ResultSet overflows when rows are inserted.
-------------------------------------------
Key: DERBY-585
URL: http://issues.apache.org/jira/browse/DERBY-585
Project: Derby
Type: Bug
Components: JDBC
Versions: 10.1.1.0
Environment: Red Hat Enterprise Linux ES release 3 (Taroon Update 4), intel
Reporter: Thierry de Pretto
Derby jdbc driver doesn't seem to be able to find the end of a
ResultSet when rows are inserted while the ResultSet is walked. For
instance, the execution of the code
import java.sql.Connection;
import java.sql.Statement;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.ResultSet;
import java.sql.DriverManager;
public class Test
{
public static void main(String[] pArgs) throws Exception
{
Class.forName("org.apache.derby.jdbc.ClientDriver").newInstance();
String url = "jdbc:derby://localhost:1527/sample";
// Class.forName("org.apache.derby.jdbc.EmbeddedDriver").newInstance();
// String url = "jdbc:derby:/tmp/sample;create=true";
Connection conn = DriverManager.getConnection(url);
Statement s = conn.createStatement();
try
{
s.execute("drop table q");
}
catch (Exception e)
{
System.out.println(e.toString());
}
try
{
s.execute("create table q(q integer)");
}
catch (Exception e)
{
System.out.println(e.toString());
}
PreparedStatement p = conn.prepareStatement("insert into q values (1)");
// for (int i = 0; i<=10; i++) { p.executeUpdate();} // it works for
small table.
for (int i = 0; i<=10000; i++) { p.executeUpdate();} // it never ends
for big table.
conn.commit();
ResultSet rs = s.executeQuery("SELECT q FROM q");
System.out.println("q, w");
while (rs.next()) {
int q = rs.getInt("q");
System.out.println(""+ q);
conn.createStatement().execute("insert into q values (2)");
}
rs.close();
s.close();
}
}
ends with exception
Exception in thread "main" org.apache.derby.client.am.SqlException: Run out of
sections to use,sections limited to 32k currently
at org.apache.derby.client.am.SectionManager.getSection(Unknown Source)
at org.apache.derby.client.am.SectionManager.getDynamicSection(Unknown
Source)
at org.apache.derby.client.am.Statement.flowExecute(Unknown Source)
at org.apache.derby.client.am.Statement.executeX(Unknown Source)
at org.apache.derby.client.am.Statement.execute(Unknown Source)
at Test.main(Test.java:95)
if table q is big enough because ResultSet.next() seems to retrieve
the rows inserted after the select execution. Note that it also occurs
for join statement.
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