ABAP Select data from SAP table EHFNDS_LHR_TREE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHFNDS_LHR_TREE
*  INTO TABLE @DATA(IT_EHFNDS_LHR_TREE2).
*--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_EHFNDS_LHR_TREE INDEX 1 INTO DATA(WA_EHFNDS_LHR_TREE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EHFNDS_LHR_TREE>-KEY = 1.
<EHFNDS_LHR_TREE>-PARENT_KEY = 1.
<EHFNDS_LHR_TREE>-ROOT_KEY = 1.
<EHFNDS_LHR_TREE>-CREA_DATE_TIME = 1.
<EHFNDS_LHR_TREE>-CREA_UNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHFNDS_LHR_TREE-LCHG_DATE_TIME, sy-vline,
  WA_EHFNDS_LHR_TREE-LCHG_UNAME, sy-vline,
  WA_EHFNDS_LHR_TREE-LOC_ROOT_REF_KEY, sy-vline,
  WA_EHFNDS_LHR_TREE-PAR_ROOT_REF_KEY, sy-vline,
  WA_EHFNDS_LHR_TREE-ROW_KEY, sy-vline,
  WA_EHFNDS_LHR_TREE-TREE_PARENT_KEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHFNDS_LHR_TREE 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_EHFNDS_LHR_TREE 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_EHFNDS_LHR_TREE INTO WA_EHFNDS_LHR_TREE.


*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 LCRID, internal->external for field LOC_ROOT_REF_KEY
CALL FUNCTION 'CONVERSION_EXIT_LCRID_OUTPUT'
  EXPORTING
    input =                      WA_EHFNDS_LHR_TREE-LOC_ROOT_REF_KEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHFNDS_LHR_TREE-LOC_ROOT_REF_KEY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit LCRID, internal->external for field PAR_ROOT_REF_KEY
CALL FUNCTION 'CONVERSION_EXIT_LCRID_OUTPUT'
  EXPORTING
    input =                      WA_EHFNDS_LHR_TREE-PAR_ROOT_REF_KEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHFNDS_LHR_TREE-PAR_ROOT_REF_KEY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit LCTYP, internal->external for field LOCATION_TYPE
CALL FUNCTION 'CONVERSION_EXIT_LCTYP_OUTPUT'
  EXPORTING
    input =                      WA_EHFNDS_LHR_TREE-LOCATION_TYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHFNDS_LHR_TREE-LOCATION_TYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DFVAL, internal->external for field LOCATION_STAT
CALL FUNCTION 'CONVERSION_EXIT_DFVAL_OUTPUT'
  EXPORTING
    input =                      WA_EHFNDS_LHR_TREE-LOCATION_STAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHFNDS_LHR_TREE-LOCATION_STAT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOCATION_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EHFNDS_LHR_TREE-LOCATION_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHFNDS_LHR_TREE-LOCATION_ID.
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_EHFNDS_LHR_TREE_STR, 
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
CREA_DATE_TIME TYPE STRING,
CREA_UNAME TYPE STRING,
LCHG_DATE_TIME TYPE STRING,
LCHG_UNAME TYPE STRING,
LOC_ROOT_REF_KEY TYPE STRING,
PAR_ROOT_REF_KEY TYPE STRING,
ROW_KEY TYPE STRING,
TREE_PARENT_KEY TYPE STRING,
EXPANDED TYPE STRING,
IS_LEAF TYPE STRING,
CHILD_LOAD TYPE STRING,
TEXT TYPE STRING,
IMAGE_SRC TYPE STRING,
TOOLTIP_TEXT TYPE STRING,
LOCATION_DESC TYPE STRING,
LOCATION_TYPE TYPE STRING,
LOCATION_STAT TYPE STRING,
FUEQ_ID TYPE STRING,
LOCATION_STAT_DESC TYPE STRING,
OBJECT_TYPE TYPE STRING,
OBJECT TYPE STRING,
PRED_TYPE TYPE STRING,
PREDECESSOR TYPE STRING,
HLEVEL TYPE STRING,
DESCRIPTION TYPE STRING,
DISPLAY_TYPE TYPE STRING,
LEAF_LEVEL TYPE STRING,
LEAF_STATUS TYPE STRING,
MASTER_CELL_DESIGN TYPE STRING,
LOCATION_REV_KEY TYPE STRING,
OPEN_LINK TYPE STRING,
LOC_COUNT TYPE STRING,
LOCATION_ID TYPE STRING,
LINK_REF TYPE STRING,
RECORDS_COUNT TYPE STRING,
RESP_PERSONS TYPE STRING,
ADDIT_DESCR TYPE STRING,
CLASSIFIERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHFNDS_LHR_TREE_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_EHFNDS_LHR_TREE_STR-KEY sy-vline 
WA_EHFNDS_LHR_TREE_STR-PARENT_KEY sy-vline 
WA_EHFNDS_LHR_TREE_STR-ROOT_KEY sy-vline 
WA_EHFNDS_LHR_TREE_STR-CREA_DATE_TIME sy-vline 
WA_EHFNDS_LHR_TREE_STR-CREA_UNAME sy-vline 
WA_EHFNDS_LHR_TREE_STR-LCHG_DATE_TIME sy-vline 
WA_EHFNDS_LHR_TREE_STR-LCHG_UNAME sy-vline 
WA_EHFNDS_LHR_TREE_STR-LOC_ROOT_REF_KEY sy-vline 
WA_EHFNDS_LHR_TREE_STR-PAR_ROOT_REF_KEY sy-vline 
WA_EHFNDS_LHR_TREE_STR-ROW_KEY sy-vline 
WA_EHFNDS_LHR_TREE_STR-TREE_PARENT_KEY sy-vline 
WA_EHFNDS_LHR_TREE_STR-EXPANDED sy-vline 
WA_EHFNDS_LHR_TREE_STR-IS_LEAF sy-vline 
WA_EHFNDS_LHR_TREE_STR-CHILD_LOAD sy-vline 
WA_EHFNDS_LHR_TREE_STR-TEXT sy-vline 
WA_EHFNDS_LHR_TREE_STR-IMAGE_SRC sy-vline 
WA_EHFNDS_LHR_TREE_STR-TOOLTIP_TEXT sy-vline 
WA_EHFNDS_LHR_TREE_STR-LOCATION_DESC sy-vline 
WA_EHFNDS_LHR_TREE_STR-LOCATION_TYPE sy-vline 
WA_EHFNDS_LHR_TREE_STR-LOCATION_STAT sy-vline 
WA_EHFNDS_LHR_TREE_STR-FUEQ_ID sy-vline 
WA_EHFNDS_LHR_TREE_STR-LOCATION_STAT_DESC sy-vline 
WA_EHFNDS_LHR_TREE_STR-OBJECT_TYPE sy-vline 
WA_EHFNDS_LHR_TREE_STR-OBJECT sy-vline 
WA_EHFNDS_LHR_TREE_STR-PRED_TYPE sy-vline 
WA_EHFNDS_LHR_TREE_STR-PREDECESSOR sy-vline 
WA_EHFNDS_LHR_TREE_STR-HLEVEL sy-vline 
WA_EHFNDS_LHR_TREE_STR-DESCRIPTION sy-vline 
WA_EHFNDS_LHR_TREE_STR-DISPLAY_TYPE sy-vline 
WA_EHFNDS_LHR_TREE_STR-LEAF_LEVEL sy-vline 
WA_EHFNDS_LHR_TREE_STR-LEAF_STATUS sy-vline 
WA_EHFNDS_LHR_TREE_STR-MASTER_CELL_DESIGN sy-vline 
WA_EHFNDS_LHR_TREE_STR-LOCATION_REV_KEY sy-vline 
WA_EHFNDS_LHR_TREE_STR-OPEN_LINK sy-vline 
WA_EHFNDS_LHR_TREE_STR-LOC_COUNT sy-vline 
WA_EHFNDS_LHR_TREE_STR-LOCATION_ID sy-vline 
WA_EHFNDS_LHR_TREE_STR-LINK_REF sy-vline 
WA_EHFNDS_LHR_TREE_STR-RECORDS_COUNT sy-vline 
WA_EHFNDS_LHR_TREE_STR-RESP_PERSONS sy-vline 
WA_EHFNDS_LHR_TREE_STR-ADDIT_DESCR sy-vline 
WA_EHFNDS_LHR_TREE_STR-CLASSIFIERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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