ABAP Select data from SAP table RFCDISPLAZ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFCDISPLAZ
*  INTO TABLE @DATA(IT_RFCDISPLAZ2).
*--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_RFCDISPLAZ INDEX 1 INTO DATA(WA_RFCDISPLAZ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFCDISPLAZ>-RFCLBFLAG = 1.
<RFCDISPLAZ>-RFCLOAD = 1.
<RFCDISPLAZ>-RFCREGID = 1.
<RFCDISPLAZ>-ARFCAKTIV0 = 1.
<RFCDISPLAZ>-ARFCAKTIV1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFCDISPLAZ-ARFCMETHD0, sy-vline,
  WA_RFCDISPLAZ-ARFCMETHD1, sy-vline,
  WA_RFCDISPLAZ-RFCSLOGIN, sy-vline,
  WA_RFCDISPLAZ-RFCSLOGIN0, sy-vline,
  WA_RFCDISPLAZ-RFCSLOGIN1, sy-vline,
  WA_RFCDISPLAZ-RFCSLOGIN2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFCDISPLAZ 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_RFCDISPLAZ 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_RFCDISPLAZ INTO WA_RFCDISPLAZ.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RFCDISPLAZ_STR, 
RFCLBFLAG TYPE STRING,
RFCLOAD TYPE STRING,
RFCREGID TYPE STRING,
ARFCAKTIV0 TYPE STRING,
ARFCAKTIV1 TYPE STRING,
ARFCMETHD0 TYPE STRING,
ARFCMETHD1 TYPE STRING,
RFCSLOGIN TYPE STRING,
RFCSLOGIN0 TYPE STRING,
RFCSLOGIN1 TYPE STRING,
RFCSLOGIN2 TYPE STRING,
RFCSLOGIN3 TYPE STRING,
RFCSAMEUSR TYPE STRING,
RFCTCODCHK TYPE STRING,
RFCSNCTXT TYPE STRING,
RFCSNC0 TYPE STRING,
RFCSNC1 TYPE STRING,
SAVEHOST TYPE STRING,
SAVEIP TYPE STRING,
IPORHOST TYPE STRING,
RFCSLOGIN4 TYPE STRING,
RFCSLOGIN5 TYPE STRING,
BASXML_INACTIVE TYPE STRING,
BASXML_DEFAULT TYPE STRING,
BASXML_ACTIVE TYPE STRING,
ASSERTION_TICKET TYPE STRING,
ASSERTION_CLIENT TYPE STRING,
ASSERTION_SYSID TYPE STRING,
LOGON_TICKET TYPE STRING,
NO_TICKET TYPE STRING,
HTTP_EXT_USER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFCDISPLAZ_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_RFCDISPLAZ_STR-RFCLBFLAG sy-vline 
WA_RFCDISPLAZ_STR-RFCLOAD sy-vline 
WA_RFCDISPLAZ_STR-RFCREGID sy-vline 
WA_RFCDISPLAZ_STR-ARFCAKTIV0 sy-vline 
WA_RFCDISPLAZ_STR-ARFCAKTIV1 sy-vline 
WA_RFCDISPLAZ_STR-ARFCMETHD0 sy-vline 
WA_RFCDISPLAZ_STR-ARFCMETHD1 sy-vline 
WA_RFCDISPLAZ_STR-RFCSLOGIN sy-vline 
WA_RFCDISPLAZ_STR-RFCSLOGIN0 sy-vline 
WA_RFCDISPLAZ_STR-RFCSLOGIN1 sy-vline 
WA_RFCDISPLAZ_STR-RFCSLOGIN2 sy-vline 
WA_RFCDISPLAZ_STR-RFCSLOGIN3 sy-vline 
WA_RFCDISPLAZ_STR-RFCSAMEUSR sy-vline 
WA_RFCDISPLAZ_STR-RFCTCODCHK sy-vline 
WA_RFCDISPLAZ_STR-RFCSNCTXT sy-vline 
WA_RFCDISPLAZ_STR-RFCSNC0 sy-vline 
WA_RFCDISPLAZ_STR-RFCSNC1 sy-vline 
WA_RFCDISPLAZ_STR-SAVEHOST sy-vline 
WA_RFCDISPLAZ_STR-SAVEIP sy-vline 
WA_RFCDISPLAZ_STR-IPORHOST sy-vline 
WA_RFCDISPLAZ_STR-RFCSLOGIN4 sy-vline 
WA_RFCDISPLAZ_STR-RFCSLOGIN5 sy-vline 
WA_RFCDISPLAZ_STR-BASXML_INACTIVE sy-vline 
WA_RFCDISPLAZ_STR-BASXML_DEFAULT sy-vline 
WA_RFCDISPLAZ_STR-BASXML_ACTIVE sy-vline 
WA_RFCDISPLAZ_STR-ASSERTION_TICKET sy-vline 
WA_RFCDISPLAZ_STR-ASSERTION_CLIENT sy-vline 
WA_RFCDISPLAZ_STR-ASSERTION_SYSID sy-vline 
WA_RFCDISPLAZ_STR-LOGON_TICKET sy-vline 
WA_RFCDISPLAZ_STR-NO_TICKET sy-vline 
WA_RFCDISPLAZ_STR-HTTP_EXT_USER sy-vline      INTO ld_text SEPARATED BY SPACE.

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