ABAP Select data from SAP table PS3317 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PS3317 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 PS3317. 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 PS3317 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_PS3317 TYPE STANDARD TABLE OF PS3317,
      WA_PS3317 TYPE PS3317,
      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: <PS3317> TYPE PS3317.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PS3317.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PS3317
  INTO TABLE IT_PS3317.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PS3317
*  INTO TABLE @DATA(IT_PS33172).
*--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_PS3317 INDEX 1 INTO DATA(WA_PS33172).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PS3317 ASSIGNING <PS3317>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PS3317>-DOCSB = 1.
<PS3317>-LGART = 1.
<PS3317>-DOCTY = 1.
<PS3317>-BETRG = 1.
<PS3317>-WAERS = 1.

ENDLOOP.

LOOP AT IT_PS3317 INTO WA_PS3317.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PS3317-ESTDT, sy-vline,
  WA_PS3317-PRNR0, sy-vline,
  WA_PS3317-INVON, sy-vline,
  WA_PS3317-REMAK, sy-vline,
  WA_PS3317-DOCNO, sy-vline,
  WA_PS3317-RCVDT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PS3317 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_PS3317 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_PS3317 INTO WA_PS3317.


*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_PS3317_STR, 
DOCSB TYPE STRING,
LGART TYPE STRING,
DOCTY TYPE STRING,
BETRG TYPE STRING,
WAERS TYPE STRING,
ESTDT TYPE STRING,
PRNR0 TYPE STRING,
INVON TYPE STRING,
REMAK TYPE STRING,
DOCNO TYPE STRING,
RCVDT TYPE STRING,
RCVID TYPE STRING,
SETTL TYPE STRING,
SETTW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PS3317_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_PS3317_STR-DOCSB sy-vline 
WA_PS3317_STR-LGART sy-vline 
WA_PS3317_STR-DOCTY sy-vline 
WA_PS3317_STR-BETRG sy-vline 
WA_PS3317_STR-WAERS sy-vline 
WA_PS3317_STR-ESTDT sy-vline 
WA_PS3317_STR-PRNR0 sy-vline 
WA_PS3317_STR-INVON sy-vline 
WA_PS3317_STR-REMAK sy-vline 
WA_PS3317_STR-DOCNO sy-vline 
WA_PS3317_STR-RCVDT sy-vline 
WA_PS3317_STR-RCVID sy-vline 
WA_PS3317_STR-SETTL sy-vline 
WA_PS3317_STR-SETTW sy-vline      INTO ld_text SEPARATED BY SPACE.

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