Oracle blob with LabView max 2000 Bytes?
I use LabView 7.1.1 with the Database Connectivity Toolset.
The Databases which i use are 1. Sybase SQL Anywhere 9.0 and Oracle 10g. wenn i use the Sybase i am able to store BLOBS without any problems. Now i have to use the Oracle DB and when i try to save Blobs the length of the BLOBs are cut to max 2000 Bytes.
Lutz
First to answer your direct question: No there is no limit to the size of a BLOB that you can save to Oracle with LV. I know this because I routinely save BLOBS a lot larger than 2k to an Oracle 10 database. The main difference is that I gave up on the Database Connectivity Toolkit a long time ago because it is way too expensive, it doesn't work very well and it's totally unnecessary. To replace it, do a search of my posts and a while back I posted a library of the drivers that I wrote and use. They are much more efficient than the DCT and are easier to use. In addition because they are essentially a thin layer covering the underlying the ADO interface in Windows, they make it easier to diagnose problems when they do occur. Which brings us back to your problem...
As I understand your post, the BLOBs are trucated to 2000 bytes. Yes? Are there any errors generated? What is the structure of the table in question? Could you post the SQL that created the table? What does your connection string to the database look like?
Mike...
Certified Professional Instructor
Certified LabVIEW Architect
LabVIEW Champion
"... after all, He's not a tame lion..."
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VALUES ("456", "999PDQ", "2000", "Ford", "45586", "4/25/2002", "456");
INSERT INTO tbl_MyDataSource ( Customer, VIN, [Year], Make, Odometer, InvDate, Amount )
VALUES ("876", "888QWE", "2010", "Mercedes", "38332", "10/13/2010", "15973");
Which should produce a table containing these columns with these values:
tbl_MyDataSource:
Customer VIN Year Make Odometer InvDate Amount
123 | 321XYZ | 2012 | Honda | 1900 | 2/15/2012 | 987.00
123 | 432ABC | 2012 | Toyota | 2300 | 1/10/2012 | 6,546.00
456 | 999PDQ | 2000 | Ford | 45586 | 4/25/2002 | 456.00
876 | 888QWE | 2010 | Mercedes | 38332 | 10/13/2010 | 15,973.00
The desired result is to use Oracle 9i to convert the columns into rows using sql without using any scripts if possible.
qsel_MyResults:
Column1 Column2 Column3 Column4 Column5
Customer | 123 | 123 | 456 | 876
VIN | 321XYZ | 432ABC | 999PDQ | 888QWE
Year | 2012 | 2012 | 2000 | 2010
Make | Honda | Toyota | Ford | Mercedes
Odometer | 1900 | 2300 | 45586 | 38332
InvDate | 2/15/2012 | 1/10/2012 | 4/25/2002 | 10/13/2010
Amount | 987.00 | 6,546.00 | 456.00 | 15,973.00
The syntax in SQL is something I am not yet sure of.
You said:
>
"Don't use the same name or alias for two different things. if you have a table called t, then don't use t as an alais for an in-line view. Pick a different name, like ordered_t, instead.">
but I'm not clear on which part of the SQL you are suggesting I change. The code I posted is something I pieced together from some of the other postings and is not something I full understand the syntax of.
Here is my latest (failed) attempt at this.
select *
from (select * from tbl_MyDataSource) t;
with data as
(select rownum rnum, t.* from (select * from t order by c1) ordered_t), -- changed 't' to 'ordered_t'
rows_to_have as
(select level rr from dual connect by level <= 7 -- number of columns in T
select rnum,
max(decode(rr, 1, c1)),
max(decode(rr, 2, c2)),
max(decode(rr, 3, c3)),
max(decode(rr, 4, c3)),
max(decode(rr, 5, c3)),
max(decode(rr, 6, c3)),
max(decode(rr, 7, c3)),
from data, rows_to_have
group by rnumIn the above code the "select * from tbl_MyDataSource" is a place holder for my select query which runs without error and has these exact number of fields and data types as order shown in the tbl_MyDataSource above.
This code produces the error 'ORA-00936: missing expression'. The error appears to be starting with the 'with data as' line if I am reading my PL/Sql window correctly. Everything above that row runs without error.
Thank you for your great patients and for sharing your considerable depth of knowledge. Any help is gratefully welcomed. -
Can I use oracle blob by CMP bean in weblogic 6?
I use weblogic 6.1(sp3) and Jbuilder 7.when I try to use oracle blob by CMP bean,the
errors are:
javax.ejb.FinderException: Exception raised in findByPrimaryKey
java.io.StreamCorruptedException: InputStream does not contain a serialized object
What should I do?Is there examples about using oracle blob?
thanks a lot!Great! So what was the problem?
Regards,
Slava Imeshev
"Roger Lee" <[email protected]> wrote in message
news:[email protected]...
>
Finally got it working with CMP, which is my preferred choice (over BMP).
I read the Excel Spreadsheet into a "byte []" array, and the Entity Beanmapped
"byte []" to the Blob column in the Oracle table.
"Slava Imeshev" <[email protected]> wrote:
Roger,
I'm not quite sure I undestand the problem. Could you:
1. Post deployment descriptors in part related to this
CMP bean?
2. Post the piece of code that is failing?
Please post the information above and we will help
you to hunt the problem down.
No, I don't have any problems accessing blobs
from CMP.
Regards,
Slava Imeshev
"Roger Lee" <[email protected]> wrote in message
news:[email protected]...
Yes. I have added;
<dbms_column-type>OracleBlob</dbms-column-type>
It fails because the locater to the blob, obtained by findBYPrimaryKeyis
null.
i.e. an empty_blob() is not created.
Have you got CMP to access Blobs in WLS 6.1?
"Slava Imeshev" <[email protected]> wrote:
Hi Roger,
Have you tried using OracleBlob as dbms-column-type?
Also, could you post that part of your code that is failing?
Regards,
Slava Imeshev
"Roger Lee" <[email protected]> wrote in message
news:[email protected]...
I can access Clobs using CMP. If you are using the Oracle OCI Driveryou
do not
need to add this line.
However if you are using the Oracle Type 4 Thin drivers you need
to
add;
<dbms_column-type>OracleClob</dbms-column-type>
to the file;
weblogic-cmp-rdbms-jar-xml
This DOES NOT work with Blobs.
I am unable to get WebLogic 6.1 sp4 persist a Blob to an Oracle
8.1.x
table and
retrieve it using either CMP or BMP.
Unless any one show me a complete working CMP and BMP example?
Roger Lee
Deepak Vohra <[email protected]> wrote:
BLOB and CLOB DBMS Column Support for the Oracle DBMS
http://edocs.bea.com/wls/docs61/ejb/cmp.html#1061636
shybird wrote:
I use weblogic 6.1(sp3) and Jbuilder 7.when I try to use oracle
blob
by CMP bean,the
errors are:
javax.ejb.FinderException: Exception raised in findByPrimaryKey
java.io.StreamCorruptedException: InputStream does not contain
a
serialized
object
What should I do?Is there examples about using oracle blob?
thanks a lot! -
How to store a blob with toplink
Hi .. I am using toplink 10g (10.1.3.0) and oracle9 and I am trying to insert a blob with toplink in the database but I dont know how I need to use a resultset and a PreparedStatement if it is the case hor how use toplink???
You should be able to read the file in and convert its data to a byte-array in your object. TopLink will handle the conversion from byte-array to BLOB in the database.
If you are using the Oracle thin JDBC drivers, they have a 5k size limit, if your file is larger than this you will need to use the Oracle8/9Platform in your login and a TypeConversionMapping and set the fieldClassification to java.sql.Blob.
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