Question

I’m writing a program that executes different sql statements(query, dml, ddl, dcl). How can I determine that executed statement(method boolean Statement#execute(String s)) was ddl or dcl. I know how to determine a query. Statement was a query when execute() method return true, when statement#execute() return value is false then it can be dml, ddl or dcl. So how to determine type of statement?

Answer 1

The presence of a result (execute() == true) does not necessarily indicate a query. e.g. in PostgreSQL a DELETE statement can also return a result (when using the returning clause).

To process all results or update counts of a statement, you need to implement a loop that follows the guidelines documented with the Javadocs of getMoreResults():

There are no more results when the following is true:

// stmt is a Statement object
((stmt.getMoreResults(current) == false) && (stmt.getUpdateCount() == -1))