ABAP Select data from SAP table IDCMLHU_POST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDCMLHU_POST
*  INTO TABLE @DATA(IT_IDCMLHU_POST2).
*--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_IDCMLHU_POST INDEX 1 INTO DATA(WA_IDCMLHU_POST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDCMLHU_POST>-SBEWART = 1.
<IDCMLHU_POST>-BCWHR = 1.
<IDCMLHU_POST>-SCWHR = 1.
<IDCMLHU_POST>-SGTXT = 1.
<IDCMLHU_POST>-DDISPO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDCMLHU_POST-ORVZBLG, sy-vline,
  WA_IDCMLHU_POST-OSBEWART, sy-vline,
  WA_IDCMLHU_POST-ACENV, sy-vline,
  WA_IDCMLHU_POST-JSOFVERR, sy-vline,
  WA_IDCMLHU_POST-DMBTR, sy-vline,
  WA_IDCMLHU_POST-KURS2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDCMLHU_POST 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_IDCMLHU_POST 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_IDCMLHU_POST INTO WA_IDCMLHU_POST.


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

*Conversion exit EXCRT, internal->external for field KURS2
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_IDCMLHU_POST-KURS2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDCMLHU_POST-KURS2.
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_IDCMLHU_POST_STR, 
SBEWART TYPE STRING,
BCWHR TYPE STRING,
SCWHR TYPE STRING,
SGTXT TYPE STRING,
DDISPO TYPE STRING,
ORVZBLG TYPE STRING,
OSBEWART TYPE STRING,
ACENV TYPE STRING,
JSOFVERR TYPE STRING,
DMBTR TYPE STRING,
KURS2 TYPE STRING,
BLDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDCMLHU_POST_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_IDCMLHU_POST_STR-SBEWART sy-vline 
WA_IDCMLHU_POST_STR-BCWHR sy-vline 
WA_IDCMLHU_POST_STR-SCWHR sy-vline 
WA_IDCMLHU_POST_STR-SGTXT sy-vline 
WA_IDCMLHU_POST_STR-DDISPO sy-vline 
WA_IDCMLHU_POST_STR-ORVZBLG sy-vline 
WA_IDCMLHU_POST_STR-OSBEWART sy-vline 
WA_IDCMLHU_POST_STR-ACENV sy-vline 
WA_IDCMLHU_POST_STR-JSOFVERR sy-vline 
WA_IDCMLHU_POST_STR-DMBTR sy-vline 
WA_IDCMLHU_POST_STR-KURS2 sy-vline 
WA_IDCMLHU_POST_STR-BLDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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