importcom.alibaba.druid.sql.SQLUtils;importcom.alibaba.druid.sql.ast.SQLObject;importcom.alibaba.druid.sql.ast.SQLStatement;importcom.alibaba.druid.sql.ast.statement.*;importcom.alibaba.druid.sql.dialect.hive.visitor.HiveSchemaStatVisitor;importjava.util.List;publicclassDruidTest{publicstatic void main(...
//调用的主函数是parse override def parsePlan(sqlText: String): LogicalPlan = parse(sqlText) { parser => //从 singleStatement 结点开始,遍历语法树,将结点转换为逻辑计划 astBuilder.visitSingleStatement(parser.singleStatement()) match { case plan: LogicalPlan => plan case _ => val position = ...
setState public SparkStatement setState(LivyStatementStates state) Set the state property: The state property. Parameters: state - the state value to set. Returns: the SparkStatement object itself.Applies to Azure SDK for Java Preview在GitHub 上與我們協作 可以在 GitHub 上找到此内容的源,还...
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if (_sc == null) { throw new SparkException( "此RDD缺少SparkContext。可能出现以下情况:\n(1)RDD转换和操作未由驱动程序调用,而是在其他转换中执行;例如,rdd1.map(x => rdd2.values.count() * x)是无效的,因为values转换和count操作无法在rdd1.map转换中执行。有关更多信息,请参阅SPARK-5063。\n(...
dstream.foreachRDD(rdd=>{if(!rdd.isEmpty){rdd.foreachPartition(partitionRecords=>{//从连接池中获取一个连接val conn=MysqlManager.getMysqlManager.getConnection val statement=conn.createStatementtry{conn.setAutoCommit(false)partitionRecords.foreach(record=>{val sql="insert into table..."// 需要执行...
SparkSqlParser没有该方法的实现,具体是现在其父类 AbstractSqlParser中,如下: /**Creates LogicalPlan for a given SQL string.*///TODO 根据 sql语句生成 逻辑计划 LogicalPlanoverride def parsePlan(sqlText: String): LogicalPlan = parse(sqlText) { parser =>val singleStatementContext: SqlBaseParser.Sin...
Spark SQL里面有很多的参数,而且这些参数在Spark官网中没有明确的解释,可能是太多了吧,可以通过在spark-sql中使用set -v 命令显示当前spark-sql版本支持的参数。 本文讲解最近关于在参与hive往spark迁移过程中遇到的一些参数相关问题的调优。 内容分为两部分,第一部分讲遇到异常,从而需要通过设置参数来解决的调优;第二...
具体元素:SqlBaseParser.SingleExpressionContext/SqlBaseParser./... 核心代码(ParseDriver.scala): //柯里化overridedefparsePlan(sqlText:String):LogicalPlan=parse(sqlText){parser=>//生成Ast-treevalctx:SqlBaseParser.SingleStatementContext=parser.singleStatement()println("===打印AST-Tree===")println(ctx...
However, if ';' is the end of the line, it terminates the SQL statement. The example above will be terminated into `/* This is a comment contains ` and `*/ SELECT 1`, Spark will submit these two commands separated and throw parser error (`unclosed bracketed comment` and `Syntax error...