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- 产品简介
- 购买指南
- 快速入门
- 操作指南
- 开发指南
- API 文档
- History
- Introduction
- API Category
- Making API Requests
- Cluster Operation APIs
- ModifyClusterConfigs
- ModifyInstanceKeyValConfigs
- ModifyNodeStatus
- RestartClusterForConfigs
- RestartClusterForNode
- CreateInstanceNew
- DestroyInstance
- ModifySecurityGroups
- ReduceInstance
- ResizeDisk
- ScaleOutInstance
- ScaleUpInstance
- DescribeClusterConfigsHistory
- ModifyInstance
- DescribeCreateTablesDDL
- DescribeInstanceOperationHistory
- Database and Table APIs
- Cluster Information Viewing APIs
- Hot-Cold Data Layering APIs
- Database and Operation Audit APIs
- CancelBackupJob
- CreateBackUpSchedule
- DeleteBackUpData
- DescribeBackUpJob
- DescribeBackUpJobDetail
- DescribeBackUpTables
- DescribeBackUpTaskDetail
- DescribeRestoreTaskDetail
- DescribeBackUpSchedules
- RecoverBackUpJob
- DescribeInstanceOperations
- DescribeDatabaseAuditDownload
- DescribeDatabaseAuditRecords
- DescribeSlowQueryRecords
- DescribeSlowQueryRecordsDownload
- DescribeQueryAnalyse
- User and Permission APIs
- Resource Group Management APIs
- Data Types
- Error Codes
- 云上生态
- 实践教程
- 性能测试
- 常见问题
- 服务等级协议
- 联系我们
- 词汇表
- 产品协议
Mutil Catalog Hudi 提供了腾讯云数据仓库 TCHouse-D 直接访问 Hudi 外部表的能力，外部表省去了繁琐的数据导入工作，并借助腾讯云数据仓库 TCHouse-D 本身的 OLAP 的能力来解决 Hudi 表的数据分析问题：
1、支持 Hudi 数据源接入腾讯云数据仓库 TCHouse-D。
2、支持腾讯云数据仓库 TCHouse-D 与 Hudi 数据源中的表联合查询，进行更加复杂的分析操作。
本文档主要介绍该功能的使用方式和注意事项等。
说明：
该功能适用于腾讯云数据仓库 TCHouse-D 1.2及后续版本。
Hudi 目前仅支持 Copy On Write 表的 Snapshot Query，以及 Merge On Read 表的 Read Optimized Query。
创建方法
数据在 HDFS 上：
CREATE CATALOG hudi PROPERTIES ('type'='hms','hive.metastore.uris' = 'thrift://172.21.xxx:7004','hadoop.username' = 'hadoop','dfs.nameservices'='your-nameservice','dfs.ha.namenodes.your-nameservice'='nn1,nn2','dfs.namenode.rpc-address.your-nameservice.nn1'='172.21.xxx:4007','dfs.namenode.rpc-address.your-nameservice.nn2'='172.21.xxx:4007','dfs.client.failover.proxy.provider.your-nameservice'='org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider');
数据在 COS 上：
CREATE CATALOG `hudi_cos` PROPERTIES ("AWS_ENDPOINT" = "cos.ap-guangzhou.myqcloud.com","AWS_REGION" = "ap-guangzhou","hive.metastore.uris" = "thrift://172.16.xxxx:7004","type" = "hms","AWS_SECRET_KEY" = "Wu9ByN6g4D8seHj0770jJxxxx","AWS_ACCESS_KEY" = "AKIDaWJcCi9Rc4TqjV9hYHn9NRxxxxx");
类型匹配
支持的 Hudi 列类型与 Doris 对应关系如下表：
HMS Type | Doris Type | Comment |
boolean | boolean | - |
tinyint | tinyint | - |
smallint | smallint | - |
int | int | - |
bigint | bigint | - |
date | date | - |
timestamp | datetime | - |
float | float | - |
double | double | - |
char | char | - |
varchar | varchar | - |
decimal | decimal | - |
array<type> | array<type> | 支持 array 嵌套，如 array<array<int>> |
map<KeyType, ValueType> | map<KeyType, ValueType> | 暂不支持嵌套，KeyType 和 ValueType 需要为基础类型 |
struct<col1: Type1, col2: Type2, ...> | struct<col1: Type1, col2: Type2, ...> | 暂不支持嵌套，Type1, Type2, ... 需要为基础类型 |
other | unsupported | - |
查询用法
与普通的 Doris OLAP 表并无区别
select * from hudi_catalog_name.database_name.table_name;
是
否
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