1、代码开发 package cn.itcast.sparksql import org.apache.spark.SparkContext import org.apache.spark.rdd.RDD import org.apache.spark.sql.{Column, DataFrame, SparkSession} //TODO:利用反射将rdd转换成DataFrame //定义一个样例类 case class Person(id:Int,name:String,age:Int) // object CaseClassSch...
下面是整个解决方案的完整代码: importorg.apache.spark.sql.SparkSessionimportorg.apache.spark.sql.functions.udfimportjava.math.BigDecimalvalspark=SparkSession.builder().appName("Decimal Multiplication").getOrCreate()valdf=spark.read.format("csv").option("header","true").load("path/to/data.csv")v...
如果Spark SQL要以Parquet输出并且结果会被不支持新格式的其他系统使用的话,需要设置为true。 比如,对于decimal数据类型的兼容处理,不设置true时,经常会报类似如下的错误: Job aborted due to stage failure: Task 0 in stage 0.0 failed 1 times, most recent failure: Lost task 0.0 in stage 0.0 (TID 0, l...
如题,Spark2.x之SparkSql读取MySQL数据中Decimal类型如何读取? 我在读取MySQL数据时有个字段是Decimal字段,SparkSql,getAs[BigDecimal]出现报错,具体报错信息如下:java.lang.ClassCastException: java.math.BigDecimal cannot be cast to scala.math.BigDecimalsparksql代码如下val filtered: Dataset[Row] = orders.filter...
spark.sql.AnalysisException:无法提取需要结构类型的值，但获得了decimal(38,18)“这可能是因为spark和...
Task 0 in stage 0.0 failed 4 times, most recent failure: Lost task 0.3 in stage 0.0 (TID 4) (10.20.192.76 executor 0): org.apache.spark.SparkException: [INTERNAL_ERROR] Negative scale is not allowed: -1. Set the config "spark.sql.legacy.allowNegativeScaleOfDecimal" to "true" to allo...
SparkSQL函数需要类型Decimal 、、、 我设计了以下函数来处理任何数值类型的数组:// Registerscan be used in SQL statements.但是想要传递一个类型为data type mismatch: argument 1 requires array<do 浏览3提问于2016-03-15得票数3 回答已采纳 2回答 ...
In the case of Spark, it throws an error: spark.sql("select round(99999999999999999999999999999999999999, -1)").show() org.apache.spark.SparkArithmeticException: [DECIMAL_PRECISION_EXCEEDS_MAX_PRECISION] Decimal precision 39 exceeds max precision 38. ...
spark.sql("select CAST(amt_double AS DECIMAL(3,3)) AS dec_col from dec_table").show() Solution This is a known issue and can be safely ignored. The error message does not halt the notebook run and it should not result in any data loss....
mybaits动态SQL中的DECIMAL 数据库:mysql 数据库字段类型:decimal(11,2) java程序类型:java.math.BigDecimal 使用mybatis的动态语句 <if test ="money!= null>,money</if> 问题点:如果money传入的是0,那么动态语句也直接当做null处理 解释: DECIMAL是压缩的“严格”定点数。null时取得的值是0,反过来0传入的时候...