ABAP Select data from SAP table SNWD_TB2_MOCK into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SNWD_TB2_MOCK 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 SNWD_TB2_MOCK. 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 SNWD_TB2_MOCK 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_SNWD_TB2_MOCK TYPE STANDARD TABLE OF SNWD_TB2_MOCK,
      WA_SNWD_TB2_MOCK TYPE SNWD_TB2_MOCK,
      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: <SNWD_TB2_MOCK> TYPE SNWD_TB2_MOCK.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_SNWD_TB2_MOCK.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM SNWD_TB2_MOCK
  INTO TABLE IT_SNWD_TB2_MOCK.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SNWD_TB2_MOCK
*  INTO TABLE @DATA(IT_SNWD_TB2_MOCK2).
*--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_SNWD_TB2_MOCK INDEX 1 INTO DATA(WA_SNWD_TB2_MOCK2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_SNWD_TB2_MOCK ASSIGNING <SNWD_TB2_MOCK>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SNWD_TB2_MOCK>-CLIENT = 1.
<SNWD_TB2_MOCK>-KEY1 = 1.
<SNWD_TB2_MOCK>-KEY2 = 1.
<SNWD_TB2_MOCK>-KEY3 = 1.
<SNWD_TB2_MOCK>-TIMESTAMP = 1.

ENDLOOP.

LOOP AT IT_SNWD_TB2_MOCK INTO WA_SNWD_TB2_MOCK.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SNWD_TB2_MOCK-DATAREF1, sy-vline,
  WA_SNWD_TB2_MOCK-DATAREF2, sy-vline,
  WA_SNWD_TB2_MOCK-DATAREF3, sy-vline,
  WA_SNWD_TB2_MOCK-DATA1, sy-vline,
  WA_SNWD_TB2_MOCK-DATA2, sy-vline,
  WA_SNWD_TB2_MOCK-DATA3, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SNWD_TB2_MOCK 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_SNWD_TB2_MOCK 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_SNWD_TB2_MOCK INTO WA_SNWD_TB2_MOCK.


*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_SNWD_TB2_MOCK_STR, 
CLIENT TYPE STRING,
KEY1 TYPE STRING,
KEY2 TYPE STRING,
KEY3 TYPE STRING,
TIMESTAMP TYPE STRING,
DATAREF1 TYPE STRING,
DATAREF2 TYPE STRING,
DATAREF3 TYPE STRING,
DATA1 TYPE STRING,
DATA2 TYPE STRING,
DATA3 TYPE STRING,
PROCESSOR TYPE STRING,
CHANGEDBY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SNWD_TB2_MOCK_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_SNWD_TB2_MOCK_STR-CLIENT sy-vline 
WA_SNWD_TB2_MOCK_STR-KEY1 sy-vline 
WA_SNWD_TB2_MOCK_STR-KEY2 sy-vline 
WA_SNWD_TB2_MOCK_STR-KEY3 sy-vline 
WA_SNWD_TB2_MOCK_STR-TIMESTAMP sy-vline 
WA_SNWD_TB2_MOCK_STR-DATAREF1 sy-vline 
WA_SNWD_TB2_MOCK_STR-DATAREF2 sy-vline 
WA_SNWD_TB2_MOCK_STR-DATAREF3 sy-vline 
WA_SNWD_TB2_MOCK_STR-DATA1 sy-vline 
WA_SNWD_TB2_MOCK_STR-DATA2 sy-vline 
WA_SNWD_TB2_MOCK_STR-DATA3 sy-vline 
WA_SNWD_TB2_MOCK_STR-PROCESSOR sy-vline 
WA_SNWD_TB2_MOCK_STR-CHANGEDBY sy-vline      INTO ld_text SEPARATED BY SPACE.

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