将查询中的 BIT 作为 Prepared Statement 中的参数传递

Question

I want to pass a bit as one of the parameters in Prepared Statement. My query should look like this:

query = select * from tbl_security_details('user',O::BIT)

I am framing the query as:

query = select * from tbl_security_details(?,?)
PreparedStatement ps = connection.prepareStatement(query);
ps.setString(1,"user")
ps.setString(2,"0::BIT")

However, this throws an error.

Can someone explain how I can pass 0::BIT from the prepare statement without it appending the single quote by itself and getting converted to String?

Answer 1

Write the prepared statement so that the cast is part of the query:

String query = "select * from tbl_security_details(?, ?::bit)";
java.sql.PreparedStatement ps = connection.prepareStatement(query);
ps.setString(1, "user");
ps.setString(2, "0");

That is necessary, because you can only pass a constant value to the prepared statement, not an SQL expression.