Iceberg实战踩坑指南-Toy模板网

这篇具有很好参考价值的文章主要介绍了Iceberg实战踩坑指南。希望对大家有所帮助。如果存在错误或未考虑完全的地方，请大家不吝赐教，您也可以点击"举报违法"按钮提交疑问。

前言

第 1 章介绍

第 2 章构建 Iceberg

第 3 章 Spark 操作

3.1.配置参数和 jar 包

3.2 Spark sql 操作

编辑

3.2.1over write 操作

3.2.2动态覆盖

编辑

3.2.3静态覆盖

3.2.4删除数据

3.2.5历史快照

3.2.6隐藏分区（有 bug 时区不对）

第 4 章 DataFrame 操作

4.1.配置 Resources

4.2配置 pom.xml

4.3读取表

4.4读取快照

4.5写入表

4.5.1写入数据并创建表

4.5.1写数据

4.6模拟数仓

4.6.1表模型

4.6.2建表语句

4.6.3测试数据

4.6.5 yarn 测试

第 5 章 Structured Streaming 操作

5.1 基于 Structured Streaming 落明细数据

5.1.1创建测试 topic

5.3 编写代码

5.4 提交 yarn 测试速度

编辑第 6 章存在的问题和缺点

6.1问题

6.2缺点

第 7 章 Flink 操作

7.1配置参数和 jar 包

7.2 Flink SQL Client

7.3 使用 Catalogs 创建目录

7.4 Flink SQL 操作

7.4.1建库

7.4.2建表（flink 不支持隐藏分区）

7.4.3 like 建表

7.4.4 insert into

7.4.5查询

7.4.6任务监控

第 8 章 Flink API 操作

8.1配置 pom.xml

8.2.1读取表数据

8.3写数据

8.3.1Appending Data

编辑

8.3.3Overwrite Data

8.4模拟数仓

第 9 章 Flink 存在的问题

前言

本文基于Iceberg0.11.1版本

第 1 章介绍

Apache Iceberg 是一种用于大型分析数据集的开放表格，Iceberge 向 Trino 和 Spark 添加了使用高性能格式的表，就像 Sql 表一样。

Iceberg 为了避免出现不变要的一些意外，表结构和组织并不会实际删除，用户也不需要特意了解分区便可进行快速查询。

Iceberg 的表支持快速添加、删除、更新或重命名操作
将分区列进行隐藏，避免用户错误的使用分区和进行极慢的查询。
分区列也会随着表数据量或查询模式的变化而自动更新。
表可以根据时间进行表快照，方便用户根据时间进行检查更改。
提供版本回滚，方便用户纠错数据。

Iceberg 是为大表而建的，Iceberg 用于生产中，其中单表数据量可包含 10pb 左右数据，甚至可以在没有分布式 SQL 引擎的情况下读取这些巨量数据。

查询计划非常迅速，不需要分布式 SQL 引擎来读取数据
高级过滤：可以使用分区和列来过滤查询这些数据
可适用于任何云存储
表的任何操作都是原子性的，用户不会看到部分或未提交的内容。
使用多个并发器进行写入，并使用乐观锁重试的机制来解决兼容性问题

本文demo基于 0.11.1 版本较老，iceberg官网已经没有该版本样例了，同时改版本也不支持一些iceberg的新特性，比如：upsert功能，动态schema变更以及索引和小文件合并等问题。但是不影响对主要API和功能的学习和理解

第 2 章构建 Iceberg

构建 Iceberge 需要 Grade 5.41 和 java8 或 java11 的环境

2.1 构建 Iceberg

1.上传 iceberg-apache-iceberg-0.11.1.zip，并进行解压

[root@hadoop103 software]# unzip iceberg-apache-iceberg-0.11.1.zip -d /opt/module/ 
[root@hadoop103 software]# cd /opt/module/iceberg-apache-iceberg-0.11.1/

2.修改对应版本

[root@hadoop103 iceberg-apache-iceberg-0.11.1]# vim versions.props org.apache.flink:* = 1.11.0
org.apache.hadoop:* = 3.1.3
org.apache.hive:hive-metastore = 2.3.7

org.apache.hive:hive-serde = 2.3.7
org.apache.spark:spark-hive_2.12 = 3.0.1
org.apache.hive:hive-exec = 2.3.7
org.apache.hive:hive-service = 2.3.7

3.修改国内镜像

[root@hadoop103 iceberg-apache-iceberg-0.11.1]# vim build.gradle buildscript {
repositories { jcenter() gradlePluginPortal()
maven{ url 'http://maven.aliyun.com/nexus/content/groups/public/' } maven{ url 'http://maven.aliyun.com/nexus/content/repositories/jcenter'} maven { url "http://palantir.bintray.com/releases" }
maven { url "https://plugins.gradle.org/m2/" }
}

allprojects {
group = "org.apache.iceberg" version = getProjectVersion() repositories {
maven{ url 'http://maven.aliyun.com/nexus/content/groups/public/'} maven{ url 'http://maven.aliyun.com/nexus/content/repositories/jcenter'} maven { url "http://palantir.bintray.com/releases" }
mavenCentral() mavenLocal()
}
}

4.构建项目

[root@hadoop103 iceberg-apache-iceberg-0.11.1]# ./gradlew build -x test

第 3 章 Spark 操作

3.1.配置参数和 jar 包

1.将构建好的 Iceberg 的 spark 模块 jar 包，复制到 spark jars 下

[root@hadoop103]/opt/module/iceberg-apache-iceberg-0.11.1/spark3-extensions/build/libs/ [root@hadoop103 libs]# cp *.jar /opt/module/spark-3.0.1-bin-hadoop2.7/jars/ [root@hadoop103	libs]#	cd
/opt/module/iceberg-apache-iceberg-0.11.1/spark3-runtime/build/libs/
[root@hadoop103 libs]# cp *.jar /opt/module/spark-3.0.1-bin-hadoop2.7/jars/

2.配置 spark 参数，配置 Spark Sql Catlog，可以用两种方式，基于 hive 和基于 hadoop,这里先选择基于 hadoop。

[root@hadoop103 libs]# cd /opt/module/spark-3.0.1-bin-hadoop2.7/conf/ 
[root@hadoop103 conf]# vim spark-defaults.conf spark.sql.catalog.hive_prod = org.apache.iceberg.spark.SparkCatalog spark.sql.catalog.hive_prod.type = hive spark.sql.catalog.hive_prod.uri = thrift://hadoop101:9083


spark.sql.catalog.hadoop_prod = org.apache.iceberg.spark.SparkCatalog 
spark.sql.catalog.hadoop_prod.type = hadoop


spark.sql.catalog.hadoop_prod.warehouse = hdfs://mycluster/spark/warehouse


spark.sql.catalog.catalog-name.type = hadoop spark.sql.catalog.catalog-name.default-namespace = db spark.sql.catalog.catalog-name.uri = thrift://hadoop101:9083
spark.sql.catalog.catalog-name.warehouse= hdfs://mycluster/spark/warehouse

3.2 Spark sql 操作

正在上传…重新上传取消使用 spark sql 创建 iceberg 表,配置完毕后，会多出一个 hadoop_prod.db 数据库，但是注意这个数据库通过 show tables 是看不到的

[root@hadoop103 ~]# spark-sql
spark-sql (default)> use hadoop_prod.db; create table testA(
id bigint, name string, age int,
dt string) USING iceberg
PARTITIONED by(dt);

2.插入数据

spark-sql (default)> insert into testA values(1,'张三',18,'2021-06-21');

3.查询

spark-sql (default)> select *from testA;

3.2.1over write 操作

（1）覆盖操作与 hive 一样，会将原始数据重新刷新

spark-sql (default)> insert overwrite testA values(2,'李四',20,'2021-06-21'); 
spark-sql (default)> select *from testA;

Iceberg实战踩坑指南

3.2.2动态覆盖

1.Spark 的默认覆盖模式是静态的，但在写入 iceberg 时建议使用动态覆盖模式。静态覆盖模式需要制定分区列，动态覆盖模式不需要。

spark-sql (default)> insert overwrite testA values(2,'李四',20,'2021-06-21'); 
spark-sql (default)> select *from testA;

Iceberg实战踩坑指南

2.设置动态覆盖模式，修改 spark-default.conf，添加对应参数

[root@hadoop103 conf]# vim spark-defaults.conf 
spark.sql.sources.partitionOverwriteMode=dynamic

3.创建一张表结构与 testA 完全一致的表 testB

create table hadoop_prod.db.testB( id bigint,
name string, age int,
dt string) USING iceberg
PARTITIONED by(dt);

4.向 testA 表中再插入一条数据

spark-sql (default)> use hadoop_prod.db;

spark-sql (default)> insert into testA values(1,'张三',18,'2021-06-22');

5.查询 testA 表，此时 testA 表中有两条记录

spark-sql (default)> select *from testA;

Iceberg实战踩坑指南
6.通过动态覆盖模式将 A 表插入到 B 表中

spark-sql (default)> insert overwrite testB select *from testA;

7.查询 testB 表，可以看到效果与 hive 中的动态分区一样，自动根据列的顺序进行匹配插入，无须手动指定分区。

spark-sql (default)> select *from testB;

Iceberg实战踩坑指南

3.2.3静态覆盖

1.静态覆盖，则跟 hive 插入时手动指定分区一致，需要手动指定分区列的值

spark-sql (default)> insert overwrite testB Partition(dt='2021-06-26') 
select id,name,age from testA;

2.查询表数据

spark-sql (default)> select *from testB;

Iceberg实战踩坑指南

3.2.4删除数据

1.iceberg 并不会物理删除数据，下面演示 delete 操作，根据分区列进行删除 testB 表数据

spark-sql (default)> delete from testB where dt >='2021-06-21' and dt <='2021-06-26';

2.提示删除成功，再次查询数据。发现表中已无数据，但是存在 hdfs 上的物理并没有实际删除

Iceberg实战踩坑指南

3.查看 hdfs 数据，仍然存在。

Iceberg实战踩坑指南

3.2.5历史快照

1.每张表都拥有一张历史表，历史表的表名为当前表加上后缀.history，注意：查询历史表的时候必须是表的全称，不可用先切到 hadoop.db 库中再查 testB

spark-sql (default)> select *from hadoop_prod.db.testB.history;

Iceberg实战踩坑指南

2.可以查看到每次操作后的对应的快照记录，也可以查询对应快照表，快照表的表名在原表基础上加上.snapshots，也是一样必须是表的全称不能简写

spark-sql (default)> select *from hadoop_prod.db.testB.snapshots;

Iceberg实战踩坑指南

3.可以在看到 commit 的时间，snapshot 快照的 id，parent_id 父节点，operation 操作类型，已经 summary 概要，summary 概要字段中可以看到数据量大小，总条数，路径等信息。

两张表也可以根据 snapshot_id 快照 id 进行 join 关联查询。

spark-sql	(default)>	select	*from	hadoop_prod.db.testB.history	a	join hadoop_prod.db.testB.snapshots b on a.snapshot_id=b.snapshot_id ;

Iceberg实战踩坑指南

4.知道了快照表和快照信息后，可以根据快照 id 来查询具体的历史信息，发进行检测是否误操作，如果是误操作则可通过 spark 重新刷新数据。查询方式如下

scala>
spark.read.option("snapshot-id","5549650043576786799").format("iceberg").load("/hive/w arehouse/db/testB").show

Iceberg实战踩坑指南

3.2.6隐藏分区（有 bug 时区不对）

1.days 函数

1）上面演示了创建分区表，接下来演示创建隐藏分区表。隐藏分区支持的函数有 years,months,days,hours,bucket,truncate。比如接下来创建一张 testC 表，表中有id,name 和 ts时间戳。

create table hadoop_prod.db.testC(
id bigint, name string, ts timestamp) using iceberg
partitioned by (days(ts));

2）创建成功分别往里面插入不同天时间戳的数据

spark-sql (default)> insert into hadoop_prod.db.testC values(1,'张三',cast(1624773600 as timestamp)),(2,'李四',cast(1624860000 as timestamp));

3）插入成功之后再来查询表数据。

spark-sql (default)> select *from hadoop_prod.db.testC;

4）可以看到有两条数据，并且日期也不是同一天，查看 hdfs 上对应的分区。已经自动按天进行了分区。

Iceberg实战踩坑指南

2.years 函数

1）删除 testC 表，重新建表，字段还是不变，分区字段使用 years 函数

spark-sql (default)> drop table hadoop_prod.db.testC; create table hadoop_prod.db.testC(
id bigint, name string, ts timestamp) using iceberg
partitioned by (years(ts));

2）同样，插入两条不同年时间戳的数据，进行查询对比

spark-sql (default)> insert into hadoop_prod.db.testC values(1,'张三',cast(1624860000 as timestamp)),(2,'李四',cast(1593324000 as timestamp));

3）查询数据

spark-sql (default)> select *from hadoop_prod.db.testC;

Iceberg实战踩坑指南

4）再查看 hdfs 对应的地址，已经按年建好分区

Iceberg实战踩坑指南

3.month 函数

1）删除 testC 表，重新建表，字段不变，使用 month 函数进行分区

spark-sql (default)> drop table hadoop_prod.db.testC; create table hadoop_prod.db.testC(
id bigint, name string, ts timestamp) using iceberg
partitioned by (months(ts));

2）同样，插入不同月份时间戳的两条记录

spark-sql (default)> insert into hadoop_prod.db.testC values(1,'张三',cast(1624860000 as timestamp)),(2,'李四',cast(1622181600 as timestamp));

3）查询数据和 hdfs 对应地址

spark-sql (default)> select *from hadoop_prod.db.testC;

4.hours 函数

1）删除 testC 表，重新建表，字段不变使用 hours 函数

spark-sql (default)> drop table hadoop_prod.db.testC; create table hadoop_prod.db.testC(
id bigint, name string, ts timestamp) using iceberg
partitioned by (hours(ts));

2）插入两条不同小时的时间戳数据

spark-sql (default)> insert into hadoop_prod.db.testC values(1,'张三',cast(1622181600 as timestamp)),(2,'李四',cast(1622178000 as timestamp));

3）查询数据和 hdfs 地址

spark-sql (default)> select *from hadoop_prod.db.testC;

Iceberg实战踩坑指南

4)发现时区不对，修改对应参数

root@hadoop103 ~]# vim /opt/module/spark-3.0.1-bin-hadoop2.7/conf/spark-defaults.conf spark.sql.session.timeZone=GMT+8

5)再次启动 spark sql 插入数据

[root@hadoop103 ~]# spark-sql
spark-sql (default)> insert into hadoop_prod.db.testC values(1,'张三',cast(1622181600 as timestamp)),(2,'李四',cast(1622178000 as timestamp));

6)查看 hdfs 路径,还是错误分区目录（bug）

5.bucket 函数（有 bug）

1)删除 testC 表，重新创建，表字段不变，使用 bucket 函数。分桶 hash 算法采用 Murmur3 hash，官网介绍 https://iceberg.apache.org/spec/#partition-transforms

spark-sql (default)> drop table hadoop_prod.db.testC; create table hadoop_prod.db.testC(
id bigint, name string, ts timestamp) using iceberg
partitioned by (bucket(16,id));

2)插入一批测试数据,为什么分多批插入，有 bug:如果一批数据中有数据被分到同一个桶里会报错

insert into hadoop_prod.db.testC values
(1,'张 1',cast(1622152800 as timestamp)),(1,'李 1',cast(1622178000 as timestamp)), (2,'张 2',cast(1622152800 as timestamp)),(3,'李 2',cast(1622178000 as timestamp)), (4,'张 3',cast(1622152800 as timestamp)),(6,'李 3',cast(1622178000 as timestamp)), (5,'张 4',cast(1622152800 as timestamp)),(8,'李 4',cast(1622178000 as timestamp)); insert into hadoop_prod.db.testC values
(9,'张 5',cast(1622152800 as timestamp)),(10,'李 5',cast(1622178000 as timestamp)), (11,'张 6',cast(1622152800 as timestamp)),(12,'李 6',cast(1622178000 as timestamp)); insert into hadoop_prod.db.testC values
(13,'张 7',cast(1622152800 as timestamp)),(14,'李 7',cast(1622178000 as timestamp)),
(15,'张 8',cast(1622152800 as timestamp)),(16,'李 8',cast(1622178000 as timestamp)); insert into hadoop_prod.db.testC values
(17,'张 9',cast(1622152800 as timestamp)),(18,'李 9',cast(1622178000 as timestamp)),
(18,'张 10',cast(1622152800 as timestamp)),(20,'李 10',cast(1622178000 as timestamp)); insert into hadoop_prod.db.testC values
(1001,'张 9',cast(1622152800 as timestamp)),(1003,'李 9',cast(1622178000 as timestamp)),
(1002,'张 10',cast(1622152800 as timestamp)),(1004,'李 10',cast(1622178000 as timestamp));

3)查看表数据和 hdfs 路径

spark-sql (default)> select *from hadoop_prod.db.testC;

Iceberg实战踩坑指南

spark-sql (default)> drop table hadoop_prod.db.testC; create table hadoop_prod.db.testC(
id bigint, name string, ts timestamp) using iceberg
partitioned by (truncate(4,id));

6.truncate 函数

1)删除表，重新建表，字段不变，使用 truncate 函数，截取长度来进行分区

spark-sql (default)> drop table hadoop_prod.db.testC; create table hadoop_prod.db.testC(
id bigint, name string, ts timestamp) using iceberg
partitioned by (truncate(4,id));

2)插入一批测试数据

insert into hadoop_prod.db.testC values
(10010001,' 张 1',cast(1622152800 as timestamp)),(10010002,' 李 1',cast(1622178000 as timestamp)),
(10010003,' 张 2',cast(1622152800 as timestamp)),(10020001,' 李 2',cast(1622178000     
as timestamp)),
(10020002,' 张 3',cast(1622152800 as timestamp)),(10030001,' 李 3',cast(1622178000  
as timestamp)),
(10040001,' 张 4',cast(1622152800 as timestamp)),(10050001,' 李 4',cast(1622178000 as timestamp));

3)查询表数据和 hdfs 地址,分区目录为 id 数/4 得到的值（计算方式是 /不是%）。

spark-sql (default)> select *from hadoop_prod.db.testC; Iceberg实战踩坑指南

Iceberg实战踩坑指南

第 4 章 DataFrame 操作

4.1.配置 Resources

1）将自己 hadoop 集群的客户端配置文件复制到 resource 下，方便 local 模式调试

Iceberg实战踩坑指南

4.2配置 pom.xml

1）配置相关依赖

<properties>
    <spark.version>3.0.1</spark.version>
    <scala.version>2.12.10</scala.version>
    <log4j.version>1.2.17</log4j.version>
    <slf4j.version>1.7.22</slf4j.version>
    <iceberg.version>0.11.1</iceberg.version>
</properties>

<dependencies>
    <!-- Spark 的依赖引入 -->
    <dependency>
        <groupId>org.apache.spark</groupId>
        <artifactId>spark-core_2.12</artifactId>
        <version>${spark.version}</version>
    </dependency>
    <dependency>
        <groupId>org.apache.spark</groupId>
        <artifactId>spark-sql_2.12</artifactId>
        <version>${spark.version}</version>
    </dependency>
    <dependency>
        <groupId>org.apache.spark</groupId>
        <artifactId>spark-hive_2.12</artifactId>
        <version>${spark.version}</version>
    </dependency>
    <!-- 引入Scala -->
    <dependency>
        <groupId>org.scala-lang</groupId>
        <artifactId>scala-library</artifactId>
        <version>${scala.version}</version>
    </dependency>

    <dependency>
        <groupId>org.apache.iceberg</groupId>
        <artifactId>iceberg-spark3-runtime</artifactId>
        <version>${iceberg.version}</version>
    </dependency>

    <dependency>
        <groupId>org.apache.iceberg</groupId>
        <artifactId>iceberg-spark3-extensions</artifactId>
        <version>${iceberg.version}</version>
    </dependency>

    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.2.47</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.46</version>
    </dependency>
</dependencies>


<build>
    <plugins>
      <plugin>
        <groupId>org.scala-tools</groupId>
        <artifactId>maven-scala-plugin</artifactId>
        <version>2.15.1</version>
        <executions>
            <execution>
                <id>compile-scala</id>
                <goals>
                    <goal>add-source</goal>
                    <goal>compile</goal>
                </goals>
            </execution>
            <execution>
                <id>test-compile-scala</id>
                <goals>
                    <goal>add-source</goal>
                    <goal>testCompile</goal>
               </goals>
           </execution>
        </executions>
    </plugin>
    <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-assembly-plugin</artifactId>
        <configuration>
          <archive>
            <manifest>
            </manifest>
          </archive>
          <descriptorRefs>
             <descriptorRef>jar-with-dependencies</descriptorRef>
          </descriptorRefs>
        </configuration>
     </plugin>
   </plugins>
</build>

4.3读取表

package com.atguigu.iceberg.spark.sql

import org.apache.spark.SparkConf
import org.apache.spark.sql.{DataFrame, SparkSession}

object TableOperations {

  def main(args: Array[String]): Unit = { val sparkConf = new SparkConf()
   .set("spark.sql.catalog.hadoop_prod", "org.apache.iceberg.spark.SparkCatalog")
   .set("spark.sql.catalog.hadoop_prod.type", "hadoop")
   .set("spark.sql.catalog.hadoop_prod.warehouse", "hdfs://mycluster/hive/warehouse")
   .set("spark.sql.catalog.catalog-name.type", "hadoop")
   .set("spark.sql.catalog.catalog-name.default-namespace", "default")
   .set("spark.sql.sources.partitionOverwriteMode", "dynamic")
   .set("spark.sql.session.timeZone", "GMT+8")
   .setMaster("local[*]").setAppName("table_operations")

    val sparkSession = SparkSession.builder().config(sparkConf).getOrCreate() 
    readTale(sparkSession)

}

/**
*读取iceberg 的表
*@param sparkSession
*/
  def readTale(sparkSession: SparkSession) = {
     //三种方式sparkSession.table("hadoop_prod.db.testA").show()
     sparkSession.read.format("iceberg").load("hadoop_prod.db.testA").show() 
     sparkSession.read.format("iceberg").load("/hive/warehouse/db/testA").show()// 路径到表就行，不要到具体文件

  }
}

4.4读取快照

 def readSnapShots(sparkSession: SparkSession) = {
  //根据查询 hadoop_prod.db.testA.snapshots 快照表可以知道快照时间和快照id
  //根据时间戳读取，必须是时间戳 不能使用格式化后的时间
  sparkSession.read
  .option("as-of-timestamp", "1624961454000") //毫秒时间戳，查询比该值时间更早的快照
  .format("iceberg")
  .load("hadoop_prod.db.testA").show()

  //根据快照 id 查询
  sparkSession.read
     .option("snapshot-id", "9054909815461789342")
     .format("iceberg")
     .load("hadoop_prod.db.testA").show()
  }
}

4.5写入表

4.5.1写入数据并创建表

1）编写代码执行

case class Student(id: Int, name: String, age: Int, dt: String)

  def writeAndCreateTable(sparkSession: SparkSession) = { 
    import  sparkSession.implicits._
    import org.apache.spark.sql.functions._
    val data = sparkSession.createDataset[Student](Array(Student(1001, " 张 三 ", 18, "2021-06-28"),
    Student(1002, "李四", 19, "2021-06-29"), Student(1003, "王五", 20, "2021-06-29")))
    data.writeTo("hadoop_prod.db.test1").partitionedBy(col("dt")) //指定dt 为分区列
.create()
  }
}

2）验证，进入 spark sql 窗口，查看表结构和表数据

spark-sql (default)> desc test1;

spark-sql (default)> select *from test1;

spark-sql (default)> desc test1;

Iceberg实战踩坑指南

spark-sql (default)> select *from test1;

Iceberg实战踩坑指南

spark-sql (default)> select *from test1;

Iceberg实战踩坑指南 3）查看 hdfs，是否按 dt 进行分区

Iceberg实战踩坑指南

4.5.1写数据

4.5.1.1 Append

1）编写代码，执行

def AppendTable(sparkSession: SparkSession) = {
  //两种方式
  import sparkSession.implicits._
  val data = sparkSession.createDataset(Array(Student(1003, "王五", 11, "2021-06- 29"), Student(1004, "赵六", 10, "2021-06-30")))
  data.writeTo("hadoop_prod.db.test1").append()// 使 用 DataFrameWriterV2 API 
  data.write.format("iceberg").mode("append").save("hadoop_prod.db.test1")	// 使 用
  DataFrameWriterV1 API

 }
}

2）执行完毕后进行测试，注意：小 bug,执行完代码后，如果 spark sql 黑窗口不重新打开是不会刷新数据的，只有把 spark sql 窗口界面重新打开才会刷新数据。如果使用代码查询能看到最新数据

Iceberg实战踩坑指南

3）关闭，再次进入查询，可以查询到数据

Iceberg实战踩坑指南

4.5.1.2 OverWrite

1）编写代码，测试

/**
*动态覆盖
*@param sparkSession
*/
def OverWriteTable(sparkSession: SparkSession)={ 
   import sparkSession.implicits._
   val data = sparkSession.createDataset(Array(Student(1003, " 王五", 11, "2021-06-29"),
   Student(1004, "赵六", 10, "2021-06-30")))
   data.writeTo("hadoop_prod.db.test1").overwritePartitions() //动态覆盖,只会刷新所属分区数据
}

2）查询

Iceberg实战踩坑指南

3）显示，手动指定覆盖分区

def OverWriteTable2(sparkSession: SparkSession) = { 
   import sparkSession.implicits._
   val data = sparkSession.createDataset(Array(Student(1, "s1", 1, "111"), Student(2, "s2", 2, "111")))
   data.writeTo("hadoop_prod.db.test1").overwrite($"dt" === "2021-06-30")
}

4）查询,2021-06-30 分区的数据已经被覆盖走

Iceberg实战踩坑指南

4.6模拟数仓

4.6.1表模型

（1）表模型，底下 6 张基础表，合成一张宽表，再基于宽表统计指标

Iceberg实战踩坑指南

4.6.2建表语句

（1）建表语句

create table hadoop_prod.db.dwd_member(
   uid int,
   ad_id int,
   birthday string,
   email string,
   fullname string,
   iconurl string,
   lastlogin string,
   mailaddr string,
   memberlevel string,
   password string,
   paymoney string,
   phone string,
   qq string,
   register string,
   regupdatetime string,
   unitname string,
   userip string,
   zipcode string,
   dt string)
  using iceberg
   partitioned by(dt);
    
   
create table hadoop_prod.db.dwd_member_regtype(
  uid int,
  appkey string,
  appregurl string,
  bdp_uuid string,
  createtime timestamp,
  isranreg string,
  regsource string,
  regsourcename string,
  websiteid int,
  dt string)
  using iceberg
  partitioned by(dt);
    
 
create table hadoop_prod.db.dwd_base_ad(
adid int,
adname string,
dn string)
using iceberg
partitioned by (dn) ;
    
 
 create table hadoop_prod.db.dwd_base_website(
  siteid int,
  sitename string,
  siteurl string,
 `delete` int,
  createtime timestamp,
  creator string,
  dn string)
using iceberg
partitioned by (dn) ;
    
create table hadoop_prod.db.dwd_pcentermempaymoney(
  uid int,
  paymoney string,
  siteid int,
  vip_id int,
  dt string,
  dn string)
using iceberg   
 partitioned by(dt,dn);
    
 create table hadoop_prod.db.dwd_vip_level(
   vip_id int,
   vip_level string,
   start_time timestamp,
   end_time timestamp,
   last_modify_time timestamp,
   max_free string,
   min_free string,
   next_level string,
   operator string,
   dn string)
 using iceberg
 partitioned by(dn);
  
  
 create table hadoop_prod.db.dws_member(
  uid int,
  ad_id int,
  fullname string,
  iconurl string,
  lastlogin string,
  mailaddr string,
  memberlevel string,
  password string,
  paymoney string,
  phone string,
  qq string,
  register string,
  regupdatetime string,
  unitname string,
  userip string,
  zipcode string,
  appkey string,
  appregurl string,
  bdp_uuid string,
  reg_createtime timestamp,
  isranreg string,
  regsource string,
  regsourcename string,
  adname string,
  siteid int,
  sitename string,
  siteurl string,
  site_delete string,
  site_createtime string,
  site_creator string,
  vip_id int,
  vip_level string,
  vip_start_time timestamp,
  vip_end_time timestamp,
  vip_last_modify_time timestamp,
  vip_max_free string,
  vip_min_free string,
  vip_next_level string,
  vip_operator string,
 dt string,
dn string)
using iceberg
partitioned by(dt,dn);
    
 
 create  table hadoop_prod.db.ads_register_appregurlnum(
  appregurl string,
  num int,
  dt string,
  dn string)
using iceberg
partitioned by(dt);
  
 create table hadoop_prod.db.ads_register_top3memberpay(
  uid int,
  memberlevel string,
  register string,
  appregurl string,
  regsourcename string,
  adname string,
  sitename string,
  vip_level string,
  paymoney decimal(10,4),
  rownum int,
 dt string,
dn string)
using iceberg
partitioned by(dt);

4.6.3测试数据

（1）测试数据上传到 hadoop，作为第一层 ods

[root@hadoop103 software]# hadoop dfs -mkdir /ods
[root@hadoop103 software]# hadoop dfs -put *.log /ods

Iceberg实战踩坑指南

4.6.4 编写代码

4.6.4.1 dwd 层

1）创建目录，划分层级 Iceberg实战踩坑指南

2）编写所需实体类

package com.atguigu.iceberg.warehouse.bean 
import java.sql.Timestamp

case class BaseWebsite(
  siteid:  Int, sitename: String, siteurl: String, delete: Int, createtime: 
  Timestamp, creator: String,
  dn: String
)

case class MemberRegType(
  uid: Int, appkey: String,
  appregurl: String,
  bdp_uuid: String, createtime: Timestamp,
  isranreg: String, regsource: String, regsourcename: String, websiteid: Int,
  dt: String
)

case class VipLevel(
  vip_id: Int, vip_level: String, start_time: Timestamp, end_time: Timestamp,
  last_modify_time: Timestamp, max_free: String,
  min_free: String, next_level: String, operator: String, dn: String
)

3）编写 DwdIcebergService

package com.atguigu.iceberg.warehouse.service


import java.sql.Timestamp import java.time.LocalDate
import java.time.format.DateTimeFormatter
import com.atguigu.iceberg.warehouse.bean.{BaseWebsite, MemberRegType, VipLevel} import org.apache.spark.sql.SparkSession



object DwdIcebergService {


  def readOdsData(sparkSession: SparkSession) = { 

    import  org.apache.spark.sql.functions._ 
    import sparkSession.implicits._ 
    sparkSession.read.json("/ods/baseadlog.log")
    .withColumn("adid", col("adid").cast("Int"))
    .writeTo("hadoop_prod.db.dwd_base_ad").overwritePartitions()


    sparkSession.read.json("/ods/baswewebsite.log").map(item => { val createtime = item.getAs[String]("createtime")

    val str = LocalDate.parse(createtime, DateTimeFormatter.ofPattern("yyyy-MM-dd")).atStartOfDay().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")) 

    BaseWebsite(item.getAs[String]("siteid").toInt, item.getAs[String]("sitename"),

    item.getAs[String]("siteurl"), item.getAs[String]("delete").toInt, 
    Timestamp.valueOf(str), item.getAs[String]("creator"), item.getAs[String]("dn"))

  }).writeTo("hadoop_prod.db.dwd_base_website").overwritePartitions()



sparkSession.read.json("/ods/member.log").drop("dn")
.withColumn("uid", col("uid").cast("int"))
.withColumn("ad_id", col("ad_id").cast("int"))
.writeTo("hadoop_prod.db.dwd_member").overwritePartitions()



sparkSession.read.json("/ods/memberRegtype.log").drop("domain").drop("dn")
.withColumn("regsourcename", col("regsource"))
.map(item => {

val createtime = item.getAs[String]("createtime")
val str = LocalDate.parse(createtime, DateTimeFormatter.ofPattern("yyyy-MM-dd")).atStartOfDay().
format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")) MemberRegType(item.getAs[String]("uid").toInt, item.getAs[String]("appkey"),



item.getAs[String]("appregurl"), item.getAs[String]("bdp_uuid"), Timestamp.valueOf(str), item.getAs[String]("isranreg"), item.getAs[String]("regsource"), item.getAs[String]("regsourcename"), item.getAs[String]("websiteid").toInt, item.getAs[String]("dt"))

}).writeTo("hadoop_prod.db.dwd_member_regtype").overwritePartitions()



sparkSession.read.json("/ods/pcenterMemViplevel.log").drop("discountval")

.map(item => {

  val startTime = item.getAs[String]("start_time") val endTime = item.getAs[String]("end_time")

  val last_modify_time = item.getAs[String]("last_modify_time")

  val startTimeStr = LocalDate.parse(startTime, DateTimeFormatter.ofPattern("yyyy-MM- 
 dd")).atStartOfDay().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"))

  val endTimeStr = LocalDate.parse(endTime, DateTimeFormatter.ofPattern("yyyy-MM-dd")).atStartOfDay().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"))

  val last_modify_timeStr = LocalDate.parse(last_modify_time, 
  DateTimeFormatter.ofPattern("yyyy-MM-dd")).atStartOfDay().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")) 
  VipLevel(item.getAs[String]("vip_id").toInt, item.getAs[String]("vip_level"),

  Timestamp.valueOf(startTimeStr), Timestamp.valueOf(endTimeStr), 
  Timestamp.valueOf(last_modify_timeStr),

  item.getAs[String]("max_free"), item.getAs[String]("min_free"), 
  item.getAs[String]("next_level"), item.getAs[String]("operator"), 
  item.getAs[String]("dn"))

}).writeTo("hadoop_prod.db.dwd_vip_level").overwritePartitions()



  sparkSession.read.json("/ods/pcentermempaymoney.log")

   .withColumn("uid", col("uid").cast("int"))
   .withColumn("siteid", col("siteid").cast("int"))
   .withColumn("vip_id", col("vip_id").cast("int"))
   .writeTo("hadoop_prod.db.dwd_pcentermempaymoney").overwritePartitions()

 }

}

4).编写 DwdIcebergController

package com.atguigu.iceberg.warehouse.controller

import com.atguigu.iceberg.warehouse.service.DwdIcebergService import org.apache.spark.SparkConf
import org.apache.spark.sql.SparkSession

object DwdIcebergController {

  def main(args: Array[String]): Unit = { 
     val sparkConf = new SparkConf()
    .set("spark.sql.catalog.hadoop_prod", "org.apache.iceberg.spark.SparkCatalog")
    .set("spark.sql.catalog.hadoop_prod.type", "hadoop")
    .set("spark.sql.catalog.hadoop_prod.warehouse",
"hdfs://mycluster/hive/warehouse")
    .set("spark.sql.catalog.catalog-name.type", "hadoop")
    .set("spark.sql.catalog.catalog-name.default-namespace", "default")
    .set("spark.sql.sources.partitionOverwriteMode", "dynamic")
    .set("spark.sql.session.timeZone", "GMT+8")
    .setMaster("local[*]").setAppName("table_operations")
    val sparkSession = SparkSession.builder().config(sparkConf).getOrCreate() 
     DwdIcebergService.readOdsData(sparkSession)
  }

}

4.6.4.2 dws 层（表指定多个分区列会有 bug）

1）创建 case class

case class DwsMember(

  uid: Int, ad_id: Int,
  fullname: String, iconurl: String, lastlogin: String, mailaddr: String, 
  memberlevel: String, password: String, paymoney: String, phone: String,
  qq: String, register: String,
  regupdatetime: String, unitname: String, userip: String, zipcode: String, appkey: 
  String, appregurl: String, bdp_uuid: String, reg_createtime: String, isranreg: 
  String, regsource: String, regsourcename: String, adname:  String, siteid: 
  String, sitename: String, siteurl: String, site_delete: String,
  site_createtime: String, site_creator: String, vip_id: String, vip_level: String, 
  vip_start_time: String, vip_end_time: String,
  vip_last_modify_time: String, vip_max_free: String, vip_min_free: String, 
  vip_next_level: String, vip_operator: String,
  dt: String, dn: String

)


case class DwsMember_Result(

  uid: Int, ad_id: Int,
  fullname: String, iconurl: String, lastlogin: String, mailaddr: String, 
  memberlevel: String,
  password: String,
  paymoney: String, phone: String, qq: String, register: String,
  regupdatetime: String, unitname: String, userip: String, zipcode: String, appkey: 
  String, appregurl: String, bdp_uuid: String,
  reg_createtime: Timestamp, isranreg: String, regsource: String, regsourcename: 
  String, adname: String,
  siteid: Int, sitename: String, siteurl: String, site_delete: String,
  site_createtime: String, site_creator: String, vip_id: Int,
  vip_level: String, vip_start_time: Timestamp, vip_end_time: Timestamp, 
  vip_last_modify_time: Timestamp, vip_max_free: String, vip_min_free: String, 
  vip_next_level: String, vip_operator: String,
  dt: String, dn: String
)

2）创建 DwdIcebergDao 操作六张基础表

package com.atguigu.iceberg.warehouse.dao 

import org.apache.spark.sql.SparkSession

 
object DwDIcebergDao {
    def getDwdMember(sparkSession: SparkSession) = {
       sparkSession.sql("selectuid,ad_id 
      ,birthday,email,fullname,iconurl,lastlogin,mailaddr,memberlevel," + 
      "password,phone,qq,register,regupdatetime,unitname,userip,zipcode,dt
      from hadoop_prod.db.dwd_member")
    }

}


def getDwdPcentermempaymoney(sparkSession: SparkSession) = {

      sparkSession.sql("select	uid,paymoney,siteid,vip_id,dt,dn
      hadoop_prod.db.dwd_pcentermempaymoney")
}

def getDwdVipLevel(sparkSession: SparkSession) = {

      sparkSession.sql("select vip_id,vip_level,start_time as 
      vip_start_time,end_time as vip_end_time," +
      "last_modify_time as vip_last_modify_time,max_free as vip_max_free,min_free 
      as vip_min_free,next_level as vip_next_level," +
      "operator as vip_operator,dn from hadoop_prod.db.dwd_vip_level")
}

def getDwdBaseWebsite(sparkSession: SparkSession) = {

   sparkSession.sql("select siteid,sitename,siteurl,delete as 
   site_delete,createtime as site_createtime,creator as site_creator" +
   ",dn from hadoop_prod.db.dwd_base_website")

}

def getDwdMemberRegtyp(sparkSession: SparkSession) = {
   sparkSession.sql("select	uid,appkey,appregurl,bdp_uuid,createtime	as 
   reg_createtime,isranreg,regsource,regsourcename,websiteid," +
   "dt from hadoop_prod.db.dwd_member_regtype")
}

def getDwdBaseAd(sparkSession: SparkSession) = {
   sparkSession.sql("select adid as ad_id,adname,dn from 
   hadoop_prod.db.dwd_base_ad;")
}

3）编写 DwsIcebergService，处理业务

package com.atguigu.iceberg.warehouse.service

import java.sql.Timestamp import java.time.LocalDateTime
import java.time.format.DateTimeFormatter

import com.atguigu.iceberg.warehouse.bean.{DwsMember, DwsMember_Result} import com.atguigu.iceberg.warehouse.dao.DwDIcebergDao
import org.apache.spark.sql.SparkSession

object DwsIcebergService {


   def getDwsMemberData(sparkSession: SparkSession, dt: String) = { 

     import sparkSession.implicits._
     val	dwdPcentermempaymoney	= 
     DwDIcebergDao.getDwdPcentermempaymoney(sparkSession).where($"dt" === dt)
     val dwdVipLevel = DwDIcebergDao.getDwdVipLevel(sparkSession)
     val dwdMember = DwDIcebergDao.getDwdMember(sparkSession).where($"dt" === dt) 
     val dwdBaseWebsite = DwDIcebergDao.getDwdBaseWebsite(sparkSession)
     val dwdMemberRegtype = 
     DwDIcebergDao.getDwdMemberRegtyp(sparkSession).where($"dt" ===dt)


     val dwdBaseAd = DwDIcebergDao.getDwdBaseAd(sparkSession)
     val result = dwdMember.join(dwdMemberRegtype.drop("dt"), Seq("uid"), "left")
     .join(dwdPcentermempaymoney.drop("dt"), Seq("uid"), "left")
     .join(dwdBaseAd, Seq("ad_id", "dn"), "left")
     .join(dwdBaseWebsite, Seq("siteid", "dn"), "left")
     .join(dwdVipLevel, Seq("vip_id", "dn"), "left_outer")
      .select("uid", "ad_id", "fullname", "iconurl", "lastlogin", "mailaddr", 
     "memberlevel","password", "paymoney", "phone", "qq", 
     "register","regupdatetime", "unitname", "userip", "zipcode", "appkey",	 
     "appregurl",	"bdp_uuid",	"reg_createtime",	"isranreg",	"regsource", 
     "regsourcename", "adname", "siteid", "sitename", "siteurl", "site_delete", 
     "site_createtime", "site_creator", "vip_id", "vip_level",
     "vip_start_time",	"vip_end_time",	"vip_last_modify_time",	"vip_max_free", 
     "vip_min_free", "vip_next_level", "vip_operator", "dt", "dn").as[DwsMember]

     val resultData = result.groupByKey(item => item.uid + "_" + item.dn)
     .mapGroups { 
        case (key, iters) => val keys = key.split("_")
        val uid = Integer.parseInt(keys(0)) val dn = keys(1)
        val dwsMembers = iters.toList
        val	paymoney	=	 
dwsMembers.filter(_.paymoney!=null).map(item=>BigDecimal.apply(item.paymoney)).reduceOption(_		+
_).getOrElse(BigDecimal.apply(0.00)).toString		
        val ad_id = dwsMembers.map(_.ad_id).head		
        val fullname = dwsMembers.map(_.fullname).head		
        val icounurl = dwsMembers.map(_.iconurl).head		
        val lastlogin = dwsMembers.map(_.lastlogin).head		
        val mailaddr = dwsMembers.map(_.mailaddr).head		
        val memberlevel = dwsMembers.map(_.memberlevel).head		
        val password = dwsMembers.map(_.password).head		
        val phone = dwsMembers.map(_.phone).head		
        val qq = dwsMembers.map(_.qq).head		
        val register = dwsMembers.map(_.register).head		
        val regupdatetime = dwsMembers.map(_.regupdatetime).head		
        val unitname = dwsMembers.map(_.unitname).head		
        val userip = dwsMembers.map(_.userip).head		
        val zipcode = dwsMembers.map(_.zipcode).head		
        val appkey = dwsMembers.map(_.appkey).head		
        val appregurl = dwsMembers.map(_.appregurl).head		
        val bdp_uuid = dwsMembers.map(_.bdp_uuid).head		
        val	reg_createtime	=	if	(dwsMembers.map(_.reg_createtime).head	!=	null)
        dwsMembers.map(_.reg_createtime).head else "1970-01-01 00:00:00" val isranreg = 
        dwsMembers.map(_.isranreg).head
        val regsource = dwsMembers.map(_.regsource).head
        val regsourcename = dwsMembers.map(_.regsourcename).head val adname = 
        dwsMembers.map(_.adname).head
        val	siteid	=	if	(dwsMembers.map(_.siteid).head	!=	null) 
        dwsMembers.map(_.siteid).head else "0"
        val sitename = dwsMembers.map(_.sitename).head val siteurl = 
        dwsMembers.map(_.siteurl).head
        val site_delete = dwsMembers.map(_.site_delete).head
        val site_createtime = dwsMembers.map(_.site_createtime).head val site_creator = 
        dwsMembers.map(_.site_creator).head
        val	vip_id	=	if	(dwsMembers.map(_.vip_id).head	!=	null) 
        dwsMembers.map(_.vip_id).head else "0"
        val vip_level = dwsMembers.map(_.vip_level).max
        val	vip_start_time	=	if	(dwsMembers.map(_.vip_start_time).min	!=	null) 
        dwsMembers.map(_.vip_start_time).min else "1970-01-01 00:00:00"
        val	vip_end_time	=	if	(dwsMembers.map(_.vip_end_time).max	!=	null) 
        dwsMembers.map(_.vip_end_time).max else "1970-01-01 00:00:00"
        val vip_last_modify_time = if (dwsMembers.map(_.vip_last_modify_time).max != null)
        dwsMembers.map(_.vip_last_modify_time).max else "1970-01-01 00:00:00"
        val vip_max_free =  dwsMembers.map(_.vip_max_free).head val vip_min_free =  
        dwsMembers.map(_.vip_min_free).head val vip_next_level = 
        dwsMembers.map(_.vip_next_level).head val vip_operator = 
        dwsMembers.map(_.vip_operator).head
        val formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")
        val reg_createtimeStr = LocalDateTime.parse(reg_createtime, formatter); val 
        vip_start_timeStr = LocalDateTime.parse(vip_start_time, formatter) val 
        vip_end_timeStr = LocalDateTime.parse(vip_end_time, formatter)
        val vip_last_modify_timeStr = LocalDateTime.parse(vip_last_modify_time, formatter) 
        DwsMember_Result(uid, ad_id, fullname, icounurl, lastlogin, mailaddr, 
        memberlevel,password, paymoney,phone, qq, register, regupdatetime, 
        unitname,userip, zipcode, appkey, 
        appregurl,bdp_uuid,Timestamp.valueOf(reg_createtimeStr),	isranreg,	 
        regsource,regsourcename, adname, siteid.toInt,
        sitename, siteurl, site_delete, site_createtime, site_creator, vip_id.toInt, 
        vip_level,Timestamp.valueOf(vip_start_timeStr),	
        Timestamp.valueOf(vip_end_timeStr), 
        Timestamp.valueOf(vip_last_modify_timeStr), vip_max_free, vip_min_free,
                      vip_next_level, vip_operator, dt, dn)

     }
 
   resultData.write.format("iceberg").mode("overwrite").
    save("hadoop_prod.db.dws_member")

   }


}

4）编写 DwsIcebergController,进行运行测试

package com.atguigu.iceberg.warehouse.controller

import com.atguigu.iceberg.warehouse.service.DwsIcebergService 
import org.apache.spark.SparkConf
import org.apache.spark.sql.SparkSession

object DwsIcebergController {

   def main(args: Array[String]): Unit = { 
     val sparkConf = new SparkConf()
    .set("spark.sql.catalog.hadoop_prod", "org.apache.iceberg.spark.SparkCatalog")
    .set("spark.sql.catalog.hadoop_prod.type", "hadoop")
    .set("spark.sql.catalog.hadoop_prod.warehouse", 
      "hdfs://mycluster/hive/warehouse")
    .set("spark.sql.catalog.catalog-name.type", "hadoop")
    .set("spark.sql.catalog.catalog-name.default-namespace", "default")
    .set("spark.sql.sources.partitionOverwriteMode", "dynamic")
    .set("spark.sql.session.timeZone", "GMT+8")
    .setMaster("local[*]").setAppName("table_operations")

    val sparkSession = SparkSession.builder().config(sparkConf).getOrCreate() 
    DwsIcebergService.getDwsMemberData(sparkSession, "20190722")
   }
}

5）发生报错，和上面在 spark sql 黑窗口测试的错误一致，当有批量数据插入分区时提示分区已关闭无法插入

Iceberg实战踩坑指南

6）重新建表，分区列去掉 dn,只用 dt，bug：不能指定多个分区，只能指定一个分区列

spark-sql (default)> drop table hadoop_prod.db.dws_member; create table hadoop_prod.db.dws_member(
  uid int, ad_id int,
  fullname string, iconurl string, lastlogin string, mailaddr string, memberlevel 
  string, password string, paymoney string, phone string,
  register string, regupdatetime string, unitname string, userip string, zipcode 
  string, appkey string, appregurl string, bdp_uuid string,
  reg_createtime timestamp, isranreg string, regsource string, regsourcename 
  string, adname string,
  siteid int, sitename string, siteurl string, site_delete string,
  site_createtime string, site_creator string, vip_id int,
  vip_level string, vip_start_time timestamp, vip_end_time timestamp, 
  vip_last_modify_time timestamp, vip_max_free string, vip_min_free string, 
  vip_next_level string, vip_operator string,
dt string, dn string)
using iceberg
partitioned by(dt);

7）建完表后，重新测试，插入数据成功

Iceberg实战踩坑指南

4.6.4.3 ads 层

1)编写所需 case class

case class QueryResult(
  uid: Int, ad_id: Int,
  memberlevel: String, register: String,
  appregurl: String, //注册来源url
  regsource: String, regsourcename: String,
  adname: String, siteid: String, sitename: String, vip_level: String, paymoney: 
  BigDecimal, dt: String,
  dn: String
)

2)编写 DwsIcebergDao，查询宽表

package com.atguigu.iceberg.warehouse.dao 

import org.apache.spark.sql.SparkSession

object DwsIcebergDao {
   /**
    *查询用户宽表数据
    *
    *@param sparkSession
    *@return
    */
  def queryDwsMemberData(sparkSession: SparkSession) = { 
         sparkSession.sql("select
          uid,ad_id,memberlevel,register,appregurl,regsource,regsourcename,adname," 
          + "siteid,sitename,vip_level,cast(paymoney as decimal(10,4)) as 
          paymoney,dt,dn from hadoop_prod.db.dws_member ")
  }
}

3)编写 AdsIcebergService,统计指标

package com.atguigu.iceberg.warehouse.service

import com.atguigu.iceberg.warehouse.bean.QueryResult 
import com.atguigu.iceberg.warehouse.dao.DwsIcebergDao 
import org.apache.spark.sql.expressions.Window
import org.apache.spark.sql.{SaveMode, SparkSession}

object AdsIcebergService {

   def queryDetails(sparkSession: SparkSession, dt: String) = { 
    import   sparkSession.implicits._
     val	result	= 
DwsIcebergDao.queryDwsMemberData(sparkSession).as[QueryResult].where(s"dt='${dt}'")
result.cache()

   //统计根据 url 统计人数 wordcount result.mapPartitions(partition => {
    partition.map(item => (item.appregurl + "_" + item.dn + "_" + item.dt, 1))
}).groupByKey(_._1).mapValues(item => item._2).reduceGroups(_ + _).map(item => {
    val keys = item._1.split("_") val appregurl = keys(0)
    val dn = keys(1) val dt = keys(2)
    (appregurl, item._2, dt, dn)
 }).toDF("appregurl",	"num",	"dt", "dn").writeTo("hadoop_prod.db.ads_register_appregurlnum").overwritePartitions()

    //统计各 memberlevel 等级 支付金额前三的用户
   import org.apache.spark.sql.functions._ 

  result.withColumn("rownum",row_number().over(Window.partitionBy("memberlevel").
         orderBy(desc("paymoney"))))
        .where("rownum<4").orderBy("memberlevel", "rownum")
        .select("uid", "memberlevel", "register", "appregurl", "regsourcename", 
        "adname", "sitename", "vip_level", "paymoney", "rownum", "dt", "dn")
     .writeTo("hadoop_prod.db.ads_register_top3memberpay").overwritePartitions()
   }
}

4)编写 AdsIcebergController,进行本地测试

package com.atguigu.iceberg.warehouse.controller

import com.atguigu.iceberg.warehouse.service.AdsIcebergService 
import org.apache.spark.SparkConf
import org.apache.spark.sql.SparkSession

object AdsIcebergController {
   def main(args: Array[String]): Unit = { 
      val sparkConf = new SparkConf()
     .set("spark.sql.catalog.hadoop_prod", "org.apache.iceberg.spark.SparkCatalog")
     .set("spark.sql.catalog.hadoop_prod.type", "hadoop")
     .set("spark.sql.catalog.hadoop_prod.warehouse", "hdfs://mycluster/hive/warehouse")
     .set("spark.sql.catalog.catalog-name.type", "hadoop")
     .set("spark.sql.catalog.catalog-name.default-namespace", "default")
     .set("spark.sql.sources.partitionOverwriteMode", "dynamic")
     .set("spark.sql.session.timeZone", "GMT+8")
     .setMaster("local[*]").setAppName("dwd_app")
     val sparkSession = SparkSession.builder().config(sparkConf).getOrCreate() 
     AdsIcebergService.queryDetails(sparkSession, "20190722")
    }
}

5)查询，验证结果

Iceberg实战踩坑指南

4.6.5 yarn 测试

1)local 模式测试完毕后，将代码打成 jar 包，提交到集群上进行测试，那么插入模式当前都是为 overwrite 模式，所以在 yarn 上测试的时候也无需删除历史数据

2)打 jar 包之前，注意将代码中 setMast(local[*]) 注释了，把集群上有的依赖也可用<scope>provided</scope>剔除了打一个瘦包

Iceberg实战踩坑指南

3)打成 jar 包提交到集群，运行 spark-submit 命令运行 yarn 模式。

spark-submit --master yarn --deploy-mode client --driver-memory 1g --num-executors 3
--executor-cores	4	--executor-memory	2g	--queue	spark	--class com.atguigu.iceberg.warehouse.controller.DwdIcebergContorller
iceberg-spark-demo-1.0-SNAPSHOT-jar-with-dependencies.jar

spark-submit --master yarn --deploy-mode client --driver-memory 1g --num-executors 3
--executor-cores	4	--executor-memory	2g	--queue	spark	--class com.atguigu.iceberg.warehouse.controller.DwsIcebergController
iceberg-spark-demo-1.0-SNAPSHOT-jar-with-dependencies.jar

spark-submit --master yarn --deploy-mode client --driver-memory 1g --num-executors 3
--executor-cores	4	--executor-memory	2g	--queue	spark	--class com.atguigu.iceberg.warehouse.controller.AdsIcebergController
iceberg-spark-demo-1.0-SNAPSHOT-jar-with-dependencies.jar

第 5 章 Structured Streaming 操作

5.1 基于 Structured Streaming 落明细数据

5.1.1创建测试 topic

[root@hadoop103 kafka_2.11-2.4.0]# bin/kafka-topics.sh --zookeeper
hadoop102:2181/kafka_2.4 --create --replication-factor 2 --partitions 12 --topic test1

1)启动 kafka,创建测试用的 topic

2)导入依赖

编写 producer 往 topic 里发送测试数据

package com.atguigu.iceberg.spark.structuredstreaming;

import org.apache.kafka.clients.producer.KafkaProducer; import org.apache.kafka.clients.producer.ProducerRecord;

import java.util.Properties; import java.util.Random;

public class TestProducer {

   public static void main(String[] args) { 
      Properties props = new Properties();
      props.put("bootstrap.servers", "hadoop101:9092,hadoop102:9092,hadoop103:9092"); 
      props.put("acks", "-1");
      props.put("batch.size", "1048576");
      props.put("linger.ms", "5"); props.put("compression.type", "snappy"); 
      props.put("buffer.memory", "33554432"); props.put("key.serializer",
   "org.apache.kafka.common.serialization.StringSerializer"); 
      props.put("value.serializer",
   "org.apache.kafka.common.serialization.StringSerializer"); KafkaProducer<String, 
     String> producer = new KafkaProducer<String, String>(props); Random random = new 
      Random();
      for (int i = 0; i < 10000000; i++) { 
         producer.send(new ProducerRecord<String,String> 
         ("test1",i+"\t"+random.nextInt(100)+"\t"+random.nextInt(3)
          +"\t"+System.currentTimeMillis()));
      }
   producer.flush(); producer.close();
  }
}

3)创建测试表

create table hadoop_prod.db.test_topic( uid bigint,
courseid int, deviceid int, ts timestamp)
using iceberg partitioned by(days(ts));

5.3 编写代码

基于 test1 的测试数据，编写结构化流代码，进行测试

package com.atguigu.iceberg.spark.structuredstreaming

import java.sql.Timestamp

import org.apache.spark.SparkConf
import org.apache.spark.sql.{Dataset, SparkSession}

object TestTopicOperators {
   def main(args: Array[String]): Unit = { 
     val sparkConf = new SparkConf()
    .set("spark.sql.catalog.hadoop_prod", "org.apache.iceberg.spark.SparkCatalog")
    .set("spark.sql.catalog.hadoop_prod.type", "hadoop")
    .set("spark.sql.catalog.hadoop_prod.warehouse", 
    "hdfs://mycluster/hive/warehouse")
    .set("spark.sql.catalog.catalog-name.type", "hadoop")
    .set("spark.sql.catalog.catalog-name.default-namespace", "default")
    .set("spark.sql.sources.partitionOverwriteMode", "dynamic")
    .set("spark.sql.session.timeZone", "GMT+8")
    .set("spark.sql.shuffle.partitions", "12")
   //.setMaster("local[*]")
   .setAppName("test_topic")
    val sparkSession = SparkSession.builder().config(sparkConf).getOrCreate() val 
    df = sparkSession.readStream.format("kafka")
    .option("kafka.bootstrap.servers", 
    "hadoop101:9092,hadoop102:9092,hadoop103:9092")
    .option("subscribe", "test1")
    .option("startingOffsets", "earliest")
    .option("maxOffsetsPerTrigger", "10000").load()


import sparkSession.implicits._


   val query = df.selectExpr("cast (value as string)").as[String]
    .map(item => {
      val array = item.split("\t") val uid = array(0)
      val courseid = array(1) val deviceid = array(2) val ts = array(3)
      Test1(uid.toLong, courseid.toInt, deviceid.toInt, new Timestamp(ts.toLong))
     }).writeStream.foreachBatch { (batchDF: Dataset[Test1], batchid: Long) => 
          batchDF.writeTo("hadoop_prod.db.test_topic").overwritePartitions()
     }.option("checkpointLocation", "/ss/checkpoint")
      .start() query.awaitTermination()
    }

case class Test1(uid: BigInt,
courseid: Int, deviceid: Int, ts: Timestamp)

5.4 提交 yarn 测试速度

1）打成 jar 包，上传到集群，运行代码跑 yarn 模式让 vcore 个数和 shuffle 分区数保持1:1 最高效运行

[root@hadoop103	lizunting]#	spark-submit	--master	yarn	--deploy-mode	client
--driver-memory 1g  --num-executors 3 --executor-cores 4	--executor-memory 2g --queue spark	--class	com.atguigu.iceberg.spark.structuredstreaming.TestTopicOperators
iceberg-spark-demo-1.0-SNAPSHOT-jar-with-dependencies.jar

2）运行起来后，查看 Spark Web UI 界面监控速度。趋于稳定后，可以看到速度能到每秒10200,条左右，已经达到了我参数所设置的上限。当然分区数（kafka 分区和 shuffle 分区）和 vcore 越多实时性也会越高目前测试是 12 分区。

Iceberg实战踩坑指南

3）实时性没问题，但是有一个缺点，没有像 hudi 一样解决小文件问题。解决过多文件数可以更改 trigger 触发时间，但也会影响实时效率，两者中和考虑使用。

Iceberg实战踩坑指南

4）最后是花了 18 分钟跑完 1000 万条数据，查询表数据观察是否有数据丢失。数据没有丢失。

第 6 章存在的问题和缺点

6.1问题

时区无法设置
Spark Sql 黑窗口，缓存无法更新，修改表数据后，得需要关了黑窗口再重新打开,查询才是更新后的数据
表分区如果指定多个分区或分桶，那么插入批量数据时，如果这一批数据有多条数据在同一个分区会报错

6.2缺点

与 hudi 相比，没有解决小文件问题
与 hudi 相比，缺少行级更新，只能对表的数据按分区进行 overwrite 全量覆盖

第 7 章 Flink 操作

7.1配置参数和 jar 包

/opt/module/iceberg-apache-iceberg-0.11.1/flink-runtime/build/libs/
[root@hadoop103 libs]# cp *.jar /opt/module/flink-1.11.0/lib/

root@hadoop103 flink-1.11.0]# vim bin/config.sh 
export HADOOP_COMMON_HOME=/opt/module/hadoop-3.1.3 
export HADOOP_HDFS_HOME=/opt/module/hadoop-3.1.3 
export HADOOP_YARN_HOME=/opt/module/hadoop-3.1.3 
export HADOOP_MAPRED_HOME=/opt/module/hadoop-3.1.3 
export HADOOP_CLASSPATH=`hadoop classpath`
export PATH=$PATH:$HADOOP_CLASSPATH

1）Flink1.11 开始就不在提供 flink-shaded-hadoop-2-uber 的支持，所以如果需要 flink 支hadoop 得配置环境变量 HADOOP_CLASSPATH

2）目前 Iceberg 只支持 flink1.11.x 的版本，所以我这使用 flink1.11.0,将构建好的 Iceberg的 jar 包复制到 flink 下

7.2 Flink SQL Client

[root@hadoop103 ~]# cd /opt/module/flink-1.11.0/
[root@hadoop103 flink-1.11.0]# bin/start-cluster.sh

1）在 hadoop 环境下，启动一个单独的 flink 集群

2）启动 flin sql client

[root@hadoop103 flink-1.11.0]# bin/sql-client.sh embedded shell

7.3 使用 Catalogs 创建目录

1） flink 可以通过 sql client 来创建 catalogs 目录，支持的方式有 hive catalog,hadoop catalog,custom catlog。我这里采用 hadoop catlog。

CREATE CATALOG hadoop_catalog WITH ( 
'type'='iceberg',
'catalog-type'='hadoop', 'warehouse'='hdfs://mycluster/flink/warehouse/', 'property-version'='1'
);

2）使用当前 catalog

3）创建 sql-client-defaults.yaml，方便以后启动 flink-sql 客户端，走 iceberg 目录

Flink SQL> exit;
[root@hadoop103 flink-1.11.0]# cd conf/ [root@hadoop103 conf]# vim sql-client-defaults.yaml catalogs:
- name: hadoop_catalog
type: iceberg catalog-type: hadoop
warehouse: hdfs://mycluster/flink/warehouse/

7.4 Flink SQL 操作

7.4.1建库

[root@hadoop103 flink-1.11.0]# bin/sql-client.sh embedded shell

1）再次启动 Flink SQL客户端

2）可以使用默认数据库，也可以创建数据库

Flink SQL> CREATE DATABASE iceberg_db;
Flink SQL> show databases;

3）使用 iceberg 数据库

7.4.2建表（flink 不支持隐藏分区）

建表，我这里直接创建分区表了，使用 flink 对接 iceberg 不能使用 iceberg 的隐藏分区这一特性，目前还不支持。

Iceberg实战踩坑指南

7.4.3 like 建表

可以使用create table 表名 like 的 sql 语句创建表结构完全一样的表

Iceberg实战踩坑指南

7.4.4 insert into

Flink SQL> insert into iceberg.testA values(1001,' 张三',18,'2021-07-01'),(1001,' 李四
',19,'2021-07-02');

7.4.5查询

7.4.6任务监控

1）可查看 hadoop103 默认端口 8081 查看 standlone 模式任务是否成功

Iceberg实战踩坑指南 2）插入数据后，同样 hdfs 路径上也是有对应目录和数据块

7.4.7 insert overwrite

1）使用 overwrite 插入

Flink SQL> insert overwrite iceberg.testA values(1,' 王 五 ',18,'2021-07-01'),(2,' 马 六
',19,'2021-07-02');

2）flink 默认使用流的方式插入数据，这个时候流的插入是不支持 overwrite 操作的

3）需要将插入模式进行修改，改成批的插入方式,再次使用 overwrite 插入数据。如需要改回流式操作参数设置为 SET execution.type = streaming ;

Iceberg实战踩坑指南

4）查询结果，已经将结果根据分区进行覆盖操作

Iceberg实战踩坑指南

第 8 章 Flink API 操作

8.1配置 pom.xml

（1）配置相关依赖

<?xml version="1.0" encoding="UTF-8"?>
<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">
<parent>
  <artifactId>iceberg-demo</artifactId>
  <groupId>com.atguigu.iceberg</groupId>
  <version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>

<artifactId>icberg-flink-demo</artifactId>
<properties>
   <flink.version>1.11.0</flink.version>
   <scala.version>2.12.10</scala.version>
   <scala.binary.version>2.12</scala.binary.version>
   <log4j.version>1.2.17</log4j.version>
   <slf4j.version>1.7.22</slf4j.version>
   <iceberg.version>0.11.1</iceberg.version>
</properties>

<dependencies>
  <dependency>
    <groupId>org.apache.flink</groupId>
    <artifactId>flink-java</artifactId>
    <version>${flink.version}</version>
 </dependency>
 <dependency>
   <groupId>org.apache.flink</groupId>
   <artifactId>flink-streaming-java_${scala.binary.version}</artifactId>
   <version>${flink.version}</version>
 </dependency>
 <dependency>
  <groupId>org.scala-lang</groupId>
  <artifactId>scala-library</artifactId>
   <version>${scala.version}</version>
 </dependency>

<!-- https://mvnrepository.com/artifact/org.apache.flink/flink-table -->

<!-- https://mvnrepository.com/artifact/org.apache.flink/flink-table-common -->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-table-common</artifactId>
<version>${flink.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.flink/flink-table-api-java -->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-table-api-java</artifactId>
<version>${flink.version}</version>
</dependency>
<!--
https://mvnrepository.com/artifact/org.apache.flink/flink-table-api-java-bridge -->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-table-api-java-bridge_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.flink/flink-table-planner -->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-table-planner_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
</dependency>

<!--  https://mvnrepository.com/artifact/org.apache.flink/flink-table-planner-blink -->
  <dependency>
    <groupId>org.apache.flink</groupId>
    <artifactId>flink-table-planner-blink_${scala.binary.version}</artifactId>
    <version>${flink.version}</version>
  </dependency>
 <dependency>
    <groupId>org.apache.iceberg</groupId>
    <artifactId>iceberg-flink-runtime</artifactId>
    <version>0.11.1</version>
 </dependency>
 <!-- https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-common -->
 <dependency>
   <groupId>org.apache.hadoop</groupId>
   <artifactId>hadoop-client</artifactId>
   <version>3.1.3</version>
 </dependency>
 <!-- https://mvnrepository.com/artifact/org.apache.flink/flink-clients -->
 <dependency>
   <groupId>org.apache.flink</groupId>
   <artifactId>flink-clients_${scala.binary.version}</artifactId>
   <version>${flink.version}</version>
 </dependency>
</dependencies>
</project>

8.2.1读取表数据

8.2.1.1batch read

package com.atguigu.iceberg.flink.sql;

import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; import org.apache.flink.table.data.RowData;
import  org.apache.iceberg.flink.TableLoader; import org.apache.iceberg.flink.source.FlinkSource;

public class TableOperations {

   public static void main(String[] args) throws Exception {

        StreamExecutionEnvironment env =
           StreamExecutionEnvironment.getExecutionEnvironment();
        TableLoader	tableLoader	= 
      
     TableLoader.fromHadoopTable("hdfs://mycluster/flink/warehouse/iceberg/testA");
           batchRead(env, tableLoader); env.execute();
   }

   public static void batchRead(StreamExecutionEnvironment env, TableLoader 
       tableLoader){

     DataStream<RowData>	batch	= 
     FlinkSource.forRowData().env(env).
     tableLoader(tableLoader).streaming(false).build();
     batch.map(item	->
     item.getInt(0)+"\t"+item.getString(1)+"\t"+item.getInt(2)
      +"\t"+item.getString(3)).prin t();
  }
}

8.2.1.2streaming read

public static void streamingRead(StreamExecutionEnvironment env, TableLoader tableLoader){

     DataStream<RowData>	stream	= 
 
     FlinkSource.forRowData().env(env).
      tableLoader(tableLoader).streaming(true).build();
      stream.print();
}

1)通过 streaming 的方式去读取数据

2)启动之后程序不会立马停止

3)因为是流处理，这个时候手动往表中追加一条数据

Flink SQL> insert into iceberg.testA values(3,'哈哈哈',18,'2021-07-01');

Iceberg实战踩坑指南可以看到控制台，实时打印出了数据

Iceberg实战踩坑指南

8.3写数据

8.3.1Appending Data

public static void appendingData(StreamExecutionEnvironment env,TableLoader tableLoader){

    DataStream<RowData>	batch	=. FlinkSource.forRowData().env(env).
    tableLoader(tableLoader).streaming(false).build(); TableLoader	tableB	=
    
    TableLoader.fromHadoopTable("hdfs://mycluster/flink/warehouse/iceberg/testB"); 
    FlinkSink.forRowData(batch).tableLoader(tableB).build();
}

使用上面 create table testB like testA 的 testB 表，读取 A 表数据插入到 B 表数据采用的是 batch 批处理，代码执行两次并查询查看 append 效果

8.3.3Overwrite Data

1)编写代码，将 overwrite 设置为 true

public static void overtData(StreamExecutionEnvironment env,TableLoader tableLoader){
    DataStream<RowData>	batch	=
      FlinkSource.forRowData().env(env).
      tableLoader(tableLoader).streaming(false).build(); TableLoader	tableB	=
      TableLoader.fromHadoopTable(
"hdfs://mycluster/flink/warehouse/iceberg/testB"); 
      FlinkSink.forRowData(batch).
      tableLoader(tableB).overwrite(true).build();
}

2)查询 testB 表查看 overwrite 效果，根据分区将数据进行了覆盖操作

Iceberg实战踩坑指南

8.4模拟数仓

flink 操作iceberg 的示例代码文章来源地址https://www.toymoban.com/news/detail-498997.html

第 9 章 Flink 存在的问题

Flink 不支持 Iceberg 隐藏分区
不支持通过计算列创建表
不支持创建带水位线的表
不支持添加列、删除列、重命名列

到了这里，关于Iceberg实战踩坑指南的文章就介绍完了。如果您还想了解更多内容，请在右上角搜索TOY模板网以前的文章或继续浏览下面的相关文章，希望大家以后多多支持TOY模板网！

Iceberg实战踩坑指南

前言

第 1 章 介绍

第 2 章 构建 Iceberg

第 3 章 Spark 操作

3.1.配置参数和 jar 包

3.2 Spark sql 操作

3.2.1over write 操作

3.2.2动态覆盖

3.2.3静态覆盖

3.2.4删除数据

​​​​​​​3.2.5历史快照

3.2.6隐藏分区（有 bug 时区不对）

第 4 章 DataFrame 操作

4.1.配置 Resources

​​​​​​​4.2配置 pom.xml

​​​​​​​4.3读取表​​​​​​​

4.4读取快照

4.5写入表

​​​​​​​4.5.1写入数据并创建表

​​​​​​4.5.1写数据

4.6模拟数仓

4.6.1表模型

4.6.2建表语句

4.6.3测试数据

4.6.5 yarn 测试

第 5 章 Structured Streaming 操作

5.1 基于 Structured Streaming 落明细数据

​​​​​​​5.1.1创建测试 topic

5.3 编写代码

5.4 提交 yarn 测试速度

第 6 章存在的问题和缺点

​​​​​​​6.1问题

​​​​​​​6.2缺点

第 7 章 Flink 操作

7.1配置参数和 jar 包

​​​​​​​7.2 Flink SQL Client

7.3 使用 Catalogs 创建目录

7.4 Flink SQL 操作

7.4.1建库

7.4.2建表（flink 不支持隐藏分区）

7.4.3 like 建表

7.4.4 insert into

7.4.5查询

7.4.6任务监控

第 8 章 Flink API 操作

8.1配置 pom.xml

8.2.1读取表数据

​​​​​​​8.3写数据

8.3.1Appending Data

8.3.3Overwrite Data

8.4模拟数仓

第 9 章 Flink 存在的问题

相关文章

觉得文章有用就打赏一下文章作者

支付宝扫一扫打赏

微信扫一扫打赏

支付宝扫一扫领取红包，优惠每天领

二维码1

二维码2

第 1 章介绍

第 2 章构建 Iceberg

3.2.5历史快照

4.2配置 pom.xml

4.3读取表

4.5.1写入数据并创建表

4.5.1写数据

5.1.1创建测试 topic

6.1问题

6.2缺点

7.2 Flink SQL Client

8.3写数据