ABAP Select data from SAP table RJP_TREE_CONTROL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJP_TREE_CONTROL
*  INTO TABLE @DATA(IT_RJP_TREE_CONTROL2).
*--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_RJP_TREE_CONTROL INDEX 1 INTO DATA(WA_RJP_TREE_CONTROL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJP_TREE_CONTROL>-ISM_MATNR = 1.
<RJP_TREE_CONTROL>-NO_ALLOCATED_DATA = 1.
<RJP_TREE_CONTROL>-ISMMATNR_PRODUCT = 1.
<RJP_TREE_CONTROL>-ISMMATNR_FAMILY = 1.
<RJP_TREE_CONTROL>-ISS_SEQ_SELOBJ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJP_TREE_CONTROL-ISS_PUBLDATE_FROM, sy-vline,
  WA_RJP_TREE_CONTROL-ISS_PUBLDATE_TO, sy-vline,
  WA_RJP_TREE_CONTROL-ISS_COPYNR_FROM, sy-vline,
  WA_RJP_TREE_CONTROL-ISS_COPYNR_TO, sy-vline,
  WA_RJP_TREE_CONTROL-ISS_EDITION_FROM, sy-vline,
  WA_RJP_TREE_CONTROL-ISS_EDITION_TO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJP_TREE_CONTROL 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_RJP_TREE_CONTROL 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_RJP_TREE_CONTROL INTO WA_RJP_TREE_CONTROL.


*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 MATN1, internal->external for field ISM_MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RJP_TREE_CONTROL-ISM_MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJP_TREE_CONTROL-ISM_MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field ISMMATNR_PRODUCT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RJP_TREE_CONTROL-ISMMATNR_PRODUCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJP_TREE_CONTROL-ISMMATNR_PRODUCT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field ISMMATNR_FAMILY
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RJP_TREE_CONTROL-ISMMATNR_FAMILY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJP_TREE_CONTROL-ISMMATNR_FAMILY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field ISS_EDITION_FROM
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RJP_TREE_CONTROL-ISS_EDITION_FROM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJP_TREE_CONTROL-ISS_EDITION_FROM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field ISS_EDITION_TO
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RJP_TREE_CONTROL-ISS_EDITION_TO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJP_TREE_CONTROL-ISS_EDITION_TO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field ISM_ENQUEUE_PRODUCT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RJP_TREE_CONTROL-ISM_ENQUEUE_PRODUCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJP_TREE_CONTROL-ISM_ENQUEUE_PRODUCT.
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_RJP_TREE_CONTROL_STR, 
ISM_MATNR TYPE STRING,
NO_ALLOCATED_DATA TYPE STRING,
ISMMATNR_PRODUCT TYPE STRING,
ISMMATNR_FAMILY TYPE STRING,
ISS_SEQ_SELOBJ TYPE STRING,
ISS_PUBLDATE_FROM TYPE STRING,
ISS_PUBLDATE_TO TYPE STRING,
ISS_COPYNR_FROM TYPE STRING,
ISS_COPYNR_TO TYPE STRING,
ISS_EDITION_FROM TYPE STRING,
ISS_EDITION_TO TYPE STRING,
ISS_SEQ_ICON TYPE STRING,
FLG_PROD_WO_FAM TYPE STRING,
FLG_ISS_WO_PROD TYPE STRING,
FLG_BROWSER TYPE STRING,
FLG_SEL_ADD_ACTIVE TYPE STRING,
FLG_SEL_ADD_DATA TYPE STRING,
FLG_SEL_SEQ_ACTIVE TYPE STRING,
FLG_EXT_SELECTION TYPE STRING,
ISM_ENQUEUE_PRODUCT TYPE STRING,
ISMPUBLDATE_FROM TYPE STRING,
ISMPUBLDATE_TO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJP_TREE_CONTROL_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_RJP_TREE_CONTROL_STR-ISM_MATNR sy-vline 
WA_RJP_TREE_CONTROL_STR-NO_ALLOCATED_DATA sy-vline 
WA_RJP_TREE_CONTROL_STR-ISMMATNR_PRODUCT sy-vline 
WA_RJP_TREE_CONTROL_STR-ISMMATNR_FAMILY sy-vline 
WA_RJP_TREE_CONTROL_STR-ISS_SEQ_SELOBJ sy-vline 
WA_RJP_TREE_CONTROL_STR-ISS_PUBLDATE_FROM sy-vline 
WA_RJP_TREE_CONTROL_STR-ISS_PUBLDATE_TO sy-vline 
WA_RJP_TREE_CONTROL_STR-ISS_COPYNR_FROM sy-vline 
WA_RJP_TREE_CONTROL_STR-ISS_COPYNR_TO sy-vline 
WA_RJP_TREE_CONTROL_STR-ISS_EDITION_FROM sy-vline 
WA_RJP_TREE_CONTROL_STR-ISS_EDITION_TO sy-vline 
WA_RJP_TREE_CONTROL_STR-ISS_SEQ_ICON sy-vline 
WA_RJP_TREE_CONTROL_STR-FLG_PROD_WO_FAM sy-vline 
WA_RJP_TREE_CONTROL_STR-FLG_ISS_WO_PROD sy-vline 
WA_RJP_TREE_CONTROL_STR-FLG_BROWSER sy-vline 
WA_RJP_TREE_CONTROL_STR-FLG_SEL_ADD_ACTIVE sy-vline 
WA_RJP_TREE_CONTROL_STR-FLG_SEL_ADD_DATA sy-vline 
WA_RJP_TREE_CONTROL_STR-FLG_SEL_SEQ_ACTIVE sy-vline 
WA_RJP_TREE_CONTROL_STR-FLG_EXT_SELECTION sy-vline 
WA_RJP_TREE_CONTROL_STR-ISM_ENQUEUE_PRODUCT sy-vline 
WA_RJP_TREE_CONTROL_STR-ISMPUBLDATE_FROM sy-vline 
WA_RJP_TREE_CONTROL_STR-ISMPUBLDATE_TO sy-vline      INTO ld_text SEPARATED BY SPACE.

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