udf

Apache Spark - UDF doesn't seem to work with spark-submit

由 久未见 提交于 2019-12-13 14:32:23
问题 I am unable to get UDF to work with spark-submit. I don't have any problem while using spark-shell. Please see below, the Error message, sample code, build.sbt and the command to run the program Will appreciate all the help! - Regards, Venki ERROR message: (line 20 is where the UDF is defined) Exception in thread "main" java.lang.NoSuchMethodError: scala.reflect.api.JavaUniverse.runtimeMirror(Ljava/lang/ClassLoader;) Lscala/reflect/api/JavaUniverse$JavaMirror; at TryUDFApp$.main(TryUDFApp

No typeTag available Error in scala spark udf

由 寵の児 提交于 2019-12-13 14:03:31
问题 I am getting no typetag found for Seq[String] while compiling the following code val post_event_list_evar_lookup: (String => Seq[String]) = (pel: String) => { pel.split(",").filterNot(_.contains("=")).map(ev => { evarMapBroadCast.value.getOrElse(ev.toInt, "NotAnEvar").toLowerCase }).filterNot(_.contains("notanevar")) } val sqlFunc_post_event_list_evar_lookup = udf(post_event_list_evar_lookup) Error message I am getting is I am using scala 2.10.4. Same code compiles with out any error in scala

如何在 PyFlink 1.10 中自定义 Python UDF？

由 余生长醉 提交于 2019-12-13 11:10:54
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 作者：孙金城（金竹） 我们知道 PyFlink 是在 Apache Flink 1.9 版新增的，那么在 Apache Flink 1.10 中 Python UDF 功能支持的速度是否能够满足用户的急切需求呢？ Python UDF 的发展趋势 直观的判断，PyFlink Python UDF 的功能也可以如上图一样能够迅速从幼苗变成大树，为啥有此判断，请继续往下看… Flink on Beam 我们都知道有 Beam on Flink 的场景，就是 Beam 支持多种 Runner，也就是说 Beam SDK 编写的 Job 可以运行在 Flink 之上。如下图所示： 上面这图是 Beam Portability Framework 的架构图，他描述了 Beam 如何支持多语言，如何支持多 Runner，单独说 Apache Flink 的时候我们就可以说是 Beam on Flink，那么怎么解释 Flink on Beam 呢？ 在 Apache Flink 1.10 中我们所说的 Flink on Beam 更精确的说是 PyFlink on Beam Portability Framework。我们看一下简单的架构图，如下： Beam Portability Framework

A GenericUDF Function to Extract a Field From an Array of Structs‏

由 孤街浪徒 提交于 2019-12-13 00:45:24
问题 I am trying to write a GenericUDF function to collect all of a specific struct field(s) within an array for each record, and return them in an array as well. I wrote the GenericUDF (as below), and it seems to work but: 1) It does not work when I am performing this on an external table, it works fine on a managed table, any idea? 2) I am having a tough time writing a test on this. I have attached the test I have so far, and it does not work, always getting 'java.util.ArrayList cannot be cast

How to create UDF from Scala methods (to compute md5)?

由 那年仲夏 提交于 2019-12-12 12:09:52
问题 I would like to build one UDF from two already working functions. I'm trying to calculate a md5 hash as a new column to an existing Spark Dataframe. def md5(s: String): String = { toHex(MessageDigest.getInstance("MD5").digest(s.getBytes("UTF-8")))} def toHex(bytes: Array[Byte]): String = bytes.map("%02x".format(_)).mkString("") Structure (what i have so far) val md5_hash: // UDF Implementation val sqlfunc = udf(md5_hash) val new_df = load_df.withColumn("New_MD5_Column", sqlfunc(col("Duration"

java udf for adding columns

由 别说谁变了你拦得住时间么 提交于 2019-12-12 06:09:44
问题 i am writing java udf function to add the pincode by comparing the locality column.here is my code. import java.io.IOException; import org.apache.pig.EvalFunc; import org.apache.pig.data.Tuple; import org.apache.commons.lang3.StringUtils; public class MB_pincodechennai extends EvalFunc<String> { private String pincode(String input) { String property_pincode = null; String[] items = new String[]{"600088", "600016", "600053", "600070", "600040", "600106", "632301", "600109", "600083", "600054",

UDF(Java): permission denied at HDFS

由 不问归期 提交于 2019-12-12 05:16:48
问题 I write an hive-UDTF to resolve ip address via loading a .dat file on HDFS,but meet an error: java.io.FileNotFoundException: hdfs:/THE_IP_ADDRESS:9000/tmp/ip_20170204.dat (Permission denied) But actually, both the dfs directory /tmp and the .data file have full access: 777 , and I cannot modify the config to disable dfs permission. The line in my UDTF to read the file: IP.load("hdfs://THE_IP_ADDRESS:9000/tmp/ip_20170204.dat"); and the static method .load() : public static void load(String

Error while setting UDF description in VBA

由 孤街浪徒 提交于 2019-12-12 04:36:09
问题 I am trying to Make a description for my user defined functions. I had no problem using this code: Sub RegisterUDF23() Dim FD As String FD = "Find the CN value based on landuse and soil type" & vbLf _ & "CNLookup(Landuse As Integer, SoilType As String) As Integer" Application.MacroOptions macro:="CNLookup", Description:=FD, Category:=14 _ , ArgumentDescriptions:=Array( _ "Integer: (1 to 7)", "String: ""A"", ""B"", ""C"", ""D"" ") End Sub But When I moved to 24th function and wanted to do the

How to Call SQLite User Defined Function with C# LINQ Query

由 只谈情不闲聊 提交于 2019-12-12 03:44:35
问题 With SQLite and C#, has anyone tried calling a UDF within a LINQ query? Searching online, I found this about creating a UDF function in C# http://www.ivankristianto.com/howto-make-user-defined-function-in-sqlite-ado-net-with-csharp/ As for calling a function in LINQ to Entities, I have the solution here Calling DB Function with Entity Framework 6 Here's what I got so far. I create my database model and linq to SQLite. I add this into the database model file: <Function Name="fn

Native Impala UDF (Cpp) randomly gives result as NULL for same inputs in the same table for multiple invocations in same query

由 烈酒焚心 提交于 2019-12-11 19:23:21
问题 I have a Native Impala UDF (Cpp) with two functions Both functions are complimentary to each other. String myUDF(BigInt) BigInt myUDFReverso(String) myUDF("myInput") gives some output which when myUDFReverso(myUDF("myInput")) should give back myInput When I run a impala query on a parquet table like this, select column1,myUDF(column1),length(myUDF(column1)),myUDFreverso(myUDF(column1)) from my_parquet_table order by column1 LIMIT 10; The output is NULL at random. The output is say at 1st run
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