-vline 
WA_IAPCHECKBOOK_STR-CHEQUEBOOKLASTCHEQUE sy-vline 
WA_IAPCHECKBOOK_STR-NEXTCHEQUEBOOK sy-vline 
WA_IAPCHECKBOOK_STR-LASTASSIGNEDCHEQUE sy-vline 
WA_IAPCHECKBOOK_STR-CHEQUEBOOKNAME sy-vline 
WA_IAPCHECKBOOK_STR-CHEQUEBOOKISNONSEQUENTIAL sy-vline 
WA_IAPCHECKBOOK_STR-CHEQUEBOOKPURCHASEDATE sy-vline 
WA_IAPCHECKBOOK_STR-CHEQUEBOOKPAYMENTMETHODLIST sy-vline 
WA_IAPCHECKBOOK_STR-CHEQUEBOOKMINIMALCHEQUECOUNT sy-vline 
WA_IAPCHECKBOOK_STR-CHEQUEBOOKPURCHASER sy-vline 
WA_IAPCHECKBOOK_STR-CHEQUEBOOKCREATEDBYUSER sy-vline 
WA_IAPCHECKBOOK_STR-CHEQUEBOOKCREATIONDATE sy-vline 
WA_IAPCHECKBOOK_STR-CHEQUEBOOKCREATIONTIME sy-vline 
WA_IAPCHECKBOOK_STR-CHEQUETYPE sy-vline 
WA_IAPCHECKBOOK_STR-CHEQUEBOOKSTATUS sy-vline 
WA_IAPCHECKBOOK_STR-BANKACCOUNTNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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