ABAP Select data from SAP table PALLOCNRUNMSG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PALLOCNRUNMSG
*  INTO TABLE @DATA(IT_PALLOCNRUNMSG2).
*--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_PALLOCNRUNMSG INDEX 1 INTO DATA(WA_PALLOCNRUNMSG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PALLOCNRUNMSG>-MANDT = 1.
<PALLOCNRUNMSG>-UNIVERSALALLOCATIONRUN = 1.
<PALLOCNRUNMSG>-ALLOCATIONRUNMESSAGEITEM = 1.
<PALLOCNRUNMSG>-SYSTEMMESSAGETYPE = 1.
<PALLOCNRUNMSG>-CRITICALITYCODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PALLOCNRUNMSG-SYSTEMMESSAGECLASS, sy-vline,
  WA_PALLOCNRUNMSG-SYSTEMMESSAGENUMBER, sy-vline,
  WA_PALLOCNRUNMSG-SYSTEMMESSAGEVARIABLE1, sy-vline,
  WA_PALLOCNRUNMSG-SYSTEMMESSAGEVARIABLE2, sy-vline,
  WA_PALLOCNRUNMSG-SYSTEMMESSAGEVARIABLE3, sy-vline,
  WA_PALLOCNRUNMSG-SYSTEMMESSAGEVARIABLE4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PALLOCNRUNMSG 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_PALLOCNRUNMSG 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_PALLOCNRUNMSG INTO WA_PALLOCNRUNMSG.


*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 LEDGER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PALLOCNRUNMSG-LEDGER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PALLOCNRUNMSG-LEDGER.
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_PALLOCNRUNMSG_STR, 
MANDT TYPE STRING,
UNIVERSALALLOCATIONRUN TYPE STRING,
ALLOCATIONRUNMESSAGEITEM TYPE STRING,
SYSTEMMESSAGETYPE TYPE STRING,
CRITICALITYCODE TYPE STRING,
SYSTEMMESSAGECLASS TYPE STRING,
SYSTEMMESSAGENUMBER TYPE STRING,
SYSTEMMESSAGEVARIABLE1 TYPE STRING,
SYSTEMMESSAGEVARIABLE2 TYPE STRING,
SYSTEMMESSAGEVARIABLE3 TYPE STRING,
SYSTEMMESSAGEVARIABLE4 TYPE STRING,
ALLOCATIONTYPE TYPE STRING,
LEDGER TYPE STRING,
ALLOCATIONACTUALPLANVARIANT TYPE STRING,
ALLOCATIONPOSTINGTYPE TYPE STRING,
SYSTEMMESSAGETEXT TYPE STRING,
ALLOCRUNMESSAGEHASLONGTEXT TYPE STRING,
SYSTEMMESSAGETYPENAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PALLOCNRUNMSG_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_PALLOCNRUNMSG_STR-MANDT sy-vline 
WA_PALLOCNRUNMSG_STR-UNIVERSALALLOCATIONRUN sy-vline 
WA_PALLOCNRUNMSG_STR-ALLOCATIONRUNMESSAGEITEM sy-vline 
WA_PALLOCNRUNMSG_STR-SYSTEMMESSAGETYPE sy-vline 
WA_PALLOCNRUNMSG_STR-CRITICALITYCODE sy-vline 
WA_PALLOCNRUNMSG_STR-SYSTEMMESSAGECLASS sy-vline 
WA_PALLOCNRUNMSG_STR-SYSTEMMESSAGENUMBER sy-vline 
WA_PALLOCNRUNMSG_STR-SYSTEMMESSAGEVARIABLE1 sy-vline 
WA_PALLOCNRUNMSG_STR-SYSTEMMESSAGEVARIABLE2 sy-vline 
WA_PALLOCNRUNMSG_STR-SYSTEMMESSAGEVARIABLE3 sy-vline 
WA_PALLOCNRUNMSG_STR-SYSTEMMESSAGEVARIABLE4 sy-vline 
WA_PALLOCNRUNMSG_STR-ALLOCATIONTYPE sy-vline 
WA_PALLOCNRUNMSG_STR-LEDGER sy-vline 
WA_PALLOCNRUNMSG_STR-ALLOCATIONACTUALPLANVARIANT sy-vline 
WA_PALLOCNRUNMSG_STR-ALLOCATIONPOSTINGTYPE sy-vline 
WA_PALLOCNRUNMSG_STR-SYSTEMMESSAGETEXT sy-vline 
WA_PALLOCNRUNMSG_STR-ALLOCRUNMESSAGEHASLONGTEXT sy-vline 
WA_PALLOCNRUNMSG_STR-SYSTEMMESSAGETYPENAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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