ABAP Select data from SAP table OIA_HLPFLD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIA_HLPFLD
*  INTO TABLE @DATA(IT_OIA_HLPFLD2).
*--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_OIA_HLPFLD INDEX 1 INTO DATA(WA_OIA_HLPFLD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIA_HLPFLD>-TXTQTY1 = 1.
<OIA_HLPFLD>-TXTQTY2 = 1.
<OIA_HLPFLD>-TXTQTY3 = 1.
<OIA_HLPFLD>-ICON = 1.
<OIA_HLPFLD>-TEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIA_HLPFLD-TEXT2, sy-vline,
  WA_OIA_HLPFLD-TEXT3, sy-vline,
  WA_OIA_HLPFLD-ANDEC, sy-vline,
  WA_OIA_HLPFLD-MAXET, sy-vline,
  WA_OIA_HLPFLD-DYNNR, sy-vline,
  WA_OIA_HLPFLD-ICON2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIA_HLPFLD 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_OIA_HLPFLD 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_OIA_HLPFLD INTO WA_OIA_HLPFLD.


*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_OIA_HLPFLD_STR, 
TXTQTY1 TYPE STRING,
TXTQTY2 TYPE STRING,
TXTQTY3 TYPE STRING,
ICON TYPE STRING,
TEXT TYPE STRING,
TEXT2 TYPE STRING,
TEXT3 TYPE STRING,
ANDEC TYPE STRING,
MAXET TYPE STRING,
DYNNR TYPE STRING,
ICON2 TYPE STRING,
DMSDOCU TYPE STRING,
ICON_TOOLTIP TYPE STRING,
ICON2_TOOLTIP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIA_HLPFLD_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_OIA_HLPFLD_STR-TXTQTY1 sy-vline 
WA_OIA_HLPFLD_STR-TXTQTY2 sy-vline 
WA_OIA_HLPFLD_STR-TXTQTY3 sy-vline 
WA_OIA_HLPFLD_STR-ICON sy-vline 
WA_OIA_HLPFLD_STR-TEXT sy-vline 
WA_OIA_HLPFLD_STR-TEXT2 sy-vline 
WA_OIA_HLPFLD_STR-TEXT3 sy-vline 
WA_OIA_HLPFLD_STR-ANDEC sy-vline 
WA_OIA_HLPFLD_STR-MAXET sy-vline 
WA_OIA_HLPFLD_STR-DYNNR sy-vline 
WA_OIA_HLPFLD_STR-ICON2 sy-vline 
WA_OIA_HLPFLD_STR-DMSDOCU sy-vline 
WA_OIA_HLPFLD_STR-ICON_TOOLTIP sy-vline 
WA_OIA_HLPFLD_STR-ICON2_TOOLTIP sy-vline      INTO ld_text SEPARATED BY SPACE.

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