ABAP Select data from SAP table UESLZ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM UESLZ
*  INTO TABLE @DATA(IT_UESLZ2).
*--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_UESLZ INDEX 1 INTO DATA(WA_UESLZ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<UESLZ>-MANDT = 1.
<UESLZ>-LBNUM = 1.
<UESLZ>-AUSGB = 1.
<UESLZ>-ZEILE = 1.
<UESLZ>-SORTN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_UESLZ-LOEKZ, sy-vline,
  WA_UESLZ-BLKNR, sy-vline,
  WA_UESLZ-FBLKN, sy-vline,
  WA_UESLZ-TEXTT, sy-vline,
  WA_UESLZ-MEINS, sy-vline,
  WA_UESLZ-BKLAS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_UESLZ 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_UESLZ 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_UESLZ INTO WA_UESLZ.


*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 MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_UESLZ-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_UESLZ-MEINS.
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_UESLZ_STR, 
MANDT TYPE STRING,
LBNUM TYPE STRING,
AUSGB TYPE STRING,
ZEILE TYPE STRING,
SORTN TYPE STRING,
LOEKZ TYPE STRING,
BLKNR TYPE STRING,
FBLKN TYPE STRING,
TEXTT TYPE STRING,
MEINS TYPE STRING,
BKLAS TYPE STRING,
RANG TYPE STRING,
KZFIRST TYPE STRING,
SKIPKZ TYPE STRING,
VARSYKZ TYPE STRING,
LTXT_KNR TYPE STRING,
LTXT_KTYP TYPE STRING,
KTXT_KNR TYPE STRING,
KTXT_KTYP TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_UESLZ_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_UESLZ_STR-MANDT sy-vline 
WA_UESLZ_STR-LBNUM sy-vline 
WA_UESLZ_STR-AUSGB sy-vline 
WA_UESLZ_STR-ZEILE sy-vline 
WA_UESLZ_STR-SORTN sy-vline 
WA_UESLZ_STR-LOEKZ sy-vline 
WA_UESLZ_STR-BLKNR sy-vline 
WA_UESLZ_STR-FBLKN sy-vline 
WA_UESLZ_STR-TEXTT sy-vline 
WA_UESLZ_STR-MEINS sy-vline 
WA_UESLZ_STR-BKLAS sy-vline 
WA_UESLZ_STR-RANG sy-vline 
WA_UESLZ_STR-KZFIRST sy-vline 
WA_UESLZ_STR-SKIPKZ sy-vline 
WA_UESLZ_STR-VARSYKZ sy-vline 
WA_UESLZ_STR-LTXT_KNR sy-vline 
WA_UESLZ_STR-LTXT_KTYP sy-vline 
WA_UESLZ_STR-KTXT_KNR sy-vline 
WA_UESLZ_STR-KTXT_KTYP sy-vline 
WA_UESLZ_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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