ABAP Select data from SAP table VITMRH_TAB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VITMRH_TAB
*  INTO TABLE @DATA(IT_VITMRH_TAB2).
*--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_VITMRH_TAB INDEX 1 INTO DATA(WA_VITMRH_TAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VITMRH_TAB>-VALIDTO = 1.
<VITMRH_TAB>-FREQUENCY = 1.
<VITMRH_TAB>-FREQUENCYUNIT = 1.
<VITMRH_TAB>-WEEKFROM = 1.
<VITMRH_TAB>-MONTHFROM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VITMRH_TAB-CONDVALUEREFER, sy-vline,
  WA_VITMRH_TAB-CONDVALUEREFDIF, sy-vline,
  WA_VITMRH_TAB-PRORATE, sy-vline,
  WA_VITMRH_TAB-CALCMETHPER, sy-vline,
  WA_VITMRH_TAB-PAYMENTFORMRH, sy-vline,
  WA_VITMRH_TAB-RHYTHMBEGIN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VITMRH_TAB 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_VITMRH_TAB 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_VITMRH_TAB INTO WA_VITMRH_TAB.


*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 REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_VITMRH_TAB-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VITMRH_TAB-VALIDTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FIXPER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VITMRH_TAB-FIXPER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VITMRH_TAB-FIXPER.
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_VITMRH_TAB_STR, 
VALIDTO TYPE STRING,
FREQUENCY TYPE STRING,
FREQUENCYUNIT TYPE STRING,
WEEKFROM TYPE STRING,
MONTHFROM TYPE STRING,
CONDVALUEREFER TYPE STRING,
CONDVALUEREFDIF TYPE STRING,
PRORATE TYPE STRING,
CALCMETHPER TYPE STRING,
PAYMENTFORMRH TYPE STRING,
RHYTHMBEGIN TYPE STRING,
DUEDATECORRRULE TYPE STRING,
DUEDATECORRDAY TYPE STRING,
DUEDATECORRMONTH TYPE STRING,
DUEDATECORRYEAR TYPE STRING,
DUEDATECORRCAL TYPE STRING,
DUEDATECORRCALUN TYPE STRING,
DUEDATECALENDER TYPE STRING,
DUEDATEMOVEBEGIN TYPE STRING,
DUEDATEMOVEEND TYPE STRING,
FIXPER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VITMRH_TAB_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_VITMRH_TAB_STR-VALIDTO sy-vline 
WA_VITMRH_TAB_STR-FREQUENCY sy-vline 
WA_VITMRH_TAB_STR-FREQUENCYUNIT sy-vline 
WA_VITMRH_TAB_STR-WEEKFROM sy-vline 
WA_VITMRH_TAB_STR-MONTHFROM sy-vline 
WA_VITMRH_TAB_STR-CONDVALUEREFER sy-vline 
WA_VITMRH_TAB_STR-CONDVALUEREFDIF sy-vline 
WA_VITMRH_TAB_STR-PRORATE sy-vline 
WA_VITMRH_TAB_STR-CALCMETHPER sy-vline 
WA_VITMRH_TAB_STR-PAYMENTFORMRH sy-vline 
WA_VITMRH_TAB_STR-RHYTHMBEGIN sy-vline 
WA_VITMRH_TAB_STR-DUEDATECORRRULE sy-vline 
WA_VITMRH_TAB_STR-DUEDATECORRDAY sy-vline 
WA_VITMRH_TAB_STR-DUEDATECORRMONTH sy-vline 
WA_VITMRH_TAB_STR-DUEDATECORRYEAR sy-vline 
WA_VITMRH_TAB_STR-DUEDATECORRCAL sy-vline 
WA_VITMRH_TAB_STR-DUEDATECORRCALUN sy-vline 
WA_VITMRH_TAB_STR-DUEDATECALENDER sy-vline 
WA_VITMRH_TAB_STR-DUEDATEMOVEBEGIN sy-vline 
WA_VITMRH_TAB_STR-DUEDATEMOVEEND sy-vline 
WA_VITMRH_TAB_STR-FIXPER sy-vline      INTO ld_text SEPARATED BY SPACE.

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