ABAP Select data from SAP table PCNTXITYPE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PCNTXITYPE
*  INTO TABLE @DATA(IT_PCNTXITYPE2).
*--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_PCNTXITYPE INDEX 1 INTO DATA(WA_PCNTXITYPE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PCNTXITYPE>-MANDT = 1.
<PCNTXITYPE>-CN_TAXINVCTYPE = 1.
<PCNTXITYPE>-HASINVCCODE = 1.
<PCNTXITYPE>-INVCCODELEN = 1.
<PCNTXITYPE>-INVCCODECHKREGEXPR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PCNTXITYPE-INVCNMBRLEN, sy-vline,
  WA_PCNTXITYPE-INVCNMBRCHKREGEXPR, sy-vline,
  WA_PCNTXITYPE-HASSUPPLIER, sy-vline,
  WA_PCNTXITYPE-DECLAREVALIDITY, sy-vline,
  WA_PCNTXITYPE-DECLAREVALIDITYUNIT, sy-vline,
  WA_PCNTXITYPE-INPUTENABLED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PCNTXITYPE 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_PCNTXITYPE 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_PCNTXITYPE INTO WA_PCNTXITYPE.


*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 CUNIT, internal->external for field DECLAREVALIDITYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PCNTXITYPE-DECLAREVALIDITYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PCNTXITYPE-DECLAREVALIDITYUNIT.
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_PCNTXITYPE_STR, 
MANDT TYPE STRING,
CN_TAXINVCTYPE TYPE STRING,
HASINVCCODE TYPE STRING,
INVCCODELEN TYPE STRING,
INVCCODECHKREGEXPR TYPE STRING,
INVCNMBRLEN TYPE STRING,
INVCNMBRCHKREGEXPR TYPE STRING,
HASSUPPLIER TYPE STRING,
DECLAREVALIDITY TYPE STRING,
DECLAREVALIDITYUNIT TYPE STRING,
INPUTENABLED TYPE STRING,
OUTPUTENABLED TYPE STRING,
PAPERINVOICEENABLED TYPE STRING,
EINVCENABLED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PCNTXITYPE_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_PCNTXITYPE_STR-MANDT sy-vline 
WA_PCNTXITYPE_STR-CN_TAXINVCTYPE sy-vline 
WA_PCNTXITYPE_STR-HASINVCCODE sy-vline 
WA_PCNTXITYPE_STR-INVCCODELEN sy-vline 
WA_PCNTXITYPE_STR-INVCCODECHKREGEXPR sy-vline 
WA_PCNTXITYPE_STR-INVCNMBRLEN sy-vline 
WA_PCNTXITYPE_STR-INVCNMBRCHKREGEXPR sy-vline 
WA_PCNTXITYPE_STR-HASSUPPLIER sy-vline 
WA_PCNTXITYPE_STR-DECLAREVALIDITY sy-vline 
WA_PCNTXITYPE_STR-DECLAREVALIDITYUNIT sy-vline 
WA_PCNTXITYPE_STR-INPUTENABLED sy-vline 
WA_PCNTXITYPE_STR-OUTPUTENABLED sy-vline 
WA_PCNTXITYPE_STR-PAPERINVOICEENABLED sy-vline 
WA_PCNTXITYPE_STR-EINVCENABLED sy-vline      INTO ld_text SEPARATED BY SPACE.

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