ABAP Select data from SAP table RFM_EPC_MEMORY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFM_EPC_MEMORY
*  INTO TABLE @DATA(IT_RFM_EPC_MEMORY2).
*--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_RFM_EPC_MEMORY INDEX 1 INTO DATA(WA_RFM_EPC_MEMORY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFM_EPC_MEMORY>-CLIENT = 1.
<RFM_EPC_MEMORY>-GLOBALTRADEITEMNUMBER = 1.
<RFM_EPC_MEMORY>-SERIALNUMBER = 1.
<RFM_EPC_MEMORY>-COMPANYPREFIXLENGTH = 1.
<RFM_EPC_MEMORY>-SITE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFM_EPC_MEMORY-STORAGELOCATION, sy-vline,
  WA_RFM_EPC_MEMORY-FIRSTSEENINSITEDATETIME, sy-vline,
  WA_RFM_EPC_MEMORY-LASTSEENINSITEDATETIME, sy-vline,
  WA_RFM_EPC_MEMORY-LASTEVENT, sy-vline,
  WA_RFM_EPC_MEMORY-STATUS, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_RFM_EPC_MEMORY 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_RFM_EPC_MEMORY 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_RFM_EPC_MEMORY INTO WA_RFM_EPC_MEMORY.


*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 EAN11, internal->external for field GLOBALTRADEITEMNUMBER
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_RFM_EPC_MEMORY-GLOBALTRADEITEMNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFM_EPC_MEMORY-GLOBALTRADEITEMNUMBER.
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_RFM_EPC_MEMORY_STR, 
CLIENT TYPE STRING,
GLOBALTRADEITEMNUMBER TYPE STRING,
SERIALNUMBER TYPE STRING,
COMPANYPREFIXLENGTH TYPE STRING,
SITE TYPE STRING,
STORAGELOCATION TYPE STRING,
FIRSTSEENINSITEDATETIME TYPE STRING,
LASTSEENINSITEDATETIME TYPE STRING,
LASTEVENT TYPE STRING,
STATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFM_EPC_MEMORY_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_RFM_EPC_MEMORY_STR-CLIENT sy-vline 
WA_RFM_EPC_MEMORY_STR-GLOBALTRADEITEMNUMBER sy-vline 
WA_RFM_EPC_MEMORY_STR-SERIALNUMBER sy-vline 
WA_RFM_EPC_MEMORY_STR-COMPANYPREFIXLENGTH sy-vline 
WA_RFM_EPC_MEMORY_STR-SITE sy-vline 
WA_RFM_EPC_MEMORY_STR-STORAGELOCATION sy-vline 
WA_RFM_EPC_MEMORY_STR-FIRSTSEENINSITEDATETIME sy-vline 
WA_RFM_EPC_MEMORY_STR-LASTSEENINSITEDATETIME sy-vline 
WA_RFM_EPC_MEMORY_STR-LASTEVENT sy-vline 
WA_RFM_EPC_MEMORY_STR-STATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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