ABAP Select data from SAP table ICL_DIHDR into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICL_DIHDR
*  INTO TABLE @DATA(IT_ICL_DIHDR2).
*--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_ICL_DIHDR INDEX 1 INTO DATA(WA_ICL_DIHDR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICL_DIHDR>-AKTYP = 1.
<ICL_DIHDR>-RLTP1 = 1.
<ICL_DIHDR>-RLTP2 = 1.
<ICL_DIHDR>-RLTP3 = 1.
<ICL_DIHDR>-RLTP4 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICL_DIHDR-RLTP5, sy-vline,
  WA_ICL_DIHDR-RLTP6, sy-vline,
  WA_ICL_DIHDR-RLTP7, sy-vline,
  WA_ICL_DIHDR-RLTP8, sy-vline,
  WA_ICL_DIHDR-RLTP9, sy-vline,
  WA_ICL_DIHDR-POLICY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICL_DIHDR 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_ICL_DIHDR 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_ICL_DIHDR INTO WA_ICL_DIHDR.


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

*Conversion exit ALPHA, internal->external for field CLAIM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICL_DIHDR-CLAIM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICL_DIHDR-CLAIM.
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_ICL_DIHDR_STR, 
AKTYP TYPE STRING,
RLTP1 TYPE STRING,
RLTP2 TYPE STRING,
RLTP3 TYPE STRING,
RLTP4 TYPE STRING,
RLTP5 TYPE STRING,
RLTP6 TYPE STRING,
RLTP7 TYPE STRING,
RLTP8 TYPE STRING,
RLTP9 TYPE STRING,
POLICY TYPE STRING,
POLREIMPORT TYPE STRING,
POLPROD TYPE STRING,
PLINEOFBUS TYPE STRING,
LOSSTYPE TYPE STRING,
DATELOSS TYPE STRING,
XDATEESTIM TYPE STRING,
TIMELOSS TYPE STRING,
CLAIM TYPE STRING,
EXCLAIMNOCAT TYPE STRING,
EXCLAIMNO TYPE STRING,
EXHANDLE TYPE STRING,
LOCKOBJ TYPE STRING,
XSKIPDUPLCHECK TYPE STRING,
XDUMMCLAIM TYPE STRING,
MIGCONTROL TYPE STRING,
LTIMEZONE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICL_DIHDR_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_ICL_DIHDR_STR-AKTYP sy-vline 
WA_ICL_DIHDR_STR-RLTP1 sy-vline 
WA_ICL_DIHDR_STR-RLTP2 sy-vline 
WA_ICL_DIHDR_STR-RLTP3 sy-vline 
WA_ICL_DIHDR_STR-RLTP4 sy-vline 
WA_ICL_DIHDR_STR-RLTP5 sy-vline 
WA_ICL_DIHDR_STR-RLTP6 sy-vline 
WA_ICL_DIHDR_STR-RLTP7 sy-vline 
WA_ICL_DIHDR_STR-RLTP8 sy-vline 
WA_ICL_DIHDR_STR-RLTP9 sy-vline 
WA_ICL_DIHDR_STR-POLICY sy-vline 
WA_ICL_DIHDR_STR-POLREIMPORT sy-vline 
WA_ICL_DIHDR_STR-POLPROD sy-vline 
WA_ICL_DIHDR_STR-PLINEOFBUS sy-vline 
WA_ICL_DIHDR_STR-LOSSTYPE sy-vline 
WA_ICL_DIHDR_STR-DATELOSS sy-vline 
WA_ICL_DIHDR_STR-XDATEESTIM sy-vline 
WA_ICL_DIHDR_STR-TIMELOSS sy-vline 
WA_ICL_DIHDR_STR-CLAIM sy-vline 
WA_ICL_DIHDR_STR-EXCLAIMNOCAT sy-vline 
WA_ICL_DIHDR_STR-EXCLAIMNO sy-vline 
WA_ICL_DIHDR_STR-EXHANDLE sy-vline 
WA_ICL_DIHDR_STR-LOCKOBJ sy-vline 
WA_ICL_DIHDR_STR-XSKIPDUPLCHECK sy-vline 
WA_ICL_DIHDR_STR-XDUMMCLAIM sy-vline 
WA_ICL_DIHDR_STR-MIGCONTROL sy-vline 
WA_ICL_DIHDR_STR-LTIMEZONE sy-vline      INTO ld_text SEPARATED BY SPACE.

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