ABAP Select data from SAP table PS0738 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PS0738 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 PS0738. 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 PS0738 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_PS0738 TYPE STANDARD TABLE OF PS0738,
      WA_PS0738 TYPE PS0738,
      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: <PS0738> TYPE PS0738.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PS0738.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PS0738
  INTO TABLE IT_PS0738.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PS0738
*  INTO TABLE @DATA(IT_PS07382).
*--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_PS0738 INDEX 1 INTO DATA(WA_PS07382).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PS0738 ASSIGNING <PS0738>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PS0738>-IONUM = 1.
<PS0738>-IADBN = 1.
<PS0738>-IARSN = 1.
<PS0738>-IAUNI = 1.
<PS0738>-IAPCT = 1.

ENDLOOP.

LOOP AT IT_PS0738 INTO WA_PS0738.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PS0738-IAAMT, sy-vline,
  WA_PS0738-IASAL, sy-vline,
  WA_PS0738-IAWTY, sy-vline,
  WA_PS0738-FLAG, sy-vline,
  WA_PS0738-PAYTY, sy-vline,
  WA_PS0738-PAYID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PS0738 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_PS0738 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_PS0738 INTO WA_PS0738.


*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_PS0738_STR, 
IONUM TYPE STRING,
IADBN TYPE STRING,
IARSN TYPE STRING,
IAUNI TYPE STRING,
IAPCT TYPE STRING,
IAAMT TYPE STRING,
IASAL TYPE STRING,
IAWTY TYPE STRING,
FLAG TYPE STRING,
PAYTY TYPE STRING,
PAYID TYPE STRING,
OCRSN TYPE STRING,
WAERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PS0738_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_PS0738_STR-IONUM sy-vline 
WA_PS0738_STR-IADBN sy-vline 
WA_PS0738_STR-IARSN sy-vline 
WA_PS0738_STR-IAUNI sy-vline 
WA_PS0738_STR-IAPCT sy-vline 
WA_PS0738_STR-IAAMT sy-vline 
WA_PS0738_STR-IASAL sy-vline 
WA_PS0738_STR-IAWTY sy-vline 
WA_PS0738_STR-FLAG sy-vline 
WA_PS0738_STR-PAYTY sy-vline 
WA_PS0738_STR-PAYID sy-vline 
WA_PS0738_STR-OCRSN sy-vline 
WA_PS0738_STR-WAERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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