Set data mappings between PostgreSQL and R/S-Plus

Not yet implemented

Methods

res

a PostgreSQLResult object as returned by dbSendQuery.

flds

a data.frame with field descriptions as returned by dbColumnInfo.

...

any additional arguments are passed to the implementing method.

References

See the Database Interface definition document DBI.pdf in the base directory of this package or https://cran.r-project.org/package=DBI.

See also

PostgreSQL, dbSendQuery, fetch, dbColumnInfo.

Examples

if (FALSE) { # \dontrun{
makeImage <- function(x) {
  .C("make_Image", as.integer(x), length(x))
}

res <- dbSendQuery(con, statement)
flds <- dbColumnInfo(res)
flds[3, "Sclass"] <- makeImage

dbSetDataMappings(rs, flds)

im <- fetch(rs, n = -1)
} # }