ABAP Select data from SAP table SLS_PET into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SLS_PET 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_PET. 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_PET 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_PET TYPE STANDARD TABLE OF SLS_PET,
      WA_SLS_PET TYPE SLS_PET,
      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_PET> TYPE SLS_PET.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SLS_PET
*  INTO TABLE @DATA(IT_SLS_PET2).
*--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_PET INDEX 1 INTO DATA(WA_SLS_PET2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SLS_PET>-MANDT = 1.
<SLS_PET>-PETID = 1.
<SLS_PET>-PATYP = 1.
<SLS_PET>-PARID = 1.
<SLS_PET>-PLVAR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SLS_PET-EVEID, sy-vline,
  WA_SLS_PET-NO_TEM, sy-vline,
  WA_SLS_PET-TESTID, sy-vline,
  WA_SLS_PET-TFORM, sy-vline,
  WA_SLS_PET-TTYID, sy-vline,
  WA_SLS_PET-TLIGHT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SLS_PET 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_PET 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_PET INTO WA_SLS_PET.


*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_PET_STR, 
MANDT TYPE STRING,
PETID TYPE STRING,
PATYP TYPE STRING,
PARID TYPE STRING,
PLVAR TYPE STRING,
EVEID TYPE STRING,
NO_TEM TYPE STRING,
TESTID TYPE STRING,
TFORM TYPE STRING,
TTYID TYPE STRING,
TLIGHT TYPE STRING,
NBOOK TYPE STRING,
RESID TYPE STRING,
REFLAG TYPE STRING,
REFIRS TYPE STRING,
RELAST TYPE STRING,
POSTED TYPE STRING,
ERROR TYPE STRING,
DELET TYPE STRING,
IMPORT TYPE STRING,
UTIME TYPE STRING,
RFLAG TYPE STRING,
TPORT TYPE STRING,
CFLAG TYPE STRING,
TDATE TYPE STRING,
STARTTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SLS_PET_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_PET_STR-MANDT sy-vline 
WA_SLS_PET_STR-PETID sy-vline 
WA_SLS_PET_STR-PATYP sy-vline 
WA_SLS_PET_STR-PARID sy-vline 
WA_SLS_PET_STR-PLVAR sy-vline 
WA_SLS_PET_STR-EVEID sy-vline 
WA_SLS_PET_STR-NO_TEM sy-vline 
WA_SLS_PET_STR-TESTID sy-vline 
WA_SLS_PET_STR-TFORM sy-vline 
WA_SLS_PET_STR-TTYID sy-vline 
WA_SLS_PET_STR-TLIGHT sy-vline 
WA_SLS_PET_STR-NBOOK sy-vline 
WA_SLS_PET_STR-RESID sy-vline 
WA_SLS_PET_STR-REFLAG sy-vline 
WA_SLS_PET_STR-REFIRS sy-vline 
WA_SLS_PET_STR-RELAST sy-vline 
WA_SLS_PET_STR-POSTED sy-vline 
WA_SLS_PET_STR-ERROR sy-vline 
WA_SLS_PET_STR-DELET sy-vline 
WA_SLS_PET_STR-IMPORT sy-vline 
WA_SLS_PET_STR-UTIME sy-vline 
WA_SLS_PET_STR-RFLAG sy-vline 
WA_SLS_PET_STR-TPORT sy-vline 
WA_SLS_PET_STR-CFLAG sy-vline 
WA_SLS_PET_STR-TDATE sy-vline 
WA_SLS_PET_STR-STARTTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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