declare @month int = month(getdate()) declare @day int = day(getdate()) select @year as year,@month as month,@day as day 1. 2. 3. 4. 5. (Common Questions about SQL convert date in SQL Server) Note: The following link contains FAQ about functions and dates in SQL Server: FAQ...
PARSING) { // SessionState的SQL Parser负责解析SQL,并生成解析的执行计划 // 接口定义为:def parsePlan(sqlText: String): LogicalPlan sessionState.sqlParser.parsePlan(sqlText) } // 生成物理执行计划并生成DataSet(就是DataFrame) Dataset.ofRows(self, plan, tracker) } sql方法会调用Spark Session中的Se...
declare i int default 0; while i<=n; do set sum=sum+i; set i=i+1; end while; return sum; end // delimiter ; select myfunction(10); 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 其他循环:sql没有for循环,有repeat和loop循环。 存储过程 存储过程:stored procedu...
| | It works like this: a POM may declare a repository to use in resolving certain artifacts. | However, this repository may have problems with heavy traffic at times, so people have mirrored | it to several places. | | That repository definition will have a unique id, so we can ...
Spark3.4.0 安装与Spark相关的其他组件的时候,例如Hadoop,Scala,Hive,Kafka等,要考虑到这些组件和Spark的版本兼容关系。这个对应关系可以在Spark源代码的pom.xml文件中查看。 https://github.com/apache/spark/commits
-- https://mvnrepository.com/artifact/org.apache.spark/spark-sql --><dependency><groupId>org.apache.spark</groupId><artifactId>spark-sql_2.11</artifactId><version>2.3.1</version></dependency><!-- kafka组件--><dependency><groupId>org.apache.spark</groupId><artifactId>spark-streaming-...
Spark输出概述 “Spark输出”算子,用于配置已生成的字段输出到SparkSQL表的列。 输入与输出输入:需要输出的字段输出:SparkSQL表 参数说明 表1 算子参数说明 参数 含义 类型 是否必填 默认值 Spark文件存储格式 配置SparkSQL表文件的存储 来自:帮助中心 查看更多 → ...
<!-- Needed by sql/hive tests. --> <test.src.tables>src</test.src.tables> <hive.conf.validation>false</hive.conf.validation> </systemPropertyVariables> <failIfNoTests>false</failIfNoTests> <failIfNoSpecifiedTests>false</failIfNoSpecifiedTests> <excludedGroups>${test.exclude.tags...
For the javascript evaluation following variables are available by default: variableScala Type sessionorg.apache.spark.sql.SparkSession logicalPlanorg.apache.spark.sql.catalyst.plans.logical.LogicalPlan executedPlanOptOption[org.apache.spark.sql.execution.SparkPlan] ...
SHOW VARIABLES LIKE 'character%' -- 存储过程的控制语句 CREATE TABLE t( id INT(10) ); INSERT INTO t VALUES(10); DELIMITER $$ CREATE PROCEDURE proc03(IN innum INT) BEGIN DECLARE var INT; -- 定义变量var为int类型 SET var = innum * 2; -- 设置变量的值等于传入的参数值乘2 ...