ABAP Select data from SAP table TCPUC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TCPUC
*  INTO TABLE @DATA(IT_TCPUC2).
*--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_TCPUC INDEX 1 INTO DATA(WA_TCPUC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TCPUC>-CHARID = 1.
<TCPUC>-ISUPPER = 1.
<TCPUC>-ISLOWER = 1.
<TCPUC>-TOUPPER = 1.
<TCPUC>-TOLOWER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TCPUC-ISPRINT, sy-vline,
  WA_TCPUC-ISGRAPH, sy-vline,
  WA_TCPUC-ISPUNCT, sy-vline,
  WA_TCPUC-ISALPHA, sy-vline,
  WA_TCPUC-ISDIGIT, sy-vline,
  WA_TCPUC-ISALNUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TCPUC 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_TCPUC 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_TCPUC INTO WA_TCPUC.


*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 SCPUC, internal->external for field CHARID
CALL FUNCTION 'CONVERSION_EXIT_SCPUC_OUTPUT'
  EXPORTING
    input =                      WA_TCPUC-CHARID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCPUC-CHARID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SCPUC, internal->external for field TOUPPER
CALL FUNCTION 'CONVERSION_EXIT_SCPUC_OUTPUT'
  EXPORTING
    input =                      WA_TCPUC-TOUPPER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCPUC-TOUPPER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SCPUC, internal->external for field TOLOWER
CALL FUNCTION 'CONVERSION_EXIT_SCPUC_OUTPUT'
  EXPORTING
    input =                      WA_TCPUC-TOLOWER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCPUC-TOLOWER.
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_TCPUC_STR, 
CHARID TYPE STRING,
ISUPPER TYPE STRING,
ISLOWER TYPE STRING,
TOUPPER TYPE STRING,
TOLOWER TYPE STRING,
ISPRINT TYPE STRING,
ISGRAPH TYPE STRING,
ISPUNCT TYPE STRING,
ISALPHA TYPE STRING,
ISDIGIT TYPE STRING,
ISALNUM TYPE STRING,
ISXDIGIT TYPE STRING,
ISCNTRL TYPE STRING,
ISSPACE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TCPUC_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_TCPUC_STR-CHARID sy-vline 
WA_TCPUC_STR-ISUPPER sy-vline 
WA_TCPUC_STR-ISLOWER sy-vline 
WA_TCPUC_STR-TOUPPER sy-vline 
WA_TCPUC_STR-TOLOWER sy-vline 
WA_TCPUC_STR-ISPRINT sy-vline 
WA_TCPUC_STR-ISGRAPH sy-vline 
WA_TCPUC_STR-ISPUNCT sy-vline 
WA_TCPUC_STR-ISALPHA sy-vline 
WA_TCPUC_STR-ISDIGIT sy-vline 
WA_TCPUC_STR-ISALNUM sy-vline 
WA_TCPUC_STR-ISXDIGIT sy-vline 
WA_TCPUC_STR-ISCNTRL sy-vline 
WA_TCPUC_STR-ISSPACE sy-vline      INTO ld_text SEPARATED BY SPACE.

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