Flink最锋利的武器---FlinkSQL入门和实战_技术问答

weixin_慕慕0342936

pom文件需要依赖哪些包呀？: 2024-04-24 0回答·94浏览

慕姐2240360

最后一个实战消费卡夫卡的有成功的吗，运行无法成功: 2022-12-12 0回答·311浏览

慕姐2240360

关于flink-streaming-java 1.10.1这个版本已经不存在了，好多仓库都不存在了，好尴尬，立马的课程内容没法实战了: 2022-11-21 0回答·337浏览

JAVA_进阶

flinksql 如何将逗号拼接的一行数据转化成多行？: 2022-07-23 0回答·618浏览

浙江卫

有源码嘛？

https://github.com/apache/flink/tree/blink

开源了，目前是 flink 的一个分支

2022-05-17 1回答·419浏览

qq_从心开始_17

可以上传一下代码吗: 2020-12-31 1回答·598浏览

qq_慕虎9286591

关于flink的pom文件配置

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>

   <groupId>org.myorg.quickstart</groupId>
   <artifactId>quickstart</artifactId>
   <version>0.1</version>
   <packaging>jar</packaging>

   <name>Flink Quickstart Job</name>

   <properties>
      <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
      <flink.version>1.10.1</flink.version>
      <java.version>1.8</java.version>
      <scala.binary.version>2.11</scala.binary.version>
      <maven.compiler.source>${java.version}</maven.compiler.source>
      <maven.compiler.target>${java.version}</maven.compiler.target>
   </properties>

   <repositories>
      <repository>
         <id>apache.snapshots</id>
         <name>Apache Development Snapshot Repository</name>
         <url>https://repository.apache.org/content/repositories/snapshots/</url>
         <releases>
            <enabled>false</enabled>
         </releases>
         <snapshots>
            <enabled>true</enabled>
         </snapshots>
      </repository>
   </repositories>

   <dependencies>
      <!-- Apache Flink dependencies -->
      <!-- These dependencies are provided, because they should not be packaged into the JAR file. -->
      <dependency>
         <groupId>org.apache.flink</groupId>
         <artifactId>flink-java</artifactId>
         <version>${flink.version}</version>
         <scope>provided</scope>
      </dependency>
      <dependency>
         <groupId>org.apache.flink</groupId>
         <artifactId>flink-streaming-java_${scala.binary.version}</artifactId>
         <version>${flink.version}</version>
         <scope>provided</scope>
      </dependency>

      <dependency>
         <groupId>org.slf4j</groupId>
         <artifactId>slf4j-log4j12</artifactId>
         <version>1.7.7</version>
         <scope>runtime</scope>
      </dependency>
      <dependency>
         <groupId>log4j</groupId>
         <artifactId>log4j</artifactId>
         <version>1.2.17</version>
         <scope>runtime</scope>
      </dependency>
   </dependencies>

   <build>
      <plugins>

         <!-- Java Compiler -->
         <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.1</version>
            <configuration>
               <source>${java.version}</source>
               <target>${java.version}</target>
            </configuration>
         </plugin>

         <!-- We use the maven-shade plugin to create a fat jar that contains all necessary dependencies. -->
         <!-- Change the value of <mainClass>...</mainClass> if your program entry point changes. -->
         <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-shade-plugin</artifactId>
            <version>3.1.1</version>
            <executions>
               <!-- Run shade goal on package phase -->
               <execution>
                  <phase>package</phase>
                  <goals>
                     <goal>shade</goal>
                  </goals>
                  <configuration>
                     <artifactSet>
                        <excludes>
                           <exclude>org.apache.flink:force-shading</exclude>
                           <exclude>com.google.code.findbugs:jsr305</exclude>
                           <exclude>org.slf4j:*</exclude>
                           <exclude>log4j:*</exclude>
                        </excludes>
                     </artifactSet>
                     <filters>
                        <filter>
                           <!-- Do not copy the signatures in the META-INF folder.
                           Otherwise, this might cause SecurityExceptions when using the JAR. -->
                           <artifact>*:*</artifact>
                           <excludes>
                              <exclude>META-INF/*.SF</exclude>
                              <exclude>META-INF/*.DSA</exclude>
                              <exclude>META-INF/*.RSA</exclude>
                           </excludes>
                        </filter>
                     </filters>
                     <transformers>
                        <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                           <mainClass>org.myorg.quickstart.StreamingJob</mainClass>
                        </transformer>
                     </transformers>
                  </configuration>
               </execution>
            </executions>
         </plugin>
      </plugins>

      <pluginManagement>
         <plugins>

            <!-- This improves the out-of-the-box experience in Eclipse by resolving some warnings. -->
            <plugin>
               <groupId>org.eclipse.m2e</groupId>
               <artifactId>lifecycle-mapping</artifactId>
               <version>1.0.0</version>
               <configuration>
                  <lifecycleMappingMetadata>
                     <pluginExecutions>
                        <pluginExecution>
                           <pluginExecutionFilter>
                              <groupId>org.apache.maven.plugins</groupId>
                              <artifactId>maven-shade-plugin</artifactId>
                              <versionRange>[3.1.1,)</versionRange>
                              <goals>
                                 <goal>shade</goal>
                              </goals>
                           </pluginExecutionFilter>
                           <action>
                              <ignore/>
                           </action>
                        </pluginExecution>
                        <pluginExecution>
                           <pluginExecutionFilter>
                              <groupId>org.apache.maven.plugins</groupId>
                              <artifactId>maven-compiler-plugin</artifactId>
                              <versionRange>[3.1,)</versionRange>
                              <goals>
                                 <goal>testCompile</goal>
                                 <goal>compile</goal>
                              </goals>
                           </pluginExecutionFilter>
                           <action>
                              <ignore/>
                           </action>
                        </pluginExecution>
                     </pluginExecutions>
                  </lifecycleMappingMetadata>
               </configuration>
            </plugin>
         </plugins>
      </pluginManagement>
   </build>
</project>

2020-08-01 2回答·1581浏览

Eustass

～～～: 2020-07-07 0回答·696浏览

梦里驾月渡银河

如果表数据太大，这样会不会把数据一次性都加载到内存去呢？: 不会，大表少则几十G,大的上T的数据，内存有怎么扛得住？; 2020-05-15 1回答·1124浏览

Benson2018

用table方式统计的效率会不会降低: 我认为，应该是比直接用算子要慢一些吧。; 2019-12-28 1回答·739浏览

qq_水刃木石页_0

解析SingleOutputStreamOperator: https://blog.csdn.net/huobumingbai1234/article/details/113838058; 2019-12-10 1回答·6185浏览

qq__inruIR

这个自定义函数怎么用啊？是开发好了测试通过之后直接打包上传到flink服务器对应的位置上，然后直接调用jar包，还是说放在代码中作为一个工具类，其他的流计算类操作的时候再调用这个工具类?: 需要注册到环境里面; 2019-12-05 1回答·952浏览

天秋

flink-table 无法使用: 添加 flink-scala flink-stream-scala; 2019-11-13 1回答·1095浏览

东围居士

程序没有运行成功: 2019-11-10 2回答·669浏览

东围居士

示例数据要到哪里下载？

17-18,詹姆斯-哈登,72,8.8,1.8,0.7,30.4

16-17,拉塞尔-维斯布鲁克,81,10.4,1.6,0.4,31.6

15-16,斯蒂芬-库里,79,6.7,2.1,0.2,30.1

14-15,拉塞尔-维斯布鲁克,67,8.6,2.1,0.2,28.1

13-14,凯文-杜兰特,81,5.5,1.3,0.7,32

12-13,卡梅罗-安东尼,67,2.6,0.8,0.5,28.7

11-12,凯文-杜兰特,66,3.5,1.3,1.2,28

10-11,凯文-杜兰特,78,2.7,1.1,1,27.7

09-10,凯文-杜兰特,82,2.8,1.4,1,30.1

08-09,德维恩-韦德,79,7.5,2.2,1.3,30.2

07-08,勒布朗-詹姆斯,75,7.2,1.8,1.1,30

06-07,科比-布莱恩特,77,5.4,1.4,0.5,31.6

05-06,科比-布莱恩特,80,4.5,1.8,0.4,35.4

04-05,阿仑-艾佛森,75,7.9,2.4,0.1,30.7

03-04,特雷西-麦克格雷迪,67,5.5,1.4,0.6,28

02-03,特雷西-麦克格雷迪,75,5.5,1.7,0.8,32.1

01-02,阿仑-艾佛森,60,5.5,2.8,0.2,31.4

00-01,阿仑-艾佛森,71,4.6,2.5,0.3,31.1

99-00,沙奎尔-奥尼尔,79,3.8,0.5,3,29.7

98-99,阿仑-艾佛森,48,4.6,2.3,0.1,26.8

97-98,迈克尔-乔丹,82,3.5,1.7,0.5,28.7

96-97,迈克尔-乔丹,82,4.3,1.7,0.5,29.6

95-96,迈克尔-乔丹,82,4.3,2.2,0.5,30.4

94-95,沙奎尔-奥尼尔,79,2.7,0.9,2.4,29.3

93-94,大卫-罗宾逊,80,4.8,1.7,3.3,29.8

92-93,迈克尔-乔丹,78,5.5,2.8,0.8,32.6

91-92,迈克尔-乔丹,80,6.1,2.3,0.9,30.1

90-91,迈克尔-乔丹,82,5.5,2.7,1,31.5

89-90,迈克尔-乔丹,82,6.3,2.8,0.7,33.6

88-89,迈克尔-乔丹,81,8,2.9,0.8,32.5

87-88,迈克尔-乔丹,82,5.9,3.2,1.6,35

86-87,迈克尔-乔丹,82,4.6,2.9,1.5,37.1

85-86,多米尼克-威尔金斯,78,2.6,1.8,0.6,30.3

84-85,伯纳德-金,55,3.7,1.3,0.3,32.9

83-84,阿德里安-丹特利,79,3.9,0.8,0.1,30.6

82-83,阿历克斯-英格利什,82,4.8,1.4,1.5,28.4

81-82,乔治-格文,79,2.4,1,0.6,32.3

2019-11-10 2回答·806浏览

阿卡卡二

BatchTableEnvironment方法过时了怎么办

import org.apache.flink.table.api.*; 
import static org.apache.flink.table.api.Expressions.*; 
EnvironmentSettings settings = EnvironmentSettings.newInstance().inStreamingMode().build(); 
TableEnvironment tEnv = TableEnvironment.create(env);

官方文档

2019-08-19 3回答·2654浏览

慕函数7199728

sql单词统计

不用类封装，如果是Java开发的话用Tuple2就好了，如果是用scala这个都不需要，直接链式编程

2019-07-31 1回答·730浏览

boyideyt

pom在哪节课讲的？: 百度一下，值得拥有; 2019-07-15 1回答·762浏览

慕侠2543623

kafka zookeeper 这个是在本地环境安装的？: 是的，本机localhost; 2019-07-10 1回答·659浏览

moyousheng3836159

源码怎么下载呀: 直接maven 项目不就可以了么; 2019-06-30 2回答·533浏览

幸福谷

为什么要重写map方法啊: 已采纳请用手机端下载视频的回答; 在这没有任何意义，就是给你演示一下。执行个算子给你看看而已。为了代表实际生产中的一些了转换; 2019-06-29 2回答·989浏览

加速昘埕侙

找不到org.apache.flink.api.scala.ExecutionEnvironment的类文件: org.apache.flink.api.scala.ExecutionEnvironment
这个类是scala版本的批处理api包，你需要引入依赖flink-scala_2.11; 2019-06-28 3回答·3840浏览

加速昘埕侙

求项目源码地址: https://github.com/apache/flink/tree/master/flink-examples/flink-examples-table; 2019-06-28 1回答·693浏览

Flink最锋利的武器---FlinkSQL入门和实战

org.apache.flink.api.scala.ExecutionEnvironment