ABAP Select data from SAP table TRMCOM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRMCOM
*  INTO TABLE @DATA(IT_TRMCOM2).
*--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_TRMCOM INDEX 1 INTO DATA(WA_TRMCOM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRMCOM>-SLANGUAGE = 1.
<TRMCOM>-TLANGUAGE = 1.
<TRMCOM>-SHASH = 1.
<TRMCOM>-STABID = 1.
<TRMCOM>-SHASHCNFL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRMCOM-THASH, sy-vline,
  WA_TRMCOM-TTABID, sy-vline,
  WA_TRMCOM-THASHCNFL, sy-vline,
  WA_TRMCOM-APPLIC, sy-vline,
  WA_TRMCOM-NR, sy-vline,
  WA_TRMCOM-TEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRMCOM 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_TRMCOM 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_TRMCOM INTO WA_TRMCOM.


*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.

*Conversion exit ISOLA, internal->external for field SLANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_TRMCOM-SLANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRMCOM-SLANGUAGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field TLANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_TRMCOM-TLANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRMCOM-TLANGUAGE.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_TRMCOM_STR, 
SLANGUAGE TYPE STRING,
TLANGUAGE TYPE STRING,
SHASH TYPE STRING,
STABID TYPE STRING,
SHASHCNFL TYPE STRING,
THASH TYPE STRING,
TTABID TYPE STRING,
THASHCNFL TYPE STRING,
APPLIC TYPE STRING,
NR TYPE STRING,
TEXT TYPE STRING,
UNAME TYPE STRING,
IDATE TYPE STRING,
ITIME TYPE STRING,
NOT_VALID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRMCOM_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_TRMCOM_STR-SLANGUAGE sy-vline 
WA_TRMCOM_STR-TLANGUAGE sy-vline 
WA_TRMCOM_STR-SHASH sy-vline 
WA_TRMCOM_STR-STABID sy-vline 
WA_TRMCOM_STR-SHASHCNFL sy-vline 
WA_TRMCOM_STR-THASH sy-vline 
WA_TRMCOM_STR-TTABID sy-vline 
WA_TRMCOM_STR-THASHCNFL sy-vline 
WA_TRMCOM_STR-APPLIC sy-vline 
WA_TRMCOM_STR-NR sy-vline 
WA_TRMCOM_STR-TEXT sy-vline 
WA_TRMCOM_STR-UNAME sy-vline 
WA_TRMCOM_STR-IDATE sy-vline 
WA_TRMCOM_STR-ITIME sy-vline 
WA_TRMCOM_STR-NOT_VALID sy-vline      INTO ld_text SEPARATED BY SPACE.

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