ABAP Select data from SAP table DB4ST4RFC into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB4ST4RFC 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 DB4ST4RFC. 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 DB4ST4RFC 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_DB4ST4RFC TYPE STANDARD TABLE OF DB4ST4RFC,
      WA_DB4ST4RFC TYPE DB4ST4RFC,
      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: <DB4ST4RFC> TYPE DB4ST4RFC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB4ST4RFC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB4ST4RFC
  INTO TABLE IT_DB4ST4RFC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB4ST4RFC
*  INTO TABLE @DATA(IT_DB4ST4RFC2).
*--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_DB4ST4RFC INDEX 1 INTO DATA(WA_DB4ST4RFC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB4ST4RFC ASSIGNING <DB4ST4RFC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB4ST4RFC>-SYSID = 1.
<DB4ST4RFC>-DBSYS = 1.
<DB4ST4RFC>-SAPREL = 1.
<DB4ST4RFC>-DBREL = 1.
<DB4ST4RFC>-RFCDEST = 1.

ENDLOOP.

LOOP AT IT_DB4ST4RFC INTO WA_DB4ST4RFC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB4ST4RFC-DBHOST, sy-vline,
  WA_DB4ST4RFC-DBCNAME, sy-vline,
  WA_DB4ST4RFC-QQDMPTIME, sy-vline,
  WA_DB4ST4RFC-QQSUMCNT, sy-vline,
  WA_DB4ST4RFC-QQCOMCNT, sy-vline,
  WA_DB4ST4RFC-QQRBKCNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB4ST4RFC 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_DB4ST4RFC 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_DB4ST4RFC INTO WA_DB4ST4RFC.


*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_DB4ST4RFC_STR, 
SYSID TYPE STRING,
DBSYS TYPE STRING,
SAPREL TYPE STRING,
DBREL TYPE STRING,
RFCDEST TYPE STRING,
DBHOST TYPE STRING,
DBCNAME TYPE STRING,
QQDMPTIME TYPE STRING,
QQSUMCNT TYPE STRING,
QQCOMCNT TYPE STRING,
QQRBKCNT TYPE STRING,
QQSELCNT TYPE STRING,
QQINSCNT TYPE STRING,
QQUPDCNT TYPE STRING,
QQDELCNT TYPE STRING,
QQDDLCNT TYPE STRING,
QQOTHCNT TYPE STRING,
QQTSCCNT TYPE STRING,
QQTSCTOTR TYPE STRING,
QQTSCTTIME TYPE STRING,
QQSRTCNT TYPE STRING,
QQSRTTOTR TYPE STRING,
QQSRTTTIME TYPE STRING,
QQIDCCNT TYPE STRING,
QQIDCTTIME TYPE STRING,
QQTMFCNT TYPE STRING,
QQTMFTTIME TYPE STRING,
QQIDACNT TYPE STRING,
QQIDATBCNT TYPE STRING,
QQIDAQRYCT TYPE STRING,
QQODFTIME TYPE STRING,
QQTOTAVGT TYPE STRING,
QQTOTTIME TYPE STRING,
PHYSREAD TYPE STRING,
LOGICREAD TYPE STRING,
QUALITY TYPE STRING,
READPCALL TYPE STRING,
TIMEPCALL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB4ST4RFC_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_DB4ST4RFC_STR-SYSID sy-vline 
WA_DB4ST4RFC_STR-DBSYS sy-vline 
WA_DB4ST4RFC_STR-SAPREL sy-vline 
WA_DB4ST4RFC_STR-DBREL sy-vline 
WA_DB4ST4RFC_STR-RFCDEST sy-vline 
WA_DB4ST4RFC_STR-DBHOST sy-vline 
WA_DB4ST4RFC_STR-DBCNAME sy-vline 
WA_DB4ST4RFC_STR-QQDMPTIME sy-vline 
WA_DB4ST4RFC_STR-QQSUMCNT sy-vline 
WA_DB4ST4RFC_STR-QQCOMCNT sy-vline 
WA_DB4ST4RFC_STR-QQRBKCNT sy-vline 
WA_DB4ST4RFC_STR-QQSELCNT sy-vline 
WA_DB4ST4RFC_STR-QQINSCNT sy-vline 
WA_DB4ST4RFC_STR-QQUPDCNT sy-vline 
WA_DB4ST4RFC_STR-QQDELCNT sy-vline 
WA_DB4ST4RFC_STR-QQDDLCNT sy-vline 
WA_DB4ST4RFC_STR-QQOTHCNT sy-vline 
WA_DB4ST4RFC_STR-QQTSCCNT sy-vline 
WA_DB4ST4RFC_STR-QQTSCTOTR sy-vline 
WA_DB4ST4RFC_STR-QQTSCTTIME sy-vline 
WA_DB4ST4RFC_STR-QQSRTCNT sy-vline 
WA_DB4ST4RFC_STR-QQSRTTOTR sy-vline 
WA_DB4ST4RFC_STR-QQSRTTTIME sy-vline 
WA_DB4ST4RFC_STR-QQIDCCNT sy-vline 
WA_DB4ST4RFC_STR-QQIDCTTIME sy-vline 
WA_DB4ST4RFC_STR-QQTMFCNT sy-vline 
WA_DB4ST4RFC_STR-QQTMFTTIME sy-vline 
WA_DB4ST4RFC_STR-QQIDACNT sy-vline 
WA_DB4ST4RFC_STR-QQIDATBCNT sy-vline 
WA_DB4ST4RFC_STR-QQIDAQRYCT sy-vline 
WA_DB4ST4RFC_STR-QQODFTIME sy-vline 
WA_DB4ST4RFC_STR-QQTOTAVGT sy-vline 
WA_DB4ST4RFC_STR-QQTOTTIME sy-vline 
WA_DB4ST4RFC_STR-PHYSREAD sy-vline 
WA_DB4ST4RFC_STR-LOGICREAD sy-vline 
WA_DB4ST4RFC_STR-QUALITY sy-vline 
WA_DB4ST4RFC_STR-READPCALL sy-vline 
WA_DB4ST4RFC_STR-TIMEPCALL sy-vline      INTO ld_text SEPARATED BY SPACE.

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