I tried to directly insert a Java object from typ mottrow.MItem to the table ITEMS in my embedded Derby DB. But I got the following error:
java.sql.SQLException: An attempt was made to get a data value of type 'BLOB' from a data value of type '
In the query I used, I had defined the row ITEM to the typ BLOB, because with the typ JAVA_OBJECT I got an error. In the derby documentation I have read that the a JAVA_OBJECT is stored as BLOB in the DB, so I defined it directly as BLOB.
SQL query used to create table:
String query = "create table APP.ITEMS (" +
"ID INT NOT NULL PRIMARY KEY GENERATED ALWAYS AS IDENTITY (START WITH 1, INCREMENT BY 1)," +
"ITEM BLOB," +
"LEVEL INT NOT NULL," +
"OWNER VARCHAR(30)," +
"LASTACCESS DATE," +
"FORMERLEVEL INTEGER NOT NULL )";
Statement to insert my JAVA_OBJECT:
PreparedStatement stmt = con.prepareStatement("insert into APP.ITEMS (ITEM) VALUES (?)");
Does somebody knows a solution for this problem?