ABAP Select data from SAP table ECRM_ISU_NAV_TREE_OUTPUT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ECRM_ISU_NAV_TREE_OUTPUT
*  INTO TABLE @DATA(IT_ECRM_ISU_NAV_TREE_OUTPUT2).
*--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_ECRM_ISU_NAV_TREE_OUTPUT INDEX 1 INTO DATA(WA_ECRM_ISU_NAV_TREE_OUTPUT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ECRM_ISU_NAV_TREE_OUTPUT>-XX_DESCRIPTION = 1.
<ECRM_ISU_NAV_TREE_OUTPUT>-OBJECT_ICON = 1.
<ECRM_ISU_NAV_TREE_OUTPUT>-GUID_COMPC = 1.
<ECRM_ISU_NAV_TREE_OUTPUT>-OBJECT_FAMILY = 1.
<ECRM_ISU_NAV_TREE_OUTPUT>-IBASE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ECRM_ISU_NAV_TREE_OUTPUT-VS_VSTELLE, sy-vline,
  WA_ECRM_ISU_NAV_TREE_OUTPUT-INSTANCE, sy-vline,
  WA_ECRM_ISU_NAV_TREE_OUTPUT-STREET, sy-vline,
  WA_ECRM_ISU_NAV_TREE_OUTPUT-STR_SUPPL1, sy-vline,
  WA_ECRM_ISU_NAV_TREE_OUTPUT-STR_SUPPL2, sy-vline,
  WA_ECRM_ISU_NAV_TREE_OUTPUT-HOUSE_NUM1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ECRM_ISU_NAV_TREE_OUTPUT 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_ECRM_ISU_NAV_TREE_OUTPUT 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_ECRM_ISU_NAV_TREE_OUTPUT INTO WA_ECRM_ISU_NAV_TREE_OUTPUT.


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

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

*Conversion exit ALPHA, internal->external for field CT_BUPA_NR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ECRM_ISU_NAV_TREE_OUTPUT-CT_BUPA_NR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ECRM_ISU_NAV_TREE_OUTPUT-CT_BUPA_NR.
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_ECRM_ISU_NAV_TREE_OUTPUT_STR, 
XX_DESCRIPTION TYPE STRING,
OBJECT_ICON TYPE STRING,
GUID_COMPC TYPE STRING,
OBJECT_FAMILY TYPE STRING,
IBASE TYPE STRING,
VS_VSTELLE TYPE STRING,
INSTANCE TYPE STRING,
STREET TYPE STRING,
STR_SUPPL1 TYPE STRING,
STR_SUPPL2 TYPE STRING,
HOUSE_NUM1 TYPE STRING,
HOUSE_NUM2 TYPE STRING,
POST_CODE1 TYPE STRING,
CITY1 TYPE STRING,
FLOOR TYPE STRING,
ROOMNUMBER TYPE STRING,
VS_FLOOR TYPE STRING,
VS_ROOMNUMBER TYPE STRING,
VS_STR_SUPPL1 TYPE STRING,
VS_STR_SUPPL3 TYPE STRING,
VS_HOUSE_NUM2 TYPE STRING,
VS_LGZUSATZ TYPE STRING,
VS_VBSART TYPE STRING,
VS_VBSART_DESC TYPE STRING,
PD_SPARTE TYPE STRING,
PD_SPARTE_DESC TYPE STRING,
PD_SHTXT TYPE STRING,
PD_EXT_UI TYPE STRING,
CT_ORDER_H_GUID TYPE STRING,
CT_ORDER_I_GUID TYPE STRING,
CT_START_DATE TYPE STRING,
CT_STATUS TYPE STRING,
CT_PRODUCT TYPE STRING,
CT_BUPA_NR TYPE STRING,
CT_BU_DESCRIP TYPE STRING,
CT_BU_NAME_L TYPE STRING,
CT_BU_NAME_F TYPE STRING,
CT_QUO_OR_CON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ECRM_ISU_NAV_TREE_OUTPUT_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_ECRM_ISU_NAV_TREE_OUTPUT_STR-XX_DESCRIPTION sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-OBJECT_ICON sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-GUID_COMPC sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-OBJECT_FAMILY sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-IBASE sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-VS_VSTELLE sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-INSTANCE sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-STREET sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-STR_SUPPL1 sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-STR_SUPPL2 sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-HOUSE_NUM1 sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-HOUSE_NUM2 sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-POST_CODE1 sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-CITY1 sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-FLOOR sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-ROOMNUMBER sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-VS_FLOOR sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-VS_ROOMNUMBER sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-VS_STR_SUPPL1 sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-VS_STR_SUPPL3 sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-VS_HOUSE_NUM2 sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-VS_LGZUSATZ sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-VS_VBSART sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-VS_VBSART_DESC sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-PD_SPARTE sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-PD_SPARTE_DESC sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-PD_SHTXT sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-PD_EXT_UI sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-CT_ORDER_H_GUID sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-CT_ORDER_I_GUID sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-CT_START_DATE sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-CT_STATUS sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-CT_PRODUCT sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-CT_BUPA_NR sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-CT_BU_DESCRIP sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-CT_BU_NAME_L sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-CT_BU_NAME_F sy-vline 
WA_ECRM_ISU_NAV_TREE_OUTPUT_STR-CT_QUO_OR_CON sy-vline      INTO ld_text SEPARATED BY SPACE.

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