ABAP Select data from SAP table ALPFUTIL_DATAEXTR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ALPFUTIL_DATAEXTR
*  INTO TABLE @DATA(IT_ALPFUTIL_DATAEXTR2).
*--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_ALPFUTIL_DATAEXTR INDEX 1 INTO DATA(WA_ALPFUTIL_DATAEXTR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ALPFUTIL_DATAEXTR>-MTSYSID = 1.
<ALPFUTIL_DATAEXTR>-MTMCNAME = 1.
<ALPFUTIL_DATAEXTR>-OBJECTNAME = 1.
<ALPFUTIL_DATAEXTR>-ATTRNAME = 1.
<ALPFUTIL_DATAEXTR>-MTECLASS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ALPFUTIL_DATAEXTR-CALSCHEMA, sy-vline,
  WA_ALPFUTIL_DATAEXTR-DAYSCHEMA, sy-vline,
  WA_ALPFUTIL_DATAEXTR-AGGREGATTYPE, sy-vline,
  WA_ALPFUTIL_DATAEXTR-RESOLUTION, sy-vline,
  WA_ALPFUTIL_DATAEXTR-XDAYX, sy-vline,
  WA_ALPFUTIL_DATAEXTR-PF_DATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ALPFUTIL_DATAEXTR 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_ALPFUTIL_DATAEXTR 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_ALPFUTIL_DATAEXTR INTO WA_ALPFUTIL_DATAEXTR.


*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_ALPFUTIL_DATAEXTR_STR, 
MTSYSID TYPE STRING,
MTMCNAME TYPE STRING,
OBJECTNAME TYPE STRING,
ATTRNAME TYPE STRING,
MTECLASS TYPE STRING,
CALSCHEMA TYPE STRING,
DAYSCHEMA TYPE STRING,
AGGREGATTYPE TYPE STRING,
RESOLUTION TYPE STRING,
XDAYX TYPE STRING,
PF_DATE TYPE STRING,
PF_TIME TYPE STRING,
PF_TIMEZONE TYPE STRING,
PF_SUM TYPE STRING,
PF_COUNT TYPE STRING,
PF_FLAG TYPE STRING,
VALUNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ALPFUTIL_DATAEXTR_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_ALPFUTIL_DATAEXTR_STR-MTSYSID sy-vline 
WA_ALPFUTIL_DATAEXTR_STR-MTMCNAME sy-vline 
WA_ALPFUTIL_DATAEXTR_STR-OBJECTNAME sy-vline 
WA_ALPFUTIL_DATAEXTR_STR-ATTRNAME sy-vline 
WA_ALPFUTIL_DATAEXTR_STR-MTECLASS sy-vline 
WA_ALPFUTIL_DATAEXTR_STR-CALSCHEMA sy-vline 
WA_ALPFUTIL_DATAEXTR_STR-DAYSCHEMA sy-vline 
WA_ALPFUTIL_DATAEXTR_STR-AGGREGATTYPE sy-vline 
WA_ALPFUTIL_DATAEXTR_STR-RESOLUTION sy-vline 
WA_ALPFUTIL_DATAEXTR_STR-XDAYX sy-vline 
WA_ALPFUTIL_DATAEXTR_STR-PF_DATE sy-vline 
WA_ALPFUTIL_DATAEXTR_STR-PF_TIME sy-vline 
WA_ALPFUTIL_DATAEXTR_STR-PF_TIMEZONE sy-vline 
WA_ALPFUTIL_DATAEXTR_STR-PF_SUM sy-vline 
WA_ALPFUTIL_DATAEXTR_STR-PF_COUNT sy-vline 
WA_ALPFUTIL_DATAEXTR_STR-PF_FLAG sy-vline 
WA_ALPFUTIL_DATAEXTR_STR-VALUNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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