ABAP Select data from SAP table IEMTRRDNGUNITRCT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IEMTRRDNGUNITRCT
*  INTO TABLE @DATA(IT_IEMTRRDNGUNITRCT2).
*--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_IEMTRRDNGUNITRCT INDEX 1 INTO DATA(WA_IEMTRRDNGUNITRCT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IEMTRRDNGUNITRCT>-MANDT = 1.
<IEMTRRDNGUNITRCT>-UTILITIESINSTALLATION = 1.
<IEMTRRDNGUNITRCT>-UTILITIESLOGICALREGISTERNUMBER = 1.
<IEMTRRDNGUNITRCT>-SCHEDULEDMETERREADINGDATE = 1.
<IEMTRRDNGUNITRCT>-SCHEDULEDUTILITIESBILLINGDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IEMTRRDNGUNITRCT-METERREADINGREASON, sy-vline,
  WA_IEMTRRDNGUNITRCT-METERREADINGUNIT, sy-vline,
  WA_IEMTRRDNGUNITRCT-METERREADINGSTATUSGROUP, sy-vline,
  WA_IEMTRRDNGUNITRCT-COUNTFORMETERREADINGMISGORDS, sy-vline,
  WA_IEMTRRDNGUNITRCT-COUNTFORMETERREADINGDOCUMENTS, sy-vline,
  WA_IEMTRRDNGUNITRCT-UTILSBILLGBLOCKREASON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IEMTRRDNGUNITRCT 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_IEMTRRDNGUNITRCT 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_IEMTRRDNGUNITRCT INTO WA_IEMTRRDNGUNITRCT.


*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 UTILITIESINSTALLATION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IEMTRRDNGUNITRCT-UTILITIESINSTALLATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEMTRRDNGUNITRCT-UTILITIESINSTALLATION.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field METERREADINGDOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IEMTRRDNGUNITRCT-METERREADINGDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEMTRRDNGUNITRCT-METERREADINGDOCUMENT.
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_IEMTRRDNGUNITRCT_STR, 
MANDT TYPE STRING,
UTILITIESINSTALLATION TYPE STRING,
UTILITIESLOGICALREGISTERNUMBER TYPE STRING,
SCHEDULEDMETERREADINGDATE TYPE STRING,
SCHEDULEDUTILITIESBILLINGDATE TYPE STRING,
METERREADINGREASON TYPE STRING,
METERREADINGUNIT TYPE STRING,
METERREADINGSTATUSGROUP TYPE STRING,
COUNTFORMETERREADINGMISGORDS TYPE STRING,
COUNTFORMETERREADINGDOCUMENTS TYPE STRING,
UTILSBILLGBLOCKREASON TYPE STRING,
NMBROFMETERREADINGMISSINGORDS TYPE STRING,
NUMBEROFMETERREADINGDOCUMENTS TYPE STRING,
UTILITIESREGISTER TYPE STRING,
UTILITIESRATECATEGORY TYPE STRING,
UTILITIESPORTION TYPE STRING,
METERREADINGDOCUMENT TYPE STRING,
UTILITIESBILLINGCLASS TYPE STRING,
DIVISION TYPE STRING,
AUTHORIZATIONGROUP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IEMTRRDNGUNITRCT_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_IEMTRRDNGUNITRCT_STR-MANDT sy-vline 
WA_IEMTRRDNGUNITRCT_STR-UTILITIESINSTALLATION sy-vline 
WA_IEMTRRDNGUNITRCT_STR-UTILITIESLOGICALREGISTERNUMBER sy-vline 
WA_IEMTRRDNGUNITRCT_STR-SCHEDULEDMETERREADINGDATE sy-vline 
WA_IEMTRRDNGUNITRCT_STR-SCHEDULEDUTILITIESBILLINGDATE sy-vline 
WA_IEMTRRDNGUNITRCT_STR-METERREADINGREASON sy-vline 
WA_IEMTRRDNGUNITRCT_STR-METERREADINGUNIT sy-vline 
WA_IEMTRRDNGUNITRCT_STR-METERREADINGSTATUSGROUP sy-vline 
WA_IEMTRRDNGUNITRCT_STR-COUNTFORMETERREADINGMISGORDS sy-vline 
WA_IEMTRRDNGUNITRCT_STR-COUNTFORMETERREADINGDOCUMENTS sy-vline 
WA_IEMTRRDNGUNITRCT_STR-UTILSBILLGBLOCKREASON sy-vline 
WA_IEMTRRDNGUNITRCT_STR-NMBROFMETERREADINGMISSINGORDS sy-vline 
WA_IEMTRRDNGUNITRCT_STR-NUMBEROFMETERREADINGDOCUMENTS sy-vline 
WA_IEMTRRDNGUNITRCT_STR-UTILITIESREGISTER sy-vline 
WA_IEMTRRDNGUNITRCT_STR-UTILITIESRATECATEGORY sy-vline 
WA_IEMTRRDNGUNITRCT_STR-UTILITIESPORTION sy-vline 
WA_IEMTRRDNGUNITRCT_STR-METERREADINGDOCUMENT sy-vline 
WA_IEMTRRDNGUNITRCT_STR-UTILITIESBILLINGCLASS sy-vline 
WA_IEMTRRDNGUNITRCT_STR-DIVISION sy-vline 
WA_IEMTRRDNGUNITRCT_STR-AUTHORIZATIONGROUP sy-vline      INTO ld_text SEPARATED BY SPACE.

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