SI-7420?

console.log

/* :paste
import scalikejdbc._

// initialize JDBC driver & connection pool
Class.forName("org.h2.Driver")
ConnectionPool.singleton("jdbc:h2:mem:hello", "user", "pass")

// ad-hoc session provider on the REPL
implicit val session = AutoSession

// table creation, you can run DDL by using #execute as same as JDBC
sql"""
create table members (
  id serial not null primary key, 
  name varchar(64), 
  created_at timestamp not null
)
""".execute.apply()

// insert initial data
Seq("Alice", "Bob", "Chris") foreach { name =>
  sql"insert into members (name, created_at) values (${name}, current_timestamp)".update.apply()
}

// for now, retrieves all data as Map value 
val entities: List[Map[String, Any]] = sql"select * from members".map(_.toMap).list.apply()

// defines entity object and extractor
import org.joda.time._
case class Member(id: Long, name: Option[String], createdAt: DateTime)
object Member extends SQLSyntaxSupport[Member] {
  override val tableName = "members"
  def apply(rs: WrappedResultSet) = new Member(
    rs.long("id"), rs.stringOpt("name"), rs.jodaDateTime("created_at"))
}
*/
scala> val c = Member.column
c: scalikejdbc.ColumnName[Member] = ColumnSQLSyntaxProvider(Member$@7d9798b)

scala> val ps = Seq(c.name -> "Alice", c.createdAt -> DateTime.now)
ps: Seq[(scalikejdbc.interpolation.SQLSyntax, Comparable[_ >: org.joda.time.ReadableInstant with String <: Object] with java.io.Serializable)] = List((SQLSyntax(value: name, parameters: List()),Alice), (SQLSyntax(value: created_at, parameters: List()),2014-05-27T12:51:49.370+09:00))

scala> update(Member).set(ps:_*).where.eq(c.name, "Alice").toSQL.update.apply()
<console>:21: error: applyDynamic does not support passing a vararg parameter
              update(Member).set(ps:_*).where.eq(c.name, "Alice").toSQL.update.apply()
                                                   ^

scala> val u = update(Member).set(ps:_*)
u: scalikejdbc.UpdateSQLBuilder = UpdateSQLBuilder(SQLSyntax(value: update members set name = ?, created_at = ?, parameters: List(Alice, 2014-05-27T12:51:49.370+09:00)))

scala> u.where.eq(c.name, "Alice").toSQL.update.apply()
12:52:40.791 [run-main-0] DEBUG s.StatementExecutor$$anon$1 - SQL execution completed

  [SQL Execution]
   update members set name = 'Alice', created_at = '2014-05-27 12:51:49.37' where name = 'Alice'; (2 ms)

  [Stack Trace]
    ...
    $line8.$read$$iw$$iw$$iw$$iw$$iw$$iw$$iw$.<init>(<console>:22)
    $line8.$read$$iw$$iw$$iw$$iw$$iw$$iw$$iw$.<clinit>(<console>)
    $line8.$eval$.$print$lzycompute(<console>:7)
    $line8.$eval$.$print(<console>:6)
    $line8.$eval.$print(<console>)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    java.lang.reflect.Method.invoke(Method.java:483)
    scala.tools.nsc.interpreter.IMain$ReadEvalPrint.call(IMain.scala:736)
    scala.tools.nsc.interpreter.IMain$Request.loadAndRun(IMain.scala:983)
    scala.tools.nsc.interpreter.IMain$WrappedRequest$$anonfun$loadAndRunReq$1.apply(IMain.scala:590)
    scala.tools.nsc.interpreter.IMain$WrappedRequest$$anonfun$loadAndRunReq$1.apply(IMain.scala:589)
    scala.reflect.internal.util.ScalaClassLoader$class.asContext(ScalaClassLoader.scala:31)
    scala.reflect.internal.util.AbstractFileClassLoader.asContext(AbstractFileClassLoader.scala:19)
    ...

res1: Int = 1

• ScalikeJDBC 2.0.0
• Scala 2.11.1