ABAP Select data from SAP table PC2CA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC2CA 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 PC2CA. 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 PC2CA 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_PC2CA TYPE STANDARD TABLE OF PC2CA,
      WA_PC2CA TYPE PC2CA,
      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: <PC2CA> TYPE PC2CA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC2CA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC2CA
  INTO TABLE IT_PC2CA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC2CA
*  INTO TABLE @DATA(IT_PC2CA2).
*--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_PC2CA INDEX 1 INTO DATA(WA_PC2CA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC2CA ASSIGNING <PC2CA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC2CA>-NHINR = 1.
<PC2CA>-BEGDA = 1.
<PC2CA>-ENDDA = 1.
<PC2CA>-FAVOR = 1.
<PC2CA>-FANAM = 1.

ENDLOOP.

LOOP AT IT_PC2CA INTO WA_PC2CA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC2CA-FGBDT, sy-vline,
  WA_PC2CA-IDNUM, sy-vline,
  WA_PC2CA-FAREL, sy-vline,
  WA_PC2CA-VADAT, sy-vline,
  WA_PC2CA-NHIST, sy-vline,
  WA_PC2CA-NHISR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC2CA 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_PC2CA 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_PC2CA INTO WA_PC2CA.


*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 PDATE, internal->external for field FGBDT
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_PC2CA-FGBDT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PC2CA-FGBDT.
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_PC2CA_STR, 
NHINR TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
FAVOR TYPE STRING,
FANAM TYPE STRING,
FGBDT TYPE STRING,
IDNUM TYPE STRING,
FAREL TYPE STRING,
VADAT TYPE STRING,
NHIST TYPE STRING,
NHISR TYPE STRING,
NHIEX TYPE STRING,
EXRSN TYPE STRING,
DISAB TYPE STRING,
SSIPE TYPE STRING,
EERES TYPE STRING,
EECUR TYPE STRING,
LISTR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC2CA_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_PC2CA_STR-NHINR sy-vline 
WA_PC2CA_STR-BEGDA sy-vline 
WA_PC2CA_STR-ENDDA sy-vline 
WA_PC2CA_STR-FAVOR sy-vline 
WA_PC2CA_STR-FANAM sy-vline 
WA_PC2CA_STR-FGBDT sy-vline 
WA_PC2CA_STR-IDNUM sy-vline 
WA_PC2CA_STR-FAREL sy-vline 
WA_PC2CA_STR-VADAT sy-vline 
WA_PC2CA_STR-NHIST sy-vline 
WA_PC2CA_STR-NHISR sy-vline 
WA_PC2CA_STR-NHIEX sy-vline 
WA_PC2CA_STR-EXRSN sy-vline 
WA_PC2CA_STR-DISAB sy-vline 
WA_PC2CA_STR-SSIPE sy-vline 
WA_PC2CA_STR-EERES sy-vline 
WA_PC2CA_STR-EECUR sy-vline 
WA_PC2CA_STR-LISTR sy-vline      INTO ld_text SEPARATED BY SPACE.

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