hint {SparkR}R Documentation

hint

Description

Specifies execution plan hint and return a new SparkDataFrame.

Usage

hint(x, name, ...)

## S4 method for signature 'SparkDataFrame,character'
hint(x, name, ...)

Arguments

x

a SparkDataFrame.

name

a name of the hint.

...

optional parameters for the hint.

Value

A SparkDataFrame.

Note

hint since 2.2.0

See Also

Other SparkDataFrame functions: SparkDataFrame-class, agg, alias, arrange, as.data.frame, attach,SparkDataFrame-method, broadcast, cache, checkpoint, coalesce, collect, colnames, coltypes, createOrReplaceTempView, crossJoin, cube, dapplyCollect, dapply, describe, dim, distinct, dropDuplicates, dropna, drop, dtypes, except, explain, filter, first, gapplyCollect, gapply, getNumPartitions, group_by, head, histogram, insertInto, intersect, isLocal, isStreaming, join, limit, localCheckpoint, merge, mutate, ncol, nrow, persist, printSchema, randomSplit, rbind, registerTempTable, rename, repartition, rollup, sample, saveAsTable, schema, selectExpr, select, showDF, show, storageLevel, str, subset, summary, take, toJSON, unionByName, union, unpersist, withColumn, withWatermark, with, write.df, write.jdbc, write.json, write.orc, write.parquet, write.stream, write.text

Examples

## Not run: 
##D df <- createDataFrame(mtcars)
##D avg_mpg <- mean(groupBy(createDataFrame(mtcars), "cyl"), "mpg")
##D 
##D head(join(df, hint(avg_mpg, "broadcast"), df$cyl == avg_mpg$cyl))
## End(Not run)

[Package SparkR version 2.3.1 Index]