ABAP Select data from SAP table PSCREDITOR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSCREDITOR
*  INTO TABLE @DATA(IT_PSCREDITOR2).
*--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_PSCREDITOR INDEX 1 INTO DATA(WA_PSCREDITOR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSCREDITOR>-GLFIR = 1.
<PSCREDITOR>-GLBAT = 1.
<PSCREDITOR>-GLANR = 1.
<PSCREDITOR>-GLTIT = 1.
<PSCREDITOR>-GLVOR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSCREDITOR-GLNAM, sy-vline,
  WA_PSCREDITOR-GLSTR, sy-vline,
  WA_PSCREDITOR-GLLND, sy-vline,
  WA_PSCREDITOR-GLPLZ, sy-vline,
  WA_PSCREDITOR-GLORT, sy-vline,
  WA_PSCREDITOR-GLTEL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PSCREDITOR 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_PSCREDITOR 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_PSCREDITOR INTO WA_PSCREDITOR.


*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_PSCREDITOR_STR, 
GLFIR TYPE STRING,
GLBAT TYPE STRING,
GLANR TYPE STRING,
GLTIT TYPE STRING,
GLVOR TYPE STRING,
GLNAM TYPE STRING,
GLSTR TYPE STRING,
GLLND TYPE STRING,
GLPLZ TYPE STRING,
GLORT TYPE STRING,
GLTEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSCREDITOR_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_PSCREDITOR_STR-GLFIR sy-vline 
WA_PSCREDITOR_STR-GLBAT sy-vline 
WA_PSCREDITOR_STR-GLANR sy-vline 
WA_PSCREDITOR_STR-GLTIT sy-vline 
WA_PSCREDITOR_STR-GLVOR sy-vline 
WA_PSCREDITOR_STR-GLNAM sy-vline 
WA_PSCREDITOR_STR-GLSTR sy-vline 
WA_PSCREDITOR_STR-GLLND sy-vline 
WA_PSCREDITOR_STR-GLPLZ sy-vline 
WA_PSCREDITOR_STR-GLORT sy-vline 
WA_PSCREDITOR_STR-GLTEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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