ABAP Select data from SAP table /STMC/TM_SYS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /STMC/TM_SYS 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 /STMC/TM_SYS. 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 /STMC/TM_SYS 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_/STMC/TM_SYS TYPE STANDARD TABLE OF /STMC/TM_SYS,
      WA_/STMC/TM_SYS TYPE /STMC/TM_SYS,
      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: </STMC/TM_SYS> TYPE /STMC/TM_SYS.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /STMC/TM_SYS
  INTO TABLE IT_/STMC/TM_SYS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /STMC/TM_SYS
*  INTO TABLE @DATA(IT_/STMC/TM_SYS2).
*--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_/STMC/TM_SYS INDEX 1 INTO DATA(WA_/STMC/TM_SYS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/STMC/TM_SYS ASSIGNING </STMC/TM_SYS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</STMC/TM_SYS>-TM_SYS_ID = 1.
</STMC/TM_SYS>-DOCR_VALID_TO = 1.
</STMC/TM_SYS>-DOCR_VALID_FROM = 1.
</STMC/TM_SYS>-TM_SYS_TYPE = 1.
</STMC/TM_SYS>-TM_SYS_SUBTYPE = 1.

ENDLOOP.

LOOP AT IT_/STMC/TM_SYS INTO WA_/STMC/TM_SYS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/STMC/TM_SYS-TM_TECHNICAL_ID, sy-vline,
  WA_/STMC/TM_SYS-TM_SYS_RELEASE, sy-vline,
  WA_/STMC/TM_SYS-TM_DC_RELEASE, sy-vline,
  WA_/STMC/TM_SYS-TM_SYS_HASH, sy-vline,
  WA_/STMC/TM_SYS-TM_ENV_HASH, sy-vline,
  WA_/STMC/TM_SYS-TM_AUTH_GROUP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/STMC/TM_SYS 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_/STMC/TM_SYS 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_/STMC/TM_SYS INTO WA_/STMC/TM_SYS.


*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_/STMC/TM_SYS_STR, 
TM_SYS_ID TYPE STRING,
DOCR_VALID_TO TYPE STRING,
DOCR_VALID_FROM TYPE STRING,
TM_SYS_TYPE TYPE STRING,
TM_SYS_SUBTYPE TYPE STRING,
TM_TECHNICAL_ID TYPE STRING,
TM_SYS_RELEASE TYPE STRING,
TM_DC_RELEASE TYPE STRING,
TM_SYS_HASH TYPE STRING,
TM_ENV_HASH TYPE STRING,
TM_AUTH_GROUP TYPE STRING,
CHK_STATUS TYPE STRING,
WORK_MODE TYPE STRING,
USAGE_MODE TYPE STRING,
TIME_ZONE TYPE STRING,
SYNC_MODE TYPE STRING,
SYNC_LAST_AT TYPE STRING,
SYNC_NEXT_AT TYPE STRING,
SYNC_SYS_HASH TYPE STRING,
SYNC_ENV_HASH TYPE STRING,
DOCR_LABEL_ID TYPE STRING,
DOCR_LABEL_SHORT TYPE STRING,
DOCR_LABEL_LONG TYPE STRING,
DOCR_DOC_ID TYPE STRING,
DOCR_CHANGED_AT TYPE STRING,
DOCR_CHANGED_BY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/STMC/TM_SYS_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_/STMC/TM_SYS_STR-TM_SYS_ID sy-vline 
WA_/STMC/TM_SYS_STR-DOCR_VALID_TO sy-vline 
WA_/STMC/TM_SYS_STR-DOCR_VALID_FROM sy-vline 
WA_/STMC/TM_SYS_STR-TM_SYS_TYPE sy-vline 
WA_/STMC/TM_SYS_STR-TM_SYS_SUBTYPE sy-vline 
WA_/STMC/TM_SYS_STR-TM_TECHNICAL_ID sy-vline 
WA_/STMC/TM_SYS_STR-TM_SYS_RELEASE sy-vline 
WA_/STMC/TM_SYS_STR-TM_DC_RELEASE sy-vline 
WA_/STMC/TM_SYS_STR-TM_SYS_HASH sy-vline 
WA_/STMC/TM_SYS_STR-TM_ENV_HASH sy-vline 
WA_/STMC/TM_SYS_STR-TM_AUTH_GROUP sy-vline 
WA_/STMC/TM_SYS_STR-CHK_STATUS sy-vline 
WA_/STMC/TM_SYS_STR-WORK_MODE sy-vline 
WA_/STMC/TM_SYS_STR-USAGE_MODE sy-vline 
WA_/STMC/TM_SYS_STR-TIME_ZONE sy-vline 
WA_/STMC/TM_SYS_STR-SYNC_MODE sy-vline 
WA_/STMC/TM_SYS_STR-SYNC_LAST_AT sy-vline 
WA_/STMC/TM_SYS_STR-SYNC_NEXT_AT sy-vline 
WA_/STMC/TM_SYS_STR-SYNC_SYS_HASH sy-vline 
WA_/STMC/TM_SYS_STR-SYNC_ENV_HASH sy-vline 
WA_/STMC/TM_SYS_STR-DOCR_LABEL_ID sy-vline 
WA_/STMC/TM_SYS_STR-DOCR_LABEL_SHORT sy-vline 
WA_/STMC/TM_SYS_STR-DOCR_LABEL_LONG sy-vline 
WA_/STMC/TM_SYS_STR-DOCR_DOC_ID sy-vline 
WA_/STMC/TM_SYS_STR-DOCR_CHANGED_AT sy-vline 
WA_/STMC/TM_SYS_STR-DOCR_CHANGED_BY sy-vline      INTO ld_text SEPARATED BY SPACE.

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