ABAP Select data from SAP table WRF_PPW_TREE_STY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WRF_PPW_TREE_STY
*  INTO TABLE @DATA(IT_WRF_PPW_TREE_STY2).
*--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_WRF_PPW_TREE_STY INDEX 1 INTO DATA(WA_WRF_PPW_TREE_STY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WRF_PPW_TREE_STY>-MEMBER = 1.
<WRF_PPW_TREE_STY>-RECID = 1.
<WRF_PPW_TREE_STY>-STATUS = 1.
<WRF_PPW_TREE_STY>-FILTER = 1.
<WRF_PPW_TREE_STY>-KEY01 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WRF_PPW_TREE_STY-KEY02, sy-vline,
  WA_WRF_PPW_TREE_STY-KEY03, sy-vline,
  WA_WRF_PPW_TREE_STY-KEY04, sy-vline,
  WA_WRF_PPW_TREE_STY-KEY05, sy-vline,
  WA_WRF_PPW_TREE_STY-KEY06, sy-vline,
  WA_WRF_PPW_TREE_STY-KEY07, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WRF_PPW_TREE_STY 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_WRF_PPW_TREE_STY 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_WRF_PPW_TREE_STY INTO WA_WRF_PPW_TREE_STY.


*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_WRF_PPW_TREE_STY_STR, 
MEMBER TYPE STRING,
RECID TYPE STRING,
STATUS TYPE STRING,
FILTER TYPE STRING,
KEY01 TYPE STRING,
KEY02 TYPE STRING,
KEY03 TYPE STRING,
KEY04 TYPE STRING,
KEY05 TYPE STRING,
KEY06 TYPE STRING,
KEY07 TYPE STRING,
KEY08 TYPE STRING,
KEY09 TYPE STRING,
KEY10 TYPE STRING,
KEY11 TYPE STRING,
KEY12 TYPE STRING,
KEY13 TYPE STRING,
KEY14 TYPE STRING,
KEY15 TYPE STRING,
KEY16 TYPE STRING,
KEY17 TYPE STRING,
KEY18 TYPE STRING,
KEY19 TYPE STRING,
KEY20 TYPE STRING,
T01 TYPE STRING,
T02 TYPE STRING,
T03 TYPE STRING,
T04 TYPE STRING,
T05 TYPE STRING,
T06 TYPE STRING,
T07 TYPE STRING,
T08 TYPE STRING,
T09 TYPE STRING,
T10 TYPE STRING,
T11 TYPE STRING,
T12 TYPE STRING,
T13 TYPE STRING,
T14 TYPE STRING,
T15 TYPE STRING,
T16 TYPE STRING,
T17 TYPE STRING,
T18 TYPE STRING,
T19 TYPE STRING,
T20 TYPE STRING,
VIEW TYPE STRING,
NODE_KEY TYPE STRING,
RELATKEY TYPE STRING,
RELATSHIP TYPE STRING,
HIDDEN TYPE STRING,
DISABLED TYPE STRING,
ISFOLDER TYPE STRING,
N_IMAGE TYPE STRING,
EXP_IMAGE TYPE STRING,
STYLE TYPE STRING,
NO_BRANCH TYPE STRING,
EXPANDER TYPE STRING,
DRAGDROPID TYPE STRING,
USEROBJECT TYPE STRING,
TEXT TYPE STRING,
MEMBER_KEY TYPE STRING,
PARENT_KEY TYPE STRING,
DEPTH TYPE STRING,
SUM_ITEMS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WRF_PPW_TREE_STY_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_WRF_PPW_TREE_STY_STR-MEMBER sy-vline 
WA_WRF_PPW_TREE_STY_STR-RECID sy-vline 
WA_WRF_PPW_TREE_STY_STR-STATUS sy-vline 
WA_WRF_PPW_TREE_STY_STR-FILTER sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY01 sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY02 sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY03 sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY04 sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY05 sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY06 sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY07 sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY08 sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY09 sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY10 sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY11 sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY12 sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY13 sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY14 sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY15 sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY16 sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY17 sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY18 sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY19 sy-vline 
WA_WRF_PPW_TREE_STY_STR-KEY20 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T01 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T02 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T03 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T04 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T05 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T06 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T07 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T08 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T09 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T10 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T11 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T12 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T13 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T14 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T15 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T16 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T17 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T18 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T19 sy-vline 
WA_WRF_PPW_TREE_STY_STR-T20 sy-vline 
WA_WRF_PPW_TREE_STY_STR-VIEW sy-vline 
WA_WRF_PPW_TREE_STY_STR-NODE_KEY sy-vline 
WA_WRF_PPW_TREE_STY_STR-RELATKEY sy-vline 
WA_WRF_PPW_TREE_STY_STR-RELATSHIP sy-vline 
WA_WRF_PPW_TREE_STY_STR-HIDDEN sy-vline 
WA_WRF_PPW_TREE_STY_STR-DISABLED sy-vline 
WA_WRF_PPW_TREE_STY_STR-ISFOLDER sy-vline 
WA_WRF_PPW_TREE_STY_STR-N_IMAGE sy-vline 
WA_WRF_PPW_TREE_STY_STR-EXP_IMAGE sy-vline 
WA_WRF_PPW_TREE_STY_STR-STYLE sy-vline 
WA_WRF_PPW_TREE_STY_STR-NO_BRANCH sy-vline 
WA_WRF_PPW_TREE_STY_STR-EXPANDER sy-vline 
WA_WRF_PPW_TREE_STY_STR-DRAGDROPID sy-vline 
WA_WRF_PPW_TREE_STY_STR-USEROBJECT sy-vline 
WA_WRF_PPW_TREE_STY_STR-TEXT sy-vline 
WA_WRF_PPW_TREE_STY_STR-MEMBER_KEY sy-vline 
WA_WRF_PPW_TREE_STY_STR-PARENT_KEY sy-vline 
WA_WRF_PPW_TREE_STY_STR-DEPTH sy-vline 
WA_WRF_PPW_TREE_STY_STR-SUM_ITEMS sy-vline      INTO ld_text SEPARATED BY SPACE.

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