clob

I have a PL/SQL procedure that does a lot of SUBSTR s on a VARCHAR2 parameter. I would like to remove the length limit, so I tried to change it to CLOB . Works fine, but performance suffers, so I did some tests (based on these tests from 2005). UPDATE : I can reproduce this on several different instances with different Oracle versions and different hardware, dbms_lob.substr is always noticeable slower than substr(CLOB) , and a lot slower than SUBSTR(VARCHAR2) . Bob's results and the tests in the link above tell a different story. Can anyone explain this, or at least reproduce either Bob's or

When I search the web for inserting BLOBs into Oracle database with jdbc thin driver, most of the webpages suggest a 3-step approach: insert empty_blob() value. select the row with for update . insert the real value. This works fine for me, here is an example: Connection oracleConnection = ... byte[] testArray = ... PreparedStatement ps = oracleConnection.prepareStatement( "insert into test (id, blobfield) values(?, empty_blob())"); ps.setInt(1, 100); ps.executeUpdate(); ps.close(); ps = oracleConnection.prepareStatement( "select blobfield from test where id = ? for update"); ps.setInt(1, 100)

I am using Hibernate 3.5.6 with Oracle 10g. I am seeing the below exception during initialization but the application itself is working fine. What is the cause for this exception? and how it can be corrected? Exception Disabling contextual LOB creation as createClob() method threw error : java.lang.reflect.InvocationTargetException Info Oracle version: Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 JDBC driver: Oracle JDBC driver, version: 11.1.0.7.0 As you noticed, this exception isn't a real problem. It happens during the boot, when Hibernate tries to retrieve some meta

I’m not sure how to use Java/JDBC to insert a very long string into an Oracle database. I have a String which is greater than 4000 characters, lets say it’s 6000. I want to take this string and store it in an Oracle database. The way to do this seems to be with the CLOB datatype. Okay, so I declared the column as description CLOB. Now, when it comes time to actually insert the data, I have a prepared statement pstmt. It looks like pstmt = conn.prepareStatement(“INSERT INTO Table VALUES(?)”) . So I want to use the method pstmt.setClob() . However, I don’t know how to create a Clob object with

I need to write an XML file content into oracle database where the column is of CLOB datatype. How will I do that? OUTDATED See Lukas Eder's answer below. With about 100 lines of code ;-) Here is an example . The main point: Unlike with other JDBC drivers, the one from Oracle doesn't support using Reader and InputStream as parameters of an INSERT . Instead, you must SELECT the CLOB column FOR UPDATE and then write into the ResultSet I suggest that you move this code into a helper method/class. Otherwise, it will pollute the rest of your code. The easiest way is to simply use the stmt.setString

I have a big CLOB (more than 32kB) that I want to read to a String, using StringBuilder. How do I do this in the most efficient way? I can not use the "int length" constructor for StringBuilder since the lenght of my CLOB is longer than a "int" and needs a "long" value. I am not that confortable with the Java I/O classes, and would like to get some guidance. Edit - I have tried with this code for clobToString(): private String clobToString(Clob data) { StringBuilder sb = new StringBuilder(); try { Reader reader = data.getCharacterStream(); BufferedReader br = new BufferedReader(reader); String

I want to insert large size of data that character length is more than 10,000. I used CLOB data type to each column. I can't insert/update that large data it shows following error: ORA-01704: string literal too long My code insert into table1 value(1,'values>10000'); You'll have to assign the value to a variable & use the variable to insert the data DECLARE v_long_text CLOB; BEGIN v_long_text := 'your long string of text'; INSERT INTO table VALUES (1, v_long_text); END; To make it clear: there are limits set to character strings: you cannot have a string literal over 4000 bytes in SQL 32k in

While I try to set the value of over 4000 characters on a field that has data type CLOB , it gives me this error : ORA-01704: string literal too long. Any suggestion, which data type would be applicable for me if I have to set value of unlimited characters although for my case, it happens to be of about 15000 chars. Note : The long string that I am trying to store is encoded in ANSI. What are you using when operate with CLOB? In all events you can do it with PL/SQL DECLARE str varchar2(32767); BEGIN str := 'Very-very-...-very-very-very-very-very-very long string value'; update t1 set col1 =