org.apache.spark.sql.api.python.PythonSQLUtils.scala Maven / Gradle / Ivy
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* 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
*
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package org.apache.spark.sql.api.python
import org.apache.spark.api.java.JavaRDD
import org.apache.spark.sql.{DataFrame, SQLContext}
import org.apache.spark.sql.catalyst.analysis.FunctionRegistry
import org.apache.spark.sql.catalyst.expressions.ExpressionInfo
import org.apache.spark.sql.catalyst.parser.CatalystSqlParser
import org.apache.spark.sql.execution.arrow.ArrowConverters
import org.apache.spark.sql.types.DataType
private[sql] object PythonSQLUtils {
def parseDataType(typeText: String): DataType = CatalystSqlParser.parseDataType(typeText)
// This is needed when generating SQL documentation for built-in functions.
def listBuiltinFunctionInfos(): Array[ExpressionInfo] = {
FunctionRegistry.functionSet.flatMap(f => FunctionRegistry.builtin.lookupFunction(f)).toArray
}
/**
* Python Callable function to convert ArrowPayloads into a [[DataFrame]].
*
* @param payloadRDD A JavaRDD of ArrowPayloads.
* @param schemaString JSON Formatted Schema for ArrowPayloads.
* @param sqlContext The active [[SQLContext]].
* @return The converted [[DataFrame]].
*/
def arrowPayloadToDataFrame(
payloadRDD: JavaRDD[Array[Byte]],
schemaString: String,
sqlContext: SQLContext): DataFrame = {
ArrowConverters.toDataFrame(payloadRDD, schemaString, sqlContext)
}
}