ABAP Select data from SAP table JVA_INT_OPENITEMS_CNET into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM JVA_INT_OPENITEMS_CNET
*  INTO TABLE @DATA(IT_JVA_INT_OPENITEMS_CNET2).
*--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_JVA_INT_OPENITEMS_CNET INDEX 1 INTO DATA(WA_JVA_INT_OPENITEMS_CNET2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<JVA_INT_OPENITEMS_CNET>-BUKRS = 1.
<JVA_INT_OPENITEMS_CNET>-KUNNR = 1.
<JVA_INT_OPENITEMS_CNET>-WAERS = 1.
<JVA_INT_OPENITEMS_CNET>-VNAME = 1.
<JVA_INT_OPENITEMS_CNET>-EGRUP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_JVA_INT_OPENITEMS_CNET-BELNR, sy-vline,
  WA_JVA_INT_OPENITEMS_CNET-YEAR, sy-vline,
  WA_JVA_INT_OPENITEMS_CNET-BUZEI, sy-vline,
  WA_JVA_INT_OPENITEMS_CNET-UMSKZ, sy-vline,
  WA_JVA_INT_OPENITEMS_CNET-BMETHOD, sy-vline,
  WA_JVA_INT_OPENITEMS_CNET-WRBTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_JVA_INT_OPENITEMS_CNET 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_JVA_INT_OPENITEMS_CNET 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_JVA_INT_OPENITEMS_CNET INTO WA_JVA_INT_OPENITEMS_CNET.


*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 KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_JVA_INT_OPENITEMS_CNET-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JVA_INT_OPENITEMS_CNET-KUNNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field BTYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_JVA_INT_OPENITEMS_CNET-BTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JVA_INT_OPENITEMS_CNET-BTYPE.
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_JVA_INT_OPENITEMS_CNET_STR, 
BUKRS TYPE STRING,
KUNNR TYPE STRING,
WAERS TYPE STRING,
VNAME TYPE STRING,
EGRUP TYPE STRING,
BELNR TYPE STRING,
YEAR TYPE STRING,
BUZEI TYPE STRING,
UMSKZ TYPE STRING,
BMETHOD TYPE STRING,
WRBTR TYPE STRING,
DMBTR TYPE STRING,
MONAT TYPE STRING,
BLART TYPE STRING,
BSCHL TYPE STRING,
BI TYPE STRING,
POM_U TYPE STRING,
XREF1 TYPE STRING,
XREF2 TYPE STRING,
BTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_JVA_INT_OPENITEMS_CNET_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_JVA_INT_OPENITEMS_CNET_STR-BUKRS sy-vline 
WA_JVA_INT_OPENITEMS_CNET_STR-KUNNR sy-vline 
WA_JVA_INT_OPENITEMS_CNET_STR-WAERS sy-vline 
WA_JVA_INT_OPENITEMS_CNET_STR-VNAME sy-vline 
WA_JVA_INT_OPENITEMS_CNET_STR-EGRUP sy-vline 
WA_JVA_INT_OPENITEMS_CNET_STR-BELNR sy-vline 
WA_JVA_INT_OPENITEMS_CNET_STR-YEAR sy-vline 
WA_JVA_INT_OPENITEMS_CNET_STR-BUZEI sy-vline 
WA_JVA_INT_OPENITEMS_CNET_STR-UMSKZ sy-vline 
WA_JVA_INT_OPENITEMS_CNET_STR-BMETHOD sy-vline 
WA_JVA_INT_OPENITEMS_CNET_STR-WRBTR sy-vline 
WA_JVA_INT_OPENITEMS_CNET_STR-DMBTR sy-vline 
WA_JVA_INT_OPENITEMS_CNET_STR-MONAT sy-vline 
WA_JVA_INT_OPENITEMS_CNET_STR-BLART sy-vline 
WA_JVA_INT_OPENITEMS_CNET_STR-BSCHL sy-vline 
WA_JVA_INT_OPENITEMS_CNET_STR-BI sy-vline 
WA_JVA_INT_OPENITEMS_CNET_STR-POM_U sy-vline 
WA_JVA_INT_OPENITEMS_CNET_STR-XREF1 sy-vline 
WA_JVA_INT_OPENITEMS_CNET_STR-XREF2 sy-vline 
WA_JVA_INT_OPENITEMS_CNET_STR-BTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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