ABAP Select data from SAP table TNAUMLEI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TNAUMLEI
*  INTO TABLE @DATA(IT_TNAUMLEI2).
*--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_TNAUMLEI INDEX 1 INTO DATA(WA_TNAUMLEI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TNAUMLEI>-MANDT = 1.
<TNAUMLEI>-EINRI = 1.
<TNAUMLEI>-LSTKAT = 1.
<TNAUMLEI>-LEIST = 1.
<TNAUMLEI>-FALAE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TNAUMLEI-FATYP, sy-vline,
  WA_TNAUMLEI-KLFART, sy-vline,
  WA_TNAUMLEI-BWART, sy-vline,
  WA_TNAUMLEI-ERBOE, sy-vline,
  WA_TNAUMLEI-KTART, sy-vline,
  WA_TNAUMLEI-KOSTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TNAUMLEI 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_TNAUMLEI 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_TNAUMLEI INTO WA_TNAUMLEI.


*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 EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TNAUMLEI-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNAUMLEI-EINRI.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field RGART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TNAUMLEI-RGART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNAUMLEI-RGART.
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_TNAUMLEI_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
LSTKAT TYPE STRING,
LEIST TYPE STRING,
FALAE TYPE STRING,
FATYP TYPE STRING,
KLFART TYPE STRING,
BWART TYPE STRING,
ERBOE TYPE STRING,
KTART TYPE STRING,
KOSTR TYPE STRING,
SELBST TYPE STRING,
ABRKAT TYPE STRING,
ABRLEI TYPE STRING,
BEGDT TYPE STRING,
POSNO TYPE STRING,
ENDDT TYPE STRING,
MENGE TYPE STRING,
MENGFIX TYPE STRING,
KZ TYPE STRING,
NLSLOK TYPE STRING,
GSCHLE TYPE STRING,
RGART TYPE STRING,
ALGRTY TYPE STRING,
ALTGR TYPE STRING,
ALTAUF TYPE STRING,
AUSLEIST_NABRBAR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TNAUMLEI_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_TNAUMLEI_STR-MANDT sy-vline 
WA_TNAUMLEI_STR-EINRI sy-vline 
WA_TNAUMLEI_STR-LSTKAT sy-vline 
WA_TNAUMLEI_STR-LEIST sy-vline 
WA_TNAUMLEI_STR-FALAE sy-vline 
WA_TNAUMLEI_STR-FATYP sy-vline 
WA_TNAUMLEI_STR-KLFART sy-vline 
WA_TNAUMLEI_STR-BWART sy-vline 
WA_TNAUMLEI_STR-ERBOE sy-vline 
WA_TNAUMLEI_STR-KTART sy-vline 
WA_TNAUMLEI_STR-KOSTR sy-vline 
WA_TNAUMLEI_STR-SELBST sy-vline 
WA_TNAUMLEI_STR-ABRKAT sy-vline 
WA_TNAUMLEI_STR-ABRLEI sy-vline 
WA_TNAUMLEI_STR-BEGDT sy-vline 
WA_TNAUMLEI_STR-POSNO sy-vline 
WA_TNAUMLEI_STR-ENDDT sy-vline 
WA_TNAUMLEI_STR-MENGE sy-vline 
WA_TNAUMLEI_STR-MENGFIX sy-vline 
WA_TNAUMLEI_STR-KZ sy-vline 
WA_TNAUMLEI_STR-NLSLOK sy-vline 
WA_TNAUMLEI_STR-GSCHLE sy-vline 
WA_TNAUMLEI_STR-RGART sy-vline 
WA_TNAUMLEI_STR-ALGRTY sy-vline 
WA_TNAUMLEI_STR-ALTGR sy-vline 
WA_TNAUMLEI_STR-ALTAUF sy-vline 
WA_TNAUMLEI_STR-AUSLEIST_NABRBAR sy-vline      INTO ld_text SEPARATED BY SPACE.

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