ABAP Select data from SAP table LLGRH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LLGRH
*  INTO TABLE @DATA(IT_LLGRH2).
*--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_LLGRH INDEX 1 INTO DATA(WA_LLGRH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LLGRH>-MANDT = 1.
<LLGRH>-LOCAT = 1.
<LLGRH>-REQST = 1.
<LLGRH>-TSTMP = 1.
<LLGRH>-MTHOD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LLGRH-ORGLV1DC, sy-vline,
  WA_LLGRH-ORGLV2DC, sy-vline,
  WA_LLGRH-ORGLV3DC, sy-vline,
  WA_LLGRH-ORGLV1GR, sy-vline,
  WA_LLGRH-ORGLV2GR, sy-vline,
  WA_LLGRH-ORGLV3GR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LLGRH 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_LLGRH 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_LLGRH INTO WA_LLGRH.


*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 TSTRM, internal->external for field TSTMP
CALL FUNCTION 'CONVERSION_EXIT_TSTRM_OUTPUT'
  EXPORTING
    input =                      WA_LLGRH-TSTMP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LLGRH-TSTMP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRM, internal->external for field DDATE
CALL FUNCTION 'CONVERSION_EXIT_TSTRM_OUTPUT'
  EXPORTING
    input =                      WA_LLGRH-DDATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LLGRH-DDATE.
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_LLGRH_STR, 
MANDT TYPE STRING,
LOCAT TYPE STRING,
REQST TYPE STRING,
TSTMP TYPE STRING,
MTHOD TYPE STRING,
ORGLV1DC TYPE STRING,
ORGLV2DC TYPE STRING,
ORGLV3DC TYPE STRING,
ORGLV1GR TYPE STRING,
ORGLV2GR TYPE STRING,
ORGLV3GR TYPE STRING,
REFER TYPE STRING,
REFTY TYPE STRING,
PRORR TYPE STRING,
DDATE TYPE STRING,
GRREF TYPE STRING,
GRRLS TYPE STRING,
LTRM_DUMMY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LLGRH_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_LLGRH_STR-MANDT sy-vline 
WA_LLGRH_STR-LOCAT sy-vline 
WA_LLGRH_STR-REQST sy-vline 
WA_LLGRH_STR-TSTMP sy-vline 
WA_LLGRH_STR-MTHOD sy-vline 
WA_LLGRH_STR-ORGLV1DC sy-vline 
WA_LLGRH_STR-ORGLV2DC sy-vline 
WA_LLGRH_STR-ORGLV3DC sy-vline 
WA_LLGRH_STR-ORGLV1GR sy-vline 
WA_LLGRH_STR-ORGLV2GR sy-vline 
WA_LLGRH_STR-ORGLV3GR sy-vline 
WA_LLGRH_STR-REFER sy-vline 
WA_LLGRH_STR-REFTY sy-vline 
WA_LLGRH_STR-PRORR sy-vline 
WA_LLGRH_STR-DDATE sy-vline 
WA_LLGRH_STR-GRREF sy-vline 
WA_LLGRH_STR-GRRLS sy-vline 
WA_LLGRH_STR-LTRM_DUMMY sy-vline      INTO ld_text SEPARATED BY SPACE.

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