ABAP Select data from SAP table PALLOCCYCLE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PALLOCCYCLE
*  INTO TABLE @DATA(IT_PALLOCCYCLE2).
*--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_PALLOCCYCLE INDEX 1 INTO DATA(WA_PALLOCCYCLE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PALLOCCYCLE>-MANDT = 1.
<PALLOCCYCLE>-ALLOCATIONTYPE = 1.
<PALLOCCYCLE>-ALLOCATIONCYCLE = 1.
<PALLOCCYCLE>-ALLOCATIONCYCLESTARTDATE = 1.
<PALLOCCYCLE>-ALLOCATIONCYCLENAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PALLOCCYCLE-ALLOCATIONCYCLENAMETEXT, sy-vline,
  WA_PALLOCCYCLE-ALLOCACTUALPLANVARIANTTEXT, sy-vline,
  WA_PALLOCCYCLE-ALLOCATIONCONTEXTTYPETEXT, sy-vline,
  WA_PALLOCCYCLE-COMPANYCODE, sy-vline,
  WA_PALLOCCYCLE-COMPANYCODENAME, sy-vline,
  WA_PALLOCCYCLE-ALLOCATIONCOSTELEMENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PALLOCCYCLE 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_PALLOCCYCLE 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_PALLOCCYCLE INTO WA_PALLOCCYCLE.


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

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

*Conversion exit ALPHA, internal->external for field LEDGER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PALLOCCYCLE-LEDGER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PALLOCCYCLE-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_PALLOCCYCLE_STR, 
MANDT TYPE STRING,
ALLOCATIONTYPE TYPE STRING,
ALLOCATIONCYCLE TYPE STRING,
ALLOCATIONCYCLESTARTDATE TYPE STRING,
ALLOCATIONCYCLENAME TYPE STRING,
ALLOCATIONCYCLENAMETEXT TYPE STRING,
ALLOCACTUALPLANVARIANTTEXT TYPE STRING,
ALLOCATIONCONTEXTTYPETEXT TYPE STRING,
COMPANYCODE TYPE STRING,
COMPANYCODENAME TYPE STRING,
ALLOCATIONCOSTELEMENT TYPE STRING,
ALLOCATIONCYCLECATEGORY TYPE STRING,
LEDGER TYPE STRING,
LEDGERNAME TYPE STRING,
ALLOCATIONSTATUS TYPE STRING,
CRITICALITYCODE TYPE STRING,
CREATEDBYUSER TYPE STRING,
ALLOCATIONCYCLEISCONSISTENT TYPE STRING,
ALLOCCYCLEISCONSISTENTTEXT TYPE STRING,
ALLOCATIONPOSTINGTYPE TYPE STRING,
ALLOCATIONACTUALPLANVARIANT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PALLOCCYCLE_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_PALLOCCYCLE_STR-MANDT sy-vline 
WA_PALLOCCYCLE_STR-ALLOCATIONTYPE sy-vline 
WA_PALLOCCYCLE_STR-ALLOCATIONCYCLE sy-vline 
WA_PALLOCCYCLE_STR-ALLOCATIONCYCLESTARTDATE sy-vline 
WA_PALLOCCYCLE_STR-ALLOCATIONCYCLENAME sy-vline 
WA_PALLOCCYCLE_STR-ALLOCATIONCYCLENAMETEXT sy-vline 
WA_PALLOCCYCLE_STR-ALLOCACTUALPLANVARIANTTEXT sy-vline 
WA_PALLOCCYCLE_STR-ALLOCATIONCONTEXTTYPETEXT sy-vline 
WA_PALLOCCYCLE_STR-COMPANYCODE sy-vline 
WA_PALLOCCYCLE_STR-COMPANYCODENAME sy-vline 
WA_PALLOCCYCLE_STR-ALLOCATIONCOSTELEMENT sy-vline 
WA_PALLOCCYCLE_STR-ALLOCATIONCYCLECATEGORY sy-vline 
WA_PALLOCCYCLE_STR-LEDGER sy-vline 
WA_PALLOCCYCLE_STR-LEDGERNAME sy-vline 
WA_PALLOCCYCLE_STR-ALLOCATIONSTATUS sy-vline 
WA_PALLOCCYCLE_STR-CRITICALITYCODE sy-vline 
WA_PALLOCCYCLE_STR-CREATEDBYUSER sy-vline 
WA_PALLOCCYCLE_STR-ALLOCATIONCYCLEISCONSISTENT sy-vline 
WA_PALLOCCYCLE_STR-ALLOCCYCLEISCONSISTENTTEXT sy-vline 
WA_PALLOCCYCLE_STR-ALLOCATIONPOSTINGTYPE sy-vline 
WA_PALLOCCYCLE_STR-ALLOCATIONACTUALPLANVARIANT sy-vline      INTO ld_text SEPARATED BY SPACE.

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