Metadata Information

Data Lake Compute

Product Introduction

Purchase Guide

Configuration Adjustment Fees

Getting Started

Complete Process for New User Activation

DLC Data Import Guide

Quick Start with Data Analytics in Data Lake Compute

Quick Start with Permission Management in Data Lake Compute

Quick Start with Partition Table

Enabling Data Optimization

Cross-Source Analysis of EMR Hive Data

Standard Engine Configuration Guide

Operation Guide

Console Operation Introduction

Data Development and Exploration

Data Exploration

SQL Editor

Data Query Task

SELECT Task

Querying Partition Table

Querying JSON Data

Querying Data from Other Sources

Using View

INSERT INTO

Querying Script Parameters

Obtaining Task Results

Query Script Analysis

Data Job

Overview

Configuring Data Access Policy

Creating Data Job

Managing Data Job

PySpark Dependency Package Management

Resource Management

Engine Management

Network Connection Configuration

Storage Configuration

Managed Storage Configuration

Binding a Metadata Acceleration Bucket

Metadata Management

Data Catalogs and DMC

Data Table Management

Data View Management

Function Management

Partition Field Policy

Ops Management

Historical Task Instances

Historical task(Old version)

Session Management

Insight Management

Task Insights

System Management

User and Permission Management

CAM Service

Permission Overview

User and Work Group

Sub-Account Permission Management

Monitoring and Alarms

Data Engine Monitoring

Data Job Monitoring

Access Point Gateway Engine Monitoring

Monitoring Alarm Configuration

Audit Log

Development Guide

SparkJar Job Development Guide

PySpark Job Development Guide

Query Performance Optimization Guide

UDF Function Development Guide

Materialized View

System Restraints

Metadata Information

Computing Task

Client Access

JDBC Access

DLC JDBC Access

Hive JDBC Access

Presto JDBC Access

Configuring Public Access for Standard Engine

TDLC Command Line Interface Tool Access

Third-party Software Linkage

Python Access

Practical Tutorial

Table Creation Practice

Using Apache Airflow to Schedule DLC Engine to Submit Tasks

Direct Query of DLC Internal Storage with StarRocks

DLC Native Table

DLC Source Table Core Capabilities

DLC Source Table Operation Configuration

DLC Source Table Lake Ingestion Practice

DLC Source Table FAQs

SQL Statement

SuperSQL Statement

Overview of SuperSQL Statement

Unified Statement

DDL Statement

ALTER DATABASE

ALTER DATABASE SET DBPROPERTIES

ALTER DATABASE SET LOCATION

DROP DATABASE

CREATE TABLE

REPLACE TABLE AS SELECT

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

ALTER VIEW

ALTER VIEW SET TBLPROPERTIES

DML Statement

DQL Statement

Iceberg Table Statement

Differences in Statement Between Iceberg External Tables and Native Tables

Materialized View Statement

SQL Implicit Conversion

Functions

Unified Functions

Overview of Unified Functions

Binary Functions

Bitwise Functions

Collection Functions

Date and Time Functions

JSON Functions

Mathematical Functions

Presto Built-in Functions

Comparison of Hive Functions

Overview of Standard Spark Statement

Overview of Standard Presto Statement

API Documentation

Making API Requests

Data Table APIs

DescribeLakeFsDirSummary

DescribeLakeFsInfo

QueryResult

GenerateCreateMangedTableSql

Task APIs

Metadata APIs

DescribeForbiddenTablePro

DescribeDLCCatalogAccess

GrantDLCCatalogAccess

RevokeDLCCatalogAccess

DropDMSTable

DropDLCTable

DescribeDMSDatabaseList

Service Configuration APIs

CreateCHDFSBindingProduct

DeleteCHDFSBindingProduct

DescribeOtherCHDFSBindingList

CreateStoreLocation

DescribeStoreLocation

ModifyDataEngineDescription

RollbackDataEngineImage

SwitchDataEngine

SwitchDataEngineImage

UpgradeDataEngineImage

DeleteThirdPartyAccessUser

DescribeDataEngineImageVersions

DescribeSubUserAccessPolicy

DescribeThirdPartyAccessUser

RegisterThirdPartyAccessUser

RestartDataEngine

UpdateUserDataEngineConfig

UpdateDataEngineConfig

Permission Management APIs

Database APIs

ModifyAdvancedStoreLocation

ModifyGovernEventRule

DescribeAdvancedStoreLocation

Data Source Connection APIs

CheckDataEngineImageCanBeRollback

CheckDataEngineImageCanBeUpgrade

DescribeDataEnginePythonSparkImages

Data Optimization APIs

GetOptimizerPolicy

Data Engine APIs

CreateDataEngine

DescribeDataEnginesScaleDetail

DeleteDataEngine

RenewDataEngine

SuspendResumeDataEngine

UpdateDataEngine

DescribeUpdatableDataEngines

DescribeDataEngine

DescribeUserDataEngineConfig

CheckDataEngineConfigPairsValidity

General Reference

Operation Guide on Connecting Third-Party Software to DLC

Connecting CBoard to DLC

DLC Policy

Data Privacy And Security Agreement

Service Level Agreement

DocumentationData Lake ComputeDevelopment GuideSystem RestraintsMetadata Information

Metadata Information

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Last updated: 2024-07-17 18:17:23

Metadata Information

Last updated: 2024-07-17 18:17:23

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The following lists the limits on the numbers of databases, data tables, attribute columns, and partitions.
Item
Maximum Number
Databases per account
1,000
Data tables per account
10,000
Tables per database
4,096
Columns per data table
4,096
Partitions per table
10,000
Partitions per root account
1,000,000
Fields per table
4,096
Custom functions per account
100
Catalogs that can be created
20
Database
Name: It can contain up to 127 characters and must be unique in a data link.
Description: It can contain up to 2,048 characters.
Data address of an external table (COS address): It can contain up to 888 characters (COS path length limit).
Parameter: It is in the Map<string:string> format and can contain up to 127 characters. All parameters can contain up to 3,000 characters in total.
Data table/View
Name: It can contain up to 127 characters and must be unique in a database.
Description: It can contain up to 1,000 characters.
Data address of an external table (COS address): It can contain up to 888 characters (COS path length limit).
Parameter: It is in the Map<string:string> format and can contain up to 127 characters. All parameters can contain up to 512,000 characters in total.
Attribute column
Name: It can contain up to 127 characters and must be unique in a data table.
Description: It can contain up to 256 characters.
Field value: It can contain up to 131,072 characters. Longer values cannot be created.
Partition
Partition field name: It can contain up to 127 characters.

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Item	Maximum Number
Databases per account	1,000
Data tables per account	10,000
Tables per database	4,096
Columns per data table	4,096
Partitions per table	10,000
Partitions per root account	1,000,000
Fields per table	4,096
Custom functions per account	100
Catalogs that can be created	20

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