ABAP Select data from SAP table CALLOCCYCLEFIELD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CALLOCCYCLEFIELD
*  INTO TABLE @DATA(IT_CALLOCCYCLEFIELD2).
*--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_CALLOCCYCLEFIELD INDEX 1 INTO DATA(WA_CALLOCCYCLEFIELD2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CALLOCCYCLEFIELD-ALLOCDOCUMENTSEQUENCENUMBER, sy-vline,
  WA_CALLOCCYCLEFIELD-ALLOCATIONFIELDNAME, sy-vline,
  WA_CALLOCCYCLEFIELD-ALLOCATIONSETNAME, sy-vline,
  WA_CALLOCCYCLEFIELD-ALLOCATIONFIELDMINIMUMVALUE, sy-vline,
  WA_CALLOCCYCLEFIELD-ALLOCATIONFIELDMAXIMUMVALUE, sy-vline,
  WA_CALLOCCYCLEFIELD-ALLOCATIONSETID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CALLOCCYCLEFIELD 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_CALLOCCYCLEFIELD 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_CALLOCCYCLEFIELD INTO WA_CALLOCCYCLEFIELD.


*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.
ENDFORM. 

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

TYPES: BEGIN OF T_CALLOCCYCLEFIELD_STR, 
MANDT TYPE STRING,
ALLOCATIONTYPE TYPE STRING,
ALLOCATIONCYCLE TYPE STRING,
ALLOCATIONCYCLESTARTDATE TYPE STRING,
ALLOCATIONCYCLESEGMENT TYPE STRING,
ALLOCDOCUMENTSEQUENCENUMBER TYPE STRING,
ALLOCATIONFIELDNAME TYPE STRING,
ALLOCATIONSETNAME TYPE STRING,
ALLOCATIONFIELDMINIMUMVALUE TYPE STRING,
ALLOCATIONFIELDMAXIMUMVALUE TYPE STRING,
ALLOCATIONSETID TYPE STRING,
ALLOCATIONFIELDTEXT TYPE STRING,
ALLOCATIONSETTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CALLOCCYCLEFIELD_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_CALLOCCYCLEFIELD_STR-MANDT sy-vline 
WA_CALLOCCYCLEFIELD_STR-ALLOCATIONTYPE sy-vline 
WA_CALLOCCYCLEFIELD_STR-ALLOCATIONCYCLE sy-vline 
WA_CALLOCCYCLEFIELD_STR-ALLOCATIONCYCLESTARTDATE sy-vline 
WA_CALLOCCYCLEFIELD_STR-ALLOCATIONCYCLESEGMENT sy-vline 
WA_CALLOCCYCLEFIELD_STR-ALLOCDOCUMENTSEQUENCENUMBER sy-vline 
WA_CALLOCCYCLEFIELD_STR-ALLOCATIONFIELDNAME sy-vline 
WA_CALLOCCYCLEFIELD_STR-ALLOCATIONSETNAME sy-vline 
WA_CALLOCCYCLEFIELD_STR-ALLOCATIONFIELDMINIMUMVALUE sy-vline 
WA_CALLOCCYCLEFIELD_STR-ALLOCATIONFIELDMAXIMUMVALUE sy-vline 
WA_CALLOCCYCLEFIELD_STR-ALLOCATIONSETID sy-vline 
WA_CALLOCCYCLEFIELD_STR-ALLOCATIONFIELDTEXT sy-vline 
WA_CALLOCCYCLEFIELD_STR-ALLOCATIONSETTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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