ABAP Select data from SAP table A2G_ATTR000003 into internal table



Get Example source ABAP code based on a different SAP table
  

So we all know S/4Hana is the latest version and the future of SAP but what about the selecting data from hana tables, is it 5he same and what do tables like A2G_ATTR000003 look like in an S/4 system. If you havent seen or logged into an S/4Hana system you might be surprised at how similar it looks to the previous ERP/ECC version. Infact when using the gui it is difficult to tell the difference, and selecting data from database tables the same is true. Infact even for tables that have been replaced in hana, SAP have purposfully created versions of the old/original tables for backward compatability. This means your existing ABAP code will still work while you implement changes that take advantage of the new functionality and Hana in-memory tables.

Below is a number of ABAP code snippets to demonstrate how to select data from SAP A2G_ATTR000003 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 A2G_ATTR000003. See here for more generic Select statement tips.

DATA: IT_A2G_ATTR000003 TYPE STANDARD TABLE OF A2G_ATTR000003,
      WA_A2G_ATTR000003 TYPE A2G_ATTR000003,
      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: <A2G_ATTR000003> TYPE A2G_ATTR000003.

*Process all fields in table header/work area as string values, full declaration of the A2G_ATTR000003 
*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.
  PERFORM process_as_string_field_values CHANGING wa_A2G_ATTR000003.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM A2G_ATTR000003
  INTO TABLE IT_A2G_ATTR000003.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM A2G_ATTR000003
*  INTO TABLE @DATA(IT_A2G_ATTR0000032).
*--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_A2G_ATTR000003 INDEX 1 INTO DATA(WA_A2G_ATTR0000032).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_A2G_ATTR000003 ASSIGNING <A2G_ATTR000003>.
*To update a field value using a field symbol simply change the value via the field symbol pointer
<A2G_ATTR000003>-CLIENT = 1.
<A2G_ATTR000003>-OBJECT_GUID = 1.
<A2G_ATTR000003>-VALUE_KEY = 1.
<A2G_ATTR000003>-VALID_FROM = 1.
<A2G_ATTR000003>-ATTR_VALUE = 1.
ENDLOOP.

LOOP AT IT_A2G_ATTR000003 INTO WA_A2G_ATTR000003.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline, ENDLOOP.
   
*Add any further fields from structure WA_A2G_ATTR000003 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_A2G_ATTR000003 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_A2G_ATTR000003 INTO WA_A2G_ATTR000003.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*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. This form converts 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 TSTPS, internal->external for field VALID_FROM CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT' EXPORTING input = WA_A2G_ATTR000003-VALID_FROM IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_A2G_ATTR000003-VALID_FROM.
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_A2G_ATTR000003_STR,
CLIENT TYPE STRING,
OBJECT_GUID TYPE STRING,
VALUE_KEY TYPE STRING,
VALID_FROM TYPE STRING,
ATTR_VALUE TYPE STRING,END OF T_EKKO_STR. DATA: WA_A2G_ATTR000003_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_A2G_ATTR000003_STR-CLIENT sy-vline
WA_A2G_ATTR000003_STR-OBJECT_GUID sy-vline
WA_A2G_ATTR000003_STR-VALUE_KEY sy-vline
WA_A2G_ATTR000003_STR-VALID_FROM sy-vline
WA_A2G_ATTR000003_STR-ATTR_VALUE sy-vline INTO ld_text SEPARATED BY SPACE. *Add any further fields from structure WA_EKKO_STR you want to CONCATENATE... ENDLOOP. ENDFORM.