ABAP Select data from SAP table RNWCH_EDI_INVPOS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNWCH_EDI_INVPOS
*  INTO TABLE @DATA(IT_RNWCH_EDI_INVPOS2).
*--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_RNWCH_EDI_INVPOS INDEX 1 INTO DATA(WA_RNWCH_EDI_INVPOS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNWCH_EDI_INVPOS>-INVOICE_NR = 1.
<RNWCH_EDI_INVPOS>-POSNR = 1.
<RNWCH_EDI_INVPOS>-LNRLS = 1.
<RNWCH_EDI_INVPOS>-SORT_GROUP = 1.
<RNWCH_EDI_INVPOS>-SORT_NR_1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNWCH_EDI_INVPOS-SORT_NR_2, sy-vline,
  WA_RNWCH_EDI_INVPOS-SORT_OBJCT, sy-vline,
  WA_RNWCH_EDI_INVPOS-SORT_LABTYP, sy-vline,
  WA_RNWCH_EDI_INVPOS-SORT_ORDNR, sy-vline,
  WA_RNWCH_EDI_INVPOS-SORT_SESSION_NR, sy-vline,
  WA_RNWCH_EDI_INVPOS-SRVTYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNWCH_EDI_INVPOS 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_RNWCH_EDI_INVPOS 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_RNWCH_EDI_INVPOS INTO WA_RNWCH_EDI_INVPOS.


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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field SESSION_NR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNWCH_EDI_INVPOS-SESSION_NR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNWCH_EDI_INVPOS-SESSION_NR.
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_RNWCH_EDI_INVPOS_STR, 
INVOICE_NR TYPE STRING,
POSNR TYPE STRING,
LNRLS TYPE STRING,
SORT_GROUP TYPE STRING,
SORT_NR_1 TYPE STRING,
SORT_NR_2 TYPE STRING,
SORT_OBJCT TYPE STRING,
SORT_LABTYP TYPE STRING,
SORT_ORDNR TYPE STRING,
SORT_SESSION_NR TYPE STRING,
SRVTYP TYPE STRING,
TARTYP TYPE STRING,
TARTYPI TYPE STRING,
SERVICE TYPE STRING,
SERVICE_C TYPE STRING,
PART_OF_SELFPAYER_INVOICE TYPE STRING,
REFERRING_SERVICE TYPE STRING,
REFERRING_SERVICE_C TYPE STRING,
REFERRING_SERVICE_LNRLS TYPE STRING,
BEGIN_DATE TYPE STRING,
BEGIN_TIME TYPE STRING,
BEGIN_DATETIME TYPE STRING,
END_DATE TYPE STRING,
END_TIME TYPE STRING,
END_DATETIME TYPE STRING,
SESSION_NR TYPE STRING,
LOCATION TYPE STRING,
LOCATION_P TYPE STRING,
QUANTITY TYPE STRING,
TP_MED TYPE STRING,
TP_VAL_MED TYPE STRING,
TP_FACT_MED TYPE STRING,
TP_EXT_FACT_MED TYPE STRING,
AMOUNT_MED TYPE STRING,
TP_TECH TYPE STRING,
TP_VAL_TECH TYPE STRING,
TP_FACT_TECH TYPE STRING,
TP_EXT_FACT_TECH TYPE STRING,
AMOUNT_TECH TYPE STRING,
PROVIDER_CODE TYPE STRING,
PROVIDER_ID TYPE STRING,
RESPONSIBLE_CODE TYPE STRING,
RESPONSIBLE_ID TYPE STRING,
OBLIGATION TYPE STRING,
TAX_CODE TYPE STRING,
TAX_PERCENT TYPE STRING,
SERVICE_AMOUNT TYPE STRING,
SERVICE_TEXT TYPE STRING,
SERVICE_REMARK TYPE STRING,
T_SERVICE_REMARK TYPE STRING,
SERVICE_ATTRIBUTES TYPE STRING,
PARTICIPANTS TYPE STRING,
BILLING_ROLE TYPE STRING,
MEDICAL_ROLE TYPE STRING,
VALIDAT TYPE STRING,
SECTION_CODE TYPE STRING,
COST_FRACT TYPE STRING,
TP_FACT_MED_P TYPE STRING,
TP_FACT_TECH_P TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNWCH_EDI_INVPOS_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_RNWCH_EDI_INVPOS_STR-INVOICE_NR sy-vline 
WA_RNWCH_EDI_INVPOS_STR-POSNR sy-vline 
WA_RNWCH_EDI_INVPOS_STR-LNRLS sy-vline 
WA_RNWCH_EDI_INVPOS_STR-SORT_GROUP sy-vline 
WA_RNWCH_EDI_INVPOS_STR-SORT_NR_1 sy-vline 
WA_RNWCH_EDI_INVPOS_STR-SORT_NR_2 sy-vline 
WA_RNWCH_EDI_INVPOS_STR-SORT_OBJCT sy-vline 
WA_RNWCH_EDI_INVPOS_STR-SORT_LABTYP sy-vline 
WA_RNWCH_EDI_INVPOS_STR-SORT_ORDNR sy-vline 
WA_RNWCH_EDI_INVPOS_STR-SORT_SESSION_NR sy-vline 
WA_RNWCH_EDI_INVPOS_STR-SRVTYP sy-vline 
WA_RNWCH_EDI_INVPOS_STR-TARTYP sy-vline 
WA_RNWCH_EDI_INVPOS_STR-TARTYPI sy-vline 
WA_RNWCH_EDI_INVPOS_STR-SERVICE sy-vline 
WA_RNWCH_EDI_INVPOS_STR-SERVICE_C sy-vline 
WA_RNWCH_EDI_INVPOS_STR-PART_OF_SELFPAYER_INVOICE sy-vline 
WA_RNWCH_EDI_INVPOS_STR-REFERRING_SERVICE sy-vline 
WA_RNWCH_EDI_INVPOS_STR-REFERRING_SERVICE_C sy-vline 
WA_RNWCH_EDI_INVPOS_STR-REFERRING_SERVICE_LNRLS sy-vline 
WA_RNWCH_EDI_INVPOS_STR-BEGIN_DATE sy-vline 
WA_RNWCH_EDI_INVPOS_STR-BEGIN_TIME sy-vline 
WA_RNWCH_EDI_INVPOS_STR-BEGIN_DATETIME sy-vline 
WA_RNWCH_EDI_INVPOS_STR-END_DATE sy-vline 
WA_RNWCH_EDI_INVPOS_STR-END_TIME sy-vline 
WA_RNWCH_EDI_INVPOS_STR-END_DATETIME sy-vline 
WA_RNWCH_EDI_INVPOS_STR-SESSION_NR sy-vline 
WA_RNWCH_EDI_INVPOS_STR-LOCATION sy-vline 
WA_RNWCH_EDI_INVPOS_STR-LOCATION_P sy-vline 
WA_RNWCH_EDI_INVPOS_STR-QUANTITY sy-vline 
WA_RNWCH_EDI_INVPOS_STR-TP_MED sy-vline 
WA_RNWCH_EDI_INVPOS_STR-TP_VAL_MED sy-vline 
WA_RNWCH_EDI_INVPOS_STR-TP_FACT_MED sy-vline 
WA_RNWCH_EDI_INVPOS_STR-TP_EXT_FACT_MED sy-vline 
WA_RNWCH_EDI_INVPOS_STR-AMOUNT_MED sy-vline 
WA_RNWCH_EDI_INVPOS_STR-TP_TECH sy-vline 
WA_RNWCH_EDI_INVPOS_STR-TP_VAL_TECH sy-vline 
WA_RNWCH_EDI_INVPOS_STR-TP_FACT_TECH sy-vline 
WA_RNWCH_EDI_INVPOS_STR-TP_EXT_FACT_TECH sy-vline 
WA_RNWCH_EDI_INVPOS_STR-AMOUNT_TECH sy-vline 
WA_RNWCH_EDI_INVPOS_STR-PROVIDER_CODE sy-vline 
WA_RNWCH_EDI_INVPOS_STR-PROVIDER_ID sy-vline 
WA_RNWCH_EDI_INVPOS_STR-RESPONSIBLE_CODE sy-vline 
WA_RNWCH_EDI_INVPOS_STR-RESPONSIBLE_ID sy-vline 
WA_RNWCH_EDI_INVPOS_STR-OBLIGATION sy-vline 
WA_RNWCH_EDI_INVPOS_STR-TAX_CODE sy-vline 
WA_RNWCH_EDI_INVPOS_STR-TAX_PERCENT sy-vline 
WA_RNWCH_EDI_INVPOS_STR-SERVICE_AMOUNT sy-vline 
WA_RNWCH_EDI_INVPOS_STR-SERVICE_TEXT sy-vline 
WA_RNWCH_EDI_INVPOS_STR-SERVICE_REMARK sy-vline 
WA_RNWCH_EDI_INVPOS_STR-T_SERVICE_REMARK sy-vline 
WA_RNWCH_EDI_INVPOS_STR-SERVICE_ATTRIBUTES sy-vline 
WA_RNWCH_EDI_INVPOS_STR-PARTICIPANTS sy-vline 
WA_RNWCH_EDI_INVPOS_STR-BILLING_ROLE sy-vline 
WA_RNWCH_EDI_INVPOS_STR-MEDICAL_ROLE sy-vline 
WA_RNWCH_EDI_INVPOS_STR-VALIDAT sy-vline 
WA_RNWCH_EDI_INVPOS_STR-SECTION_CODE sy-vline 
WA_RNWCH_EDI_INVPOS_STR-COST_FRACT sy-vline 
WA_RNWCH_EDI_INVPOS_STR-TP_FACT_MED_P sy-vline 
WA_RNWCH_EDI_INVPOS_STR-TP_FACT_TECH_P sy-vline      INTO ld_text SEPARATED BY SPACE.

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