ABAP Select data from SAP table R2BANC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP R2BANC 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 R2BANC. 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 R2BANC 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_R2BANC TYPE STANDARD TABLE OF R2BANC,
      WA_R2BANC TYPE R2BANC,
      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: <R2BANC> TYPE R2BANC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_R2BANC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM R2BANC
  INTO TABLE IT_R2BANC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM R2BANC
*  INTO TABLE @DATA(IT_R2BANC2).
*--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_R2BANC INDEX 1 INTO DATA(WA_R2BANC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_R2BANC ASSIGNING <R2BANC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<R2BANC>-MANDA = 1.
<R2BANC>-MAFID = 1.
<R2BANC>-BUKRS = 1.
<R2BANC>-WERKS = 1.
<R2BANC>-MATNR = 1.

ENDLOOP.

LOOP AT IT_R2BANC INTO WA_R2BANC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_R2BANC-BANFN, sy-vline,
  WA_R2BANC-BNFPO, sy-vline,
  WA_R2BANC-KNTPO, sy-vline,
  WA_R2BANC-LOEKZ, sy-vline,
  WA_R2BANC-EBAKZ, sy-vline,
  WA_R2BANC-AEDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_R2BANC 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_R2BANC 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_R2BANC INTO WA_R2BANC.


*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_R2BANC_STR, 
MANDA TYPE STRING,
MAFID TYPE STRING,
BUKRS TYPE STRING,
WERKS TYPE STRING,
MATNR TYPE STRING,
BANFN TYPE STRING,
BNFPO TYPE STRING,
KNTPO TYPE STRING,
LOEKZ TYPE STRING,
EBAKZ TYPE STRING,
AEDAT TYPE STRING,
MENGE TYPE STRING,
VPROZ TYPE STRING,
BAWRT TYPE STRING,
SAKTO TYPE STRING,
GSBER TYPE STRING,
KOSTL TYPE STRING,
PROJN TYPE STRING,
KDANR TYPE STRING,
KDHPS TYPE STRING,
KDUPS TYPE STRING,
ANLN0 TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
AUFNR TYPE STRING,
AUFPS TYPE STRING,
WEMPF TYPE STRING,
ABLAD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_R2BANC_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_R2BANC_STR-MANDA sy-vline 
WA_R2BANC_STR-MAFID sy-vline 
WA_R2BANC_STR-BUKRS sy-vline 
WA_R2BANC_STR-WERKS sy-vline 
WA_R2BANC_STR-MATNR sy-vline 
WA_R2BANC_STR-BANFN sy-vline 
WA_R2BANC_STR-BNFPO sy-vline 
WA_R2BANC_STR-KNTPO sy-vline 
WA_R2BANC_STR-LOEKZ sy-vline 
WA_R2BANC_STR-EBAKZ sy-vline 
WA_R2BANC_STR-AEDAT sy-vline 
WA_R2BANC_STR-MENGE sy-vline 
WA_R2BANC_STR-VPROZ sy-vline 
WA_R2BANC_STR-BAWRT sy-vline 
WA_R2BANC_STR-SAKTO sy-vline 
WA_R2BANC_STR-GSBER sy-vline 
WA_R2BANC_STR-KOSTL sy-vline 
WA_R2BANC_STR-PROJN sy-vline 
WA_R2BANC_STR-KDANR sy-vline 
WA_R2BANC_STR-KDHPS sy-vline 
WA_R2BANC_STR-KDUPS sy-vline 
WA_R2BANC_STR-ANLN0 sy-vline 
WA_R2BANC_STR-ANLN1 sy-vline 
WA_R2BANC_STR-ANLN2 sy-vline 
WA_R2BANC_STR-AUFNR sy-vline 
WA_R2BANC_STR-AUFPS sy-vline 
WA_R2BANC_STR-WEMPF sy-vline 
WA_R2BANC_STR-ABLAD sy-vline      INTO ld_text SEPARATED BY SPACE.

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