ABAP Select data from SAP table PC27R into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC27R 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 PC27R. 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 PC27R 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_PC27R TYPE STANDARD TABLE OF PC27R,
      WA_PC27R TYPE PC27R,
      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: <PC27R> TYPE PC27R.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC27R.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC27R
  INTO TABLE IT_PC27R.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC27R
*  INTO TABLE @DATA(IT_PC27R2).
*--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_PC27R INDEX 1 INTO DATA(WA_PC27R2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC27R ASSIGNING <PC27R>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC27R>-BEGDA = 1.
<PC27R>-ENDDA = 1.
<PC27R>-SCHID = 1.
<PC27R>-PCTEE = 1.
<PC27R>-PCTER = 1.

ENDLOOP.

LOOP AT IT_PC27R INTO WA_PC27R.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC27R-EEANN, sy-vline,
  WA_PC27R-ERANN, sy-vline,
  WA_PC27R-PCEES, sy-vline,
  WA_PC27R-PCERS, sy-vline,
  WA_PC27R-EEPER, sy-vline,
  WA_PC27R-ERPER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC27R 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_PC27R 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_PC27R INTO WA_PC27R.


*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_PC27R_STR, 
BEGDA TYPE STRING,
ENDDA TYPE STRING,
SCHID TYPE STRING,
PCTEE TYPE STRING,
PCTER TYPE STRING,
EEANN TYPE STRING,
ERANN TYPE STRING,
PCEES TYPE STRING,
PCERS TYPE STRING,
EEPER TYPE STRING,
ERPER TYPE STRING,
AVCAN TYPE STRING,
AVCPE TYPE STRING,
PNBDA TYPE STRING,
PNEDA TYPE STRING,
SCONE TYPE STRING,
SCONR TYPE STRING,
PEREE TYPE STRING,
PERER TYPE STRING,
WAERS TYPE STRING,
WTYPE TYPE STRING,
WTYPR TYPE STRING,
WTYPA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC27R_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_PC27R_STR-BEGDA sy-vline 
WA_PC27R_STR-ENDDA sy-vline 
WA_PC27R_STR-SCHID sy-vline 
WA_PC27R_STR-PCTEE sy-vline 
WA_PC27R_STR-PCTER sy-vline 
WA_PC27R_STR-EEANN sy-vline 
WA_PC27R_STR-ERANN sy-vline 
WA_PC27R_STR-PCEES sy-vline 
WA_PC27R_STR-PCERS sy-vline 
WA_PC27R_STR-EEPER sy-vline 
WA_PC27R_STR-ERPER sy-vline 
WA_PC27R_STR-AVCAN sy-vline 
WA_PC27R_STR-AVCPE sy-vline 
WA_PC27R_STR-PNBDA sy-vline 
WA_PC27R_STR-PNEDA sy-vline 
WA_PC27R_STR-SCONE sy-vline 
WA_PC27R_STR-SCONR sy-vline 
WA_PC27R_STR-PEREE sy-vline 
WA_PC27R_STR-PERER sy-vline 
WA_PC27R_STR-WAERS sy-vline 
WA_PC27R_STR-WTYPE sy-vline 
WA_PC27R_STR-WTYPR sy-vline 
WA_PC27R_STR-WTYPA sy-vline      INTO ld_text SEPARATED BY SPACE.

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