| broadcast {SparkR} | R Documentation |
Return a new SparkDataFrame marked as small enough for use in broadcast joins.
broadcast(x) ## S4 method for signature 'SparkDataFrame' broadcast(x)
x |
a SparkDataFrame. |
Equivalent to hint(x, "broadcast").
a SparkDataFrame.
broadcast since 2.3.0
Other SparkDataFrame functions: SparkDataFrame-class,
agg, alias,
arrange, as.data.frame,
attach,SparkDataFrame-method,
cache, checkpoint,
coalesce, collect,
colnames, coltypes,
createOrReplaceTempView,
crossJoin, cube,
dapplyCollect, dapply,
describe, dim,
distinct, dropDuplicates,
dropna, drop,
dtypes, exceptAll,
except, explain,
filter, first,
gapplyCollect, gapply,
getNumPartitions, group_by,
head, hint,
histogram, insertInto,
intersectAll, intersect,
isLocal, isStreaming,
join, limit,
localCheckpoint, merge,
mutate, ncol,
nrow, persist,
printSchema, randomSplit,
rbind, rename,
repartitionByRange,
repartition, rollup,
sample, saveAsTable,
schema, selectExpr,
select, showDF,
show, storageLevel,
str, subset,
summary, take,
toJSON, unionAll,
unionByName, union,
unpersist, withColumn,
withWatermark, with,
write.df, write.jdbc,
write.json, write.orc,
write.parquet, write.stream,
write.text
## Not run:
##D df <- createDataFrame(mtcars)
##D avg_mpg <- mean(groupBy(createDataFrame(mtcars), "cyl"), "mpg")
##D
##D head(join(df, broadcast(avg_mpg), df$cyl == avg_mpg$cyl))
## End(Not run)