ABAP Select data from SAP table BAPIWEBINVHEAD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPIWEBINVHEAD
*  INTO TABLE @DATA(IT_BAPIWEBINVHEAD2).
*--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_BAPIWEBINVHEAD INDEX 1 INTO DATA(WA_BAPIWEBINVHEAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPIWEBINVHEAD>-BILLINGDOC = 1.
<BAPIWEBINVHEAD>-BILL_TYPE = 1.
<BAPIWEBINVHEAD>-BILL_TYPE_TEXT = 1.
<BAPIWEBINVHEAD>-BILLCATEG = 1.
<BAPIWEBINVHEAD>-BILLCATEG_TEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPIWEBINVHEAD-SD_DOC_CAT, sy-vline,
  WA_BAPIWEBINVHEAD-SD_DOC_CAT_TEXT, sy-vline,
  WA_BAPIWEBINVHEAD-CURRENCY, sy-vline,
  WA_BAPIWEBINVHEAD-CURRENCY_ISO, sy-vline,
  WA_BAPIWEBINVHEAD-NET_VALUE, sy-vline,
  WA_BAPIWEBINVHEAD-SOLD_TO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPIWEBINVHEAD 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_BAPIWEBINVHEAD 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_BAPIWEBINVHEAD INTO WA_BAPIWEBINVHEAD.


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

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

*Conversion exit ALPHA, internal->external for field PAYER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPIWEBINVHEAD-PAYER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPIWEBINVHEAD-PAYER.
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_BAPIWEBINVHEAD_STR, 
BILLINGDOC TYPE STRING,
BILL_TYPE TYPE STRING,
BILL_TYPE_TEXT TYPE STRING,
BILLCATEG TYPE STRING,
BILLCATEG_TEXT TYPE STRING,
SD_DOC_CAT TYPE STRING,
SD_DOC_CAT_TEXT TYPE STRING,
CURRENCY TYPE STRING,
CURRENCY_ISO TYPE STRING,
NET_VALUE TYPE STRING,
SOLD_TO TYPE STRING,
PAYER TYPE STRING,
TAX_AMOUNT TYPE STRING,
CANCELLED TYPE STRING,
BILL_DATE TYPE STRING,
INCOTERMS1 TYPE STRING,
INCOTERMS1_TEXT TYPE STRING,
INCOTERMS2 TYPE STRING,
PMNTTRMS TYPE STRING,
PMNTTRMS_TEXT TYPE STRING,
COMP_CODE TYPE STRING,
COMP_NAME TYPE STRING,
REFERENCE TYPE STRING,
BLINE_DATE TYPE STRING,
DSCT_DATE1 TYPE STRING,
DSCT_DATE2 TYPE STRING,
NET_DATE TYPE STRING,
DSCT_PCT1 TYPE STRING,
DSCT_PCT2 TYPE STRING,
INCOTERMSV TYPE STRING,
INCOTERMS2L TYPE STRING,
INCOTERMS3L TYPE STRING,
SD_DOC_CAT_LONG TYPE STRING,
INCOTERMSV_TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPIWEBINVHEAD_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_BAPIWEBINVHEAD_STR-BILLINGDOC sy-vline 
WA_BAPIWEBINVHEAD_STR-BILL_TYPE sy-vline 
WA_BAPIWEBINVHEAD_STR-BILL_TYPE_TEXT sy-vline 
WA_BAPIWEBINVHEAD_STR-BILLCATEG sy-vline 
WA_BAPIWEBINVHEAD_STR-BILLCATEG_TEXT sy-vline 
WA_BAPIWEBINVHEAD_STR-SD_DOC_CAT sy-vline 
WA_BAPIWEBINVHEAD_STR-SD_DOC_CAT_TEXT sy-vline 
WA_BAPIWEBINVHEAD_STR-CURRENCY sy-vline 
WA_BAPIWEBINVHEAD_STR-CURRENCY_ISO sy-vline 
WA_BAPIWEBINVHEAD_STR-NET_VALUE sy-vline 
WA_BAPIWEBINVHEAD_STR-SOLD_TO sy-vline 
WA_BAPIWEBINVHEAD_STR-PAYER sy-vline 
WA_BAPIWEBINVHEAD_STR-TAX_AMOUNT sy-vline 
WA_BAPIWEBINVHEAD_STR-CANCELLED sy-vline 
WA_BAPIWEBINVHEAD_STR-BILL_DATE sy-vline 
WA_BAPIWEBINVHEAD_STR-INCOTERMS1 sy-vline 
WA_BAPIWEBINVHEAD_STR-INCOTERMS1_TEXT sy-vline 
WA_BAPIWEBINVHEAD_STR-INCOTERMS2 sy-vline 
WA_BAPIWEBINVHEAD_STR-PMNTTRMS sy-vline 
WA_BAPIWEBINVHEAD_STR-PMNTTRMS_TEXT sy-vline 
WA_BAPIWEBINVHEAD_STR-COMP_CODE sy-vline 
WA_BAPIWEBINVHEAD_STR-COMP_NAME sy-vline 
WA_BAPIWEBINVHEAD_STR-REFERENCE sy-vline 
WA_BAPIWEBINVHEAD_STR-BLINE_DATE sy-vline 
WA_BAPIWEBINVHEAD_STR-DSCT_DATE1 sy-vline 
WA_BAPIWEBINVHEAD_STR-DSCT_DATE2 sy-vline 
WA_BAPIWEBINVHEAD_STR-NET_DATE sy-vline 
WA_BAPIWEBINVHEAD_STR-DSCT_PCT1 sy-vline 
WA_BAPIWEBINVHEAD_STR-DSCT_PCT2 sy-vline 
WA_BAPIWEBINVHEAD_STR-INCOTERMSV sy-vline 
WA_BAPIWEBINVHEAD_STR-INCOTERMS2L sy-vline 
WA_BAPIWEBINVHEAD_STR-INCOTERMS3L sy-vline 
WA_BAPIWEBINVHEAD_STR-SD_DOC_CAT_LONG sy-vline 
WA_BAPIWEBINVHEAD_STR-INCOTERMSV_TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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