ABAP Select data from SAP table HAP_S_FREE_ENH_STRUCT_TREE into internal table



Get Example source ABAP code based on a different SAP table
  

So we all know S/4Hana is the latest version and the future of SAP but what about the selecting data from hana tables, is it 5he same and what do tables like HAP_S_FREE_ENH_STRUCT_TREE look like in an S/4 system. If you havent seen or logged into an S/4Hana system you might be surprised at how similar it looks to the previous ERP/ECC version. Infact when using the gui it is difficult to tell the difference, and selecting data from database tables the same is true. Infact even for tables that have been replaced in hana, SAP have purposfully created versions of the old/original tables for backward compatability. This means your existing ABAP code will still work while you implement changes that take advantage of the new functionality and Hana in-memory tables.

Below is a number of ABAP code snippets to demonstrate how to select data from SAP HAP_S_FREE_ENH_STRUCT_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 HAP_S_FREE_ENH_STRUCT_TREE. See here for more generic Select statement tips.

DATA: IT_HAP_S_FREE_ENH_STRUCT_TREE TYPE STANDARD TABLE OF HAP_S_FREE_ENH_STRUCT_TREE,
      WA_HAP_S_FREE_ENH_STRUCT_TREE TYPE HAP_S_FREE_ENH_STRUCT_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: <HAP_S_FREE_ENH_STRUCT_TREE> TYPE HAP_S_FREE_ENH_STRUCT_TREE.

*Process all fields in table header/work area as string values, full declaration of the HAP_S_FREE_ENH_STRUCT_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.
  PERFORM process_as_string_field_values CHANGING wa_HAP_S_FREE_ENH_STRUCT_TREE.

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HAP_S_FREE_ENH_STRUCT_TREE
*  INTO TABLE @DATA(IT_HAP_S_FREE_ENH_STRUCT_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_HAP_S_FREE_ENH_STRUCT_TREE INDEX 1 INTO DATA(WA_HAP_S_FREE_ENH_STRUCT_TREE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_HAP_S_FREE_ENH_STRUCT_TREE ASSIGNING <HAP_S_FREE_ENH_STRUCT_TREE>.
*To update a field value using a field symbol simply change the value via the field symbol pointer
<HAP_S_FREE_ENH_STRUCT_TREE>-PLVAR = 1.
<HAP_S_FREE_ENH_STRUCT_TREE>-OTYPE = 1.
<HAP_S_FREE_ENH_STRUCT_TREE>-SOBID = 1.
<HAP_S_FREE_ENH_STRUCT_TREE>-PARENT_OTYPE = 1.
<HAP_S_FREE_ENH_STRUCT_TREE>-PARENT_SOBID = 1.
ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HAP_S_FREE_ENH_STRUCT_TREE-SELECTABLE, sy-vline,
WA_HAP_S_FREE_ENH_STRUCT_TREE-SELECTED, sy-vline,
WA_HAP_S_FREE_ENH_STRUCT_TREE-_TREE_KEY, sy-vline,
WA_HAP_S_FREE_ENH_STRUCT_TREE-_TREE_KEY_PARENT, sy-vline,
WA_HAP_S_FREE_ENH_STRUCT_TREE-_TREE_IS_LEAF, sy-vline,
WA_HAP_S_FREE_ENH_STRUCT_TREE-_TREE_IS_EXPANDED, sy-vline.
ENDLOOP. *Add any further fields from structure WA_HAP_S_FREE_ENH_STRUCT_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_HAP_S_FREE_ENH_STRUCT_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_HAP_S_FREE_ENH_STRUCT_TREE INTO WA_HAP_S_FREE_ENH_STRUCT_TREE. *Write horizonal line to screen report. WRITE:/ sy-uline. *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. This form converts 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_HAP_S_FREE_ENH_STRUCT_TREE_STR,
PLVAR TYPE STRING,
OTYPE TYPE STRING,
SOBID TYPE STRING,
PARENT_OTYPE TYPE STRING,
PARENT_SOBID TYPE STRING,
SELECTABLE TYPE STRING,
SELECTED TYPE STRING,
_TREE_KEY TYPE STRING,
_TREE_KEY_PARENT TYPE STRING,
_TREE_IS_LEAF TYPE STRING,
_TREE_IS_EXPANDED TYPE STRING,END OF T_EKKO_STR. DATA: WA_HAP_S_FREE_ENH_STRUCT_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_HAP_S_FREE_ENH_STRUCT_TREE_STR-PLVAR sy-vline
WA_HAP_S_FREE_ENH_STRUCT_TREE_STR-OTYPE sy-vline
WA_HAP_S_FREE_ENH_STRUCT_TREE_STR-SOBID sy-vline
WA_HAP_S_FREE_ENH_STRUCT_TREE_STR-PARENT_OTYPE sy-vline
WA_HAP_S_FREE_ENH_STRUCT_TREE_STR-PARENT_SOBID sy-vline
WA_HAP_S_FREE_ENH_STRUCT_TREE_STR-SELECTABLE sy-vline
WA_HAP_S_FREE_ENH_STRUCT_TREE_STR-SELECTED sy-vline
WA_HAP_S_FREE_ENH_STRUCT_TREE_STR-_TREE_KEY sy-vline
WA_HAP_S_FREE_ENH_STRUCT_TREE_STR-_TREE_KEY_PARENT sy-vline
WA_HAP_S_FREE_ENH_STRUCT_TREE_STR-_TREE_IS_LEAF sy-vline
WA_HAP_S_FREE_ENH_STRUCT_TREE_STR-_TREE_IS_EXPANDED sy-vline INTO ld_text SEPARATED BY SPACE. *Add any further fields from structure WA_EKKO_STR you want to CONCATENATE... ENDLOOP. ENDFORM.