ABAP Select data from SAP table PCACOLLVOLUME into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PCACOLLVOLUME
*  INTO TABLE @DATA(IT_PCACOLLVOLUME2).
*--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_PCACOLLVOLUME INDEX 1 INTO DATA(WA_PCACOLLVOLUME2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PCACOLLVOLUME>-MANDT = 1.
<PCACOLLVOLUME>-CAMASSRUNDATE = 1.
<PCACOLLVOLUME>-CAMASSRUNID = 1.
<PCACOLLVOLUME>-BUSINESSPARTNER = 1.
<PCACOLLVOLUME>-CONTRACTACCOUNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PCACOLLVOLUME-CADUNNINGCOUNTER, sy-vline,
  WA_PCACOLLVOLUME-CASTANDARDCOMPANYCODE, sy-vline,
  WA_PCACOLLVOLUME-COMPANYCODENAME, sy-vline,
  WA_PCACOLLVOLUME-BUSINESSAREA, sy-vline,
  WA_PCACOLLVOLUME-DIVISION, sy-vline,
  WA_PCACOLLVOLUME-CAISSUEDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PCACOLLVOLUME 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_PCACOLLVOLUME 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_PCACOLLVOLUME INTO WA_PCACOLLVOLUME.


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

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

*Conversion exit ALPHA, internal->external for field SEGMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PCACOLLVOLUME-SEGMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PCACOLLVOLUME-SEGMENT.
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_PCACOLLVOLUME_STR, 
MANDT TYPE STRING,
CAMASSRUNDATE TYPE STRING,
CAMASSRUNID TYPE STRING,
BUSINESSPARTNER TYPE STRING,
CONTRACTACCOUNT TYPE STRING,
CADUNNINGCOUNTER TYPE STRING,
CASTANDARDCOMPANYCODE TYPE STRING,
COMPANYCODENAME TYPE STRING,
BUSINESSAREA TYPE STRING,
DIVISION TYPE STRING,
CAISSUEDATE TYPE STRING,
CACOLLECTIONSTRATEGY TYPE STRING,
CACOLLECTIONSTRATEGYNAME TYPE STRING,
CACOLLECTIONSTEP TYPE STRING,
CACOLLECTIONSTEPNAME TYPE STRING,
TRANSACTIONCURRENCY TYPE STRING,
CADUNNINGBALANCE TYPE STRING,
CADUNNINGCHARGEAMOUNT TYPE STRING,
CADUNNINGINTERESTAMOUNT TYPE STRING,
CADUNNINGAMOUNT TYPE STRING,
CACLEARINGSTATUS TYPE STRING,
SEGMENT TYPE STRING,
SEGMENTNAME TYPE STRING,
CADOCUMENTTYPE TYPE STRING,
CAACCOUNTDETERMINATIONCODE TYPE STRING,
CAMAINTRANSACTION TYPE STRING,
CASUBTRANSACTION TYPE STRING,
CASTATISTICALITEMCODE TYPE STRING,
FIRSTNAME TYPE STRING,
LASTNAME TYPE STRING,
POSTALCODE TYPE STRING,
CONTRACTACCOUNTCATEGORY TYPE STRING,
EXCHANGERATEDATE TYPE STRING,
CAAUTHORIZATIONGROUP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PCACOLLVOLUME_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_PCACOLLVOLUME_STR-MANDT sy-vline 
WA_PCACOLLVOLUME_STR-CAMASSRUNDATE sy-vline 
WA_PCACOLLVOLUME_STR-CAMASSRUNID sy-vline 
WA_PCACOLLVOLUME_STR-BUSINESSPARTNER sy-vline 
WA_PCACOLLVOLUME_STR-CONTRACTACCOUNT sy-vline 
WA_PCACOLLVOLUME_STR-CADUNNINGCOUNTER sy-vline 
WA_PCACOLLVOLUME_STR-CASTANDARDCOMPANYCODE sy-vline 
WA_PCACOLLVOLUME_STR-COMPANYCODENAME sy-vline 
WA_PCACOLLVOLUME_STR-BUSINESSAREA sy-vline 
WA_PCACOLLVOLUME_STR-DIVISION sy-vline 
WA_PCACOLLVOLUME_STR-CAISSUEDATE sy-vline 
WA_PCACOLLVOLUME_STR-CACOLLECTIONSTRATEGY sy-vline 
WA_PCACOLLVOLUME_STR-CACOLLECTIONSTRATEGYNAME sy-vline 
WA_PCACOLLVOLUME_STR-CACOLLECTIONSTEP sy-vline 
WA_PCACOLLVOLUME_STR-CACOLLECTIONSTEPNAME sy-vline 
WA_PCACOLLVOLUME_STR-TRANSACTIONCURRENCY sy-vline 
WA_PCACOLLVOLUME_STR-CADUNNINGBALANCE sy-vline 
WA_PCACOLLVOLUME_STR-CADUNNINGCHARGEAMOUNT sy-vline 
WA_PCACOLLVOLUME_STR-CADUNNINGINTERESTAMOUNT sy-vline 
WA_PCACOLLVOLUME_STR-CADUNNINGAMOUNT sy-vline 
WA_PCACOLLVOLUME_STR-CACLEARINGSTATUS sy-vline 
WA_PCACOLLVOLUME_STR-SEGMENT sy-vline 
WA_PCACOLLVOLUME_STR-SEGMENTNAME sy-vline 
WA_PCACOLLVOLUME_STR-CADOCUMENTTYPE sy-vline 
WA_PCACOLLVOLUME_STR-CAACCOUNTDETERMINATIONCODE sy-vline 
WA_PCACOLLVOLUME_STR-CAMAINTRANSACTION sy-vline 
WA_PCACOLLVOLUME_STR-CASUBTRANSACTION sy-vline 
WA_PCACOLLVOLUME_STR-CASTATISTICALITEMCODE sy-vline 
WA_PCACOLLVOLUME_STR-FIRSTNAME sy-vline 
WA_PCACOLLVOLUME_STR-LASTNAME sy-vline 
WA_PCACOLLVOLUME_STR-POSTALCODE sy-vline 
WA_PCACOLLVOLUME_STR-CONTRACTACCOUNTCATEGORY sy-vline 
WA_PCACOLLVOLUME_STR-EXCHANGERATEDATE sy-vline 
WA_PCACOLLVOLUME_STR-CAAUTHORIZATIONGROUP sy-vline      INTO ld_text SEPARATED BY SPACE.

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