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Tencent Cloud WeData

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WeData API 2025-08-06
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Glossary
DocumentaçãoTencent Cloud WeDataOperation GuideProject ManagementSystem CatalogSystem Catalog Overview

System Catalog Overview

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Última atualização: 2025-12-29 14:54:10

What Is a System Catalog

System Catalog is managed database tables in WeData, used to store operation data generated under your account. You can use historical tables to view historical data and process data as needed for retrospective analysis.

Usage Requirements

Accessing system catalog must use DLC Data Source. Other data sources do not currently support system table capacity.
Accessing system catalog must use tc-catalog.

Others

The current system table is a full non-partitioned table, which performs a full data overwrite every 5 minutes. If you need to use historic moment data, you need to configure a minute-level offline task to perform data write to your own table.
System tables are only readable and grantable by the root account by default. The root account can grant read permission to sub-accounts on demand.
All system tables are placed under system_catalog.wedata.

Existing System Tables

Table Classification
Description(Optional)
Data Update Frequency
Development and Ops system table
Store operation data generated during development and Ops, including the tables below:
Task information table
Task dependency information table
Task scheduling information table
Parameter information table
Workflow information table
Instance running information table
Update every 5 minutes
Basic system table
Store operation data generated by the basic module, as shown in the table below:
Data source information table
Update every 5 minutes
Anterior: Storage and Computing Engine ConfigurationPróximo: Development and Ops System Tables

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