How to convert blob data into clob using plsql

hi all,
I have requirement to convert blob column into clob .
version details
BANNER
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - Production
PL/SQL Release 11.1.0.7.0 - Production
CORE     11.1.0.7.0     Production
TNS for 32-bit Windows: Version 11.1.0.7.0 - Production
NLSRTL Version 11.1.0.7.0 - Production
DECLARE
   v_blob      temp.blob_column%TYPE;------this is blob data type column contains (CSV file which is inserted from screens)
   v_clob      CLOB; --i want to copy blob column data into this clob
   v_warning   NUMBER;
BEGIN
   SELECT blob_column
     INTO v_blob
     FROM temp
    WHERE pk = 75000676;
   DBMS_LOB.converttoclob (dest_lob          => v_clob,
                           src_blob          => v_blob,
                           amount            => DBMS_LOB.lobmaxsize,
                           dest_offset       => 1,
                           src_offset        => 1,
                           blob_csid         => 1, -- what is the use of this parameter
                           lang_context      => 1,
                           warning           => v_warning
   DBMS_OUTPUT.put_line (v_warning);
EXCEPTION
   WHEN OTHERS
   THEN
      DBMS_OUTPUT.put_line (SQLCODE);
      DBMS_OUTPUT.put_line (SQLERRM);
END;I am not getting what is the use of blob_csid , lang_context parameters after going the trough the documentation .
Any help in this regard would be highly appreciated .......
Thanks
Edited by: prakash on Feb 5, 2012 11:41 PM

Post the 4 digit Oracle version.
Did you read the Doc for DBMS_LOB.CONVERTTOCLOB? - http://docs.oracle.com/cd/B28359_01/appdev.111/b28419/d_lob.htm
The function can convert data from one character set to another. If the source data uses a different character set than the target you need to provide the character set id of the source data.
The blob_csid parameter is where you would provide the value for the source character set.
If the source and target use the same character set then just pass zero. Your code is passing a one.
>
General Notes
You must specify the character set of the source data in the blob_csid parameter. You can pass a zero value for blob_csid. When you do so, the database assumes that the BLOB contains character data in the same character set as the destination CLOB.
>
Same for 'lang_context' - your code is using 1; just use 0. It is an IN OUT
>
lang_context
(IN) Language context, such as shift status, for the current conversion.
(OUT) The language context at the time when the current conversion is done.
This information is returned so you can use it for subsequent conversions without losing or misinterpreting any source data. For the very first conversion, or if do not care, use the default value of zero.

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      TEXT_DATA      = gt_file_table
    EXCEPTIONS
      NAME_MISSING   = 1
      NAME_TWICE     = 2
      NOT_FOUND      = 3
      ILLEGAL_LAYOUT = 4
      INTERNAL_ERROR = 5
      SIZE_MISMATCH = 6
      OTHERS         = 7.
IF SY-SUBRC <> 0.
* Implement suitable error handling here
ENDIF.
Passed the spool id generated to below FM but it is not converting into pdf
CALL FUNCTION 'CONVERT_ABAPSPOOLJOB_2_PDF'
    EXPORTING
      SRC_SPOOLID                    = lv_spoolid
     NO_DIALOG                      = ' '
     DST_DEVICE                     = 'LOCW'
     PDF_DESTINATION                = 'X'
*     NO_BACKGROUND                  =
*     GET_SIZE_FROM_FORMAT           =
*     USE_CASCADING                  = ' '
*   IMPORTING
*     PDF_BYTECOUNT                  = lv_bytecount
*     PDF_SPOOLID                    = lv_pdf1
*     LIST_PAGECOUNT                 =
*     BTC_JOBNAME                    =
*     BTC_JOBCOUNT                   =
*     BIN_FILE                       = lv_pdf
   TABLES
     PDF                            = lt_pdf
   EXCEPTIONS
     ERR_NO_ABAP_SPOOLJOB           = 1
     ERR_NO_SPOOLJOB                = 2
     ERR_NO_PERMISSION              = 3
     ERR_CONV_NOT_POSSIBLE          = 4
     ERR_BAD_DESTDEVICE             = 5
     USER_CANCELLED                 = 6
     ERR_SPOOLERROR                 = 7
     ERR_TEMSEERROR                 = 8
     ERR_BTCJOB_OPEN_FAILED         = 9
     ERR_BTCJOB_SUBMIT_FAILED       = 10
     ERR_BTCJOB_CLOSE_FAILED        = 11
     OTHERS                         = 12
IF SY-SUBRC <> 0.
* Implement suitable error handling here
ENDIF.
When I go to SP01 and check the spool generated it is in raw document type.
How can I convert this raw document to pdf type ??
Please help me to resolve this.
Regards,
Krishna

Ok, since I can't edit the post anymore, here the new version of code, without the use of SCMS_XSTRING_TO_BINARY for intermediate table. Reasons: effectively doubles the memory use and I don't want to check if the kernel is cutting off the hexdecimal nulls when the last spool line is written, or to relay of that behaviour.
Matthew Billingham, and other mods: it would be really nice if you could hide the old version please (this post here). The number of google results for that FM is scary and I really don't want to contribute to promoting its use...
REPORT zjbtst2.
PARAMETERS: p_file TYPE string
   LOWER CASE
   DEFAULT '/usr/sap/....'
   OBLIGATORY.
PARAMETERS: p_dest TYPE rspopname
DEFAULT 'LP01'
OBLIGATORY .
PERFORM main USING p_file p_dest.
*&      Form main
FORM main
USING
    i_file TYPE string
    i_dest TYPE rspopname.
DATA: lo_handle TYPE REF TO cl_rspo_spool_handle .
DATA: l_spoolid TYPE rspoid.
DATA: l_content TYPE xstring .
DATA: l_message_text TYPE string .
PERFORM get_file USING i_file CHANGING l_content .
PERFORM new_spool USING i_dest CHANGING lo_handle l_spoolid.
PERFORM write_spool USING lo_handle l_spoolid l_content .
l_message_text = |Spool { l_spoolid } created| .
MESSAGE l_message_text TYPE 'I' .
ENDFORM .                  "main
*&      Form get_file
FORM get_file
   USING i_file TYPE string
   CHANGING c_content TYPE xstring.
DATA: l_message_text TYPE string .
CLEAR c_content .
OPEN DATASET i_file FOR INPUT IN BINARY MODE
    MESSAGE l_message_text.
IF sy-subrc NE 0 .
    MESSAGE l_message_text TYPE 'E' .
ELSE.
    READ DATASET i_file INTO c_content .
    CLOSE DATASET i_file.
ENDIF .
ENDFORM .                   "get_file
*&      Form new_spool
FORM new_spool
   USING
     i_destination TYPE rspopname
   CHANGING
     co_handle TYPE REF TO cl_rspo_spool_handle
     c_spoolid TYPE rspoid .
cl_rspo_spool_handle=>open(
    EXPORTING
      dest           = i_destination
      name           = 'Test'
      layout         = 'G_RAW'
      doctype        = 'BIN'
    IMPORTING
      ref            = co_handle
      spoolid        = c_spoolid
    EXCEPTIONS
      device_missing = 1
      name_twice     = 2
      no_such_device = 3
      operation_failed = 4
      OTHERS         = 5
IF sy-subrc <> 0.
    MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
               WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.
ENDFORM .                    "new_spool
*&      Form WRITE_SPOOL
FORM write_spool
USING
    io_handle TYPE REF TO cl_rspo_spool_handle
    i_spoolid TYPE rspoid
    i_content TYPE xstring .
DATA: l_buffer(128) TYPE x ."Hmm, 128 does work, 4096 doesn't...
DATA: l_buffer_length TYPE i .
DATA: l_full_buffers_count TYPE i .
DATA: l_part_buffer_length TYPE i .
DATA: l_offset TYPE i .
DATA: l_length TYPE i .
l_buffer_length = xstrlen( l_buffer ) .
l_full_buffers_count = xstrlen( i_content ) DIV l_buffer_length .
l_part_buffer_length = xstrlen( i_content ) MOD l_buffer_length .
DO l_full_buffers_count + 1 TIMES .
    IF sy-index LE l_full_buffers_count .
      l_length = l_buffer_length .
    ELSEIF l_part_buffer_length GT 0 .
      l_length = l_part_buffer_length .
    ELSE.
      EXIT .
    ENDIF .
    l_buffer = i_content+l_offset(l_length) .
    ADD l_length TO l_offset .
    io_handle->write_binary(
      EXPORTING
        data           = l_buffer
        length         = l_length
      EXCEPTIONS
        not_open       = 1
        operation_failed = 2
        OTHERS         = 3
    IF sy-subrc <> 0.
      MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
                 WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
    ENDIF.
ENDDO .
io_handle->close(
    EXPORTING
      final          = 'X'
    EXCEPTIONS
      operation_failed = 1
      already_closed = 2
      OTHERS         = 3
IF sy-subrc <> 0.
    MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
               WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.
ENDFORM .                    "write_spool

How to convert labview data into opc tag

Hi all,
Can any one please tell me how i can convert the labview data global into a OPC tag? I have some data globals reading and writing data to the globals. Now i wanted to use a PLC device to send its outputs to the field.
The PLC device will supports the OPC tags so i wanted t create OPC recognised tags in my labview. Is it possible. I saw that labview also having OPC functinalities. Please any one guide me in doing this.
I will be very thankful to them
Ramme..

As I said, I believe you can do this for globals as well by opening its front panel (double click the global) and using a DS connection for the control that represents that specific global.
As for other alternatives:
NI sells the DSC module which comes with an OPC server and with better tags.
You can use a common protocol like Modbus to interact with the PLC.
You can use the custom protocol used by the PLC.
The last two would require that you would change your program structure, so you would only want to use them under certain conditions.
I believe the practical limit for OPC tags with DS is a few hundred tags, but I never used it myself so I didn't run into it. You can try searching the forums to find out more.
Try to take over the world!

How to convert exponential data into number for the downloaded excelsheet

Hi
I have downloaded one field data i.e. having char of 50, into excel sheet and it is displaying as exponential in the excel sheet.
The data numbers should display as text only i.e 1236547896321 and not exponential
Is anyone can tell how we can do this
Thanks
Pallavi

Hello Pallvai,
The problem of exponential is with the excel. Excel converts the large numbet into exponential.
To avoid this you can make the number into text then excel won't convert it into exponential.
For that you can do a simple trick. Just prefix a single quote ( ' ) in the field.
eg:
field = 1236547896321.
then,
constants c_quote type c value '''. "<-- single quote
concatenate c_quote field into field.
" This will make the EXCEL to consider this field as text not number and hence it will not be considered
" as exponential.
Hope this solves your problem.
Regards,
Sachinkumar Mehta

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