ABAP Select data from SAP table J_1BCTE_REF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_1BCTE_REF 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 J_1BCTE_REF. 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 J_1BCTE_REF 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_J_1BCTE_REF TYPE STANDARD TABLE OF J_1BCTE_REF,
      WA_J_1BCTE_REF TYPE J_1BCTE_REF,
      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: <J_1BCTE_REF> TYPE J_1BCTE_REF.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_1BCTE_REF.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_1BCTE_REF
  INTO TABLE IT_J_1BCTE_REF.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_1BCTE_REF
*  INTO TABLE @DATA(IT_J_1BCTE_REF2).
*--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_J_1BCTE_REF INDEX 1 INTO DATA(WA_J_1BCTE_REF2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_1BCTE_REF ASSIGNING <J_1BCTE_REF>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_1BCTE_REF>-REGIO = 1.
<J_1BCTE_REF>-NFYEAR = 1.
<J_1BCTE_REF>-NFMONTH = 1.
<J_1BCTE_REF>-STCD1 = 1.
<J_1BCTE_REF>-MODEL = 1.

ENDLOOP.

LOOP AT IT_J_1BCTE_REF INTO WA_J_1BCTE_REF.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_1BCTE_REF-SERIE, sy-vline,
  WA_J_1BCTE_REF-NFNUM9, sy-vline,
  WA_J_1BCTE_REF-DOCNUM9, sy-vline,
  WA_J_1BCTE_REF-CDV, sy-vline,
  WA_J_1BCTE_REF-VBELN, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_J_1BCTE_REF 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_J_1BCTE_REF 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_J_1BCTE_REF INTO WA_J_1BCTE_REF.


*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.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1BCTE_REF-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1BCTE_REF-VBELN.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_J_1BCTE_REF_STR, 
REGIO TYPE STRING,
NFYEAR TYPE STRING,
NFMONTH TYPE STRING,
STCD1 TYPE STRING,
MODEL TYPE STRING,
SERIE TYPE STRING,
NFNUM9 TYPE STRING,
DOCNUM9 TYPE STRING,
CDV TYPE STRING,
VBELN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_1BCTE_REF_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_J_1BCTE_REF_STR-REGIO sy-vline 
WA_J_1BCTE_REF_STR-NFYEAR sy-vline 
WA_J_1BCTE_REF_STR-NFMONTH sy-vline 
WA_J_1BCTE_REF_STR-STCD1 sy-vline 
WA_J_1BCTE_REF_STR-MODEL sy-vline 
WA_J_1BCTE_REF_STR-SERIE sy-vline 
WA_J_1BCTE_REF_STR-NFNUM9 sy-vline 
WA_J_1BCTE_REF_STR-DOCNUM9 sy-vline 
WA_J_1BCTE_REF_STR-CDV sy-vline 
WA_J_1BCTE_REF_STR-VBELN sy-vline      INTO ld_text SEPARATED BY SPACE.

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