ABAP Select data from SAP table ISUS_DRF_PREMISE_EXTERN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISUS_DRF_PREMISE_EXTERN
*  INTO TABLE @DATA(IT_ISUS_DRF_PREMISE_EXTERN2).
*--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_ISUS_DRF_PREMISE_EXTERN INDEX 1 INTO DATA(WA_ISUS_DRF_PREMISE_EXTERN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISUS_DRF_PREMISE_EXTERN>-MANDT = 1.
<ISUS_DRF_PREMISE_EXTERN>-VSTELLE = 1.
<ISUS_DRF_PREMISE_EXTERN>-HAUS = 1.
<ISUS_DRF_PREMISE_EXTERN>-STR_ERG2 = 1.
<ISUS_DRF_PREMISE_EXTERN>-HAUS_NUM2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISUS_DRF_PREMISE_EXTERN-TXTLANGU, sy-vline,
  WA_ISUS_DRF_PREMISE_EXTERN-LGZUSATZ, sy-vline,
  WA_ISUS_DRF_PREMISE_EXTERN-VBSART, sy-vline,
  WA_ISUS_DRF_PREMISE_EXTERN-EIGENT, sy-vline,
  WA_ISUS_DRF_PREMISE_EXTERN-OBJNR, sy-vline,
  WA_ISUS_DRF_PREMISE_EXTERN-TPLNUMMER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISUS_DRF_PREMISE_EXTERN 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_ISUS_DRF_PREMISE_EXTERN 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_ISUS_DRF_PREMISE_EXTERN INTO WA_ISUS_DRF_PREMISE_EXTERN.


*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 VSTELLE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISUS_DRF_PREMISE_EXTERN-VSTELLE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISUS_DRF_PREMISE_EXTERN-VSTELLE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field HAUS
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_ISUS_DRF_PREMISE_EXTERN-HAUS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISUS_DRF_PREMISE_EXTERN-HAUS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field TXTLANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ISUS_DRF_PREMISE_EXTERN-TXTLANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISUS_DRF_PREMISE_EXTERN-TXTLANGU.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit TPLNR, internal->external for field TPLNUMMER
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_ISUS_DRF_PREMISE_EXTERN-TPLNUMMER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISUS_DRF_PREMISE_EXTERN-TPLNUMMER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISUS_DRF_PREMISE_EXTERN-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISUS_DRF_PREMISE_EXTERN-GPART.
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_ISUS_DRF_PREMISE_EXTERN_STR, 
MANDT TYPE STRING,
VSTELLE TYPE STRING,
HAUS TYPE STRING,
STR_ERG2 TYPE STRING,
HAUS_NUM2 TYPE STRING,
TXTLANGU TYPE STRING,
LGZUSATZ TYPE STRING,
VBSART TYPE STRING,
EIGENT TYPE STRING,
OBJNR TYPE STRING,
TPLNUMMER TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
BEGRU TYPE STRING,
LOEVM TYPE STRING,
ANZPERS TYPE STRING,
FLOOR TYPE STRING,
ROOMNUMBER TYPE STRING,
HPTWHNSITZ TYPE STRING,
STR_ERG4 TYPE STRING,
CITY TYPE STRING,
DISTRICT TYPE STRING,
POSTL_COD1 TYPE STRING,
POSTL_COD2 TYPE STRING,
PO_BOX TYPE STRING,
STREET TYPE STRING,
HOUSE_NO TYPE STRING,
BUILDING TYPE STRING,
COUNTRY TYPE STRING,
REGION TYPE STRING,
TIME_ZONE TYPE STRING,
TAXJURCODE TYPE STRING,
GPART TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISUS_DRF_PREMISE_EXTERN_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_ISUS_DRF_PREMISE_EXTERN_STR-MANDT sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-VSTELLE sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-HAUS sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-STR_ERG2 sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-HAUS_NUM2 sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-TXTLANGU sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-LGZUSATZ sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-VBSART sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-EIGENT sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-OBJNR sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-TPLNUMMER sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-ERDAT sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-ERNAM sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-AEDAT sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-AENAM sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-BEGRU sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-LOEVM sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-ANZPERS sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-FLOOR sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-ROOMNUMBER sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-HPTWHNSITZ sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-STR_ERG4 sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-CITY sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-DISTRICT sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-POSTL_COD1 sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-POSTL_COD2 sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-PO_BOX sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-STREET sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-HOUSE_NO sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-BUILDING sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-COUNTRY sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-REGION sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-TIME_ZONE sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-TAXJURCODE sy-vline 
WA_ISUS_DRF_PREMISE_EXTERN_STR-GPART sy-vline      INTO ld_text SEPARATED BY SPACE.

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