ABAP Select data from SAP table ALDBSMTE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ALDBSMTE
*  INTO TABLE @DATA(IT_ALDBSMTE2).
*--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_ALDBSMTE INDEX 1 INTO DATA(WA_ALDBSMTE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ALDBSMTE>-MTSYSID = 1.
<ALDBSMTE>-MTMCNAME = 1.
<ALDBSMTE>-MTNUMRANGE = 1.
<ALDBSMTE>-MTUID = 1.
<ALDBSMTE>-MTCLASS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ALDBSMTE-P_MTSYSID, sy-vline,
  WA_ALDBSMTE-P_MTMCNAME, sy-vline,
  WA_ALDBSMTE-P_MTNUMRG, sy-vline,
  WA_ALDBSMTE-P_MTUID, sy-vline,
  WA_ALDBSMTE-P_MTCLASS, sy-vline,
  WA_ALDBSMTE-SEGMENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ALDBSMTE 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_ALDBSMTE 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_ALDBSMTE INTO WA_ALDBSMTE.


*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_ALDBSMTE_STR, 
MTSYSID TYPE STRING,
MTMCNAME TYPE STRING,
MTNUMRANGE TYPE STRING,
MTUID TYPE STRING,
MTCLASS TYPE STRING,
P_MTSYSID TYPE STRING,
P_MTMCNAME TYPE STRING,
P_MTNUMRG TYPE STRING,
P_MTUID TYPE STRING,
P_MTCLASS TYPE STRING,
SEGMENT TYPE STRING,
SHORTNAME TYPE STRING,
MTECLASS TYPE STRING,
MTESUBCLAS TYPE STRING,
OBJECTNAME TYPE STRING,
MTESTATUS TYPE STRING,
MTESUBTYPE TYPE STRING,
CUSTSTAT TYPE STRING,
CLASORSPEC TYPE STRING,
SEVERITY TYPE STRING,
VISILEVEL TYPE STRING,
KEEPALTYPE TYPE STRING,
KEEPALMAX TYPE STRING,
SECTILCOLT TYPE STRING,
SECTILINAC TYPE STRING,
SECWARMUPT TYPE STRING,
DTEXTCLASS TYPE STRING,
DTEXTID TYPE STRING,
DELIVERSTA TYPE STRING,
HIGHALVAL TYPE STRING,
HIGHALSEV TYPE STRING,
ALSYSID TYPE STRING,
MSEGNAME TYPE STRING,
ALUNIQNUM TYPE STRING,
ALERTDATE TYPE STRING,
ALERTTIME TYPE STRING,
LASTVALDAT TYPE STRING,
LASTVALTIM TYPE STRING,
CURVALVAL TYPE STRING,
CURVALSEV TYPE STRING,
CUR_ASYSID TYPE STRING,
CUR_AMSEG TYPE STRING,
CUR_AUID TYPE STRING,
CUR_ADATE TYPE STRING,
CUR_ATIME TYPE STRING,
COUNTOFACT TYPE STRING,
COUNTSUM TYPE STRING,
TRGTDEFNAM TYPE STRING,
TRGTDEFDSP TYPE STRING,
TRGTDEFSTA TYPE STRING,
TRGTDEFCOS TYPE STRING,
ANATDEFNAM TYPE STRING,
ANATDEFDSP TYPE STRING,
ANATDEFSTA TYPE STRING,
ANATDEFCOS TYPE STRING,
ONATDEFNAM TYPE STRING,
ONATDEFDSP TYPE STRING,
ONATDEFSTA TYPE STRING,
ONATDEFCOS TYPE STRING,
TRGTRUNNAM TYPE STRING,
TRGTRUNSTA TYPE STRING,
TRGTRUNDAT TYPE STRING,
TRGTRUNTIM TYPE STRING,
TRGTRUNDSP TYPE STRING,
ONATRUNNAM TYPE STRING,
ONATRUNSTA TYPE STRING,
ONATRUNDAT TYPE STRING,
ONATRUNTIM TYPE STRING,
ONATRUNDSP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ALDBSMTE_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_ALDBSMTE_STR-MTSYSID sy-vline 
WA_ALDBSMTE_STR-MTMCNAME sy-vline 
WA_ALDBSMTE_STR-MTNUMRANGE sy-vline 
WA_ALDBSMTE_STR-MTUID sy-vline 
WA_ALDBSMTE_STR-MTCLASS sy-vline 
WA_ALDBSMTE_STR-P_MTSYSID sy-vline 
WA_ALDBSMTE_STR-P_MTMCNAME sy-vline 
WA_ALDBSMTE_STR-P_MTNUMRG sy-vline 
WA_ALDBSMTE_STR-P_MTUID sy-vline 
WA_ALDBSMTE_STR-P_MTCLASS sy-vline 
WA_ALDBSMTE_STR-SEGMENT sy-vline 
WA_ALDBSMTE_STR-SHORTNAME sy-vline 
WA_ALDBSMTE_STR-MTECLASS sy-vline 
WA_ALDBSMTE_STR-MTESUBCLAS sy-vline 
WA_ALDBSMTE_STR-OBJECTNAME sy-vline 
WA_ALDBSMTE_STR-MTESTATUS sy-vline 
WA_ALDBSMTE_STR-MTESUBTYPE sy-vline 
WA_ALDBSMTE_STR-CUSTSTAT sy-vline 
WA_ALDBSMTE_STR-CLASORSPEC sy-vline 
WA_ALDBSMTE_STR-SEVERITY sy-vline 
WA_ALDBSMTE_STR-VISILEVEL sy-vline 
WA_ALDBSMTE_STR-KEEPALTYPE sy-vline 
WA_ALDBSMTE_STR-KEEPALMAX sy-vline 
WA_ALDBSMTE_STR-SECTILCOLT sy-vline 
WA_ALDBSMTE_STR-SECTILINAC sy-vline 
WA_ALDBSMTE_STR-SECWARMUPT sy-vline 
WA_ALDBSMTE_STR-DTEXTCLASS sy-vline 
WA_ALDBSMTE_STR-DTEXTID sy-vline 
WA_ALDBSMTE_STR-DELIVERSTA sy-vline 
WA_ALDBSMTE_STR-HIGHALVAL sy-vline 
WA_ALDBSMTE_STR-HIGHALSEV sy-vline 
WA_ALDBSMTE_STR-ALSYSID sy-vline 
WA_ALDBSMTE_STR-MSEGNAME sy-vline 
WA_ALDBSMTE_STR-ALUNIQNUM sy-vline 
WA_ALDBSMTE_STR-ALERTDATE sy-vline 
WA_ALDBSMTE_STR-ALERTTIME sy-vline 
WA_ALDBSMTE_STR-LASTVALDAT sy-vline 
WA_ALDBSMTE_STR-LASTVALTIM sy-vline 
WA_ALDBSMTE_STR-CURVALVAL sy-vline 
WA_ALDBSMTE_STR-CURVALSEV sy-vline 
WA_ALDBSMTE_STR-CUR_ASYSID sy-vline 
WA_ALDBSMTE_STR-CUR_AMSEG sy-vline 
WA_ALDBSMTE_STR-CUR_AUID sy-vline 
WA_ALDBSMTE_STR-CUR_ADATE sy-vline 
WA_ALDBSMTE_STR-CUR_ATIME sy-vline 
WA_ALDBSMTE_STR-COUNTOFACT sy-vline 
WA_ALDBSMTE_STR-COUNTSUM sy-vline 
WA_ALDBSMTE_STR-TRGTDEFNAM sy-vline 
WA_ALDBSMTE_STR-TRGTDEFDSP sy-vline 
WA_ALDBSMTE_STR-TRGTDEFSTA sy-vline 
WA_ALDBSMTE_STR-TRGTDEFCOS sy-vline 
WA_ALDBSMTE_STR-ANATDEFNAM sy-vline 
WA_ALDBSMTE_STR-ANATDEFDSP sy-vline 
WA_ALDBSMTE_STR-ANATDEFSTA sy-vline 
WA_ALDBSMTE_STR-ANATDEFCOS sy-vline 
WA_ALDBSMTE_STR-ONATDEFNAM sy-vline 
WA_ALDBSMTE_STR-ONATDEFDSP sy-vline 
WA_ALDBSMTE_STR-ONATDEFSTA sy-vline 
WA_ALDBSMTE_STR-ONATDEFCOS sy-vline 
WA_ALDBSMTE_STR-TRGTRUNNAM sy-vline 
WA_ALDBSMTE_STR-TRGTRUNSTA sy-vline 
WA_ALDBSMTE_STR-TRGTRUNDAT sy-vline 
WA_ALDBSMTE_STR-TRGTRUNTIM sy-vline 
WA_ALDBSMTE_STR-TRGTRUNDSP sy-vline 
WA_ALDBSMTE_STR-ONATRUNNAM sy-vline 
WA_ALDBSMTE_STR-ONATRUNSTA sy-vline 
WA_ALDBSMTE_STR-ONATRUNDAT sy-vline 
WA_ALDBSMTE_STR-ONATRUNTIM sy-vline 
WA_ALDBSMTE_STR-ONATRUNDSP sy-vline      INTO ld_text SEPARATED BY SPACE.

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