SqlTypes? Explanation Required Please

Question

After reading this example;
http://www.oracle.com/technology/sample_code/tech/java/sqlj_jdbc/files/advanced/ObjectJavaSample/Readme.html
I have successfully created an application that maps a Java object to an SQL object within a package so that the package can insert data within the object into the appropriate table.
I have a couple of queries about some of the code that I hope someone can answer for me please.
1) The Object Class needs to have this declared:
private static int[] sqlTypes = {12, 12, 12, 2};What is this declaring? and what is it used for?
2) This line of code is used a couple of times throughout the application:
struct = new MutableStruct(new Object[numberOfAttributes], sqlTypes, oraDatafactory);I am going to look through the API about this on Monday, but I'd appreciate it if anyone could give me a brief explanation, as a starter for ten, about what this is actually doing.
Thanks
David
Message was edited by:
David Ferguson

Answer 1

Hi John,
Thanks for your reply.
In the example that is provided by Oracle (see previous post for link) an array of sqlTypes is defined.
The Oracle example has an object with four attributes, and the array of sqlTypes has four elements (presume that is one for each attribute).
I have then edited this example to work with one of my sqlObjects which has 29 attributes, but I have left the sqlTypes array as having only 4 elements and it still works.
Q1. where can I find a definition of all the sqlTypes?
Q2. why does my application with 29 attributes still work when I have only declared an arrray of sqlTypes with 4 elements in it?
Q3. what is the sqlTypes array used for when mapping java objects to sqlObjects?
Any further information on this subject would be appreciated.
Thanks
David