ABAP Select data from SAP table P18_HZUPN_2020 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P18_HZUPN_2020 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 P18_HZUPN_2020. 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 P18_HZUPN_2020 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_P18_HZUPN_2020 TYPE STANDARD TABLE OF P18_HZUPN_2020,
      WA_P18_HZUPN_2020 TYPE P18_HZUPN_2020,
      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: <P18_HZUPN_2020> TYPE P18_HZUPN_2020.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P18_HZUPN_2020.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P18_HZUPN_2020
  INTO TABLE IT_P18_HZUPN_2020.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P18_HZUPN_2020
*  INTO TABLE @DATA(IT_P18_HZUPN_20202).
*--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_P18_HZUPN_2020 INDEX 1 INTO DATA(WA_P18_HZUPN_20202).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P18_HZUPN_2020 ASSIGNING <P18_HZUPN_2020>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P18_HZUPN_2020>-PERNR = 1.
<P18_HZUPN_2020>-BATYP = 1.
<P18_HZUPN_2020>-CERID = 1.
<P18_HZUPN_2020>-BEGDA = 1.
<P18_HZUPN_2020>-ENDDA = 1.

ENDLOOP.

LOOP AT IT_P18_HZUPN_2020 INTO WA_P18_HZUPN_2020.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P18_HZUPN_2020-CTYPE, sy-vline,
  WA_P18_HZUPN_2020-CTRAN, sy-vline,
  WA_P18_HZUPN_2020-CSTAT, sy-vline,
  WA_P18_HZUPN_2020-HISTO, sy-vline,
  WA_P18_HZUPN_2020-AEDTM, sy-vline,
  WA_P18_HZUPN_2020-SEKEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P18_HZUPN_2020 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_P18_HZUPN_2020 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_P18_HZUPN_2020 INTO WA_P18_HZUPN_2020.


*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_P18_HZUPN_2020_STR, 
PERNR TYPE STRING,
BATYP TYPE STRING,
CERID TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
CTYPE TYPE STRING,
CTRAN TYPE STRING,
CSTAT TYPE STRING,
HISTO TYPE STRING,
AEDTM TYPE STRING,
SEKEY TYPE STRING,
UNAME TYPE STRING,
REPID TYPE STRING,
DOKUMENT TYPE STRING,
CISLOPOTVRZENI TYPE STRING,
KODOSSZ TYPE STRING,
NAZEVOSSZ TYPE STRING,
DATUMVYSTAVENI TYPE STRING,
OPRAVNEPODANI TYPE STRING,
POJISTENEC TYPE STRING,
JMENO TYPE STRING,
PRIJMENI TYPE STRING,
TITUL TYPE STRING,
RODNECISLO TYPE STRING,
DATUMNAR TYPE STRING,
ZAMESTNANI TYPE STRING,
NAZEVZAMESTNAVATEL TYPE STRING,
ICZAMESTNAVATEL TYPE STRING,
VSZAMESTNAVATEL TYPE STRING,
POTVRZENIZAMESTNAVATELE TYPE STRING,
NAVRATDOPRACE TYPE STRING,
DUVODNAVRATDOPRACE TYPE STRING,
DATUMNAVRATDOPRACE TYPE STRING,
ODPRHODINYPOSLDEN TYPE STRING,
PRACDOBAPOSLDEN TYPE STRING,
PRACEVEDNECH TYPE STRING,
WRK_INT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P18_HZUPN_2020_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_P18_HZUPN_2020_STR-PERNR sy-vline 
WA_P18_HZUPN_2020_STR-BATYP sy-vline 
WA_P18_HZUPN_2020_STR-CERID sy-vline 
WA_P18_HZUPN_2020_STR-BEGDA sy-vline 
WA_P18_HZUPN_2020_STR-ENDDA sy-vline 
WA_P18_HZUPN_2020_STR-CTYPE sy-vline 
WA_P18_HZUPN_2020_STR-CTRAN sy-vline 
WA_P18_HZUPN_2020_STR-CSTAT sy-vline 
WA_P18_HZUPN_2020_STR-HISTO sy-vline 
WA_P18_HZUPN_2020_STR-AEDTM sy-vline 
WA_P18_HZUPN_2020_STR-SEKEY sy-vline 
WA_P18_HZUPN_2020_STR-UNAME sy-vline 
WA_P18_HZUPN_2020_STR-REPID sy-vline 
WA_P18_HZUPN_2020_STR-DOKUMENT sy-vline 
WA_P18_HZUPN_2020_STR-CISLOPOTVRZENI sy-vline 
WA_P18_HZUPN_2020_STR-KODOSSZ sy-vline 
WA_P18_HZUPN_2020_STR-NAZEVOSSZ sy-vline 
WA_P18_HZUPN_2020_STR-DATUMVYSTAVENI sy-vline 
WA_P18_HZUPN_2020_STR-OPRAVNEPODANI sy-vline 
WA_P18_HZUPN_2020_STR-POJISTENEC sy-vline 
WA_P18_HZUPN_2020_STR-JMENO sy-vline 
WA_P18_HZUPN_2020_STR-PRIJMENI sy-vline 
WA_P18_HZUPN_2020_STR-TITUL sy-vline 
WA_P18_HZUPN_2020_STR-RODNECISLO sy-vline 
WA_P18_HZUPN_2020_STR-DATUMNAR sy-vline 
WA_P18_HZUPN_2020_STR-ZAMESTNANI sy-vline 
WA_P18_HZUPN_2020_STR-NAZEVZAMESTNAVATEL sy-vline 
WA_P18_HZUPN_2020_STR-ICZAMESTNAVATEL sy-vline 
WA_P18_HZUPN_2020_STR-VSZAMESTNAVATEL sy-vline 
WA_P18_HZUPN_2020_STR-POTVRZENIZAMESTNAVATELE sy-vline 
WA_P18_HZUPN_2020_STR-NAVRATDOPRACE sy-vline 
WA_P18_HZUPN_2020_STR-DUVODNAVRATDOPRACE sy-vline 
WA_P18_HZUPN_2020_STR-DATUMNAVRATDOPRACE sy-vline 
WA_P18_HZUPN_2020_STR-ODPRHODINYPOSLDEN sy-vline 
WA_P18_HZUPN_2020_STR-PRACDOBAPOSLDEN sy-vline 
WA_P18_HZUPN_2020_STR-PRACEVEDNECH sy-vline 
WA_P18_HZUPN_2020_STR-WRK_INT sy-vline      INTO ld_text SEPARATED BY SPACE.

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