title: DBI::dbSendQuery fails with RJDBC::JDBC for SQL SERVER
body: <p>When I run the insert statement with <strong>odbc</strong> driver everythings fine.</p>
  
  <pre><code>drv &lt;- odbc::odbc()
  conn &lt;- createConn(drv, trusted_connection = T, dsn="mydsn", uid="myuid", pwd="mypwd")
  DBI::dbSendQuery("INSERT INTO \"dbo\".\"testjdbc\" (d) values('4')")
  </code></pre>
  
  <p>When I run the select statement with <strong>jdbc</strong> everything is fine too:  </p>
  
  <pre><code>   drv &lt;- RJDBC::JDBC(driverClass = "com.microsoft.sqlserver.jdbc.SQLServerDriver", classPath = "C:\\mssql-jdbc-7.0.0.jre8.jar") 
      conn &lt;- DBI::dbConnect(drv, trusted_connection = T, url = "jdbc:sqlserver://myserver\\\\myinstance:1111;databaseName=mydatabasename", user="myuid", password="mypwd") 
      DBI::dbGetQuery(conn, "Select * from dbo.mytable")
  </code></pre>
  
  <p>and the connection for <strong>jdbc</strong> is valid:  </p>
  
  <pre><code>drv &lt;- RJDBC::JDBC(driverClass = "com.microsoft.sqlserver.jdbc.SQLServerDriver", classPath = "C:\\mssql-jdbc-7.0.0.jre8.jar") 
          conn &lt;- DBI::dbConnect(drv, trusted_connection = T, url = "jdbc:sqlserver://myserver\\\\myinstance:1111;databaseName=mydatabasename", user="myuid", password="mypwd") 
      DBI::dbIsValid(conn) # TRUE
  </code></pre>
  
  <p>But when I try insert statement (the same like the first one) with <strong>jdbc</strong> driver like this:</p>
  
  <pre><code>drv &lt;- RJDBC::JDBC(driverClass = "com.microsoft.sqlserver.jdbc.SQLServerDriver", classPath = "C:\\mssql-jdbc-7.0.0.jre8.jar") 
  conn &lt;- DBI::dbConnect(drv, trusted_connection = T, url = "jdbc:sqlserver://myserver\\\\myinstance:1111;databaseName=mydatabasename", user="myuid", password="mypwd") 
  DBI::dbSendQuery(conn, "INSERT INTO \"dbo\".\"testjdbc\" (d) values('4')")
  </code></pre>
  
  <p>then I get the error:</p>
  
  <pre><code>Error in .verify.JDBC.result(r, "Unable to retrieve JDBC result set for ",  : 
    Unable to retrieve JDBC result set for INSERT INTO "dbo"."testjdbc" (d) values('4') (The statement did not return a result set.)
  </code></pre>
  
  <p>So <strong>jdbc</strong> select is OK but inserts, updates, deletes gives errors while with <strong>odbc</strong> I can do everything.</p>