Implementation:Apache Shardingsphere ViewMetaDataPersistService Persist

Knowledge Sources	Apache_Shardingsphere
Domains	Persistence, Metadata
Last Updated	2026-02-10 00:00 GMT

Overview

Versioned persistence service for view metadata with load, persist, and drop operations.

Description

ViewMetaDataPersistService manages the persistence of SQL view metadata in the registry center with version management through VersionPersistService. It handles loading individual and batch views, persisting new or updated view definitions, and dropping view metadata.

Usage

Used by DatabaseMetaDataPersistFacade and SchemaMetaDataPersistService to manage view persistence during DDL operations.

Code Reference

Source Location

• Repository: Apache_Shardingsphere
• File: ViewMetaDataPersistService.java
• Lines: 1-98

Signature

@RequiredArgsConstructor
public final class ViewMetaDataPersistService {

    private final PersistRepository repository;

    public Map<String, ShardingSphereView> load(String databaseName, String schemaName);
    public ShardingSphereView load(String databaseName, String schemaName, String viewName);
    public Collection<MetaDataVersion> persist(String databaseName, String schemaName,
        Map<String, ShardingSphereView> views);
    public void drop(String databaseName, String schemaName, String viewName);
}

Import

import org.apache.shardingsphere.mode.metadata.persist.metadata.service.ViewMetaDataPersistService;

I/O Contract

Inputs

Name	Type	Required	Description
databaseName	String	Yes	Target database
schemaName	String	Yes	Target schema
views	Map<String, ShardingSphereView>	Varies	View metadata to persist

Outputs

Name	Type	Description
load() returns	Map<String, ShardingSphereView>	All views in a schema
persist() returns	Collection<MetaDataVersion>	Version records for persisted views

Usage Examples

ViewMetaDataPersistService service = persistFacade.getViewMetaDataService();

// Load all views for a schema
Map<String, ShardingSphereView> views = service.load("my_db", "public");

// Persist updated views
Collection<MetaDataVersion> versions = service.persist("my_db", "public", updatedViews);

// Drop a view
service.drop("my_db", "public", "my_view");

Related Pages

• Principle:Apache_Shardingsphere_Metadata_Repository_Persistence