ABAP Select data from SAP table MMPUR_S_PO_PKT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_S_PO_PKT
*  INTO TABLE @DATA(IT_MMPUR_S_PO_PKT2).
*--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_MMPUR_S_PO_PKT INDEX 1 INTO DATA(WA_MMPUR_S_PO_PKT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_S_PO_PKT>-PROCMTHUBPURGOBJFROM = 1.
<MMPUR_S_PO_PKT>-PROCMTHUBPURGOBJTO = 1.
<MMPUR_S_PO_PKT>-PROCMTHUBJOBMAXNMBROFPACKETS = 1.
<MMPUR_S_PO_PKT>-PROCMTHUBJOBPACKETSIZEVALUE = 1.
<MMPUR_S_PO_PKT>-PROCMTHUBPURDOCUMENTTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_S_PO_PKT-LOGICALSYSTEM, sy-vline,
  WA_MMPUR_S_PO_PKT-PROCMTHUBJOBIMPORTTYPE, sy-vline,
  WA_MMPUR_S_PO_PKT-PROCMTHUBCOMPANYCODE, sy-vline,
  WA_MMPUR_S_PO_PKT-PROCMTHUBPURCHASINGORG, sy-vline,
  WA_MMPUR_S_PO_PKT-PROCMTHUBPURCHASINGGROUP, sy-vline,
  WA_MMPUR_S_PO_PKT-PROCMTHUBPURGOBJCRTNFROMDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_S_PO_PKT 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_MMPUR_S_PO_PKT 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_MMPUR_S_PO_PKT INTO WA_MMPUR_S_PO_PKT.


*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 PROCMTHUBPURGOBJFROM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_S_PO_PKT-PROCMTHUBPURGOBJFROM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_S_PO_PKT-PROCMTHUBPURGOBJFROM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PROCMTHUBPURGOBJTO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_S_PO_PKT-PROCMTHUBPURGOBJTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_S_PO_PKT-PROCMTHUBPURGOBJTO.
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_MMPUR_S_PO_PKT_STR, 
PROCMTHUBPURGOBJFROM TYPE STRING,
PROCMTHUBPURGOBJTO TYPE STRING,
PROCMTHUBJOBMAXNMBROFPACKETS TYPE STRING,
PROCMTHUBJOBPACKETSIZEVALUE TYPE STRING,
PROCMTHUBPURDOCUMENTTYPE TYPE STRING,
LOGICALSYSTEM TYPE STRING,
PROCMTHUBJOBIMPORTTYPE TYPE STRING,
PROCMTHUBCOMPANYCODE TYPE STRING,
PROCMTHUBPURCHASINGORG TYPE STRING,
PROCMTHUBPURCHASINGGROUP TYPE STRING,
PROCMTHUBPURGOBJCRTNFROMDATE TYPE STRING,
PROCMTHUBPURGOBJCRTNTODATE TYPE STRING,
PROCMTHUBDELTAXTRCTNDTETME TYPE STRING,
PURREQNPACKETSIZE TYPE STRING,
HAS_ERROR TYPE STRING,
HTTPRESPONSESTATUSCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_S_PO_PKT_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_MMPUR_S_PO_PKT_STR-PROCMTHUBPURGOBJFROM sy-vline 
WA_MMPUR_S_PO_PKT_STR-PROCMTHUBPURGOBJTO sy-vline 
WA_MMPUR_S_PO_PKT_STR-PROCMTHUBJOBMAXNMBROFPACKETS sy-vline 
WA_MMPUR_S_PO_PKT_STR-PROCMTHUBJOBPACKETSIZEVALUE sy-vline 
WA_MMPUR_S_PO_PKT_STR-PROCMTHUBPURDOCUMENTTYPE sy-vline 
WA_MMPUR_S_PO_PKT_STR-LOGICALSYSTEM sy-vline 
WA_MMPUR_S_PO_PKT_STR-PROCMTHUBJOBIMPORTTYPE sy-vline 
WA_MMPUR_S_PO_PKT_STR-PROCMTHUBCOMPANYCODE sy-vline 
WA_MMPUR_S_PO_PKT_STR-PROCMTHUBPURCHASINGORG sy-vline 
WA_MMPUR_S_PO_PKT_STR-PROCMTHUBPURCHASINGGROUP sy-vline 
WA_MMPUR_S_PO_PKT_STR-PROCMTHUBPURGOBJCRTNFROMDATE sy-vline 
WA_MMPUR_S_PO_PKT_STR-PROCMTHUBPURGOBJCRTNTODATE sy-vline 
WA_MMPUR_S_PO_PKT_STR-PROCMTHUBDELTAXTRCTNDTETME sy-vline 
WA_MMPUR_S_PO_PKT_STR-PURREQNPACKETSIZE sy-vline 
WA_MMPUR_S_PO_PKT_STR-HAS_ERROR sy-vline 
WA_MMPUR_S_PO_PKT_STR-HTTPRESPONSESTATUSCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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