ABAP Select data from SAP table AVICPDOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AVICPDOC
*  INTO TABLE @DATA(IT_AVICPDOC2).
*--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_AVICPDOC INDEX 1 INTO DATA(WA_AVICPDOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AVICPDOC>-MANDT = 1.
<AVICPDOC>-DOCGUID = 1.
<AVICPDOC>-INTRENO = 1.
<AVICPDOC>-CPAPP = 1.
<AVICPDOC>-SUBTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AVICPDOC-OBJRELGUID, sy-vline,
  WA_AVICPDOC-PARTNER, sy-vline,
  WA_AVICPDOC-ROLE, sy-vline,
  WA_AVICPDOC-ADDRTYPE, sy-vline,
  WA_AVICPDOC-LANGU, sy-vline,
  WA_AVICPDOC-CPACT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AVICPDOC 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_AVICPDOC 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_AVICPDOC INTO WA_AVICPDOC.


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

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_AVICPDOC-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AVICPDOC-LANGU.
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_AVICPDOC_STR, 
MANDT TYPE STRING,
DOCGUID TYPE STRING,
INTRENO TYPE STRING,
CPAPP TYPE STRING,
SUBTYPE TYPE STRING,
OBJRELGUID TYPE STRING,
PARTNER TYPE STRING,
ROLE TYPE STRING,
ADDRTYPE TYPE STRING,
LANGU TYPE STRING,
CPACT TYPE STRING,
FNAME TYPE STRING,
LOGEXTNUMBER TYPE STRING,
TDCOPIESFM TYPE STRING,
TDDEVICETYPE TYPE STRING,
TDIMMED TYPE STRING,
ARCHDONE TYPE STRING,
SPOOLID TYPE STRING,
RERF TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
REHER TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AVICPDOC_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_AVICPDOC_STR-MANDT sy-vline 
WA_AVICPDOC_STR-DOCGUID sy-vline 
WA_AVICPDOC_STR-INTRENO sy-vline 
WA_AVICPDOC_STR-CPAPP sy-vline 
WA_AVICPDOC_STR-SUBTYPE sy-vline 
WA_AVICPDOC_STR-OBJRELGUID sy-vline 
WA_AVICPDOC_STR-PARTNER sy-vline 
WA_AVICPDOC_STR-ROLE sy-vline 
WA_AVICPDOC_STR-ADDRTYPE sy-vline 
WA_AVICPDOC_STR-LANGU sy-vline 
WA_AVICPDOC_STR-CPACT sy-vline 
WA_AVICPDOC_STR-FNAME sy-vline 
WA_AVICPDOC_STR-LOGEXTNUMBER sy-vline 
WA_AVICPDOC_STR-TDCOPIESFM sy-vline 
WA_AVICPDOC_STR-TDDEVICETYPE sy-vline 
WA_AVICPDOC_STR-TDIMMED sy-vline 
WA_AVICPDOC_STR-ARCHDONE sy-vline 
WA_AVICPDOC_STR-SPOOLID sy-vline 
WA_AVICPDOC_STR-RERF sy-vline 
WA_AVICPDOC_STR-DERF sy-vline 
WA_AVICPDOC_STR-TERF sy-vline 
WA_AVICPDOC_STR-REHER sy-vline 
WA_AVICPDOC_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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