ABAP Select data from SAP table RNAGENT into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNAGENT
*  INTO TABLE @DATA(IT_RNAGENT2).
*--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_RNAGENT INDEX 1 INTO DATA(WA_RNAGENT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNAGENT>-MANDT = 1.
<RNAGENT>-AGENTID = 1.
<RNAGENT>-CATIDBDC = 1.
<RNAGENT>-EXTKEY = 1.
<RNAGENT>-VERSDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNAGENT-EXTDCODECAT, sy-vline,
  WA_RNAGENT-EXTDINGCODE, sy-vline,
  WA_RNAGENT-AGTYPE, sy-vline,
  WA_RNAGENT-EXTCATID, sy-vline,
  WA_RNAGENT-UPUSR, sy-vline,
  WA_RNAGENT-UPDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNAGENT 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_RNAGENT 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_RNAGENT INTO WA_RNAGENT.


*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 ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RNAGENT-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNAGENT-SPRAS.
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_RNAGENT_STR, 
MANDT TYPE STRING,
AGENTID TYPE STRING,
CATIDBDC TYPE STRING,
EXTKEY TYPE STRING,
VERSDATE TYPE STRING,
EXTDCODECAT TYPE STRING,
EXTDINGCODE TYPE STRING,
AGTYPE TYPE STRING,
EXTCATID TYPE STRING,
UPUSR TYPE STRING,
UPDAT TYPE STRING,
UPTIM TYPE STRING,
ERUSR TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
LOEKZ TYPE STRING,
LOUSR TYPE STRING,
LODAT TYPE STRING,
LOTIM TYPE STRING,
SPRAS TYPE STRING,
AGENT TYPE STRING,
DESCR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNAGENT_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_RNAGENT_STR-MANDT sy-vline 
WA_RNAGENT_STR-AGENTID sy-vline 
WA_RNAGENT_STR-CATIDBDC sy-vline 
WA_RNAGENT_STR-EXTKEY sy-vline 
WA_RNAGENT_STR-VERSDATE sy-vline 
WA_RNAGENT_STR-EXTDCODECAT sy-vline 
WA_RNAGENT_STR-EXTDINGCODE sy-vline 
WA_RNAGENT_STR-AGTYPE sy-vline 
WA_RNAGENT_STR-EXTCATID sy-vline 
WA_RNAGENT_STR-UPUSR sy-vline 
WA_RNAGENT_STR-UPDAT sy-vline 
WA_RNAGENT_STR-UPTIM sy-vline 
WA_RNAGENT_STR-ERUSR sy-vline 
WA_RNAGENT_STR-ERDAT sy-vline 
WA_RNAGENT_STR-ERTIM sy-vline 
WA_RNAGENT_STR-LOEKZ sy-vline 
WA_RNAGENT_STR-LOUSR sy-vline 
WA_RNAGENT_STR-LODAT sy-vline 
WA_RNAGENT_STR-LOTIM sy-vline 
WA_RNAGENT_STR-SPRAS sy-vline 
WA_RNAGENT_STR-AGENT sy-vline 
WA_RNAGENT_STR-DESCR sy-vline      INTO ld_text SEPARATED BY SPACE.

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