ABAP Select data from SAP table LXYRD_REG_SEL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LXYRD_REG_SEL
*  INTO TABLE @DATA(IT_LXYRD_REG_SEL2).
*--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_LXYRD_REG_SEL INDEX 1 INTO DATA(WA_LXYRD_REG_SEL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LXYRD_REG_SEL>-TIME_INT = 1.
<LXYRD_REG_SEL>-DATE = 1.
<LXYRD_REG_SEL>-TIME = 1.
<LXYRD_REG_SEL>-STATS = 1.
<LXYRD_REG_SEL>-RFTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LXYRD_REG_SEL-REFER, sy-vline,
  WA_LXYRD_REG_SEL-FWAGN, sy-vline,
  WA_LXYRD_REG_SEL-SCACD, sy-vline,
  WA_LXYRD_REG_SEL-LIFNR, sy-vline,
  WA_LXYRD_REG_SEL-SIGNI, sy-vline,
  WA_LXYRD_REG_SEL-EXIDV2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LXYRD_REG_SEL 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_LXYRD_REG_SEL 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_LXYRD_REG_SEL INTO WA_LXYRD_REG_SEL.


*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 ALPHA, internal->external for field REFER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LXYRD_REG_SEL-REFER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LXYRD_REG_SEL-REFER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FWAGN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LXYRD_REG_SEL-FWAGN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LXYRD_REG_SEL-FWAGN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LXYRD_REG_SEL-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LXYRD_REG_SEL-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field VHILM
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_LXYRD_REG_SEL-VHILM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LXYRD_REG_SEL-VHILM.
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_LXYRD_REG_SEL_STR, 
TIME_INT TYPE STRING,
DATE TYPE STRING,
TIME TYPE STRING,
STATS TYPE STRING,
RFTYP TYPE STRING,
REFER TYPE STRING,
FWAGN TYPE STRING,
SCACD TYPE STRING,
LIFNR TYPE STRING,
SIGNI TYPE STRING,
EXIDV2 TYPE STRING,
VHART TYPE STRING,
VHILM TYPE STRING,
NAMEF TYPE STRING,
YLCCL TYPE STRING,
YLOCT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LXYRD_REG_SEL_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_LXYRD_REG_SEL_STR-TIME_INT sy-vline 
WA_LXYRD_REG_SEL_STR-DATE sy-vline 
WA_LXYRD_REG_SEL_STR-TIME sy-vline 
WA_LXYRD_REG_SEL_STR-STATS sy-vline 
WA_LXYRD_REG_SEL_STR-RFTYP sy-vline 
WA_LXYRD_REG_SEL_STR-REFER sy-vline 
WA_LXYRD_REG_SEL_STR-FWAGN sy-vline 
WA_LXYRD_REG_SEL_STR-SCACD sy-vline 
WA_LXYRD_REG_SEL_STR-LIFNR sy-vline 
WA_LXYRD_REG_SEL_STR-SIGNI sy-vline 
WA_LXYRD_REG_SEL_STR-EXIDV2 sy-vline 
WA_LXYRD_REG_SEL_STR-VHART sy-vline 
WA_LXYRD_REG_SEL_STR-VHILM sy-vline 
WA_LXYRD_REG_SEL_STR-NAMEF sy-vline 
WA_LXYRD_REG_SEL_STR-YLCCL sy-vline 
WA_LXYRD_REG_SEL_STR-YLOCT sy-vline      INTO ld_text SEPARATED BY SPACE.

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