org.apache.spark.sql.execution
Limit
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package execution
Overridden by concrete implementations of SparkPlan.
Returns the result of this query as an RDD[Row] by delegating to doExecute after adding query plan information to created RDDs for visualization.
Returns the result of this query as an RDD[Row] by delegating to doExecute after adding query plan information to created RDDs for visualization. Concrete implementations of SparkPlan should override doExecute instead.
Runs this query returning the result as an array.
Runs this query returning the first n rows as an array.
Runs this query returning the first n rows as an array.
This is modeled after RDD.take but never runs any job locally on the driver.
Overridden make copy also propogates sqlContext to copied plan.
Overridden make copy also propogates sqlContext to copied plan.
Specifies how data is ordered in each partition.
Specifies how data is ordered in each partition.
Specifies how data is partitioned across different nodes in the cluster.
Specifies any partition requirements on the input data for this operator.
Specifies any partition requirements on the input data for this operator.
Specifies sort order for each partition requirements on the input data for this operator.
Specifies sort order for each partition requirements on the input data for this operator.
A handle to the SQL Context that was used to create this plan.
A handle to the SQL Context that was used to create this plan. Since many operators need access to the sqlContext for RDD operations or configuration this field is automatically populated by the query planning infrastructure.
:: DeveloperApi :: Take the first limit elements. Note that the implementation is different depending on whether this is a terminal operator or not. If it is terminal and is invoked using executeCollect, this operator uses something similar to Spark's take method on the Spark driver. If it is not terminal or is invoked using execute, we first take the limit on each partition, and then repartition all the data to a single partition to compute the global limit.