ABAP Select data from SAP table ALMONSTREE into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ALMONSTREE
*  INTO TABLE @DATA(IT_ALMONSTREE2).
*--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_ALMONSTREE INDEX 1 INTO DATA(WA_ALMONSTREE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ALMONSTREE>-NODE_KEY = 1.
<ALMONSTREE>-PARENT_KEY = 1.
<ALMONSTREE>-NAME = 1.
<ALMONSTREE>-TID = 1.
<ALMONSTREE>-MTSYSID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ALMONSTREE-MTMCNAME, sy-vline,
  WA_ALMONSTREE-MTNUMRANGE, sy-vline,
  WA_ALMONSTREE-MTUID, sy-vline,
  WA_ALMONSTREE-MTCLASS, sy-vline,
  WA_ALMONSTREE-MTINDEX, sy-vline,
  WA_ALMONSTREE-EXTINDEX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ALMONSTREE 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_ALMONSTREE 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_ALMONSTREE INTO WA_ALMONSTREE.


*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_ALMONSTREE_STR, 
NODE_KEY TYPE STRING,
PARENT_KEY TYPE STRING,
NAME TYPE STRING,
TID TYPE STRING,
MTSYSID TYPE STRING,
MTMCNAME TYPE STRING,
MTNUMRANGE TYPE STRING,
MTUID TYPE STRING,
MTCLASS TYPE STRING,
MTINDEX TYPE STRING,
EXTINDEX TYPE STRING,
TYPE TYPE STRING,
MTECLASS TYPE STRING,
CHILDREN TYPE STRING,
DEPTH TYPE STRING,
MAXLEVEL TYPE STRING,
MARKED TYPE STRING,
EXPCMP_ME TYPE STRING,
VISIBLE TYPE STRING,
ALWAYSHIDE TYPE STRING,
DELETE_ME TYPE STRING,
NEW_NODE TYPE STRING,
MDEFNDGUID TYPE STRING,
PARAMBAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ALMONSTREE_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_ALMONSTREE_STR-NODE_KEY sy-vline 
WA_ALMONSTREE_STR-PARENT_KEY sy-vline 
WA_ALMONSTREE_STR-NAME sy-vline 
WA_ALMONSTREE_STR-TID sy-vline 
WA_ALMONSTREE_STR-MTSYSID sy-vline 
WA_ALMONSTREE_STR-MTMCNAME sy-vline 
WA_ALMONSTREE_STR-MTNUMRANGE sy-vline 
WA_ALMONSTREE_STR-MTUID sy-vline 
WA_ALMONSTREE_STR-MTCLASS sy-vline 
WA_ALMONSTREE_STR-MTINDEX sy-vline 
WA_ALMONSTREE_STR-EXTINDEX sy-vline 
WA_ALMONSTREE_STR-TYPE sy-vline 
WA_ALMONSTREE_STR-MTECLASS sy-vline 
WA_ALMONSTREE_STR-CHILDREN sy-vline 
WA_ALMONSTREE_STR-DEPTH sy-vline 
WA_ALMONSTREE_STR-MAXLEVEL sy-vline 
WA_ALMONSTREE_STR-MARKED sy-vline 
WA_ALMONSTREE_STR-EXPCMP_ME sy-vline 
WA_ALMONSTREE_STR-VISIBLE sy-vline 
WA_ALMONSTREE_STR-ALWAYSHIDE sy-vline 
WA_ALMONSTREE_STR-DELETE_ME sy-vline 
WA_ALMONSTREE_STR-NEW_NODE sy-vline 
WA_ALMONSTREE_STR-MDEFNDGUID sy-vline 
WA_ALMONSTREE_STR-PARAMBAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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