ABAP Select data from SAP table ALMTMPLNOD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ALMTMPLNOD
*  INTO TABLE @DATA(IT_ALMTMPLNOD2).
*--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_ALMTMPLNOD INDEX 1 INTO DATA(WA_ALMTMPLNOD2).


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

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

ENDLOOP.

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

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


*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_ALMTMPLNOD_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,
DEPTH TYPE STRING,
TYPE TYPE STRING,
INFO TYPE STRING,
XMIMSGCLS TYPE STRING,
XMIMSGID TYPE STRING,
PARAM1 TYPE STRING,
PARAM2 TYPE STRING,
PARAM3 TYPE STRING,
PARAM4 TYPE STRING,
MTECLASS TYPE STRING,
MTEDISPOPT TYPE STRING,
SHSYSID TYPE STRING,
SHCONTEXT TYPE STRING,
SHOBJECT TYPE STRING,
SHATTR TYPE STRING,
SHRESNODES TYPE STRING,
NODNAMRULE TYPE STRING,
PARAMBAG TYPE STRING,
MDEFNDGUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ALMTMPLNOD_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_ALMTMPLNOD_STR-NODE_KEY sy-vline 
WA_ALMTMPLNOD_STR-PARENT_KEY sy-vline 
WA_ALMTMPLNOD_STR-NAME sy-vline 
WA_ALMTMPLNOD_STR-TID sy-vline 
WA_ALMTMPLNOD_STR-MTSYSID sy-vline 
WA_ALMTMPLNOD_STR-MTMCNAME sy-vline 
WA_ALMTMPLNOD_STR-MTNUMRANGE sy-vline 
WA_ALMTMPLNOD_STR-MTUID sy-vline 
WA_ALMTMPLNOD_STR-MTCLASS sy-vline 
WA_ALMTMPLNOD_STR-MTINDEX sy-vline 
WA_ALMTMPLNOD_STR-EXTINDEX sy-vline 
WA_ALMTMPLNOD_STR-DEPTH sy-vline 
WA_ALMTMPLNOD_STR-TYPE sy-vline 
WA_ALMTMPLNOD_STR-INFO sy-vline 
WA_ALMTMPLNOD_STR-XMIMSGCLS sy-vline 
WA_ALMTMPLNOD_STR-XMIMSGID sy-vline 
WA_ALMTMPLNOD_STR-PARAM1 sy-vline 
WA_ALMTMPLNOD_STR-PARAM2 sy-vline 
WA_ALMTMPLNOD_STR-PARAM3 sy-vline 
WA_ALMTMPLNOD_STR-PARAM4 sy-vline 
WA_ALMTMPLNOD_STR-MTECLASS sy-vline 
WA_ALMTMPLNOD_STR-MTEDISPOPT sy-vline 
WA_ALMTMPLNOD_STR-SHSYSID sy-vline 
WA_ALMTMPLNOD_STR-SHCONTEXT sy-vline 
WA_ALMTMPLNOD_STR-SHOBJECT sy-vline 
WA_ALMTMPLNOD_STR-SHATTR sy-vline 
WA_ALMTMPLNOD_STR-SHRESNODES sy-vline 
WA_ALMTMPLNOD_STR-NODNAMRULE sy-vline 
WA_ALMTMPLNOD_STR-PARAMBAG sy-vline 
WA_ALMTMPLNOD_STR-MDEFNDGUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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