ABAP Select data from SAP table POPO_COM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM POPO_COM
*  INTO TABLE @DATA(IT_POPO_COM2).
*--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_POPO_COM INDEX 1 INTO DATA(WA_POPO_COM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<POPO_COM>-PACKNR = 1.
<POPO_COM>-PACKZ = 1.
<POPO_COM>-PACKITEM = 1.
<POPO_COM>-PAITEMTYPE = 1.
<POPO_COM>-DETAIL_ITEMTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_POPO_COM-GEN_CONTENT, sy-vline,
  WA_POPO_COM-MATNR, sy-vline,
  WA_POPO_COM-CLASS, sy-vline,
  WA_POPO_COM-SUBPACKNR, sy-vline,
  WA_POPO_COM-TRGQTY, sy-vline,
  WA_POPO_COM-MINQTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_POPO_COM 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_POPO_COM 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_POPO_COM INTO WA_POPO_COM.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_POPO_COM-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_POPO_COM-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNITQTY
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_POPO_COM-UNITQTY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_POPO_COM-UNITQTY.
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_POPO_COM_STR, 
PACKNR TYPE STRING,
PACKZ TYPE STRING,
PACKITEM TYPE STRING,
PAITEMTYPE TYPE STRING,
DETAIL_ITEMTYPE TYPE STRING,
GEN_CONTENT TYPE STRING,
MATNR TYPE STRING,
CLASS TYPE STRING,
SUBPACKNR TYPE STRING,
TRGQTY TYPE STRING,
MINQTY TYPE STRING,
RNDQTY TYPE STRING,
UNITQTY TYPE STRING,
INDMIX TYPE STRING,
INDMAPACO TYPE STRING,
INDFILLUP TYPE STRING,
INDNRELFU TYPE STRING,
XCOORD TYPE STRING,
YCOORD TYPE STRING,
ZCOORD TYPE STRING,
GRPID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_POPO_COM_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_POPO_COM_STR-PACKNR sy-vline 
WA_POPO_COM_STR-PACKZ sy-vline 
WA_POPO_COM_STR-PACKITEM sy-vline 
WA_POPO_COM_STR-PAITEMTYPE sy-vline 
WA_POPO_COM_STR-DETAIL_ITEMTYPE sy-vline 
WA_POPO_COM_STR-GEN_CONTENT sy-vline 
WA_POPO_COM_STR-MATNR sy-vline 
WA_POPO_COM_STR-CLASS sy-vline 
WA_POPO_COM_STR-SUBPACKNR sy-vline 
WA_POPO_COM_STR-TRGQTY sy-vline 
WA_POPO_COM_STR-MINQTY sy-vline 
WA_POPO_COM_STR-RNDQTY sy-vline 
WA_POPO_COM_STR-UNITQTY sy-vline 
WA_POPO_COM_STR-INDMIX sy-vline 
WA_POPO_COM_STR-INDMAPACO sy-vline 
WA_POPO_COM_STR-INDFILLUP sy-vline 
WA_POPO_COM_STR-INDNRELFU sy-vline 
WA_POPO_COM_STR-XCOORD sy-vline 
WA_POPO_COM_STR-YCOORD sy-vline 
WA_POPO_COM_STR-ZCOORD sy-vline 
WA_POPO_COM_STR-GRPID sy-vline      INTO ld_text SEPARATED BY SPACE.

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