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Possible Bug in JDBC?


Possible Bug in JDBC?

By : user2950797
Date : November 17 2020, 11:58 AM
I wish this helpful for you I think I found an enduring solution for the problem meanwhile. Since my sql generator needs to stay very flexible I somehow need a way to pass along sql fragments with their corresponding parameters without evaluating them right away. Instead the generator must be able to assemble and compose various sql fragments into bigger fragments at any time - just as he does now - but now with the acompanying, not yet evaluated parameters. I came up with this prototype:
code :
DB.withConnection("betterdating") { implicit connection =>
  case class SqlFragment(Fragment: String, Args: NamedParameter*)

  val aa = SqlFragment("select MovieID from Movies")
  val bb = SqlFragment("join Profiles using(ProfileID)")
  val cc = SqlFragment("where Caption like \"%{a}\" and MovieID = {b}", 'a -> "s", 'b -> 5)

  // combine all fragments
  val v1 = SQL(Seq(aa, bb, cc).map(_.Fragment).mkString(" "))
            .on((aa.Args ++ bb.Args ++ cc.Args): _*)

  // better solution
  val v2 = Seq(aa, bb, cc).unzip(frag => (frag.Fragment, frag.Args)) match {
    case (frags, args) => SQL(frags.mkString(" ")).on(args.flatten: _*)
  }

  // works
  println(v1.as(scalar[Long].singleOpt))
  println(v2.as(scalar[Long].singleOpt))
}
// finally transform the expression
// list a single sql fragment
expressions.zipWithIndex.map { case (expr, index) =>
  s"""
    (concat(Movies.Caption, " ", Movies.Description, " ", Movies.Kind, " ", Profiles.Nickname, " ",
    (select coalesce(group_concat(Tags.Name), "") from Tags join TagLinks using (TagID)
    where TagLinks.MovieID = Movies.MovieID)) like "%{expr$index}%"))
  """ -> (s"expr$index" -> expr)
}.unzip match { case (frags, args) => SqlFragment(frags.mkString(" and "), args.flatten: _*)


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Spring + Hibernate + Maven: jCannot create JDBC driver of class 'com.mysql.jdbc.Driver' for connect URL 'jdbc:mysql//loc

Spring + Hibernate + Maven: jCannot create JDBC driver of class 'com.mysql.jdbc.Driver' for connect URL 'jdbc:mysql//loc


By : Lexley
Date : March 29 2020, 07:55 AM
I hope this helps you . seems like you're missing the colon in file jdbc.properties for the database URL.
code :
jdbc:mysql//localhost:3306/test
jdbc:mysql://localhost:3306/test
Unable to connect to SQL Server via JDBC. No suitable driver found for jdbc:sqlserver://

Unable to connect to SQL Server via JDBC. No suitable driver found for jdbc:sqlserver://


By : Noobee
Date : March 29 2020, 07:55 AM
it should still fix some issue As @ScaryWombat and @JozefChocholacek had hinted, it turned out to be a class path issue. Apparently, you have to copy and paste just the sqljdbc42.jar file, and this file only directly into the WEB-INF\lib folder and not within any sub-folder.
I did that it still gave me that error.
logstash-input-jdbc: “Unknown setting 'jdbc_driver_libary' for jdbc {:level=>:error}”

logstash-input-jdbc: “Unknown setting 'jdbc_driver_libary' for jdbc {:level=>:error}”


By : EsConKay
Date : March 29 2020, 07:55 AM
I wish this help you I try to access to MySQL service with logstash. I installed logstash-input-jdbc (/opt/logstash/bin/logstash-plugin install logstash-input-jdbc) and created /etc/logstash/conf.d/sample.conf: , The first error says it all:
code :
Unknown setting 'jdbc_driver_libary' for jdbc {:level=>:error}
    jdbc_driver_libary => "mysql-connector-java-5.1.40-bin.jar"
    jdbc_driver_library => "mysql-connector-java-5.1.40-bin.jar"
                   ^
                   |
JMeter - Cannot load JDBC driver class 'net.sourceforge.jtds.jdbc.Driver ' erro in JDBC Request

JMeter - Cannot load JDBC driver class 'net.sourceforge.jtds.jdbc.Driver ' erro in JDBC Request


By : James L
Date : March 29 2020, 07:55 AM
this one helps. You most probably didn't put the driver jar jtds-1.3.1.jar (not the zip) in jmeter/lib folder which is why you get this error.
Also ensure :
Spring JDBC Could not load JDBC driver class [oracle.jdbc.driver.OracleDriver]

Spring JDBC Could not load JDBC driver class [oracle.jdbc.driver.OracleDriver]


By : Steph_SM2015
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Make sure that you have ojdbc.jar gets added into your class path. If you want, you can also double check it by opening .classpath file and look for ojdbc.jar entry. If you don't have it, download it from the the maven repo as mentioned below:
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