Github user shivaram commented on a diff in the pull request:
https://github.com/apache/spark/pull/6620#discussion_r31674558
--- Diff: R/pkg/R/SQLContext.R ---
@@ -462,14 +462,19 @@ read.df <- function(sqlContext, path = NULL, source =
NULL, ...) {
source <- callJMethod(sqlContext, "getConf",
"spark.sql.sources.default",
"org.apache.spark.sql.parquet")
}
- sdf <- callJMethod(sqlContext, "load", source, options)
--- End diff --
Its actually harder to use the chaining API from SparkR -- We'll need to
get a jobj for sqlContext.read and then set schema on it and then call load on
it. Not sure its worth to make 3 RPCs from R to JVM ?
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