ABAP Select data from SAP table LYYRD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LYYRD
*  INTO TABLE @DATA(IT_LYYRD2).
*--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_LYYRD INDEX 1 INTO DATA(WA_LYYRD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LYYRD>-MANDT = 1.
<LYYRD>-LYARD = 1.
<LYYRD>-ACTNR = 1.
<LYYRD>-TMUOM = 1.
<LYYRD>-LGNUM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LYYRD-SCHHR, sy-vline,
  WA_LYYRD-SCHPR, sy-vline,
  WA_LYYRD-WGUOM, sy-vline,
  WA_LYYRD-VHILM, sy-vline,
  WA_LYYRD-DFPMT, sy-vline,
  WA_LYYRD-SLFLG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LYYRD 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_LYYRD 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_LYYRD INTO WA_LYYRD.


*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 CUNIT, internal->external for field TMUOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LYYRD-TMUOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LYYRD-TMUOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field WGUOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LYYRD-WGUOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LYYRD-WGUOM.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field DFPMT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_LYYRD-DFPMT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LYYRD-DFPMT.
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_LYYRD_STR, 
MANDT TYPE STRING,
LYARD TYPE STRING,
ACTNR TYPE STRING,
TMUOM TYPE STRING,
LGNUM TYPE STRING,
SCHHR TYPE STRING,
SCHPR TYPE STRING,
WGUOM TYPE STRING,
VHILM TYPE STRING,
DFPMT TYPE STRING,
SLFLG TYPE STRING,
SHPWT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LYYRD_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_LYYRD_STR-MANDT sy-vline 
WA_LYYRD_STR-LYARD sy-vline 
WA_LYYRD_STR-ACTNR sy-vline 
WA_LYYRD_STR-TMUOM sy-vline 
WA_LYYRD_STR-LGNUM sy-vline 
WA_LYYRD_STR-SCHHR sy-vline 
WA_LYYRD_STR-SCHPR sy-vline 
WA_LYYRD_STR-WGUOM sy-vline 
WA_LYYRD_STR-VHILM sy-vline 
WA_LYYRD_STR-DFPMT sy-vline 
WA_LYYRD_STR-SLFLG sy-vline 
WA_LYYRD_STR-SHPWT sy-vline      INTO ld_text SEPARATED BY SPACE.

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