ABAP Select data from SAP table CVAPI_DOC_FILE2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CVAPI_DOC_FILE2 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 CVAPI_DOC_FILE2. 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 CVAPI_DOC_FILE2 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_CVAPI_DOC_FILE2 TYPE STANDARD TABLE OF CVAPI_DOC_FILE2,
      WA_CVAPI_DOC_FILE2 TYPE CVAPI_DOC_FILE2,
      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: <CVAPI_DOC_FILE2> TYPE CVAPI_DOC_FILE2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CVAPI_DOC_FILE2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CVAPI_DOC_FILE2
  INTO TABLE IT_CVAPI_DOC_FILE2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CVAPI_DOC_FILE2
*  INTO TABLE @DATA(IT_CVAPI_DOC_FILE22).
*--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_CVAPI_DOC_FILE2 INDEX 1 INTO DATA(WA_CVAPI_DOC_FILE22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CVAPI_DOC_FILE2 ASSIGNING <CVAPI_DOC_FILE2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CVAPI_DOC_FILE2>-DOKAR = 1.
<CVAPI_DOC_FILE2>-DOKNR = 1.
<CVAPI_DOC_FILE2>-DOKVR = 1.
<CVAPI_DOC_FILE2>-DOKTL = 1.
<CVAPI_DOC_FILE2>-UPDATEFLAG = 1.

ENDLOOP.

LOOP AT IT_CVAPI_DOC_FILE2 INTO WA_CVAPI_DOC_FILE2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CVAPI_DOC_FILE2-APPNR, sy-vline,
  WA_CVAPI_DOC_FILE2-DAPPL, sy-vline,
  WA_CVAPI_DOC_FILE2-LANGU, sy-vline,
  WA_CVAPI_DOC_FILE2-ACTIVE_VERSION, sy-vline,
  WA_CVAPI_DOC_FILE2-DTTRG, sy-vline,
  WA_CVAPI_DOC_FILE2-STORAGE_CAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CVAPI_DOC_FILE2 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_CVAPI_DOC_FILE2 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_CVAPI_DOC_FILE2 INTO WA_CVAPI_DOC_FILE2.


*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 DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CVAPI_DOC_FILE2-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CVAPI_DOC_FILE2-DOKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTLC, internal->external for field CREATED_AT
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_CVAPI_DOC_FILE2-CREATED_AT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CVAPI_DOC_FILE2-CREATED_AT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTLC, internal->external for field CHANGED_AT
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_CVAPI_DOC_FILE2-CHANGED_AT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CVAPI_DOC_FILE2-CHANGED_AT.
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_CVAPI_DOC_FILE2_STR, 
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
UPDATEFLAG TYPE STRING,
APPNR TYPE STRING,
DAPPL TYPE STRING,
LANGU TYPE STRING,
ACTIVE_VERSION TYPE STRING,
DTTRG TYPE STRING,
STORAGE_CAT TYPE STRING,
PATHNAME TYPE STRING,
FILENAME TYPE STRING,
DESCRIPTION TYPE STRING,
LO_OBJID TYPE STRING,
PH_OBJID TYPE STRING,
FILE_ID TYPE STRING,
URL TYPE STRING,
CHECKED_IN TYPE STRING,
CREATED_AT TYPE STRING,
CHANGED_AT TYPE STRING,
CREATED_BY TYPE STRING,
CHANGED_BY TYPE STRING,
CONTENT_DESCRIPTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CVAPI_DOC_FILE2_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_CVAPI_DOC_FILE2_STR-DOKAR sy-vline 
WA_CVAPI_DOC_FILE2_STR-DOKNR sy-vline 
WA_CVAPI_DOC_FILE2_STR-DOKVR sy-vline 
WA_CVAPI_DOC_FILE2_STR-DOKTL sy-vline 
WA_CVAPI_DOC_FILE2_STR-UPDATEFLAG sy-vline 
WA_CVAPI_DOC_FILE2_STR-APPNR sy-vline 
WA_CVAPI_DOC_FILE2_STR-DAPPL sy-vline 
WA_CVAPI_DOC_FILE2_STR-LANGU sy-vline 
WA_CVAPI_DOC_FILE2_STR-ACTIVE_VERSION sy-vline 
WA_CVAPI_DOC_FILE2_STR-DTTRG sy-vline 
WA_CVAPI_DOC_FILE2_STR-STORAGE_CAT sy-vline 
WA_CVAPI_DOC_FILE2_STR-PATHNAME sy-vline 
WA_CVAPI_DOC_FILE2_STR-FILENAME sy-vline 
WA_CVAPI_DOC_FILE2_STR-DESCRIPTION sy-vline 
WA_CVAPI_DOC_FILE2_STR-LO_OBJID sy-vline 
WA_CVAPI_DOC_FILE2_STR-PH_OBJID sy-vline 
WA_CVAPI_DOC_FILE2_STR-FILE_ID sy-vline 
WA_CVAPI_DOC_FILE2_STR-URL sy-vline 
WA_CVAPI_DOC_FILE2_STR-CHECKED_IN sy-vline 
WA_CVAPI_DOC_FILE2_STR-CREATED_AT sy-vline 
WA_CVAPI_DOC_FILE2_STR-CHANGED_AT sy-vline 
WA_CVAPI_DOC_FILE2_STR-CREATED_BY sy-vline 
WA_CVAPI_DOC_FILE2_STR-CHANGED_BY sy-vline 
WA_CVAPI_DOC_FILE2_STR-CONTENT_DESCRIPTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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