ABAP Select data from SAP table TMTR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TMTR
*  INTO TABLE @DATA(IT_TMTR2).
*--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_TMTR INDEX 1 INTO DATA(WA_TMTR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TMTR>-MANDT = 1.
<TMTR>-TRANSFER_EVENT = 1.
<TMTR>-TRANSFER_GROUP = 1.
<TMTR>-RULE_NUMBER = 1.
<TMTR>-SOURCE_STRUCTURE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TMTR-SOURCE_FIELD, sy-vline,
  WA_TMTR-TARGET_STRUCTURE, sy-vline,
  WA_TMTR-TARGET_FIELD, sy-vline,
  WA_TMTR-FIXED_VALUE, sy-vline,
  WA_TMTR-COPY_REQ, sy-vline,
  WA_TMTR-COPY_MODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TMTR 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_TMTR 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_TMTR INTO WA_TMTR.


*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 BFUID, internal->external for field BRF_FUNC_ID
CALL FUNCTION 'CONVERSION_EXIT_BFUID_OUTPUT'
  EXPORTING
    input =                      WA_TMTR-BRF_FUNC_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TMTR-BRF_FUNC_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PARVW, internal->external for field PARVW
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_TMTR-PARVW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TMTR-PARVW.
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_TMTR_STR, 
MANDT TYPE STRING,
TRANSFER_EVENT TYPE STRING,
TRANSFER_GROUP TYPE STRING,
RULE_NUMBER TYPE STRING,
SOURCE_STRUCTURE TYPE STRING,
SOURCE_FIELD TYPE STRING,
TARGET_STRUCTURE TYPE STRING,
TARGET_FIELD TYPE STRING,
FIXED_VALUE TYPE STRING,
COPY_REQ TYPE STRING,
COPY_MODE TYPE STRING,
OFFSET_SOURCE TYPE STRING,
LENGTH_SOURCE TYPE STRING,
SOURCE_VAL_CLASS TYPE STRING,
REQUIREMNT_CLASS TYPE STRING,
TEXT TYPE STRING,
BRF_FUNC_ID TYPE STRING,
OFFSET_TARGET TYPE STRING,
LENGTH_TARGET TYPE STRING,
PARVW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TMTR_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_TMTR_STR-MANDT sy-vline 
WA_TMTR_STR-TRANSFER_EVENT sy-vline 
WA_TMTR_STR-TRANSFER_GROUP sy-vline 
WA_TMTR_STR-RULE_NUMBER sy-vline 
WA_TMTR_STR-SOURCE_STRUCTURE sy-vline 
WA_TMTR_STR-SOURCE_FIELD sy-vline 
WA_TMTR_STR-TARGET_STRUCTURE sy-vline 
WA_TMTR_STR-TARGET_FIELD sy-vline 
WA_TMTR_STR-FIXED_VALUE sy-vline 
WA_TMTR_STR-COPY_REQ sy-vline 
WA_TMTR_STR-COPY_MODE sy-vline 
WA_TMTR_STR-OFFSET_SOURCE sy-vline 
WA_TMTR_STR-LENGTH_SOURCE sy-vline 
WA_TMTR_STR-SOURCE_VAL_CLASS sy-vline 
WA_TMTR_STR-REQUIREMNT_CLASS sy-vline 
WA_TMTR_STR-TEXT sy-vline 
WA_TMTR_STR-BRF_FUNC_ID sy-vline 
WA_TMTR_STR-OFFSET_TARGET sy-vline 
WA_TMTR_STR-LENGTH_TARGET sy-vline 
WA_TMTR_STR-PARVW sy-vline      INTO ld_text SEPARATED BY SPACE.

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