Updating lobs using oraclecommand and oracleparameteruname
Packages and stored procedures enjoy a performance advantage because the jobs of parsing the SQL statements and creating the data access plan are enacted when the procedure is first created—not at runtime.
The code for this example is illustrated in Listing 2. Then you must set up the parameters and finally call the procedure using Execute Non Query method of the Oracle Command object.
The first thing to do is to import the object's class residing in the namespace System. The following code in Listing 3 shows how to create a function named get_count_emp_by_dept which receives as its input parameter the department number and returns the number of employees in this department.
In older Java projects I've been writing and reading CLOBS and I know you have to handle those fields a bit different than normal VARCHARs and such. NET Dynamic Help and whatever I could find on the Internet, and the funny thing is I found three different ways of doing it; 2 really simple and one not so simple.
The weird thing is that I don't think the first two options is supposed to be working - but when I test them they work just fine. To test this, I have created a simple table in Oracle, which consists of 2 fields; ID (INT) and TEXT (CLOB). I'm reading a simple text-file created with Notepad, which is 499 KB in size.
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For all the examples, we're going to use the default database ORCL which comes with the Oracle database installation.