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[SPARK-5602][SQL] Better support for creating DataFrame from local da…
…ta collection 1. Added methods to create DataFrames from Seq[Product] 2. Added executeTake to avoid running a Spark job on LocalRelations. Author: Reynold Xin <rxin@databricks.com> Closes #4372 from rxin/localDataFrame and squashes the following commits: f696858 [Reynold Xin] style checker. 839ef7f [Reynold Xin] [SPARK-5602][SQL] Better support for creating DataFrame from local data collection.
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sql/core/src/main/scala/org/apache/spark/sql/execution/LocalTableScan.scala
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/* | ||
* Licensed to the Apache Software Foundation (ASF) under one or more | ||
* contributor license agreements. See the NOTICE file distributed with | ||
* this work for additional information regarding copyright ownership. | ||
* The ASF licenses this file to You under the Apache License, Version 2.0 | ||
* (the "License"); you may not use this file except in compliance with | ||
* the License. You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
*/ | ||
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package org.apache.spark.sql.execution | ||
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import org.apache.spark.sql.Row | ||
import org.apache.spark.sql.catalyst.expressions.Attribute | ||
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/** | ||
* Physical plan node for scanning data from a local collection. | ||
*/ | ||
case class LocalTableScan(output: Seq[Attribute], rows: Seq[Row]) extends LeafNode { | ||
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private lazy val rdd = sqlContext.sparkContext.parallelize(rows) | ||
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override def execute() = rdd | ||
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override def executeCollect() = rows.toArray | ||
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override def executeTake(limit: Int) = rows.take(limit).toArray | ||
} |
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