\name{getChains}
\alias{getChains}
\title{
Fetches a vector of valid chains from the database from a StatShop database.
}
\usage{
getChains()
}
\description{
  Returns a vector of chains in the database.  Note that chains need
  only exist in the database, they may not have any data associated with
  them.
}
\seealso{
  \code{\link{asp.dbConnect}}, \code{\link{getCycles}}
}
\examples{
### This example will only run if you have the StatShop test databases
### installed on your machine.
StatShop <- Sys.getenv("STATSHOP")
if (StatShop == "") {
  warn("StatShop not installed, skipping test.")
} else {
  asp.dbConnect("mcmc_statistics_test","junit")
  getChains()
  ### get all chains for which there is MCMC data.
  getChains()[getCycles()[,"chain_last_cycle"]>0]
  asp.dbDisconnect()
}
}
\keyword{database}