ABAP Select data from SAP table LTR2_DSCR_PERS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LTR2_DSCR_PERS 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 LTR2_DSCR_PERS. 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 LTR2_DSCR_PERS 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_LTR2_DSCR_PERS TYPE STANDARD TABLE OF LTR2_DSCR_PERS,
      WA_LTR2_DSCR_PERS TYPE LTR2_DSCR_PERS,
      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: <LTR2_DSCR_PERS> TYPE LTR2_DSCR_PERS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_LTR2_DSCR_PERS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM LTR2_DSCR_PERS
  INTO TABLE IT_LTR2_DSCR_PERS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LTR2_DSCR_PERS
*  INTO TABLE @DATA(IT_LTR2_DSCR_PERS2).
*--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_LTR2_DSCR_PERS INDEX 1 INTO DATA(WA_LTR2_DSCR_PERS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_LTR2_DSCR_PERS ASSIGNING <LTR2_DSCR_PERS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LTR2_DSCR_PERS>-WS_GUID = 1.
<LTR2_DSCR_PERS>-LINE = 1.
<LTR2_DSCR_PERS>-LAND1 = 1.
<LTR2_DSCR_PERS>-GESCH = 1.
<LTR2_DSCR_PERS>-ANRED = 1.

ENDLOOP.

LOOP AT IT_LTR2_DSCR_PERS INTO WA_LTR2_DSCR_PERS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LTR2_DSCR_PERS-INITS, sy-vline,
  WA_LTR2_DSCR_PERS-NACHN, sy-vline,
  WA_LTR2_DSCR_PERS-NAME2, sy-vline,
  WA_LTR2_DSCR_PERS-NACH2, sy-vline,
  WA_LTR2_DSCR_PERS-VORNA, sy-vline,
  WA_LTR2_DSCR_PERS-CNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LTR2_DSCR_PERS 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_LTR2_DSCR_PERS 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_LTR2_DSCR_PERS INTO WA_LTR2_DSCR_PERS.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_LTR2_DSCR_PERS_STR, 
WS_GUID TYPE STRING,
LINE TYPE STRING,
LAND1 TYPE STRING,
GESCH TYPE STRING,
ANRED TYPE STRING,
INITS TYPE STRING,
NACHN TYPE STRING,
NAME2 TYPE STRING,
NACH2 TYPE STRING,
VORNA TYPE STRING,
CNAME TYPE STRING,
TITEL TYPE STRING,
TITL2 TYPE STRING,
NAMZU TYPE STRING,
VORSW TYPE STRING,
VORS2 TYPE STRING,
RUFNM TYPE STRING,
MIDNM TYPE STRING,
GBDAT TYPE STRING,
GBLND TYPE STRING,
GBDEP TYPE STRING,
GBORT TYPE STRING,
NATIO TYPE STRING,
NATI2 TYPE STRING,
NATI3 TYPE STRING,
SPRSL TYPE STRING,
KONFE TYPE STRING,
FAMST TYPE STRING,
FAMDT TYPE STRING,
ANZKD TYPE STRING,
NACON TYPE STRING,
PERMO TYPE STRING,
PERID TYPE STRING,
GBPAS TYPE STRING,
GBJHR TYPE STRING,
GBMON TYPE STRING,
GBTAG TYPE STRING,
NCHMC TYPE STRING,
VNAMC TYPE STRING,
NAMZ2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LTR2_DSCR_PERS_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_LTR2_DSCR_PERS_STR-WS_GUID sy-vline 
WA_LTR2_DSCR_PERS_STR-LINE sy-vline 
WA_LTR2_DSCR_PERS_STR-LAND1 sy-vline 
WA_LTR2_DSCR_PERS_STR-GESCH sy-vline 
WA_LTR2_DSCR_PERS_STR-ANRED sy-vline 
WA_LTR2_DSCR_PERS_STR-INITS sy-vline 
WA_LTR2_DSCR_PERS_STR-NACHN sy-vline 
WA_LTR2_DSCR_PERS_STR-NAME2 sy-vline 
WA_LTR2_DSCR_PERS_STR-NACH2 sy-vline 
WA_LTR2_DSCR_PERS_STR-VORNA sy-vline 
WA_LTR2_DSCR_PERS_STR-CNAME sy-vline 
WA_LTR2_DSCR_PERS_STR-TITEL sy-vline 
WA_LTR2_DSCR_PERS_STR-TITL2 sy-vline 
WA_LTR2_DSCR_PERS_STR-NAMZU sy-vline 
WA_LTR2_DSCR_PERS_STR-VORSW sy-vline 
WA_LTR2_DSCR_PERS_STR-VORS2 sy-vline 
WA_LTR2_DSCR_PERS_STR-RUFNM sy-vline 
WA_LTR2_DSCR_PERS_STR-MIDNM sy-vline 
WA_LTR2_DSCR_PERS_STR-GBDAT sy-vline 
WA_LTR2_DSCR_PERS_STR-GBLND sy-vline 
WA_LTR2_DSCR_PERS_STR-GBDEP sy-vline 
WA_LTR2_DSCR_PERS_STR-GBORT sy-vline 
WA_LTR2_DSCR_PERS_STR-NATIO sy-vline 
WA_LTR2_DSCR_PERS_STR-NATI2 sy-vline 
WA_LTR2_DSCR_PERS_STR-NATI3 sy-vline 
WA_LTR2_DSCR_PERS_STR-SPRSL sy-vline 
WA_LTR2_DSCR_PERS_STR-KONFE sy-vline 
WA_LTR2_DSCR_PERS_STR-FAMST sy-vline 
WA_LTR2_DSCR_PERS_STR-FAMDT sy-vline 
WA_LTR2_DSCR_PERS_STR-ANZKD sy-vline 
WA_LTR2_DSCR_PERS_STR-NACON sy-vline 
WA_LTR2_DSCR_PERS_STR-PERMO sy-vline 
WA_LTR2_DSCR_PERS_STR-PERID sy-vline 
WA_LTR2_DSCR_PERS_STR-GBPAS sy-vline 
WA_LTR2_DSCR_PERS_STR-GBJHR sy-vline 
WA_LTR2_DSCR_PERS_STR-GBMON sy-vline 
WA_LTR2_DSCR_PERS_STR-GBTAG sy-vline 
WA_LTR2_DSCR_PERS_STR-NCHMC sy-vline 
WA_LTR2_DSCR_PERS_STR-VNAMC sy-vline 
WA_LTR2_DSCR_PERS_STR-NAMZ2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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