ABAP Select data from SAP table PRU_KLADR_SCREEN_GEN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PRU_KLADR_SCREEN_GEN
*  INTO TABLE @DATA(IT_PRU_KLADR_SCREEN_GEN2).
*--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_PRU_KLADR_SCREEN_GEN INDEX 1 INTO DATA(WA_PRU_KLADR_SCREEN_GEN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PRU_KLADR_SCREEN_GEN>-KLAND1 = 1.
<PRU_KLADR_SCREEN_GEN>-KREGIO = 1.
<PRU_KLADR_SCREEN_GEN>-KCOUNC = 1.
<PRU_KLADR_SCREEN_GEN>-KINDEX = 1.
<PRU_KLADR_SCREEN_GEN>-KCODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PRU_KLADR_SCREEN_GEN-KCODE_CITY, sy-vline,
  WA_PRU_KLADR_SCREEN_GEN-KNAME_CITY, sy-vline,
  WA_PRU_KLADR_SCREEN_GEN-KSOCR_CITY, sy-vline,
  WA_PRU_KLADR_SCREEN_GEN-KCODE_NP, sy-vline,
  WA_PRU_KLADR_SCREEN_GEN-KNAME_NP, sy-vline,
  WA_PRU_KLADR_SCREEN_GEN-KSOCR_NP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PRU_KLADR_SCREEN_GEN 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_PRU_KLADR_SCREEN_GEN 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_PRU_KLADR_SCREEN_GEN INTO WA_PRU_KLADR_SCREEN_GEN.


*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_PRU_KLADR_SCREEN_GEN_STR, 
KLAND1 TYPE STRING,
KREGIO TYPE STRING,
KCOUNC TYPE STRING,
KINDEX TYPE STRING,
KCODE TYPE STRING,
KCODE_CITY TYPE STRING,
KNAME_CITY TYPE STRING,
KSOCR_CITY TYPE STRING,
KCODE_NP TYPE STRING,
KNAME_NP TYPE STRING,
KSOCR_NP TYPE STRING,
KCODE_STREET TYPE STRING,
KNAME_STREET TYPE STRING,
KSOCR_STREET TYPE STRING,
KNAME_HOUSE TYPE STRING,
KNAME_BLDNG TYPE STRING,
S_CITY TYPE STRING,
S_NP TYPE STRING,
S_STREET TYPE STRING,
CRTAC TYPE STRING,
GNINMB TYPE STRING,
KSOCR_COUNC TYPE STRING,
KSOCR_REGION TYPE STRING,
PLANCODE TYPE STRING,
PLANSOCR TYPE STRING,
PLANNAME TYPE STRING,
REGIONNAME TYPE STRING,
AREANAME TYPE STRING,
AOGUID TYPE STRING,
STRUCNUM TYPE STRING,
ESTSTATID TYPE STRING,
ESTSTATNAME TYPE STRING,
STRSTATID TYPE STRING,
STRSTATNAME TYPE STRING,
ENDDATE TYPE STRING,
BEGDATE TYPE STRING,
ADDRESSVALIDITY TYPE STRING,
CHECK_MODE TYPE STRING,
S_BLDNG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PRU_KLADR_SCREEN_GEN_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_PRU_KLADR_SCREEN_GEN_STR-KLAND1 sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-KREGIO sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-KCOUNC sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-KINDEX sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-KCODE sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-KCODE_CITY sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-KNAME_CITY sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-KSOCR_CITY sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-KCODE_NP sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-KNAME_NP sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-KSOCR_NP sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-KCODE_STREET sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-KNAME_STREET sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-KSOCR_STREET sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-KNAME_HOUSE sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-KNAME_BLDNG sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-S_CITY sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-S_NP sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-S_STREET sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-CRTAC sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-GNINMB sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-KSOCR_COUNC sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-KSOCR_REGION sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-PLANCODE sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-PLANSOCR sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-PLANNAME sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-REGIONNAME sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-AREANAME sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-AOGUID sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-STRUCNUM sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-ESTSTATID sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-ESTSTATNAME sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-STRSTATID sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-STRSTATNAME sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-ENDDATE sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-BEGDATE sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-ADDRESSVALIDITY sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-CHECK_MODE sy-vline 
WA_PRU_KLADR_SCREEN_GEN_STR-S_BLDNG sy-vline      INTO ld_text SEPARATED BY SPACE.

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