ABAP Select data from SAP table ALV_TREE_CHVW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ALV_TREE_CHVW
*  INTO TABLE @DATA(IT_ALV_TREE_CHVW2).
*--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_ALV_TREE_CHVW INDEX 1 INTO DATA(WA_ALV_TREE_CHVW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ALV_TREE_CHVW>-ID = 1.
<ALV_TREE_CHVW>-LEVEL = 1.
<ALV_TREE_CHVW>-TYPE = 1.
<ALV_TREE_CHVW>-MATNR = 1.
<ALV_TREE_CHVW>-WERKS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ALV_TREE_CHVW-CHARG, sy-vline,
  WA_ALV_TREE_CHVW-ZUSTD, sy-vline,
  WA_ALV_TREE_CHVW-LICHA, sy-vline,
  WA_ALV_TREE_CHVW-MENGE, sy-vline,
  WA_ALV_TREE_CHVW-MEINS, sy-vline,
  WA_ALV_TREE_CHVW-AUFNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ALV_TREE_CHVW 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_ALV_TREE_CHVW 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_ALV_TREE_CHVW INTO WA_ALV_TREE_CHVW.


*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 MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ALV_TREE_CHVW-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ALV_TREE_CHVW-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ALV_TREE_CHVW-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ALV_TREE_CHVW-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ALV_TREE_CHVW-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ALV_TREE_CHVW-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ALV_TREE_CHVW-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ALV_TREE_CHVW-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KDAUF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ALV_TREE_CHVW-KDAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ALV_TREE_CHVW-KDAUF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ALV_TREE_CHVW-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ALV_TREE_CHVW-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR_WE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ALV_TREE_CHVW-KUNNR_WE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ALV_TREE_CHVW-KUNNR_WE.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field ACT_SYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ALV_TREE_CHVW-ACT_SYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ALV_TREE_CHVW-ACT_SYSTEM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SYS_LINK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ALV_TREE_CHVW-SYS_LINK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ALV_TREE_CHVW-SYS_LINK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field AJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ALV_TREE_CHVW-AJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ALV_TREE_CHVW-AJAHR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field /CWM/MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ALV_TREE_CHVW-/CWM/MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ALV_TREE_CHVW-/CWM/MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MILL_OC_AUFNR_O
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ALV_TREE_CHVW-MILL_OC_AUFNR_O
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ALV_TREE_CHVW-MILL_OC_AUFNR_O.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MILL_UA_AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ALV_TREE_CHVW-MILL_UA_AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ALV_TREE_CHVW-MILL_UA_AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TRIALID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ALV_TREE_CHVW-TRIALID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ALV_TREE_CHVW-TRIALID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SHIP2PARTY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ALV_TREE_CHVW-SHIP2PARTY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ALV_TREE_CHVW-SHIP2PARTY.
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_ALV_TREE_CHVW_STR, 
ID TYPE STRING,
LEVEL TYPE STRING,
TYPE TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
CHARG TYPE STRING,
ZUSTD TYPE STRING,
LICHA TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
AUFNR TYPE STRING,
AUFPS TYPE STRING,
AUTYP TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
PSTYP TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
KUNNR_WE TYPE STRING,
UMMAT TYPE STRING,
UMWRK TYPE STRING,
UMCHA TYPE STRING,
KZBEW TYPE STRING,
LOTAL TYPE STRING,
REDUN TYPE STRING,
REKUR TYPE STRING,
STORNO TYPE STRING,
IND TYPE STRING,
ORIGIN TYPE STRING,
SORT_ALV TYPE STRING,
ACT_SYSTEM TYPE STRING,
SYS_LINK TYPE STRING,
SYS_WERKS TYPE STRING,
UCHKZ TYPE STRING,
AJAHR TYPE STRING,
UCWRK TYPE STRING,
UCMAT TYPE STRING,
UCCHA TYPE STRING,
WIPB_EXIST TYPE STRING,
EXT_LEVEL TYPE STRING,
VERSION TYPE STRING,
/CWM/MENGE TYPE STRING,
/CWM/MEINS TYPE STRING,
CHVW_DUMMY TYPE STRING,
MILL_OC_AUFNR_O TYPE STRING,
MILL_UA_AUFNR TYPE STRING,
TRIALID TYPE STRING,
TRIALNAME TYPE STRING,
SHIP2PARTY TYPE STRING,
MAKTX TYPE STRING,
STORNO_ICON TYPE STRING,
UML_ICON TYPE STRING,
ZUSTD_ICON TYPE STRING,
LOTAL_ICON TYPE STRING,
UC_ICON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ALV_TREE_CHVW_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_ALV_TREE_CHVW_STR-ID sy-vline 
WA_ALV_TREE_CHVW_STR-LEVEL sy-vline 
WA_ALV_TREE_CHVW_STR-TYPE sy-vline 
WA_ALV_TREE_CHVW_STR-MATNR sy-vline 
WA_ALV_TREE_CHVW_STR-WERKS sy-vline 
WA_ALV_TREE_CHVW_STR-CHARG sy-vline 
WA_ALV_TREE_CHVW_STR-ZUSTD sy-vline 
WA_ALV_TREE_CHVW_STR-LICHA sy-vline 
WA_ALV_TREE_CHVW_STR-MENGE sy-vline 
WA_ALV_TREE_CHVW_STR-MEINS sy-vline 
WA_ALV_TREE_CHVW_STR-AUFNR sy-vline 
WA_ALV_TREE_CHVW_STR-AUFPS sy-vline 
WA_ALV_TREE_CHVW_STR-AUTYP sy-vline 
WA_ALV_TREE_CHVW_STR-EBELN sy-vline 
WA_ALV_TREE_CHVW_STR-EBELP sy-vline 
WA_ALV_TREE_CHVW_STR-PSTYP sy-vline 
WA_ALV_TREE_CHVW_STR-KDAUF sy-vline 
WA_ALV_TREE_CHVW_STR-KDPOS sy-vline 
WA_ALV_TREE_CHVW_STR-VBELN sy-vline 
WA_ALV_TREE_CHVW_STR-POSNR sy-vline 
WA_ALV_TREE_CHVW_STR-KUNNR_WE sy-vline 
WA_ALV_TREE_CHVW_STR-UMMAT sy-vline 
WA_ALV_TREE_CHVW_STR-UMWRK sy-vline 
WA_ALV_TREE_CHVW_STR-UMCHA sy-vline 
WA_ALV_TREE_CHVW_STR-KZBEW sy-vline 
WA_ALV_TREE_CHVW_STR-LOTAL sy-vline 
WA_ALV_TREE_CHVW_STR-REDUN sy-vline 
WA_ALV_TREE_CHVW_STR-REKUR sy-vline 
WA_ALV_TREE_CHVW_STR-STORNO sy-vline 
WA_ALV_TREE_CHVW_STR-IND sy-vline 
WA_ALV_TREE_CHVW_STR-ORIGIN sy-vline 
WA_ALV_TREE_CHVW_STR-SORT_ALV sy-vline 
WA_ALV_TREE_CHVW_STR-ACT_SYSTEM sy-vline 
WA_ALV_TREE_CHVW_STR-SYS_LINK sy-vline 
WA_ALV_TREE_CHVW_STR-SYS_WERKS sy-vline 
WA_ALV_TREE_CHVW_STR-UCHKZ sy-vline 
WA_ALV_TREE_CHVW_STR-AJAHR sy-vline 
WA_ALV_TREE_CHVW_STR-UCWRK sy-vline 
WA_ALV_TREE_CHVW_STR-UCMAT sy-vline 
WA_ALV_TREE_CHVW_STR-UCCHA sy-vline 
WA_ALV_TREE_CHVW_STR-WIPB_EXIST sy-vline 
WA_ALV_TREE_CHVW_STR-EXT_LEVEL sy-vline 
WA_ALV_TREE_CHVW_STR-VERSION sy-vline 
WA_ALV_TREE_CHVW_STR-/CWM/MENGE sy-vline 
WA_ALV_TREE_CHVW_STR-/CWM/MEINS sy-vline 
WA_ALV_TREE_CHVW_STR-CHVW_DUMMY sy-vline 
WA_ALV_TREE_CHVW_STR-MILL_OC_AUFNR_O sy-vline 
WA_ALV_TREE_CHVW_STR-MILL_UA_AUFNR sy-vline 
WA_ALV_TREE_CHVW_STR-TRIALID sy-vline 
WA_ALV_TREE_CHVW_STR-TRIALNAME sy-vline 
WA_ALV_TREE_CHVW_STR-SHIP2PARTY sy-vline 
WA_ALV_TREE_CHVW_STR-MAKTX sy-vline 
WA_ALV_TREE_CHVW_STR-STORNO_ICON sy-vline 
WA_ALV_TREE_CHVW_STR-UML_ICON sy-vline 
WA_ALV_TREE_CHVW_STR-ZUSTD_ICON sy-vline 
WA_ALV_TREE_CHVW_STR-LOTAL_ICON sy-vline 
WA_ALV_TREE_CHVW_STR-UC_ICON sy-vline      INTO ld_text SEPARATED BY SPACE.

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