ABAP Select data from SAP table RJKSDLOGNODE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJKSDLOGNODE
*  INTO TABLE @DATA(IT_RJKSDLOGNODE2).
*--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_RJKSDLOGNODE INDEX 1 INTO DATA(WA_RJKSDLOGNODE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJKSDLOGNODE>-NODE = 1.
<RJKSDLOGNODE>-EXPAND = 1.
<RJKSDLOGNODE>-MSG = 1.
<RJKSDLOGNODE>-MSGTY = 1.
<RJKSDLOGNODE>-MSGID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJKSDLOGNODE-MSGNO, sy-vline,
  WA_RJKSDLOGNODE-MSGV1, sy-vline,
  WA_RJKSDLOGNODE-MSGV2, sy-vline,
  WA_RJKSDLOGNODE-MSGV3, sy-vline,
  WA_RJKSDLOGNODE-MSGV4, sy-vline,
  WA_RJKSDLOGNODE-MSGV1_SRC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJKSDLOGNODE 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_RJKSDLOGNODE 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_RJKSDLOGNODE INTO WA_RJKSDLOGNODE.


*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_RJKSDLOGNODE_STR, 
NODE TYPE STRING,
EXPAND TYPE STRING,
MSG TYPE STRING,
MSGTY TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
MSGV1_SRC TYPE STRING,
MSGV2_SRC TYPE STRING,
MSGV3_SRC TYPE STRING,
MSGV4_SRC TYPE STRING,
DETLEVEL TYPE STRING,
PROBCLASS TYPE STRING,
ALSORT TYPE STRING,
TIME_STMP TYPE STRING,
MSG_COUNT TYPE STRING,
CONTEXT TYPE STRING,
TABNAME TYPE STRING,
VALUE TYPE STRING,
PARAMS TYPE STRING,
T_PAR TYPE STRING,
CALLBACK TYPE STRING,
USEREXITP TYPE STRING,
USEREXITF TYPE STRING,
USEREXITT TYPE STRING,
ALTEXT TYPE STRING,
LEVEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJKSDLOGNODE_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_RJKSDLOGNODE_STR-NODE sy-vline 
WA_RJKSDLOGNODE_STR-EXPAND sy-vline 
WA_RJKSDLOGNODE_STR-MSG sy-vline 
WA_RJKSDLOGNODE_STR-MSGTY sy-vline 
WA_RJKSDLOGNODE_STR-MSGID sy-vline 
WA_RJKSDLOGNODE_STR-MSGNO sy-vline 
WA_RJKSDLOGNODE_STR-MSGV1 sy-vline 
WA_RJKSDLOGNODE_STR-MSGV2 sy-vline 
WA_RJKSDLOGNODE_STR-MSGV3 sy-vline 
WA_RJKSDLOGNODE_STR-MSGV4 sy-vline 
WA_RJKSDLOGNODE_STR-MSGV1_SRC sy-vline 
WA_RJKSDLOGNODE_STR-MSGV2_SRC sy-vline 
WA_RJKSDLOGNODE_STR-MSGV3_SRC sy-vline 
WA_RJKSDLOGNODE_STR-MSGV4_SRC sy-vline 
WA_RJKSDLOGNODE_STR-DETLEVEL sy-vline 
WA_RJKSDLOGNODE_STR-PROBCLASS sy-vline 
WA_RJKSDLOGNODE_STR-ALSORT sy-vline 
WA_RJKSDLOGNODE_STR-TIME_STMP sy-vline 
WA_RJKSDLOGNODE_STR-MSG_COUNT sy-vline 
WA_RJKSDLOGNODE_STR-CONTEXT sy-vline 
WA_RJKSDLOGNODE_STR-TABNAME sy-vline 
WA_RJKSDLOGNODE_STR-VALUE sy-vline 
WA_RJKSDLOGNODE_STR-PARAMS sy-vline 
WA_RJKSDLOGNODE_STR-T_PAR sy-vline 
WA_RJKSDLOGNODE_STR-CALLBACK sy-vline 
WA_RJKSDLOGNODE_STR-USEREXITP sy-vline 
WA_RJKSDLOGNODE_STR-USEREXITF sy-vline 
WA_RJKSDLOGNODE_STR-USEREXITT sy-vline 
WA_RJKSDLOGNODE_STR-ALTEXT sy-vline 
WA_RJKSDLOGNODE_STR-LEVEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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