ABAP Select data from SAP table AVISCCNPART into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AVISCCNPART
*  INTO TABLE @DATA(IT_AVISCCNPART2).
*--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_AVISCCNPART INDEX 1 INTO DATA(WA_AVISCCNPART2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AVISCCNPART>-MANDT = 1.
<AVISCCNPART>-SU_OBJNR = 1.
<AVISCCNPART>-CN_OBJNR = 1.
<AVISCCNPART>-RO_OBJNR = 1.
<AVISCCNPART>-VALIDTO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AVISCCNPART-VALIDFROM, sy-vline,
  WA_AVISCCNPART-PARTTYPE, sy-vline,
  WA_AVISCCNPART-PTENANT, sy-vline,
  WA_AVISCCNPART-CONDTYPE, sy-vline,
  WA_AVISCCNPART-CONDGUID, sy-vline,
  WA_AVISCCNPART-CONDVALIDFROM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AVISCCNPART 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_AVISCCNPART 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_AVISCCNPART INTO WA_AVISCCNPART.


*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 REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_AVISCCNPART-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AVISCCNPART-VALIDTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CONDTYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AVISCCNPART-CONDTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AVISCCNPART-CONDTYPE.
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_AVISCCNPART_STR, 
MANDT TYPE STRING,
SU_OBJNR TYPE STRING,
CN_OBJNR TYPE STRING,
RO_OBJNR TYPE STRING,
VALIDTO TYPE STRING,
VALIDFROM TYPE STRING,
PARTTYPE TYPE STRING,
PTENANT TYPE STRING,
CONDTYPE TYPE STRING,
CONDGUID TYPE STRING,
CONDVALIDFROM TYPE STRING,
CURRENCY TYPE STRING,
MAXCOSTSU TYPE STRING,
BASE TYPE STRING,
BASEAMOUNT TYPE STRING,
BASEDATE TYPE STRING,
RERF TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
REHER TYPE STRING,
RBEAR TYPE STRING,
DBEAR TYPE STRING,
TBEAR TYPE STRING,
RBHER TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AVISCCNPART_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_AVISCCNPART_STR-MANDT sy-vline 
WA_AVISCCNPART_STR-SU_OBJNR sy-vline 
WA_AVISCCNPART_STR-CN_OBJNR sy-vline 
WA_AVISCCNPART_STR-RO_OBJNR sy-vline 
WA_AVISCCNPART_STR-VALIDTO sy-vline 
WA_AVISCCNPART_STR-VALIDFROM sy-vline 
WA_AVISCCNPART_STR-PARTTYPE sy-vline 
WA_AVISCCNPART_STR-PTENANT sy-vline 
WA_AVISCCNPART_STR-CONDTYPE sy-vline 
WA_AVISCCNPART_STR-CONDGUID sy-vline 
WA_AVISCCNPART_STR-CONDVALIDFROM sy-vline 
WA_AVISCCNPART_STR-CURRENCY sy-vline 
WA_AVISCCNPART_STR-MAXCOSTSU sy-vline 
WA_AVISCCNPART_STR-BASE sy-vline 
WA_AVISCCNPART_STR-BASEAMOUNT sy-vline 
WA_AVISCCNPART_STR-BASEDATE sy-vline 
WA_AVISCCNPART_STR-RERF sy-vline 
WA_AVISCCNPART_STR-DERF sy-vline 
WA_AVISCCNPART_STR-TERF sy-vline 
WA_AVISCCNPART_STR-REHER sy-vline 
WA_AVISCCNPART_STR-RBEAR sy-vline 
WA_AVISCCNPART_STR-DBEAR sy-vline 
WA_AVISCCNPART_STR-TBEAR sy-vline 
WA_AVISCCNPART_STR-RBHER sy-vline 
WA_AVISCCNPART_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.