ABAP Select data from SAP table SLRT0001 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SLRT0001 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 SLRT0001. 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 SLRT0001 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_SLRT0001 TYPE STANDARD TABLE OF SLRT0001,
      WA_SLRT0001 TYPE SLRT0001,
      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: <SLRT0001> TYPE SLRT0001.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_SLRT0001.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM SLRT0001
  INTO TABLE IT_SLRT0001.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SLRT0001
*  INTO TABLE @DATA(IT_SLRT00012).
*--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_SLRT0001 INDEX 1 INTO DATA(WA_SLRT00012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_SLRT0001 ASSIGNING <SLRT0001>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SLRT0001>-LGNUM = 1.
<SLRT0001>-LNUMT = 1.
<SLRT0001>-TANUM = 1.
<SLRT0001>-TAPOS = 1.
<SLRT0001>-MATNR = 1.

ENDLOOP.

LOOP AT IT_SLRT0001 INTO WA_SLRT0001.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SLRT0001-BESTQ, sy-vline,
  WA_SLRT0001-SOBKZ, sy-vline,
  WA_SLRT0001-TEXTS, sy-vline,
  WA_SLRT0001-VLTYP, sy-vline,
  WA_SLRT0001-VLPLA, sy-vline,
  WA_SLRT0001-VSOLA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SLRT0001 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_SLRT0001 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_SLRT0001 INTO WA_SLRT0001.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_SLRT0001-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLRT0001-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ALTME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_SLRT0001-ALTME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLRT0001-ALTME.
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_SLRT0001_STR, 
LGNUM TYPE STRING,
LNUMT TYPE STRING,
TANUM TYPE STRING,
TAPOS TYPE STRING,
MATNR TYPE STRING,
BESTQ TYPE STRING,
SOBKZ TYPE STRING,
TEXTS TYPE STRING,
VLTYP TYPE STRING,
VLPLA TYPE STRING,
VSOLA TYPE STRING,
ALTME TYPE STRING,
QUART TYPE STRING,
STATUSGENERAL TYPE STRING,
L2SKR TYPE STRING,
SUBSYSTEM TYPE STRING,
WERKS TYPE STRING,
CHARG TYPE STRING,
BDATU TYPE STRING,
TEXTD TYPE STRING,
NLTYP TYPE STRING,
NLPLA TYPE STRING,
NSOLA TYPE STRING,
STATUSFROMTO TYPE STRING,
TEXTR TYPE STRING,
RLTYP TYPE STRING,
RLPLA TYPE STRING,
RSOLA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SLRT0001_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_SLRT0001_STR-LGNUM sy-vline 
WA_SLRT0001_STR-LNUMT sy-vline 
WA_SLRT0001_STR-TANUM sy-vline 
WA_SLRT0001_STR-TAPOS sy-vline 
WA_SLRT0001_STR-MATNR sy-vline 
WA_SLRT0001_STR-BESTQ sy-vline 
WA_SLRT0001_STR-SOBKZ sy-vline 
WA_SLRT0001_STR-TEXTS sy-vline 
WA_SLRT0001_STR-VLTYP sy-vline 
WA_SLRT0001_STR-VLPLA sy-vline 
WA_SLRT0001_STR-VSOLA sy-vline 
WA_SLRT0001_STR-ALTME sy-vline 
WA_SLRT0001_STR-QUART sy-vline 
WA_SLRT0001_STR-STATUSGENERAL sy-vline 
WA_SLRT0001_STR-L2SKR sy-vline 
WA_SLRT0001_STR-SUBSYSTEM sy-vline 
WA_SLRT0001_STR-WERKS sy-vline 
WA_SLRT0001_STR-CHARG sy-vline 
WA_SLRT0001_STR-BDATU sy-vline 
WA_SLRT0001_STR-TEXTD sy-vline 
WA_SLRT0001_STR-NLTYP sy-vline 
WA_SLRT0001_STR-NLPLA sy-vline 
WA_SLRT0001_STR-NSOLA sy-vline 
WA_SLRT0001_STR-STATUSFROMTO sy-vline 
WA_SLRT0001_STR-TEXTR sy-vline 
WA_SLRT0001_STR-RLTYP sy-vline 
WA_SLRT0001_STR-RLPLA sy-vline 
WA_SLRT0001_STR-RSOLA sy-vline      INTO ld_text SEPARATED BY SPACE.

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