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From "Pavel Kuznetsov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-11251) SQL: getMoreResults() infinitely reports about update operation on zeroCursor
Date Thu, 07 Feb 2019 19:43:00 GMT
Pavel Kuznetsov created IGNITE-11251:
----------------------------------------

             Summary: SQL: getMoreResults() infinitely reports about update operation on zeroCursor
                 Key: IGNITE-11251
                 URL: https://issues.apache.org/jira/browse/IGNITE-11251
             Project: Ignite
          Issue Type: Bug
          Components: jdbc, sql
            Reporter: Pavel Kuznetsov


If we got sql query that contain empty statement, jdbc thin driver will allways return {{true}}
from {{getMoreResults}} method.
Jdbc spec says: 
{noformat}
oves to this Statement object's next result, returns true if it is a ResultSet object, 
<...>
Returns:
true if the next result is a ResultSet object; false if it is an update count or there are
no more results
{noformat}

so test : 
{code:java}
 @Test
    public void test () throws Exception {
        try (Connection c = GridTestUtils.connect(grid(0), null)) {
            try (PreparedStatement p = c.prepareStatement(";")) {
                boolean isResultSet = p.execute();

                // Adding next line works the problem around:
                // p.getUpdateCount() == 0;
                
                boolean isResultSetReturned = p.getMoreResults();
                
               // should be false:
                assertFalse(isResultSetReturned); // == true
            }
        }
    }
{code}

{{getResultSet}} is {{null}} in this case.



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