- 产品简介
- 购买指南
- 快速入门
- 操作指南
- 开发指南
- 客户端访问
- 实践教程
- SQL 语法
- SuperSQL 语法
- SuperSQL 语法概览
- 统一语法
- 常用数据类型
- DDL 语法
- CREATE DATABASE
- SHOW DATABASES
- DESCRIBE DATABASE
- ALTER DATABASE
- DROP DATABASE
- CREATE TABLE
- REPLACE TABLE AS SELECT
- SHOW TABLES
- SHOW CREATE TABLE
- SHOW TBLPROPERTIES
- DESCRIBE TABLE
- SHOW COLUMNS IN TABLE
- ALTER TABLE
- ALTER TABLE ADD COLUMNS
- ALTER TABLE ADD COLUMN AFTER/FIRST
- ALTER TABLE DROP COLUMN
- ALTER TABLE ADD PARTATION
- SHOW PARTITIONS
- ALTER TABLE DROP PARTITION
- ALTER TABLE ADD PARTITION FIELD
- ALTER TABLE DROP PARTITION FIELD
- ALTER TABLE ... RENAME COLUMN
- ALTER TABLE SET TBLPROPERTIES
- ALTER TABLE SET LOCATION
- ALTER TABLE ... WRITE ORDERED BY
- ALTER TABLE ... WRITE DISTRIBUTED BY PARTITION
- ALTER TABLE ... SET IDENTIFIER FIELDS
- ALTER TABLE ... DROP IDENTIFIER FIELDS
- MSCK REPAIR TABLE
- ANALYZE TABLES
- DROP TABLE
- EXPLAIN
- CALL STATEMENT
- CREATE VIEW AS
- SHOW VIEWS
- DESCRIBE VIEW
- SHOW CREATE VIEW
- SHOW COLUMNS IN VIEW
- ALTER VIEW
- DROP VIEW
- CREATE FUNCTION
- SHOW FUNCTION
- DROP FUNCTION
- DML 语法
- DQL 语法
- Iceberg 表语法
- 物化视图语法
- SQL 隐式转换
- 函数
- 标准 Spark 语法概览
- 标准 Presto 语法概览
- 保留字
- SuperSQL 语法
- API 文档
- History
- Introduction
- API Category
- Making API Requests
- Data Table APIs
- Task APIs
- CreateSparkSessionBatchSQL
- CancelSparkSessionBatchSQL
- CancelTask
- CreateResultDownload
- CreateSparkAppTask
- CreateTask
- CreateTasks
- DeleteSparkApp
- DescribeEngineUsageInfo
- DescribeResultDownload
- DescribeSparkAppTasks
- DescribeTaskResult
- DescribeTasks
- QueryTaskCostDetail
- CreateSparkApp
- DescribeSparkAppJob
- DescribeSparkSessionBatchSqlLog
- ModifySparkApp
- DescribeSparkAppJobs
- ModifySparkAppBatch
- DescribeTaskStatistics
- DescribeQuery
- DescribeJobs
- DescribeJob
- Metadata APIs
- Service Configuration APIs
- CreateCHDFSBindingProduct
- DeleteCHDFSBindingProduct
- DescribeOtherCHDFSBindingList
- CreateStoreLocation
- DescribeStoreLocation
- ModifyDataEngineDescription
- RollbackDataEngineImage
- SwitchDataEngine
- SwitchDataEngineImage
- UpgradeDataEngineImage
- DeleteThirdPartyAccessUser
- DescribeDataEngineImageVersions
- DescribeSubUserAccessPolicy
- DescribeThirdPartyAccessUser
- RegisterThirdPartyAccessUser
- RestartDataEngine
- UpdateUserDataEngineConfig
- UpdateDataEngineConfig
- Permission Management APIs
- AddUsersToWorkGroup
- AttachUserPolicy
- AttachWorkGroupPolicy
- BindWorkGroupsToUser
- CreateUser
- CreateWorkGroup
- DeleteUser
- DeleteUsersFromWorkGroup
- DeleteWorkGroup
- DescribeUserInfo
- DescribeUserRoles
- DescribeUserType
- DescribeUsers
- DescribeWorkGroupInfo
- DescribeWorkGroups
- DetachUserPolicy
- DetachWorkGroupPolicy
- ModifyUser
- ModifyUserType
- ModifyWorkGroup
- UnbindWorkGroupsFromUser
- UpdateRowFilter
- CheckGrantedPermission
- Database APIs
- Data Source Connection APIs
- Data Optimization APIs
- Data Engine APIs
- Data Types
- Error Codes
- 通用类参考
- DLC 政策
- 服务等级协议
- 联系我们
- 产品简介
- 购买指南
- 快速入门
- 操作指南
- 开发指南
- 客户端访问
- 实践教程
- SQL 语法
- SuperSQL 语法
- SuperSQL 语法概览
- 统一语法
- 常用数据类型
- DDL 语法
- CREATE DATABASE
- SHOW DATABASES
- DESCRIBE DATABASE
- ALTER DATABASE
- DROP DATABASE
- CREATE TABLE
- REPLACE TABLE AS SELECT
- SHOW TABLES
- SHOW CREATE TABLE
- SHOW TBLPROPERTIES
- DESCRIBE TABLE
- SHOW COLUMNS IN TABLE
- ALTER TABLE
- ALTER TABLE ADD COLUMNS
- ALTER TABLE ADD COLUMN AFTER/FIRST
- ALTER TABLE DROP COLUMN
- ALTER TABLE ADD PARTATION
- SHOW PARTITIONS
- ALTER TABLE DROP PARTITION
- ALTER TABLE ADD PARTITION FIELD
- ALTER TABLE DROP PARTITION FIELD
- ALTER TABLE ... RENAME COLUMN
- ALTER TABLE SET TBLPROPERTIES
- ALTER TABLE SET LOCATION
- ALTER TABLE ... WRITE ORDERED BY
- ALTER TABLE ... WRITE DISTRIBUTED BY PARTITION
- ALTER TABLE ... SET IDENTIFIER FIELDS
- ALTER TABLE ... DROP IDENTIFIER FIELDS
- MSCK REPAIR TABLE
- ANALYZE TABLES
- DROP TABLE
- EXPLAIN
- CALL STATEMENT
- CREATE VIEW AS
- SHOW VIEWS
- DESCRIBE VIEW
- SHOW CREATE VIEW
- SHOW COLUMNS IN VIEW
- ALTER VIEW
- DROP VIEW
- CREATE FUNCTION
- SHOW FUNCTION
- DROP FUNCTION
- DML 语法
- DQL 语法
- Iceberg 表语法
- 物化视图语法
- SQL 隐式转换
- 函数
- 标准 Spark 语法概览
- 标准 Presto 语法概览
- 保留字
- SuperSQL 语法
- API 文档
- History
- Introduction
- API Category
- Making API Requests
- Data Table APIs
- Task APIs
- CreateSparkSessionBatchSQL
- CancelSparkSessionBatchSQL
- CancelTask
- CreateResultDownload
- CreateSparkAppTask
- CreateTask
- CreateTasks
- DeleteSparkApp
- DescribeEngineUsageInfo
- DescribeResultDownload
- DescribeSparkAppTasks
- DescribeTaskResult
- DescribeTasks
- QueryTaskCostDetail
- CreateSparkApp
- DescribeSparkAppJob
- DescribeSparkSessionBatchSqlLog
- ModifySparkApp
- DescribeSparkAppJobs
- ModifySparkAppBatch
- DescribeTaskStatistics
- DescribeQuery
- DescribeJobs
- DescribeJob
- Metadata APIs
- Service Configuration APIs
- CreateCHDFSBindingProduct
- DeleteCHDFSBindingProduct
- DescribeOtherCHDFSBindingList
- CreateStoreLocation
- DescribeStoreLocation
- ModifyDataEngineDescription
- RollbackDataEngineImage
- SwitchDataEngine
- SwitchDataEngineImage
- UpgradeDataEngineImage
- DeleteThirdPartyAccessUser
- DescribeDataEngineImageVersions
- DescribeSubUserAccessPolicy
- DescribeThirdPartyAccessUser
- RegisterThirdPartyAccessUser
- RestartDataEngine
- UpdateUserDataEngineConfig
- UpdateDataEngineConfig
- Permission Management APIs
- AddUsersToWorkGroup
- AttachUserPolicy
- AttachWorkGroupPolicy
- BindWorkGroupsToUser
- CreateUser
- CreateWorkGroup
- DeleteUser
- DeleteUsersFromWorkGroup
- DeleteWorkGroup
- DescribeUserInfo
- DescribeUserRoles
- DescribeUserType
- DescribeUsers
- DescribeWorkGroupInfo
- DescribeWorkGroups
- DetachUserPolicy
- DetachWorkGroupPolicy
- ModifyUser
- ModifyUserType
- ModifyWorkGroup
- UnbindWorkGroupsFromUser
- UpdateRowFilter
- CheckGrantedPermission
- Database APIs
- Data Source Connection APIs
- Data Optimization APIs
- Data Engine APIs
- Data Types
- Error Codes
- 通用类参考
- DLC 政策
- 服务等级协议
- 联系我们
为了便于 SQL 编写，快速从 Hive/Spark 语法切换到 DLC 统一的 SQL，我们提供了 SQL 的隐式转化能力，转化列表如下：
I：implicit cast，E: explicit cast，--: not allowed
From-To | null | boolean | tinyint | smallint | int | bigint | decimal | float/real | double | interval | date | time | timestamp | [var]char | [var]binary |
null | Ι | Ι | Ι | Ι | Ι | Ι | Ι | Ι | Ι | Ι | Ι | Ι | Ι | Ι | Ι |
boolean | -- | Ι | E | E | E | E | E | E | E | -- | -- | -- | -- | Ι | -- |
tinyint | -- | E | Ι | Ι | Ι | Ι | Ι | Ι | Ι | E | -- | -- | E | Ι | -- |
smallint | -- | E | Ι | Ι | Ι | Ι | Ι | Ι | Ι | E | -- | -- | E | Ι | -- |
int | -- | E | Ι | Ι | Ι | Ι | Ι | Ι | Ι | E | -- | -- | E | Ι | -- |
bigint | -- | E | Ι | Ι | Ι | Ι | Ι | Ι | Ι | E | -- | -- | E | Ι | -- |
decimal | -- | E | Ι | Ι | Ι | Ι | Ι | Ι | Ι | E | -- | -- | E | Ι | -- |
float/real | -- | E | Ι | Ι | Ι | Ι | Ι | Ι | Ι | -- | -- | -- | E | Ι | -- |
double | -- | E | Ι | Ι | Ι | Ι | Ι | Ι | Ι | -- | -- | -- | E | Ι | -- |
interval | -- | -- | E | E | E | E | E | -- | -- | Ι | -- | -- | -- | E | -- |
date | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Ι | -- | Ι | Ι | -- |
time | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Ι | E | Ι | -- |
timestamp | -- | -- | E | E | E | E | E | E | E | -- | Ι | E | Ι | Ι | -- |
[var]char | -- | E | Ι | Ι | Ι | Ι | Ι | Ι | Ι | Ι | Ι | Ι | Ι | Ι | Ι |
[var]binary | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | E | E | E | Ι | Ι |
是
否
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