ABAP Select data from SAP table INGCCLS8 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP INGCCLS8 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 INGCCLS8. 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 INGCCLS8 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_INGCCLS8 TYPE STANDARD TABLE OF INGCCLS8,
      WA_INGCCLS8 TYPE INGCCLS8,
      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: <INGCCLS8> TYPE INGCCLS8.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_INGCCLS8.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM INGCCLS8
  INTO TABLE IT_INGCCLS8.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM INGCCLS8
*  INTO TABLE @DATA(IT_INGCCLS82).
*--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_INGCCLS8 INDEX 1 INTO DATA(WA_INGCCLS82).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_INGCCLS8 ASSIGNING <INGCCLS8>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<INGCCLS8>-MANDT = 1.
<INGCCLS8>-CLASSINTERNALID = 1.
<INGCCLS8>-CHARCINTERNALID = 1.
<INGCCLS8>-CHARCPOSITIONNUMBER = 1.
<INGCCLS8>-CHARACTERISTIC = 1.

ENDLOOP.

LOOP AT IT_INGCCLS8 INTO WA_INGCCLS8.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_INGCCLS8-ANCESTORCLASSINTERNALID, sy-vline,
  WA_INGCCLS8-CLASSTYPE, sy-vline,
  WA_INGCCLS8-CHANGENUMBER, sy-vline,
  WA_INGCCLS8-CHARCISPRINTRELEVANT, sy-vline,
  WA_INGCCLS8-CHARCISSEARCHRELEVANT, sy-vline,
  WA_INGCCLS8-CHARCISDISPLAYRELEVANT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_INGCCLS8 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_INGCCLS8 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_INGCCLS8 INTO WA_INGCCLS8.


*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 CHANGENUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_INGCCLS8-CHANGENUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_INGCCLS8-CHANGENUMBER.
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_INGCCLS8_STR, 
MANDT TYPE STRING,
CLASSINTERNALID TYPE STRING,
CHARCINTERNALID TYPE STRING,
CHARCPOSITIONNUMBER TYPE STRING,
CHARACTERISTIC TYPE STRING,
ANCESTORCLASSINTERNALID TYPE STRING,
CLASSTYPE TYPE STRING,
CHANGENUMBER TYPE STRING,
CHARCISPRINTRELEVANT TYPE STRING,
CHARCISSEARCHRELEVANT TYPE STRING,
CHARCISDISPLAYRELEVANT TYPE STRING,
CHARCISPROPOSALRELEVANT TYPE STRING,
CHARCISPRPTNORPRODUNITRELEVANT TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_INGCCLS8_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_INGCCLS8_STR-MANDT sy-vline 
WA_INGCCLS8_STR-CLASSINTERNALID sy-vline 
WA_INGCCLS8_STR-CHARCINTERNALID sy-vline 
WA_INGCCLS8_STR-CHARCPOSITIONNUMBER sy-vline 
WA_INGCCLS8_STR-CHARACTERISTIC sy-vline 
WA_INGCCLS8_STR-ANCESTORCLASSINTERNALID sy-vline 
WA_INGCCLS8_STR-CLASSTYPE sy-vline 
WA_INGCCLS8_STR-CHANGENUMBER sy-vline 
WA_INGCCLS8_STR-CHARCISPRINTRELEVANT sy-vline 
WA_INGCCLS8_STR-CHARCISSEARCHRELEVANT sy-vline 
WA_INGCCLS8_STR-CHARCISDISPLAYRELEVANT sy-vline 
WA_INGCCLS8_STR-CHARCISPROPOSALRELEVANT sy-vline 
WA_INGCCLS8_STR-CHARCISPRPTNORPRODUNITRELEVANT sy-vline 
WA_INGCCLS8_STR-VALIDITYSTARTDATE sy-vline 
WA_INGCCLS8_STR-VALIDITYENDDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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