ABAP Select data from SAP table TMIVRG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TMIVRG
*  INTO TABLE @DATA(IT_TMIVRG2).
*--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_TMIVRG INDEX 1 INTO DATA(WA_TMIVRG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TMIVRG>-MANDT = 1.
<TMIVRG>-RRLCG = 1.
<TMIVRG>-IVGROUP = 1.
<TMIVRG>-ICON = 1.
<TMIVRG>-ACTIVATION_CHECK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TMIVRG-AUTO_ACTIVE, sy-vline,
  WA_TMIVRG-FOLLOWUP_DOCUMT, sy-vline,
  WA_TMIVRG-COMPRESS_DIFF, sy-vline,
  WA_TMIVRG-WRART, sy-vline,
  WA_TMIVRG-CHANGE_SIGN, sy-vline,
  WA_TMIVRG-RL_VALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TMIVRG 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_TMIVRG 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_TMIVRG INTO WA_TMIVRG.


*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 ALPHA, internal->external for field RRLCG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TMIVRG-RRLCG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TMIVRG-RRLCG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field IVGROUP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TMIVRG-IVGROUP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TMIVRG-IVGROUP.
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_TMIVRG_STR, 
MANDT TYPE STRING,
RRLCG TYPE STRING,
IVGROUP TYPE STRING,
ICON TYPE STRING,
ACTIVATION_CHECK TYPE STRING,
AUTO_ACTIVE TYPE STRING,
FOLLOWUP_DOCUMT TYPE STRING,
COMPRESS_DIFF TYPE STRING,
WRART TYPE STRING,
CHANGE_SIGN TYPE STRING,
RL_VALUE TYPE STRING,
CANCEL_ALLOWED TYPE STRING,
WITH_ITEM TYPE STRING,
WDTYP_IV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TMIVRG_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_TMIVRG_STR-MANDT sy-vline 
WA_TMIVRG_STR-RRLCG sy-vline 
WA_TMIVRG_STR-IVGROUP sy-vline 
WA_TMIVRG_STR-ICON sy-vline 
WA_TMIVRG_STR-ACTIVATION_CHECK sy-vline 
WA_TMIVRG_STR-AUTO_ACTIVE sy-vline 
WA_TMIVRG_STR-FOLLOWUP_DOCUMT sy-vline 
WA_TMIVRG_STR-COMPRESS_DIFF sy-vline 
WA_TMIVRG_STR-WRART sy-vline 
WA_TMIVRG_STR-CHANGE_SIGN sy-vline 
WA_TMIVRG_STR-RL_VALUE sy-vline 
WA_TMIVRG_STR-CANCEL_ALLOWED sy-vline 
WA_TMIVRG_STR-WITH_ITEM sy-vline 
WA_TMIVRG_STR-WDTYP_IV sy-vline      INTO ld_text SEPARATED BY SPACE.

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