ABAP Select data from SAP table ASSET_ALV_TREE_IN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ASSET_ALV_TREE_IN
*  INTO TABLE @DATA(IT_ASSET_ALV_TREE_IN2).
*--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_ASSET_ALV_TREE_IN INDEX 1 INTO DATA(WA_ASSET_ALV_TREE_IN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ASSET_ALV_TREE_IN>-SEQ_NO = 1.
<ASSET_ALV_TREE_IN>-BUKRS = 1.
<ASSET_ALV_TREE_IN>-ANLN1 = 1.
<ASSET_ALV_TREE_IN>-TXT50 = 1.
<ASSET_ALV_TREE_IN>-ANLN2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ASSET_ALV_TREE_IN-GSBER, sy-vline,
  WA_ASSET_ALV_TREE_IN-GJAHR, sy-vline,
  WA_ASSET_ALV_TREE_IN-LNRAN, sy-vline,
  WA_ASSET_ALV_TREE_IN-ANLKL, sy-vline,
  WA_ASSET_ALV_TREE_IN-EBELN, sy-vline,
  WA_ASSET_ALV_TREE_IN-EBELP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ASSET_ALV_TREE_IN 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_ASSET_ALV_TREE_IN 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_ASSET_ALV_TREE_IN INTO WA_ASSET_ALV_TREE_IN.


*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 ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ASSET_ALV_TREE_IN-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASSET_ALV_TREE_IN-ANLN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ASSET_ALV_TREE_IN-ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASSET_ALV_TREE_IN-ANLN2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ASSET_ALV_TREE_IN-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASSET_ALV_TREE_IN-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit GJAHR, internal->external for field FIGJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ASSET_ALV_TREE_IN-FIGJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASSET_ALV_TREE_IN-FIGJAHR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ABPSP, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_ASSET_ALV_TREE_IN-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASSET_ALV_TREE_IN-PS_PSP_PNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WBGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_ASSET_ALV_TREE_IN-WBGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASSET_ALV_TREE_IN-WBGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field WBABTR
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ASSET_ALV_TREE_IN-WBABTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASSET_ALV_TREE_IN-WBABTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field ANBTR
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ASSET_ALV_TREE_IN-ANBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASSET_ALV_TREE_IN-ANBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ASSET_ALV_TREE_IN-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASSET_ALV_TREE_IN-BELNR.
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_ASSET_ALV_TREE_IN_STR, 
SEQ_NO TYPE STRING,
BUKRS TYPE STRING,
ANLN1 TYPE STRING,
TXT50 TYPE STRING,
ANLN2 TYPE STRING,
GSBER TYPE STRING,
GJAHR TYPE STRING,
LNRAN TYPE STRING,
ANLKL TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
FIGJAHR TYPE STRING,
FIBELNR TYPE STRING,
COBUZEI TYPE STRING,
PS_PSP_PNR TYPE STRING,
POST1 TYPE STRING,
WBGBTR TYPE STRING,
TOT_WAERS TYPE STRING,
WBABTR TYPE STRING,
WBS_WAERS TYPE STRING,
ANBTR TYPE STRING,
ACQ_WAERS TYPE STRING,
BELNR TYPE STRING,
AWTYP TYPE STRING,
TCODE TYPE STRING,
BUDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ASSET_ALV_TREE_IN_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_ASSET_ALV_TREE_IN_STR-SEQ_NO sy-vline 
WA_ASSET_ALV_TREE_IN_STR-BUKRS sy-vline 
WA_ASSET_ALV_TREE_IN_STR-ANLN1 sy-vline 
WA_ASSET_ALV_TREE_IN_STR-TXT50 sy-vline 
WA_ASSET_ALV_TREE_IN_STR-ANLN2 sy-vline 
WA_ASSET_ALV_TREE_IN_STR-GSBER sy-vline 
WA_ASSET_ALV_TREE_IN_STR-GJAHR sy-vline 
WA_ASSET_ALV_TREE_IN_STR-LNRAN sy-vline 
WA_ASSET_ALV_TREE_IN_STR-ANLKL sy-vline 
WA_ASSET_ALV_TREE_IN_STR-EBELN sy-vline 
WA_ASSET_ALV_TREE_IN_STR-EBELP sy-vline 
WA_ASSET_ALV_TREE_IN_STR-FIGJAHR sy-vline 
WA_ASSET_ALV_TREE_IN_STR-FIBELNR sy-vline 
WA_ASSET_ALV_TREE_IN_STR-COBUZEI sy-vline 
WA_ASSET_ALV_TREE_IN_STR-PS_PSP_PNR sy-vline 
WA_ASSET_ALV_TREE_IN_STR-POST1 sy-vline 
WA_ASSET_ALV_TREE_IN_STR-WBGBTR sy-vline 
WA_ASSET_ALV_TREE_IN_STR-TOT_WAERS sy-vline 
WA_ASSET_ALV_TREE_IN_STR-WBABTR sy-vline 
WA_ASSET_ALV_TREE_IN_STR-WBS_WAERS sy-vline 
WA_ASSET_ALV_TREE_IN_STR-ANBTR sy-vline 
WA_ASSET_ALV_TREE_IN_STR-ACQ_WAERS sy-vline 
WA_ASSET_ALV_TREE_IN_STR-BELNR sy-vline 
WA_ASSET_ALV_TREE_IN_STR-AWTYP sy-vline 
WA_ASSET_ALV_TREE_IN_STR-TCODE sy-vline 
WA_ASSET_ALV_TREE_IN_STR-BUDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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