ABAP Select data from SAP table BAPI_FMCA_EXTDOC_H into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPI_FMCA_EXTDOC_H
*  INTO TABLE @DATA(IT_BAPI_FMCA_EXTDOC_H2).
*--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_BAPI_FMCA_EXTDOC_H INDEX 1 INTO DATA(WA_BAPI_FMCA_EXTDOC_H2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPI_FMCA_EXTDOC_H>-REFDOCNO = 1.
<BAPI_FMCA_EXTDOC_H>-LOG_SYSTEM = 1.
<BAPI_FMCA_EXTDOC_H>-APPL_AREA = 1.
<BAPI_FMCA_EXTDOC_H>-SRCPROCESS = 1.
<BAPI_FMCA_EXTDOC_H>-DOCTYPE_BILL_EXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPI_FMCA_EXTDOC_H-DOC_TYPE, sy-vline,
  WA_BAPI_FMCA_EXTDOC_H-CONT_ACCT_ID, sy-vline,
  WA_BAPI_FMCA_EXTDOC_H-CONT_ACCT, sy-vline,
  WA_BAPI_FMCA_EXTDOC_H-BUSPARTNER, sy-vline,
  WA_BAPI_FMCA_EXTDOC_H-DATE_FROM, sy-vline,
  WA_BAPI_FMCA_EXTDOC_H-DATE_TO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPI_FMCA_EXTDOC_H 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_BAPI_FMCA_EXTDOC_H 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_BAPI_FMCA_EXTDOC_H INTO WA_BAPI_FMCA_EXTDOC_H.


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

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

*Conversion exit ALPHA, internal->external for field BUSPARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_FMCA_EXTDOC_H-BUSPARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_FMCA_EXTDOC_H-BUSPARTNER.
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_BAPI_FMCA_EXTDOC_H_STR, 
REFDOCNO TYPE STRING,
LOG_SYSTEM TYPE STRING,
APPL_AREA TYPE STRING,
SRCPROCESS TYPE STRING,
DOCTYPE_BILL_EXT TYPE STRING,
DOC_TYPE TYPE STRING,
CONT_ACCT_ID TYPE STRING,
CONT_ACCT TYPE STRING,
BUSPARTNER TYPE STRING,
DATE_FROM TYPE STRING,
DATE_TO TYPE STRING,
SIMULATED TYPE STRING,
CURRENCY TYPE STRING,
ISO_CODE TYPE STRING,
INV_CURR TYPE STRING,
INV_CURR_ISO_CODE TYPE STRING,
TAX_DET_TYPE TYPE STRING,
TAX_DATE_TYPE TYPE STRING,
SEPARATE_INV TYPE STRING,
INVOICE_FIRST TYPE STRING,
ADD_GROUP TYPE STRING,
PERIOD_KEY TYPE STRING,
REVENUE_TYPE TYPE STRING,
DOC_GUID TYPE STRING,
DOC_OBJTYPE TYPE STRING,
DOC_ID TYPE STRING,
COMP_CODE TYPE STRING,
PROGRAM_EXTID TYPE STRING,
PROGRAM_TYPE TYPE STRING,
PROGRAM_PROFILE TYPE STRING,
SERVICE_ORG TYPE STRING,
SERVICE_ORG_RESP TYPE STRING,
SALES_ORG TYPE STRING,
SALES_ORG_RESP TYPE STRING,
DISTR_CHAN TYPE STRING,
DIVISION TYPE STRING,
REL_DOC_GUID TYPE STRING,
REL_DOC_ID TYPE STRING,
REL_APPL_GUID TYPE STRING,
REL_APPL_ID TYPE STRING,
INV_CATEGORY TYPE STRING,
SRCDOCTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPI_FMCA_EXTDOC_H_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_BAPI_FMCA_EXTDOC_H_STR-REFDOCNO sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-LOG_SYSTEM sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-APPL_AREA sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-SRCPROCESS sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-DOCTYPE_BILL_EXT sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-DOC_TYPE sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-CONT_ACCT_ID sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-CONT_ACCT sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-BUSPARTNER sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-DATE_FROM sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-DATE_TO sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-SIMULATED sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-CURRENCY sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-ISO_CODE sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-INV_CURR sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-INV_CURR_ISO_CODE sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-TAX_DET_TYPE sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-TAX_DATE_TYPE sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-SEPARATE_INV sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-INVOICE_FIRST sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-ADD_GROUP sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-PERIOD_KEY sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-REVENUE_TYPE sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-DOC_GUID sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-DOC_OBJTYPE sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-DOC_ID sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-COMP_CODE sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-PROGRAM_EXTID sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-PROGRAM_TYPE sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-PROGRAM_PROFILE sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-SERVICE_ORG sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-SERVICE_ORG_RESP sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-SALES_ORG sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-SALES_ORG_RESP sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-DISTR_CHAN sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-DIVISION sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-REL_DOC_GUID sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-REL_DOC_ID sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-REL_APPL_GUID sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-REL_APPL_ID sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-INV_CATEGORY sy-vline 
WA_BAPI_FMCA_EXTDOC_H_STR-SRCDOCTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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