ABAP Select data from SAP table /POA/S_CLM_FIELD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /POA/S_CLM_FIELD 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 /POA/S_CLM_FIELD. 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 /POA/S_CLM_FIELD 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_/POA/S_CLM_FIELD TYPE STANDARD TABLE OF /POA/S_CLM_FIELD,
      WA_/POA/S_CLM_FIELD TYPE /POA/S_CLM_FIELD,
      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: </POA/S_CLM_FIELD> TYPE /POA/S_CLM_FIELD.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /POA/S_CLM_FIELD
  INTO TABLE IT_/POA/S_CLM_FIELD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /POA/S_CLM_FIELD
*  INTO TABLE @DATA(IT_/POA/S_CLM_FIELD2).
*--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_/POA/S_CLM_FIELD INDEX 1 INTO DATA(WA_/POA/S_CLM_FIELD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/POA/S_CLM_FIELD ASSIGNING </POA/S_CLM_FIELD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</POA/S_CLM_FIELD>-ENTITYTYPE = 1.
</POA/S_CLM_FIELD>-FIELDNAME = 1.
</POA/S_CLM_FIELD>-FIELDTYPE = 1.
</POA/S_CLM_FIELD>-SCHEMATYPE = 1.
</POA/S_CLM_FIELD>-FIELDLABEL = 1.

ENDLOOP.

LOOP AT IT_/POA/S_CLM_FIELD INTO WA_/POA/S_CLM_FIELD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/POA/S_CLM_FIELD-NILLABLE, sy-vline,
  WA_/POA/S_CLM_FIELD-MINOCCURS, sy-vline,
  WA_/POA/S_CLM_FIELD-MAXOCCURS, sy-vline,
  WA_/POA/S_CLM_FIELD-ATTRUSE, sy-vline,
  WA_/POA/S_CLM_FIELD-MINLENGTH, sy-vline,
  WA_/POA/S_CLM_FIELD-MAXLENGTH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/POA/S_CLM_FIELD 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_/POA/S_CLM_FIELD 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_/POA/S_CLM_FIELD INTO WA_/POA/S_CLM_FIELD.


*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_/POA/S_CLM_FIELD_STR, 
ENTITYTYPE TYPE STRING,
FIELDNAME TYPE STRING,
FIELDTYPE TYPE STRING,
SCHEMATYPE TYPE STRING,
FIELDLABEL TYPE STRING,
NILLABLE TYPE STRING,
MINOCCURS TYPE STRING,
MAXOCCURS TYPE STRING,
ATTRUSE TYPE STRING,
MINLENGTH TYPE STRING,
MAXLENGTH TYPE STRING,
PATTERN TYPE STRING,
KEYNAME TYPE STRING,
KEYREFNAME TYPE STRING,
REFER TYPE STRING,
SELECTORPATH TYPE STRING,
FIELDPATH TYPE STRING,
CHOICE TYPE STRING,
DEFAULTVALUE TYPE STRING,
BASETYPE TYPE STRING,
TOTALDIGITS TYPE STRING,
FRACTIONDIGITS TYPE STRING,
FIELDVALUES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/POA/S_CLM_FIELD_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_/POA/S_CLM_FIELD_STR-ENTITYTYPE sy-vline 
WA_/POA/S_CLM_FIELD_STR-FIELDNAME sy-vline 
WA_/POA/S_CLM_FIELD_STR-FIELDTYPE sy-vline 
WA_/POA/S_CLM_FIELD_STR-SCHEMATYPE sy-vline 
WA_/POA/S_CLM_FIELD_STR-FIELDLABEL sy-vline 
WA_/POA/S_CLM_FIELD_STR-NILLABLE sy-vline 
WA_/POA/S_CLM_FIELD_STR-MINOCCURS sy-vline 
WA_/POA/S_CLM_FIELD_STR-MAXOCCURS sy-vline 
WA_/POA/S_CLM_FIELD_STR-ATTRUSE sy-vline 
WA_/POA/S_CLM_FIELD_STR-MINLENGTH sy-vline 
WA_/POA/S_CLM_FIELD_STR-MAXLENGTH sy-vline 
WA_/POA/S_CLM_FIELD_STR-PATTERN sy-vline 
WA_/POA/S_CLM_FIELD_STR-KEYNAME sy-vline 
WA_/POA/S_CLM_FIELD_STR-KEYREFNAME sy-vline 
WA_/POA/S_CLM_FIELD_STR-REFER sy-vline 
WA_/POA/S_CLM_FIELD_STR-SELECTORPATH sy-vline 
WA_/POA/S_CLM_FIELD_STR-FIELDPATH sy-vline 
WA_/POA/S_CLM_FIELD_STR-CHOICE sy-vline 
WA_/POA/S_CLM_FIELD_STR-DEFAULTVALUE sy-vline 
WA_/POA/S_CLM_FIELD_STR-BASETYPE sy-vline 
WA_/POA/S_CLM_FIELD_STR-TOTALDIGITS sy-vline 
WA_/POA/S_CLM_FIELD_STR-FRACTIONDIGITS sy-vline 
WA_/POA/S_CLM_FIELD_STR-FIELDVALUES sy-vline      INTO ld_text SEPARATED BY SPACE.

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