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From: davecramer (@davecramer) <[email protected]>
To: pgjdbc/pgjdbc <[email protected]>
Subject: Re: [pgjdbc/pgjdbc] issue #2656: Adaptive Fetch doesn't enable ResultSet streaming
Date: Mon, 31 Oct 2022 18:03:15 +0000
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

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 ?

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