Message-ID: <gh-pgjdbc-pgjdbc-2656-c1297468981@github.com>
From: "davecramer (@davecramer)" <noreply+davecramer@github.com>
To: "pgjdbc/pgjdbc" <noreply+pgjdbc-pgjdbc@github.com>
Date: Mon, 31 Oct 2022 18:03:15 +0000
Subject: Re: [pgjdbc/pgjdbc] issue #2656: Adaptive Fetch doesn't enable ResultSet streaming
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I tested the following code and it appears to work (note this is groovy, but add semicolons and it should compile)
```
class TestFetchSize {
    public static void main(String[] args)
    {
        Properties properties = new Properties()
        properties.setProperty(PGProperty.USER.getName(),"test")
        properties.setProperty(PGProperty.PASSWORD.getName(),"password")
        properties.setProperty(PGProperty.LOGGER_LEVEL.getName(), "TRACE")
        properties.setProperty(PGProperty.PREFER_QUERY_MODE.getName(),"extended")
        PGProperty.ADAPTIVE_FETCH.set(properties, true);

        DriverManager.setLogWriter(new PrintWriter(System.err));

        Connection con = DriverManager.getConnection('jdbc:postgresql://localhost:5432/test',properties)

        con.setAutoCommit(false)

        Statement stmt = con.createStatement(); //ResultSet.TYPE_FORWARD_ONLY,ResultSet.CONCUR_READ_ONLY)
        stmt.setFetchSize(10)
        ResultSet rs = stmt.executeQuery('select * from fetchrows')
        while (rs.next())
        {
            rs.getInt('id')
        }
        con.commit()
        con.close()

    }

}
```

I tested this code and it does actually use cursors. 

Can you share your code ?