ABAP Select data from SAP table JVCNT_EDI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM JVCNT_EDI
*  INTO TABLE @DATA(IT_JVCNT_EDI2).
*--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_JVCNT_EDI INDEX 1 INTO DATA(WA_JVCNT_EDI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<JVCNT_EDI>-CONQUAL1 = 1.
<JVCNT_EDI>-CONVALU1 = 1.
<JVCNT_EDI>-MESUQUA1 = 1.
<JVCNT_EDI>-CONQUAL2 = 1.
<JVCNT_EDI>-CONVALU2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_JVCNT_EDI-MESUQUA2, sy-vline,
  WA_JVCNT_EDI-CONQUAL3, sy-vline,
  WA_JVCNT_EDI-CONVALU3, sy-vline,
  WA_JVCNT_EDI-MESUQUA3, sy-vline,
  WA_JVCNT_EDI-CONQUAL4, sy-vline,
  WA_JVCNT_EDI-CONVALU4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_JVCNT_EDI 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_JVCNT_EDI 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_JVCNT_EDI INTO WA_JVCNT_EDI.


*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_JVCNT_EDI_STR, 
CONQUAL1 TYPE STRING,
CONVALU1 TYPE STRING,
MESUQUA1 TYPE STRING,
CONQUAL2 TYPE STRING,
CONVALU2 TYPE STRING,
MESUQUA2 TYPE STRING,
CONQUAL3 TYPE STRING,
CONVALU3 TYPE STRING,
MESUQUA3 TYPE STRING,
CONQUAL4 TYPE STRING,
CONVALU4 TYPE STRING,
MESUQUA4 TYPE STRING,
CONQUAL5 TYPE STRING,
CONVALU5 TYPE STRING,
MESUQUA5 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_JVCNT_EDI_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_JVCNT_EDI_STR-CONQUAL1 sy-vline 
WA_JVCNT_EDI_STR-CONVALU1 sy-vline 
WA_JVCNT_EDI_STR-MESUQUA1 sy-vline 
WA_JVCNT_EDI_STR-CONQUAL2 sy-vline 
WA_JVCNT_EDI_STR-CONVALU2 sy-vline 
WA_JVCNT_EDI_STR-MESUQUA2 sy-vline 
WA_JVCNT_EDI_STR-CONQUAL3 sy-vline 
WA_JVCNT_EDI_STR-CONVALU3 sy-vline 
WA_JVCNT_EDI_STR-MESUQUA3 sy-vline 
WA_JVCNT_EDI_STR-CONQUAL4 sy-vline 
WA_JVCNT_EDI_STR-CONVALU4 sy-vline 
WA_JVCNT_EDI_STR-MESUQUA4 sy-vline 
WA_JVCNT_EDI_STR-CONQUAL5 sy-vline 
WA_JVCNT_EDI_STR-CONVALU5 sy-vline 
WA_JVCNT_EDI_STR-MESUQUA5 sy-vline      INTO ld_text SEPARATED BY SPACE.

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