SQL & PL/SQL :: Extracting Blob Data Using Oracle Function?
Jul 26, 2012
Below is the function code used to extract data from blob column. The function works fine when the blob data length < 2000 bytes. When it is more than, it is throwing an error as below.
Table name: mr_test
Columns: id number
seo blob
CREATE OR REPLACE FUNCTION fn_mr_blob(in_id IN number) return varchar2
IS
len NUMBER;
[Code]....
ORA-01489: result of string concatenation is too long
when I replcae the
"SELECT myvar||trim(dbms_lob.substr(seo,bytelen,vstart)) into myvar FROM mr_test WHERE id = in_id;"
with
SELECT trim(dbms_lob.substr(seo,bytelen,vstart)) into myvar FROM mr_test WHERE id = in_id;
myvar1 := myvar1||myvar;
ORA-06502: PL/SQL: numeric or value error: character string buffer too small
Currently, I am running 4 separate queries in order to retrieve specific data from a XML file. Is there a way of extracting all 4 values via XML tags in a single query - e.g. :
At the moment, I am extracting the required info as follows.
Example query 1: message_content, 2000, 2303 > retrieves starting point for an error header
select ml.message_reference, UTL_RAW.CAST_TO_VARCHAR2 (dbms_lob.substr(message_content, 2000, 2303)) from table.msg_archive ma, table.msg_log ml where ma.message_id = ml.message_id and ml.message__cd = 'MP_XML' and ml.message_reference in (456123)
Once retrieved, I transfer to Excel and use a formula to extract the specific header (e.g. using =MID(B1,1,11))
Example query 2: message_content, 2000, 581 > retrieves the starting point for a user id.
select ml.message_reference, UTL_RAW.CAST_TO_VARCHAR2 (dbms_lob.substr(message_content, 2000, 581)) from table.msg_archive ma, table.msg_log ml where ma.message_id = ml.message_id and ml.message__cd = 'MP_XML' and ml.message_reference in (456123)
WITH table_data AS (SELECT 'ABC12345*Z23*1234*Cheese*24/02/2011' str FROM DUAL UNION ALL SELECT 'Aasda1ewr3345*A32345*1234*Bread*01/11/2012' str FROM DUAL UNION ALL SELECT 'dsf31212*TEST*124234*Blue*06/07/2007' str FROM DUAL [code].........
I can extract the data from before the first *, but I need to also be able to extract the data from between the 1st and 2nd *s, e.g. Z23, A32345, TEST, THIS and THAT from the sample data above.
I exported and imported data from one oracle database to another, but not all the data got loaded in to the destination database. Basically it is filtering the data. Can it be because of the reason that the sql developer may be an express edition?
Now i have to insert this xml into DB , the table consist of following columns ( row number , property name , value ) Expected out put is (1,student name,Raymond) ,( 1, studentid , 1) ( 1, studentAge, 11) (1,Studentmark , 0) The challenges here is
1. how to get the tag names and populate the property name column ? 2. The number of properties for a student can be variable , How can i deal with them ?
I am using the below function to return a blob (CSV) content, this is working fine..But i need to modify this function to display headline for the report and fixed width column in CSV ( then user no need to expand the each and every column ).
create or replace function GET_BLOB ( p_query varchar2 ) return blob as
In my project, I implement file's upload and download function by "BLOB Support in Forms and Reports" of official development document Advanced Programming Techniques When user click the BLOB column to download file, I want to trigger an action to update one table for counting this file is downloaded one more times. But I can not find any "dynamic action" about this Blob column of Report.
I have two different database servers where I need to migrate table data from one schema to another schema in batch wise for eg say 100 rows. I used BULK COLLECT with LIMIT. But to access BLOB data from table I have facing errors. What could be other approache to do the same.
here pc_work is a table containing BLOB data in sourse schema. I am fetch data from this table to table t1_test_work using dblink but not working
[ declare type array is table of test_work%ROWTYPE; L_DATA array; cursor C is select * from pc_work@prpctrg; begin open C; LOOP
I have a table containing BLOB column which stores scanned images. Due to an application error, few extra data was padded with BLOB data and now we want to remove it.
The table count will be near to 10 million rows.
We need to remove data from 161byte to 167byte of the blob data. I tried to do with DBMS_LOB.ERASE.But it will create blank spaces for the removed data. Here we need to reduce the size of BLOB data by 6 bytes by removing data from 161bytes to 167 bytes.
Since XML-files only contain character data, we could/should store it in a CLOB, rather than a BLOB.
But, One of my friend having a table where a column is defined as bloband came to know that XML data are being stored. I searched for some article with keyword 'How to insert large XML data in BLOB' But did not work.How to store the large xml content in a Blob and How to extract it?
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.
I am getting the file using CLIENT_GET_FILE_NAME. I need to read the data from the .xsl file and convert it into blob. The file should not be stored in DB.
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.
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.
I am seeing some trailing characters in the coloumn when we are inserting Blob. I am doing SQLBindParameter with SQL_C_BINARY and SQL_LONGVARBINARY as InputOutputType and ValueType respectively.Do you see any problem in this. I get this problem when I am running Oracle 11 g client on an Windows 2008 Server 64bit.When the same set of query is fired from Windows 2003 Server 32bit with Oracle 10g it works fine and no trailing character gets inserted.
We will create a new instance in our production server, but this time, part of it's table structure has a BLOB data type (re: <column name> blob(3000)). It's our first time to handle this kind of Oracle data type. What would be my estimate size for it's default tablespace?
Actuall we requried to send and email from Oracle 10g database having attachements big in size aprox 10 to 30 MB.Is there any Custom Procedure or standard procedure for this.
We are using UTL_SMTP and UTL_MAIL (Only support RAW attachement upto 32 k in size).
I have table with Blob column. In the blog column I have XML data (see below). I wanted to parse xml and get the value of note '<GetTest>'. How do I achieve that? Sample Table:
create table SAMPLE_XML_TABLE ( ID NUMBER not null, XMLSTRING BLOB, ); <?xml version="1.0" standalone="no"?> <FromResponse xmlns="http://www.somewebsite.com/FromResponse"> <Code>0000</Code> [code].........
I have a table in schema with a BLOB field. I store employee's picture in this field. Fields in this table are emp_id (number) emp_name (varchar2) and emp_photo (BLOB). I want to ask if there is a way in pl / sql that i could empty this BLOB field to null or reset this field so that user can change the saved photo graph and save another one.
what i am looking for is something like
alter table employee set emp_photo = empty_blob() or alter table employee set emp_photo = null
