ABAP Select data from SAP table DATASETS_ST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DATASETS_ST
*  INTO TABLE @DATA(IT_DATASETS_ST2).
*--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_DATASETS_ST INDEX 1 INTO DATA(WA_DATASETS_ST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DATASETS_ST>-PARTNER = 1.
<DATASETS_ST>-ORG_DATA = 1.
<DATASETS_ST>-STATUS = 1.
<DATASETS_ST>-TEXTS = 1.
<DATASETS_ST>-USER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DATASETS_ST-UNLOCK, sy-vline,
  WA_DATASETS_ST-CONTROL, sy-vline,
  WA_DATASETS_ST-PROGRESS, sy-vline,
  WA_DATASETS_ST-CUSTOMER, sy-vline,
  WA_DATASETS_ST-ACL, sy-vline,
  WA_DATASETS_ST-SETTLEMENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DATASETS_ST 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_DATASETS_ST 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_DATASETS_ST INTO WA_DATASETS_ST.


*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_DATASETS_ST_STR, 
PARTNER TYPE STRING,
ORG_DATA TYPE STRING,
STATUS TYPE STRING,
TEXTS TYPE STRING,
USER TYPE STRING,
UNLOCK TYPE STRING,
CONTROL TYPE STRING,
PROGRESS TYPE STRING,
CUSTOMER TYPE STRING,
ACL TYPE STRING,
SETTLEMENT TYPE STRING,
DISPLAY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DATASETS_ST_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_DATASETS_ST_STR-PARTNER sy-vline 
WA_DATASETS_ST_STR-ORG_DATA sy-vline 
WA_DATASETS_ST_STR-STATUS sy-vline 
WA_DATASETS_ST_STR-TEXTS sy-vline 
WA_DATASETS_ST_STR-USER sy-vline 
WA_DATASETS_ST_STR-UNLOCK sy-vline 
WA_DATASETS_ST_STR-CONTROL sy-vline 
WA_DATASETS_ST_STR-PROGRESS sy-vline 
WA_DATASETS_ST_STR-CUSTOMER sy-vline 
WA_DATASETS_ST_STR-ACL sy-vline 
WA_DATASETS_ST_STR-SETTLEMENT sy-vline 
WA_DATASETS_ST_STR-DISPLAY sy-vline      INTO ld_text SEPARATED BY SPACE.

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