suggerimento

Specifica un suggerimento sul dataframe corrente.

Sintassi

hint(name: str, *parameters: Union["PrimitiveType", "Column", List["PrimitiveType"]])

Parametri

Restituzioni

DataFrame: dataframe con hint.

Examples

df = spark.createDataFrame([(2, "Alice"), (5, "Bob")], schema=["age", "name"])
df2 = spark.createDataFrame([Row(height=80, name="Tom"), Row(height=85, name="Bob")])
df.join(df2, "name").explain()
# == Physical Plan ==
# ...
# ... +- SortMergeJoin ...
# ...

df.join(df2.hint("broadcast"), "name").explain()
# == Physical Plan ==
# ...
# ... +- BroadcastHashJoin ...
# ...