ABAP Select data from SAP table SMY_PCMP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SMY_PCMP
*  INTO TABLE @DATA(IT_SMY_PCMP2).
*--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_SMY_PCMP INDEX 1 INTO DATA(WA_SMY_PCMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SMY_PCMP>-HDRROWUUID = 1.
<SMY_PCMP>-ROWUUID = 1.
<SMY_PCMP>-PCMUUID = 1.
<SMY_PCMP>-ORDERUUID = 1.
<SMY_PCMP>-PCMNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SMY_PCMP-PCMID, sy-vline,
  WA_SMY_PCMP-AUFNR, sy-vline,
  WA_SMY_PCMP-ORDERGUID, sy-vline,
  WA_SMY_PCMP-AUFTYP, sy-vline,
  WA_SMY_PCMP-PCMPOS, sy-vline,
  WA_SMY_PCMP-METHOD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SMY_PCMP 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_SMY_PCMP 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_SMY_PCMP INTO WA_SMY_PCMP.


*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.

*Conversion exit ALPHA, internal->external for field PCMNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SMY_PCMP-PCMNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SMY_PCMP-PCMNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SMY_PCMP-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SMY_PCMP-AUFNR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_SMY_PCMP_STR, 
HDRROWUUID TYPE STRING,
ROWUUID TYPE STRING,
PCMUUID TYPE STRING,
ORDERUUID TYPE STRING,
PCMNR TYPE STRING,
PCMID TYPE STRING,
AUFNR TYPE STRING,
ORDERGUID TYPE STRING,
AUFTYP TYPE STRING,
PCMPOS TYPE STRING,
METHOD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SMY_PCMP_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_SMY_PCMP_STR-HDRROWUUID sy-vline 
WA_SMY_PCMP_STR-ROWUUID sy-vline 
WA_SMY_PCMP_STR-PCMUUID sy-vline 
WA_SMY_PCMP_STR-ORDERUUID sy-vline 
WA_SMY_PCMP_STR-PCMNR sy-vline 
WA_SMY_PCMP_STR-PCMID sy-vline 
WA_SMY_PCMP_STR-AUFNR sy-vline 
WA_SMY_PCMP_STR-ORDERGUID sy-vline 
WA_SMY_PCMP_STR-AUFTYP sy-vline 
WA_SMY_PCMP_STR-PCMPOS sy-vline 
WA_SMY_PCMP_STR-METHOD sy-vline      INTO ld_text SEPARATED BY SPACE.

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