Updated rows is not returned

[koekj]

In the PreparedStatementHandler the execute function is used and afterwards the getUpdateCount is used. However in my case (Sybase) the updateCount returns zero. The two statements can be combined to 1; executeUpdate which returns the correct result.

[harawata]

Hello @koekj ,

Changing to executeUpdate has side effects and we cannot do that.

I just tested and the following test passes.
So, there may be something wrong with your code or config (if the driver really return 0, it would be a driver bug).
If you need further help, please provide information to reproduce the issue.

import static org.junit.jupiter.api.Assertions.*;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;

import org.junit.jupiter.api.Test;

import net.harawata.jdbc.connection.JdbcConnection;

class SybaseTest {
  @Test
  void test() throws Exception {
    Class.forName("com.sybase.jdbc42.jdbc.SybDriver");
    String url = "jdbc:sybase:Tds:192.168.60.8:5000?serviceName=TEST";
    String username = "xxx";
    String password = "xxx";
    try (Connection con = DriverManager.getConnection(url, username, password)) {
      try (Statement st = con.createStatement()) {
        st.execute("drop TABLE  test ");
      } catch (SQLException e) {
        //
      }
      try (Statement st = con.createStatement()) {
        st.execute("CREATE TABLE test (id int, t varchar(20))");
        st.execute("insert into test (id, t) values (1, 'val')");
      }
      try (PreparedStatement stmt = con.prepareStatement("update test set t = ? where id = ?")) {
        stmt.setString(1, "val2");
        stmt.setInt(2, 1);
        assertFalse(stmt.execute());
        assertEquals(1, stmt.getUpdateCount());
      }
    }
  }
}

• DB version : Adaptive Server Enterprise 16.0.03.02
• Driver version : jConnect (TM) for JDBC(TM)/16.0 SP04 (Build 27487)/P/EBF29603/JDK 1.8.0/jdbc42dev/OPT/Mon Nov 9 19:10:17 PST 2020

[koekj]

Ok, I will check this; I'm using spring boot in combination with mybatis.
It seems that you are right; the driver I'm currently using is not given the correct answer which is
jConnect (TM) for JDBC(TM)/16.0 SP03 PL08 (Build 27463)/P/EBF29225/JDK 1.6.0/jdbcdev/OPT/Sun Jan 12 19:56:00 PST 2020
I will try the get hold on the latest jconn4 driver from sybase/sap.

[koekj]

Hi,
I tested it with the jconn42.jar
jConnect (TM) for JDBC(TM)/16.0 SP04 PL03 (Buil
d 27530)/P/EBF30373/JDK 1.8.0/jdbcsp04/OPT/Sun Jul 31 19:17:02 PDT 20
22
using java 17 but it doesn't seem to be working. The updateCount returns still zero, when I use the executeUpdate it returns the correct value which is 1.
assert stmt.execute() == false;
int rows = stmt.getUpdateCount();
assert rows == 1; <== returns zero
int _rows = stmt.executeUpdate();
assert _rows == 1; <== returns 1.
And the statement is very simple I'm using update x set nm=nm where relation=1 and nr=1;

[harawata]

@koekj ,

Okay, then please create a small demo project like these and share it on your GitHub repo.
To investigate this issue, we need to reproduce it on our end.

[harawata]

Oh, by the way, if the issue is reproducible with a plain JDBC code (i.e. without MyBatis) like the one I posted, please paste it.

[koekj]

I use an existing database where I'm not the "super user" so I have to see if I can setup a local database for reproduction. Did you use a docker image to get the database up and running as that would help me to speed up the reproduction.

[harawata]

Last time checked, there was no official docker image, so I had to install express edition or something on my VirtualBox VM.
@SAP 👎

[koekj]

Ok clear. I will do the same then.

[guoweixin]

看到了，