ABAP Select data from SAP table CMGENGYACCDET into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMGENGYACCDET
*  INTO TABLE @DATA(IT_CMGENGYACCDET2).
*--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_CMGENGYACCDET INDEX 1 INTO DATA(WA_CMGENGYACCDET2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMGENGYACCDET>-MANDT = 1.
<CMGENGYACCDET>-MICROGENBUSINESSPARTNER = 1.
<CMGENGYACCDET>-MICROGENCONTRACTACCOUNT = 1.
<CMGENGYACCDET>-MICROGENCONTRACT = 1.
<CMGENGYACCDET>-MICROGENINSTALLATION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMGENGYACCDET-MICROGENBILLPERIODVALUE, sy-vline,
  WA_CMGENGYACCDET-MICROGENTOU, sy-vline,
  WA_CMGENGYACCDET-MICROGENENERGYTYPE, sy-vline,
  WA_CMGENGYACCDET-MICROGENTRANSACTIONNUMBER, sy-vline,
  WA_CMGENGYACCDET-MICROGENENERGYTYPEDESC, sy-vline,
  WA_CMGENGYACCDET-MICROGENTOUTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMGENGYACCDET 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_CMGENGYACCDET 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_CMGENGYACCDET INTO WA_CMGENGYACCDET.


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

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

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

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

*Conversion exit CUNIT, internal->external for field MICROGENENERGYCREDITSUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CMGENGYACCDET-MICROGENENERGYCREDITSUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMGENGYACCDET-MICROGENENERGYCREDITSUNIT.
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_CMGENGYACCDET_STR, 
MANDT TYPE STRING,
MICROGENBUSINESSPARTNER TYPE STRING,
MICROGENCONTRACTACCOUNT TYPE STRING,
MICROGENCONTRACT TYPE STRING,
MICROGENINSTALLATION TYPE STRING,
MICROGENBILLPERIODVALUE TYPE STRING,
MICROGENTOU TYPE STRING,
MICROGENENERGYTYPE TYPE STRING,
MICROGENTRANSACTIONNUMBER TYPE STRING,
MICROGENENERGYTYPEDESC TYPE STRING,
MICROGENTOUTEXT TYPE STRING,
MICROGENENERGYCREDITSQUANTITY TYPE STRING,
MICROGENENERGYCREDITSUNIT TYPE STRING,
MICROGENBILLPERIODSTARTDATE TYPE STRING,
MICROGENBILLPERIODENDDATE TYPE STRING,
MICROGENBUSINESSPARTNERNAME TYPE STRING,
CRITICALITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMGENGYACCDET_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_CMGENGYACCDET_STR-MANDT sy-vline 
WA_CMGENGYACCDET_STR-MICROGENBUSINESSPARTNER sy-vline 
WA_CMGENGYACCDET_STR-MICROGENCONTRACTACCOUNT sy-vline 
WA_CMGENGYACCDET_STR-MICROGENCONTRACT sy-vline 
WA_CMGENGYACCDET_STR-MICROGENINSTALLATION sy-vline 
WA_CMGENGYACCDET_STR-MICROGENBILLPERIODVALUE sy-vline 
WA_CMGENGYACCDET_STR-MICROGENTOU sy-vline 
WA_CMGENGYACCDET_STR-MICROGENENERGYTYPE sy-vline 
WA_CMGENGYACCDET_STR-MICROGENTRANSACTIONNUMBER sy-vline 
WA_CMGENGYACCDET_STR-MICROGENENERGYTYPEDESC sy-vline 
WA_CMGENGYACCDET_STR-MICROGENTOUTEXT sy-vline 
WA_CMGENGYACCDET_STR-MICROGENENERGYCREDITSQUANTITY sy-vline 
WA_CMGENGYACCDET_STR-MICROGENENERGYCREDITSUNIT sy-vline 
WA_CMGENGYACCDET_STR-MICROGENBILLPERIODSTARTDATE sy-vline 
WA_CMGENGYACCDET_STR-MICROGENBILLPERIODENDDATE sy-vline 
WA_CMGENGYACCDET_STR-MICROGENBUSINESSPARTNERNAME sy-vline 
WA_CMGENGYACCDET_STR-CRITICALITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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