ABAP Select data from SAP table JBRTREEINC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM JBRTREEINC
*  INTO TABLE @DATA(IT_JBRTREEINC2).
*--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_JBRTREEINC INDEX 1 INTO DATA(WA_JBRTREEINC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<JBRTREEINC>-TYPE = 1.
<JBRTREEINC>-NAME = 1.
<JBRTREEINC>-TLEVEL = 1.
<JBRTREEINC>-LINK = 1.
<JBRTREEINC>-COMPRESSR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_JBRTREEINC-LEAF, sy-vline,
  WA_JBRTREEINC-TLOCK, sy-vline,
  WA_JBRTREEINC-PARENT, sy-vline,
  WA_JBRTREEINC-CHILD, sy-vline,
  WA_JBRTREEINC-NEXTR, sy-vline,
  WA_JBRTREEINC-INDX_IN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_JBRTREEINC 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_JBRTREEINC 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_JBRTREEINC INTO WA_JBRTREEINC.


*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_JBRTREEINC_STR, 
TYPE TYPE STRING,
NAME TYPE STRING,
TLEVEL TYPE STRING,
LINK TYPE STRING,
COMPRESSR TYPE STRING,
LEAF TYPE STRING,
TLOCK TYPE STRING,
PARENT TYPE STRING,
CHILD TYPE STRING,
NEXTR TYPE STRING,
INDX_IN TYPE STRING,
INTRV_FLAG TYPE STRING,
ADD_FLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_JBRTREEINC_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_JBRTREEINC_STR-TYPE sy-vline 
WA_JBRTREEINC_STR-NAME sy-vline 
WA_JBRTREEINC_STR-TLEVEL sy-vline 
WA_JBRTREEINC_STR-LINK sy-vline 
WA_JBRTREEINC_STR-COMPRESSR sy-vline 
WA_JBRTREEINC_STR-LEAF sy-vline 
WA_JBRTREEINC_STR-TLOCK sy-vline 
WA_JBRTREEINC_STR-PARENT sy-vline 
WA_JBRTREEINC_STR-CHILD sy-vline 
WA_JBRTREEINC_STR-NEXTR sy-vline 
WA_JBRTREEINC_STR-INDX_IN sy-vline 
WA_JBRTREEINC_STR-INTRV_FLAG sy-vline 
WA_JBRTREEINC_STR-ADD_FLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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