Windows :: How To Retrieve The Blob Column Data From Table
Mar 7, 2011
I use the oracle 10g database.I am trying to insert and retrive the image.Inserting an image is done.but while retrieving an image iam getting an run time exception in java "java.sql.sqlexception:general error".i am not able to understand this.
The code to insert the image is
FileInputStream fi=new FileInputStream(f);
int size = fi.available();
System.out.println("j"+size);
byte b1[] = new byte[size];
i=fi.read(b1,0,size);
System.out.println("i"+i);
st.executeUpdate("insert into image1 values('b1',"+k+")");
when i am retrieving the image i tried like this
ResultSet rs=st.executeQuery("select imagecolumn from tablename");
here iam getting an exception as i named above.
My company already work with Oracle 10g, I developed an application using this database and asp.NET. It allows the management of BD and exploitation of these data by clients via ASP pages.
Now I must use Microsoft Exchange (especially the calendar) to retrieve data from the Oracle database and embed links to setup my ASP pages to the calendar.
Being new to Exchange, my questions are:
- It can be done? - Should I use a particular driver? - Some idea ?
vlanke@tank_db> desc filetable; ID NULL NUMBER(6,0) FILE_CONTENT NULL
I am new to Database field.
- I created a table with 2 columns id (datatype as number) and file_content datatype as BLOB. - My question is under desc filetable; query why does it not show me a data type as BLOB. - create table query does not return any error to me. How do I verify that FILE_CONTENT column has datatype as blob.
How can i convert data in NCLOB column to BLOB variable? NCLOB now is tored in UTF16. The data character set is ISO8859P2. Need to keep BLOB at unicode.
when trying to calculate the occupied space for a table, I'm using DBA_SEGMENTS, which works fine as long as the table does not have a BLOB column.
As far as I can tell, the size of the BLOB data is stored with the SEGMENT_TYPE = 'LOBSEGMENT', but I cannot find a view that tells me which DBA_SEGMENT row belongs to the BLOB column in the table I'm checking.
To give you an example:
select sum(BYTES) from DBA_SEGMENTS where owner = user and segment_name = 'MY_TABLE' group by SEGMENT_NAME
returns 262144
running:
SELECT sum(length(blob_column)) FROM my_table
returns 821333
There are entries in DBA_SEGMENTS for my user with the type LOBSEGMENT, but I cannot find a way to map the correct DBA_SEGMENTS row to the table I am checking.
I am writing a SQL inside an application to retrieve data from a table for certain IDs or for All employees based on the user's input. I create a variable :SELECTION for the where clause. When I run the SQL, I receive the error of missing right parenthesis. There is no error if I hard code the IDs.
If the input is 'All' -> the variable :SELECTION is blank so if the SQL :
select name, address, ID from employee :SELECTION
will be
select name, address, ID from employee
If the input of users ID as '1234','9999' - > the :SELECTION = ' where ID in (:VARIABLEID)' :VARIABLEID = '1234','9999'
so the SQL: select name, address, ID from employee :SELECTION
should be
select name, address, ID from employee where ID in ('1234','9999')
However, I got the missing right parenthesis error. I suspect it is something with the single quote, so I tried different ways, but it is still not working.
I want to insert 1st two rows into Hierarchy table, then I would like to update Supervisor_2 to Supervisor_4. Here I don't want to use 'CONNECT BY PRIOR', as it take more time to execute (there are millions of records).SQL code for same.
1. For each of the Filename, if originating_site is not the same as receiving_site, it means that the file has been sent to receiving_site but has not been acknowledged received yet.
2. For each of the Filename, if originating_site is the same as receiving_site, it means the file has been sent and received by the receiving_site.
My task is to list out all the Filename per receiving_site that has been sent, but not received yet by the receiving_site. For example from the sample data above, I am expecting to see that siteA, fileB has not been received yet.
How can I do that? I had tried MINUS and NOT EXISTS command, but I am just not able to get the result that I want.
I have a "select ... into" in my PL/SQL and it doesn't retreive any data(I suppose just certain columns because if it doesn't retreive a row then the PL/SQL should throw an error) when there are many users accessing this table. It shouldn't be some table locking right? Because if it is, it should wait until the table is available then it will retreive data. Currently it just proceeds with the PL/SQL and selecting nothing in that query. what details should I look at to trace the cause of this problem.
I wanna have a form which has a list box which is including of all table names, by selecting the required table by user all column name and its related data should be retrieve.I have a cursor which give me all field names related to the table by I do not know how can I retrieve table data:
1. How to add item through block base on number of column which selected table has.
2. How to set value of table column in these mentioned column which added in the block.
base on performance it is better to retrieve data from view or mention the table names directly?
I have a select statement in from clause one of my table is view (which is having data collected from four tables) my question is whether performance of querry will be improved if i use directly all tables( four tables of a view) instead of a view
it seems that oracle data reader on some client machine is case sensitive. We are using oracle 10g. 2 client machines connect to the same DB and run the same code - one works and another doesn't. they are both using odac 2.111.7.20.
this is my .NET code (which works fine on every environment it was installed in the last 2 years):
using (OracleConnection sqlConn = new OracleConnection()) { sqlConn.ConnectionString = connectionString; using (OracleCommand sqlCmd = new OracleCommand()) { sqlCmd.CommandType = CommandType.StoredProcedure; sqlCmd.CommandText = "getValues"; [code].......
this is the oracle procedure:
PROCEDURE getValues( rc IN OUT sys_refcursor ) IS BEGIN OPEN rc FOR SELECT Name, Value FROM MySchema.MyTable; END;
The problem that we saw was that on one of the client machines dr["Name"] threw exception :
Error Source: Oracle.DataAccess.Client.OracleDataReader.GetOrdinal Error Message: System.IndexOutOfRangeException: Unable to find specified column in result set at Oracle.DataAccess.Client.OracleDataReader.GetOrdinal(String name) at Oracle.DataAccess.Client.OracleDataReader.get_Item(String columnName)
We modified the code and used NAME instead of Name and it worked!! (dr["NAME"] instead of dr["Name"])
How can it be? from oracle documentation: A case-sensitive search is made to locate the specified column by its name. If this fails, then a case-insensitive search is made.
My question is what can cause such a behavior? Some ODAC/ODP definitions, .NET configuration?
I have a table with a column of type blob. Now i want to create a procedure which will insert into that table. But I don't like to create a directory. How can i solve this.
I want to insert a row like this:
insert into table x(image) values('d:photo est.jpg');
CREATE TABLE "COMPDB"."PRODUCTS" ( "PRO_ID" NUMBER NOT NULL ENABLE, "PRO_NAME" VARCHAR2(40 BYTE) NOT NULL ENABLE, "COMPETITOR" NUMBER NOT NULL ENABLE, "CATEGORY" NUMBER NOT NULL ENABLE,
[Code]..
Now my problem:
In want to delete the blob column(The Content) in Products and the columns, which belong to this column(Filename,Mimetype,Last_update_date). EMPTY_BLOB() doesn't work
Where '00001234' is the Invoice , '12222' is Netamount field and highlighted in red is the $ amount for that invoice.
The only data i need query to return 12222 (netamount)= $amount. I tried using substr select substr((TESTDATA),19,26)test from TABLEA; But this gives me the only the first row but not other amount which have different positions.
My table mst_product(product_code,product_name) and its value is (190,toy),(198,tim),(280,bush),(jupiter,top),(AUTO2,auto),(281,tig),(282,com)...and so on
I want to make a query to select those items which is equal to and greater than 280. So how we make a query.How select those items which does not have any alphabetic letters.
I am trying to extract the BLOB column in Oracle Apex and show the contents of it as a popup message.
The files which are stored in the blob column are being zipped using windows zip function in Perl and being inserted in the dataabse using some perl program as follows,
my $zip = Archive::Zip->new(); my $zipfile = $zip->addFile( @$_->[1] ,basename(@$_->[0]));
While extracting the blob column we are using the utl_compress.lz_uncompress_extract() to extract the uncompressed version of file, but we are getting the following error as
"ORA-29294: A data error occurred during compression or uncompression".
I even tried the solution as mentioned in oracle forum
I am using Forms 6i,From my Form, user selects "sno" and upload BLOB image through OAF Upload utility. It stores the rowid of "SNO" and image...into Table "t1"...Now, i want to update the BLOB image into the original table"t2" using rowid..For this , i wrote the rowlevel trigger on Table "t1", in the trigger, i called a Procedure...In that procedure .. i am trying to update the BLOB column..It is not updating the BLOB column..But it is updating the Other values.. except BLOB column.
I want to store a pdf file into a database column of BLOB type. The pdf file on the client system not on the database server. Is there any way i can achieve this?
I have two tables with BLOB datatype. I am trying to copy from one column to another column , i am getting errors
CREATE OR REPLACE PROCEDURE update_blob_lob_copy( v_id in integer, v_string in varchar ) as auditlob lobdemoaudit.theblob%type; sourcelob lobdemo.THEBLOB%type; [code]...
