ABAP Select data from SAP table ICHPLASSIGN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICHPLASSIGN
*  INTO TABLE @DATA(IT_ICHPLASSIGN2).
*--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_ICHPLASSIGN INDEX 1 INTO DATA(WA_ICHPLASSIGN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICHPLASSIGN>-MANDT = 1.
<ICHPLASSIGN>-CHARGEPLANASSIGNMENTUUID = 1.
<ICHPLASSIGN>-CREATEDBYUSER = 1.
<ICHPLASSIGN>-CREATIONDATETIME = 1.
<ICHPLASSIGN>-LASTCHANGEDBYUSER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICHPLASSIGN-LASTCHANGEDATETIME, sy-vline,
  WA_ICHPLASSIGN-CROSSCATALOGMAPPINGVERSIONUUID, sy-vline,
  WA_ICHPLASSIGN-SUBSCRPNPRODSPECUUID, sy-vline,
  WA_ICHPLASSIGN-CHARGEPLANASSIGNMENTID, sy-vline,
  WA_ICHPLASSIGN-CHARGEPLANASSIGNMENTTYPE, sy-vline,
  WA_ICHPLASSIGN-CHARGEPLANID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICHPLASSIGN 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_ICHPLASSIGN 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_ICHPLASSIGN INTO WA_ICHPLASSIGN.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ICHPLASSIGN_STR, 
MANDT TYPE STRING,
CHARGEPLANASSIGNMENTUUID TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
CROSSCATALOGMAPPINGVERSIONUUID TYPE STRING,
SUBSCRPNPRODSPECUUID TYPE STRING,
CHARGEPLANASSIGNMENTID TYPE STRING,
CHARGEPLANASSIGNMENTTYPE TYPE STRING,
CHARGEPLANID TYPE STRING,
CHARGEPLANDESCRIPTION TYPE STRING,
CHARGEPLANACTIVATIONCONDITION TYPE STRING,
BRFFUNCTIONUUID TYPE STRING,
CHARACTERISTIC TYPE STRING,
CHARACTERISTICVALUE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICHPLASSIGN_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_ICHPLASSIGN_STR-MANDT sy-vline 
WA_ICHPLASSIGN_STR-CHARGEPLANASSIGNMENTUUID sy-vline 
WA_ICHPLASSIGN_STR-CREATEDBYUSER sy-vline 
WA_ICHPLASSIGN_STR-CREATIONDATETIME sy-vline 
WA_ICHPLASSIGN_STR-LASTCHANGEDBYUSER sy-vline 
WA_ICHPLASSIGN_STR-LASTCHANGEDATETIME sy-vline 
WA_ICHPLASSIGN_STR-CROSSCATALOGMAPPINGVERSIONUUID sy-vline 
WA_ICHPLASSIGN_STR-SUBSCRPNPRODSPECUUID sy-vline 
WA_ICHPLASSIGN_STR-CHARGEPLANASSIGNMENTID sy-vline 
WA_ICHPLASSIGN_STR-CHARGEPLANASSIGNMENTTYPE sy-vline 
WA_ICHPLASSIGN_STR-CHARGEPLANID sy-vline 
WA_ICHPLASSIGN_STR-CHARGEPLANDESCRIPTION sy-vline 
WA_ICHPLASSIGN_STR-CHARGEPLANACTIVATIONCONDITION sy-vline 
WA_ICHPLASSIGN_STR-BRFFUNCTIONUUID sy-vline 
WA_ICHPLASSIGN_STR-CHARACTERISTIC sy-vline 
WA_ICHPLASSIGN_STR-CHARACTERISTICVALUE sy-vline      INTO ld_text SEPARATED BY SPACE.

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