ABAP Select data from SAP table HHKCPFC0_ALV1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP HHKCPFC0_ALV1 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 HHKCPFC0_ALV1. 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 HHKCPFC0_ALV1 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_HHKCPFC0_ALV1 TYPE STANDARD TABLE OF HHKCPFC0_ALV1,
      WA_HHKCPFC0_ALV1 TYPE HHKCPFC0_ALV1,
      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: <HHKCPFC0_ALV1> TYPE HHKCPFC0_ALV1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_HHKCPFC0_ALV1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM HHKCPFC0_ALV1
  INTO TABLE IT_HHKCPFC0_ALV1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HHKCPFC0_ALV1
*  INTO TABLE @DATA(IT_HHKCPFC0_ALV12).
*--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_HHKCPFC0_ALV1 INDEX 1 INTO DATA(WA_HHKCPFC0_ALV12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_HHKCPFC0_ALV1 ASSIGNING <HHKCPFC0_ALV1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HHKCPFC0_ALV1>-PERNR = 1.
<HHKCPFC0_ALV1>-NACHN = 1.
<HHKCPFC0_ALV1>-VORNA = 1.
<HHKCPFC0_ALV1>-EETYP = 1.
<HHKCPFC0_ALV1>-IDNUM = 1.

ENDLOOP.

LOOP AT IT_HHKCPFC0_ALV1 INTO WA_HHKCPFC0_ALV1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HHKCPFC0_ALV1-JOIND, sy-vline,
  WA_HHKCPFC0_ALV1-FPBEG, sy-vline,
  WA_HHKCPFC0_ALV1-FPEND, sy-vline,
  WA_HHKCPFC0_ALV1-CONTY, sy-vline,
  WA_HHKCPFC0_ALV1-BASIS, sy-vline,
  WA_HHKCPFC0_ALV1-ERMCO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HHKCPFC0_ALV1 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_HHKCPFC0_ALV1 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_HHKCPFC0_ALV1 INTO WA_HHKCPFC0_ALV1.


*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_HHKCPFC0_ALV1_STR, 
PERNR TYPE STRING,
NACHN TYPE STRING,
VORNA TYPE STRING,
EETYP TYPE STRING,
IDNUM TYPE STRING,
JOIND TYPE STRING,
FPBEG TYPE STRING,
FPEND TYPE STRING,
CONTY TYPE STRING,
BASIS TYPE STRING,
ERMCO TYPE STRING,
ERNCO TYPE STRING,
EEMCO TYPE STRING,
EENCO TYPE STRING,
HIRED TYPE STRING,
FIRED TYPE STRING,
RSNCO TYPE STRING,
TTYPE TYPE STRING,
COLOR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HHKCPFC0_ALV1_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_HHKCPFC0_ALV1_STR-PERNR sy-vline 
WA_HHKCPFC0_ALV1_STR-NACHN sy-vline 
WA_HHKCPFC0_ALV1_STR-VORNA sy-vline 
WA_HHKCPFC0_ALV1_STR-EETYP sy-vline 
WA_HHKCPFC0_ALV1_STR-IDNUM sy-vline 
WA_HHKCPFC0_ALV1_STR-JOIND sy-vline 
WA_HHKCPFC0_ALV1_STR-FPBEG sy-vline 
WA_HHKCPFC0_ALV1_STR-FPEND sy-vline 
WA_HHKCPFC0_ALV1_STR-CONTY sy-vline 
WA_HHKCPFC0_ALV1_STR-BASIS sy-vline 
WA_HHKCPFC0_ALV1_STR-ERMCO sy-vline 
WA_HHKCPFC0_ALV1_STR-ERNCO sy-vline 
WA_HHKCPFC0_ALV1_STR-EEMCO sy-vline 
WA_HHKCPFC0_ALV1_STR-EENCO sy-vline 
WA_HHKCPFC0_ALV1_STR-HIRED sy-vline 
WA_HHKCPFC0_ALV1_STR-FIRED sy-vline 
WA_HHKCPFC0_ALV1_STR-RSNCO sy-vline 
WA_HHKCPFC0_ALV1_STR-TTYPE sy-vline 
WA_HHKCPFC0_ALV1_STR-COLOR sy-vline      INTO ld_text SEPARATED BY SPACE.

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