ABAP Select data from SAP table ALMTMSCFIL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ALMTMSCFIL
*  INTO TABLE @DATA(IT_ALMTMSCFIL2).
*--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_ALMTMSCFIL INDEX 1 INTO DATA(WA_ALMTMSCFIL2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ALMTMSCFIL-SETNAME, sy-vline,
  WA_ALMTMSCFIL-LINENUMBER, sy-vline,
  WA_ALMTMSCFIL-MTINDEX, sy-vline,
  WA_ALMTMSCFIL-EXTINDEX, sy-vline,
  WA_ALMTMSCFIL-OBJECTNAME, sy-vline,
  WA_ALMTMSCFIL-MTNAMESHRT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ALMTMSCFIL 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_ALMTMSCFIL 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_ALMTMSCFIL INTO WA_ALMTMSCFIL.


*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_ALMTMSCFIL_STR, 
MTSYSID TYPE STRING,
MTMCNAME TYPE STRING,
MTNUMRANGE TYPE STRING,
MTUID TYPE STRING,
MTCLASS TYPE STRING,
SETNAME TYPE STRING,
LINENUMBER TYPE STRING,
MTINDEX TYPE STRING,
EXTINDEX TYPE STRING,
OBJECTNAME TYPE STRING,
MTNAMESHRT TYPE STRING,
FROMSGCLAS TYPE STRING,
FROMSGID TYPE STRING,
TOMSGCLAS TYPE STRING,
TOMSGID TYPE STRING,
MSGVALUE TYPE STRING,
SEVERITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ALMTMSCFIL_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_ALMTMSCFIL_STR-MTSYSID sy-vline 
WA_ALMTMSCFIL_STR-MTMCNAME sy-vline 
WA_ALMTMSCFIL_STR-MTNUMRANGE sy-vline 
WA_ALMTMSCFIL_STR-MTUID sy-vline 
WA_ALMTMSCFIL_STR-MTCLASS sy-vline 
WA_ALMTMSCFIL_STR-SETNAME sy-vline 
WA_ALMTMSCFIL_STR-LINENUMBER sy-vline 
WA_ALMTMSCFIL_STR-MTINDEX sy-vline 
WA_ALMTMSCFIL_STR-EXTINDEX sy-vline 
WA_ALMTMSCFIL_STR-OBJECTNAME sy-vline 
WA_ALMTMSCFIL_STR-MTNAMESHRT sy-vline 
WA_ALMTMSCFIL_STR-FROMSGCLAS sy-vline 
WA_ALMTMSCFIL_STR-FROMSGID sy-vline 
WA_ALMTMSCFIL_STR-TOMSGCLAS sy-vline 
WA_ALMTMSCFIL_STR-TOMSGID sy-vline 
WA_ALMTMSCFIL_STR-MSGVALUE sy-vline 
WA_ALMTMSCFIL_STR-SEVERITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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