ABAP Select data from SAP table SLS_YTEST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SLS_YTEST
*  INTO TABLE @DATA(IT_SLS_YTEST2).
*--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_SLS_YTEST INDEX 1 INTO DATA(WA_SLS_YTEST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SLS_YTEST>-MANDT = 1.
<SLS_YTEST>-PETID = 1.
<SLS_YTEST>-CDATE = 1.
<SLS_YTEST>-TESTID = 1.
<SLS_YTEST>-STID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SLS_YTEST-PUID, sy-vline,
  WA_SLS_YTEST-SEQUNO, sy-vline,
  WA_SLS_YTEST-RTYPE, sy-vline,
  WA_SLS_YTEST-RPER, sy-vline,
  WA_SLS_YTEST-RPT, sy-vline,
  WA_SLS_YTEST-PASS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SLS_YTEST 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_SLS_YTEST 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_SLS_YTEST INTO WA_SLS_YTEST.


*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_SLS_YTEST_STR, 
MANDT TYPE STRING,
PETID TYPE STRING,
CDATE TYPE STRING,
TESTID TYPE STRING,
STID TYPE STRING,
PUID TYPE STRING,
SEQUNO TYPE STRING,
RTYPE TYPE STRING,
RPER TYPE STRING,
RPT TYPE STRING,
PASS TYPE STRING,
CUSER TYPE STRING,
MARK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SLS_YTEST_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_SLS_YTEST_STR-MANDT sy-vline 
WA_SLS_YTEST_STR-PETID sy-vline 
WA_SLS_YTEST_STR-CDATE sy-vline 
WA_SLS_YTEST_STR-TESTID sy-vline 
WA_SLS_YTEST_STR-STID sy-vline 
WA_SLS_YTEST_STR-PUID sy-vline 
WA_SLS_YTEST_STR-SEQUNO sy-vline 
WA_SLS_YTEST_STR-RTYPE sy-vline 
WA_SLS_YTEST_STR-RPER sy-vline 
WA_SLS_YTEST_STR-RPT sy-vline 
WA_SLS_YTEST_STR-PASS sy-vline 
WA_SLS_YTEST_STR-CUSER sy-vline 
WA_SLS_YTEST_STR-MARK sy-vline      INTO ld_text SEPARATED BY SPACE.

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