ABAP Select data from SAP table PWSDAYINT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PWSDAYINT
*  INTO TABLE @DATA(IT_PWSDAYINT2).
*--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_PWSDAYINT INDEX 1 INTO DATA(WA_PWSDAYINT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PWSDAYINT>-DATUM = 1.
<PWSDAYINT>-MOTPR = 1.
<PWSDAYINT>-TPROG = 1.
<PWSDAYINT>-VARIA = 1.
<PWSDAYINT>-BEGUZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PWSDAYINT-ENDUZ, sy-vline,
  WA_PWSDAYINT-INTYP, sy-vline,
  WA_PWSDAYINT-VTKEN, sy-vline,
  WA_PWSDAYINT-PDBEZ, sy-vline,
  WA_PWSDAYINT-PDUNB, sy-vline,
  WA_PWSDAYINT-STDAZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PWSDAYINT 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_PWSDAYINT 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_PWSDAYINT INTO WA_PWSDAYINT.


*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_PWSDAYINT_STR, 
DATUM TYPE STRING,
MOTPR TYPE STRING,
TPROG TYPE STRING,
VARIA TYPE STRING,
BEGUZ TYPE STRING,
ENDUZ TYPE STRING,
INTYP TYPE STRING,
VTKEN TYPE STRING,
PDBEZ TYPE STRING,
PDUNB TYPE STRING,
STDAZ TYPE STRING,
PTYP1 TYPE STRING,
PTYP2 TYPE STRING,
PNORM TYPE STRING,
START_BEF_ZERO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PWSDAYINT_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_PWSDAYINT_STR-DATUM sy-vline 
WA_PWSDAYINT_STR-MOTPR sy-vline 
WA_PWSDAYINT_STR-TPROG sy-vline 
WA_PWSDAYINT_STR-VARIA sy-vline 
WA_PWSDAYINT_STR-BEGUZ sy-vline 
WA_PWSDAYINT_STR-ENDUZ sy-vline 
WA_PWSDAYINT_STR-INTYP sy-vline 
WA_PWSDAYINT_STR-VTKEN sy-vline 
WA_PWSDAYINT_STR-PDBEZ sy-vline 
WA_PWSDAYINT_STR-PDUNB sy-vline 
WA_PWSDAYINT_STR-STDAZ sy-vline 
WA_PWSDAYINT_STR-PTYP1 sy-vline 
WA_PWSDAYINT_STR-PTYP2 sy-vline 
WA_PWSDAYINT_STR-PNORM sy-vline 
WA_PWSDAYINT_STR-START_BEF_ZERO sy-vline      INTO ld_text SEPARATED BY SPACE.

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