ABAP Select data from SAP table ICL_DIAGHIST_SEL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ICL_DIAGHIST_SEL 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_DIAGHIST_SEL. 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_DIAGHIST_SEL 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_DIAGHIST_SEL TYPE STANDARD TABLE OF ICL_DIAGHIST_SEL,
      WA_ICL_DIAGHIST_SEL TYPE ICL_DIAGHIST_SEL,
      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_DIAGHIST_SEL> TYPE ICL_DIAGHIST_SEL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICL_DIAGHIST_SEL
*  INTO TABLE @DATA(IT_ICL_DIAGHIST_SEL2).
*--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_DIAGHIST_SEL INDEX 1 INTO DATA(WA_ICL_DIAGHIST_SEL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICL_DIAGHIST_SEL>-CLIENT = 1.
<ICL_DIAGHIST_SEL>-CLAIM = 1.
<ICL_DIAGHIST_SEL>-BPARTNER = 1.
<ICL_DIAGHIST_SEL>-PATIENT = 1.
<ICL_DIAGHIST_SEL>-DATEFROM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICL_DIAGHIST_SEL-ENDDATE, sy-vline,
  WA_ICL_DIAGHIST_SEL-SUBOBJCAT, sy-vline,
  WA_ICL_DIAGHIST_SEL-SUBOBJECT, sy-vline,
  WA_ICL_DIAGHIST_SEL-DIAGSRCCAT, sy-vline,
  WA_ICL_DIAGHIST_SEL-DIAGSRCID, sy-vline,
  WA_ICL_DIAGHIST_SEL-CATAID1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICL_DIAGHIST_SEL 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_DIAGHIST_SEL 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_DIAGHIST_SEL INTO WA_ICL_DIAGHIST_SEL.


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

*Conversion exit ALPHA, internal->external for field BPARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICL_DIAGHIST_SEL-BPARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICL_DIAGHIST_SEL-BPARTNER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DIAID, internal->external for field DIAGID1
CALL FUNCTION 'CONVERSION_EXIT_DIAID_OUTPUT'
  EXPORTING
    input =                      WA_ICL_DIAGHIST_SEL-DIAGID1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICL_DIAGHIST_SEL-DIAGID1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DIAID, internal->external for field DIAGID2
CALL FUNCTION 'CONVERSION_EXIT_DIAID_OUTPUT'
  EXPORTING
    input =                      WA_ICL_DIAGHIST_SEL-DIAGID2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICL_DIAGHIST_SEL-DIAGID2.
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_DIAGHIST_SEL_STR, 
CLIENT TYPE STRING,
CLAIM TYPE STRING,
BPARTNER TYPE STRING,
PATIENT TYPE STRING,
DATEFROM TYPE STRING,
ENDDATE TYPE STRING,
SUBOBJCAT TYPE STRING,
SUBOBJECT TYPE STRING,
DIAGSRCCAT TYPE STRING,
DIAGSRCID TYPE STRING,
CATAID1 TYPE STRING,
DIAGID1 TYPE STRING,
DIAGID2 TYPE STRING,
DESCRIPTION TYPE STRING,
DIAGTYPE TYPE STRING,
LOCALIZATION TYPE STRING,
SEVERITYCODE TYPE STRING,
MORPHOLOGY TYPE STRING,
EXCORIATION TYPE STRING,
GUARANTEE TYPE STRING,
DEPARTMENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICL_DIAGHIST_SEL_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_DIAGHIST_SEL_STR-CLIENT sy-vline 
WA_ICL_DIAGHIST_SEL_STR-CLAIM sy-vline 
WA_ICL_DIAGHIST_SEL_STR-BPARTNER sy-vline 
WA_ICL_DIAGHIST_SEL_STR-PATIENT sy-vline 
WA_ICL_DIAGHIST_SEL_STR-DATEFROM sy-vline 
WA_ICL_DIAGHIST_SEL_STR-ENDDATE sy-vline 
WA_ICL_DIAGHIST_SEL_STR-SUBOBJCAT sy-vline 
WA_ICL_DIAGHIST_SEL_STR-SUBOBJECT sy-vline 
WA_ICL_DIAGHIST_SEL_STR-DIAGSRCCAT sy-vline 
WA_ICL_DIAGHIST_SEL_STR-DIAGSRCID sy-vline 
WA_ICL_DIAGHIST_SEL_STR-CATAID1 sy-vline 
WA_ICL_DIAGHIST_SEL_STR-DIAGID1 sy-vline 
WA_ICL_DIAGHIST_SEL_STR-DIAGID2 sy-vline 
WA_ICL_DIAGHIST_SEL_STR-DESCRIPTION sy-vline 
WA_ICL_DIAGHIST_SEL_STR-DIAGTYPE sy-vline 
WA_ICL_DIAGHIST_SEL_STR-LOCALIZATION sy-vline 
WA_ICL_DIAGHIST_SEL_STR-SEVERITYCODE sy-vline 
WA_ICL_DIAGHIST_SEL_STR-MORPHOLOGY sy-vline 
WA_ICL_DIAGHIST_SEL_STR-EXCORIATION sy-vline 
WA_ICL_DIAGHIST_SEL_STR-GUARANTEE sy-vline 
WA_ICL_DIAGHIST_SEL_STR-DEPARTMENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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