ABAP Select data from SAP table /SAPDMC/LSRATT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPDMC/LSRATT 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 /SAPDMC/LSRATT. 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 /SAPDMC/LSRATT 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_/SAPDMC/LSRATT TYPE STANDARD TABLE OF /SAPDMC/LSRATT,
      WA_/SAPDMC/LSRATT TYPE /SAPDMC/LSRATT,
      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: </SAPDMC/LSRATT> TYPE /SAPDMC/LSRATT.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPDMC/LSRATT
  INTO TABLE IT_/SAPDMC/LSRATT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPDMC/LSRATT
*  INTO TABLE @DATA(IT_/SAPDMC/LSRATT2).
*--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_/SAPDMC/LSRATT INDEX 1 INTO DATA(WA_/SAPDMC/LSRATT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPDMC/LSRATT ASSIGNING </SAPDMC/LSRATT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPDMC/LSRATT>-PROJECT = 1.
</SAPDMC/LSRATT>-RULETYPE = 1.
</SAPDMC/LSRATT>-RULENAME = 1.
</SAPDMC/LSRATT>-VARIANT1 = 1.
</SAPDMC/LSRATT>-VARIANT2 = 1.

ENDLOOP.

LOOP AT IT_/SAPDMC/LSRATT INTO WA_/SAPDMC/LSRATT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPDMC/LSRATT-VARIANT3, sy-vline,
  WA_/SAPDMC/LSRATT-TRGLEN, sy-vline,
  WA_/SAPDMC/LSRATT-TRGTYPE, sy-vline,
  WA_/SAPDMC/LSRATT-TRGLOWERCASE, sy-vline,
  WA_/SAPDMC/LSRATT-SRCLEN, sy-vline,
  WA_/SAPDMC/LSRATT-SRCTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPDMC/LSRATT 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_/SAPDMC/LSRATT 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_/SAPDMC/LSRATT INTO WA_/SAPDMC/LSRATT.


*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.

*Conversion exit DTYPE, internal->external for field TRGTYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_/SAPDMC/LSRATT-TRGTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPDMC/LSRATT-TRGTYPE.
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_/SAPDMC/LSRATT_STR, 
PROJECT TYPE STRING,
RULETYPE TYPE STRING,
RULENAME TYPE STRING,
VARIANT1 TYPE STRING,
VARIANT2 TYPE STRING,
VARIANT3 TYPE STRING,
TRGLEN TYPE STRING,
TRGTYPE TYPE STRING,
TRGLOWERCASE TYPE STRING,
SRCLEN TYPE STRING,
SRCTYPE TYPE STRING,
SRCLOWERCASE TYPE STRING,
CONSTANT TYPE STRING,
ROUTINE TYPE STRING,
XCOLLECTVALUES TYPE STRING,
FIXEDVALUE TYPE STRING,
INPARS TYPE STRING,
OUTPARS TYPE STRING,
UNAME TYPE STRING,
DATUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPDMC/LSRATT_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_/SAPDMC/LSRATT_STR-PROJECT sy-vline 
WA_/SAPDMC/LSRATT_STR-RULETYPE sy-vline 
WA_/SAPDMC/LSRATT_STR-RULENAME sy-vline 
WA_/SAPDMC/LSRATT_STR-VARIANT1 sy-vline 
WA_/SAPDMC/LSRATT_STR-VARIANT2 sy-vline 
WA_/SAPDMC/LSRATT_STR-VARIANT3 sy-vline 
WA_/SAPDMC/LSRATT_STR-TRGLEN sy-vline 
WA_/SAPDMC/LSRATT_STR-TRGTYPE sy-vline 
WA_/SAPDMC/LSRATT_STR-TRGLOWERCASE sy-vline 
WA_/SAPDMC/LSRATT_STR-SRCLEN sy-vline 
WA_/SAPDMC/LSRATT_STR-SRCTYPE sy-vline 
WA_/SAPDMC/LSRATT_STR-SRCLOWERCASE sy-vline 
WA_/SAPDMC/LSRATT_STR-CONSTANT sy-vline 
WA_/SAPDMC/LSRATT_STR-ROUTINE sy-vline 
WA_/SAPDMC/LSRATT_STR-XCOLLECTVALUES sy-vline 
WA_/SAPDMC/LSRATT_STR-FIXEDVALUE sy-vline 
WA_/SAPDMC/LSRATT_STR-INPARS sy-vline 
WA_/SAPDMC/LSRATT_STR-OUTPARS sy-vline 
WA_/SAPDMC/LSRATT_STR-UNAME sy-vline 
WA_/SAPDMC/LSRATT_STR-DATUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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