Invalid column index using PreparedStatement

Question

I am trying to query same data. But the preparedStatement thrown an SQLException about wrong indexing even though the index start from 1 as the documentation said.

Here

Answer 1

Print out the query string before executing it:

SELECT title, registered FROM paperWHERE title LIKE '%?%'

The answer should be obvious.

You need spaces to delimit keywords.

Answer 2

Your question-mark place holder is inside single quotes, so it's being seen as a literal character - and not a place holder at all. When the statement is parsed the '%?%' is just a string and no bind variable is seen, so no bind variable can be set - there are no variables, so no variable with index 1.

You can use concatenation to fix this:

    PreparedStatement searchKeyword = 
    connection.prepareStatement("SELECT title, registered FROM paper "
    + "WHERE title LIKE '%' || ? || '%'");