feat: support renaming table in the catalog manger (GreptimeTeam#824)

* feat: support renaming table in the catalog manger

* feat: implement rename table for local catalog manager

* chore: fmt code

* fix: update system catalog when renaming table in local catalog manager

* chore: add instance test for rename table

* chore: fix frontend test

* chore: fix comment

* chore: fix rename table test

* fix: renaming a table with an existing name

* fix: improve the system catalog's renaming process

* chore: improve the code

* chore: improve the comment

Co-authored-by: Yingwen <[email protected]>

* chore: improve the code

* chore: fix tests

* chore: fix instance_test

* chore: improve the code

Co-authored-by: Yingwen <[email protected]>

src/catalog/src/lib.rs

@@ -97,6 +97,9 @@ pub trait CatalogManager: CatalogList {
     /// schema registered.
     async fn register_schema(&self, request: RegisterSchemaRequest) -> Result<bool>;
 
+    /// Rename a table to [RenameTableRequest::new_table_name], returns whether the table is renamed.
+    async fn rename_table(&self, request: RenameTableRequest) -> Result<bool>;
+
     /// Register a system table, should be called before starting the manager.
     async fn register_system_table(&self, request: RegisterSystemTableRequest)
         -> error::Result<()>;
@@ -142,6 +145,15 @@ impl Debug for RegisterTableRequest {
     }
 }
 
+#[derive(Debug, Clone)]
+pub struct RenameTableRequest {
+    pub catalog: String,
+    pub schema: String,
+    pub table_name: String,
+    pub new_table_name: String,
+    pub table_id: TableId,
+}
+
 #[derive(Clone)]
 pub struct DeregisterTableRequest {
     pub catalog: String,

src/catalog/src/local/manager.rs

@@ -47,7 +47,8 @@ use crate::tables::SystemCatalog;
 use crate::{
     format_full_table_name, handle_system_table_request, CatalogList, CatalogManager,
     CatalogProvider, CatalogProviderRef, DeregisterTableRequest, RegisterSchemaRequest,
-    RegisterSystemTableRequest, RegisterTableRequest, SchemaProvider, SchemaProviderRef,
+    RegisterSystemTableRequest, RegisterTableRequest, RenameTableRequest, SchemaProvider,
+    SchemaProviderRef,
 };
 
 /// A `CatalogManager` consists of a system catalog and a bunch of user catalogs.
@@ -379,6 +380,45 @@ impl CatalogManager for LocalCatalogManager {
         }
     }
 
+    async fn rename_table(&self, request: RenameTableRequest) -> Result<bool> {
+        let started = self.init_lock.lock().await;
+
+        ensure!(
+            *started,
+            IllegalManagerStateSnafu {
+                msg: "Catalog manager not started",
+            }
+        );
+
+        let catalog_name = &request.catalog;
+        let schema_name = &request.schema;
+
+        let catalog = self
+            .catalogs
+            .catalog(catalog_name)?
+            .context(CatalogNotFoundSnafu { catalog_name })?;
+
+        let schema = catalog
+            .schema(schema_name)?
+            .with_context(|| SchemaNotFoundSnafu {
+                catalog: catalog_name,
+                schema: schema_name,
+            })?;
+
+        // rename table in system catalog
+        self.system
+            .register_table(
+                catalog_name.clone(),
+                schema_name.clone(),
+                request.new_table_name.clone(),
+                request.table_id,
+            )
+            .await?;
+        Ok(schema
+            .rename_table(&request.table_name, request.new_table_name)
+            .is_ok())
+    }
+
     async fn deregister_table(&self, _request: DeregisterTableRequest) -> Result<bool> {
         UnimplementedSnafu {
             operation: "deregister table",

src/catalog/src/local/memory.rs

@@ -25,11 +25,14 @@ use table::metadata::TableId;
 use table::table::TableIdProvider;
 use table::TableRef;
 
-use crate::error::{CatalogNotFoundSnafu, Result, SchemaNotFoundSnafu, TableExistsSnafu};
+use crate::error::{
+    CatalogNotFoundSnafu, Result, SchemaNotFoundSnafu, TableExistsSnafu, TableNotFoundSnafu,
+};
 use crate::schema::SchemaProvider;
 use crate::{
     CatalogList, CatalogManager, CatalogProvider, CatalogProviderRef, DeregisterTableRequest,
-    RegisterSchemaRequest, RegisterSystemTableRequest, RegisterTableRequest, SchemaProviderRef,
+    RegisterSchemaRequest, RegisterSystemTableRequest, RegisterTableRequest, RenameTableRequest,
+    SchemaProviderRef,
 };
 
 /// Simple in-memory list of catalogs
@@ -89,6 +92,25 @@ impl CatalogManager for MemoryCatalogManager {
             .map(|v| v.is_none())
     }
 
+    async fn rename_table(&self, request: RenameTableRequest) -> Result<bool> {
+        let catalogs = self.catalogs.write().unwrap();
+        let catalog = catalogs
+            .get(&request.catalog)
+            .context(CatalogNotFoundSnafu {
+                catalog_name: &request.catalog,
+            })?
+            .clone();
+        let schema = catalog
+            .schema(&request.schema)?
+            .with_context(|| SchemaNotFoundSnafu {
+                catalog: &request.catalog,
+                schema: &request.schema,
+            })?;
+        Ok(schema
+            .rename_table(&request.table_name, request.new_table_name)
+            .is_ok())
+    }
+
     async fn deregister_table(&self, request: DeregisterTableRequest) -> Result<bool> {
         let catalogs = self.catalogs.write().unwrap();
         let catalog = catalogs
@@ -290,6 +312,20 @@ impl SchemaProvider for MemorySchemaProvider {
         }
     }
 
+    fn rename_table(&self, name: &str, new_name: String) -> Result<TableRef> {
+        let mut tables = self.tables.write().unwrap();
+        if tables.get(name).is_some() {
+            let table = tables.remove(name).unwrap();
+            tables.insert(new_name, table.clone());
+            Ok(table)
+        } else {
+            TableNotFoundSnafu {
+                table_info: name.to_string(),
+            }
+            .fail()?
+        }
+    }
+
     fn deregister_table(&self, name: &str) -> Result<Option<TableRef>> {
         let mut tables = self.tables.write().unwrap();
         Ok(tables.remove(name))
@@ -354,6 +390,85 @@ mod tests {
         assert_eq!(StatusCode::TableAlreadyExists, err.status_code());
     }
 
+    #[tokio::test]
+    async fn test_mem_provider_rename_table() {
+        let provider = MemorySchemaProvider::new();
+        let table_name = "num";
+        assert!(!provider.table_exist(table_name).unwrap());
+        let test_table: TableRef = Arc::new(NumbersTable::default());
+        // register test table
+        assert!(provider
+            .register_table(table_name.to_string(), test_table.clone())
+            .unwrap()
+            .is_none());
+        assert!(provider.table_exist(table_name).unwrap());
+
+        // rename test table
+        let new_table_name = "numbers";
+        provider
+            .rename_table(table_name, new_table_name.to_string())
+            .unwrap();
+
+        // test old table name not exist
+        assert!(!provider.table_exist(table_name).unwrap());
+        assert!(provider.deregister_table(table_name).unwrap().is_none());
+
+        // test new table name exists
+        assert!(provider.table_exist(new_table_name).unwrap());
+        let registered_table = provider.table(new_table_name).unwrap().unwrap();
+        assert_eq!(
+            registered_table.table_info().ident.table_id,
+            test_table.table_info().ident.table_id
+        );
+
+        let other_table = Arc::new(NumbersTable::new(2));
+        let result = provider.register_table(new_table_name.to_string(), other_table);
+        let err = result.err().unwrap();
+        assert_eq!(StatusCode::TableAlreadyExists, err.status_code());
+    }
+
+    #[tokio::test]
+    async fn test_catalog_rename_table() {
+        let catalog = MemoryCatalogManager::default();
+        let schema = catalog
+            .schema(DEFAULT_CATALOG_NAME, DEFAULT_SCHEMA_NAME)
+            .unwrap()
+            .unwrap();
+
+        // register table
+        let table_name = "num";
+        let table_id = 2333;
+        let table: TableRef = Arc::new(NumbersTable::new(table_id));
+        let register_table_req = RegisterTableRequest {
+            catalog: DEFAULT_CATALOG_NAME.to_string(),
+            schema: DEFAULT_SCHEMA_NAME.to_string(),
+            table_name: table_name.to_string(),
+            table_id,
+            table,
+        };
+        assert!(catalog.register_table(register_table_req).await.unwrap());
+        assert!(schema.table_exist(table_name).unwrap());
+
+        // rename table
+        let new_table_name = "numbers";
+        let rename_table_req = RenameTableRequest {
+            catalog: DEFAULT_CATALOG_NAME.to_string(),
+            schema: DEFAULT_SCHEMA_NAME.to_string(),
+            table_name: table_name.to_string(),
+            new_table_name: new_table_name.to_string(),
+            table_id,
+        };
+        assert!(catalog.rename_table(rename_table_req).await.unwrap());
+        assert!(!schema.table_exist(table_name).unwrap());
+        assert!(schema.table_exist(new_table_name).unwrap());
+
+        let registered_table = catalog
+            .table(DEFAULT_CATALOG_NAME, DEFAULT_SCHEMA_NAME, new_table_name)
+            .unwrap()
+            .unwrap();
+        assert_eq!(registered_table.table_info().ident.table_id, table_id);
+    }
+
     #[test]
     pub fn test_register_if_absent() {
         let list = MemoryCatalogManager::default();

src/catalog/src/remote/manager.rs

@@ -43,7 +43,7 @@ use crate::remote::{Kv, KvBackendRef};
 use crate::{
     handle_system_table_request, CatalogList, CatalogManager, CatalogProvider, CatalogProviderRef,
     DeregisterTableRequest, RegisterSchemaRequest, RegisterSystemTableRequest,
-    RegisterTableRequest, SchemaProvider, SchemaProviderRef,
+    RegisterTableRequest, RenameTableRequest, SchemaProvider, SchemaProviderRef,
 };
 
 /// Catalog manager based on metasrv.
@@ -449,6 +449,13 @@ impl CatalogManager for RemoteCatalogManager {
         Ok(true)
     }
 
+    async fn rename_table(&self, _request: RenameTableRequest) -> Result<bool> {
+        UnimplementedSnafu {
+            operation: "rename table",
+        }
+        .fail()
+    }
+
     async fn register_system_table(&self, request: RegisterSystemTableRequest) -> Result<()> {
         let mut requests = self.system_table_requests.lock().await;
         requests.push(request);
@@ -739,6 +746,13 @@ impl SchemaProvider for RemoteSchemaProvider {
         prev
     }
 
+    fn rename_table(&self, _name: &str, _new_name: String) -> Result<TableRef> {
+        UnimplementedSnafu {
+            operation: "rename table",
+        }
+        .fail()
+    }
+
     fn deregister_table(&self, name: &str) -> Result<Option<TableRef>> {
         let table_name = name.to_string();
         let table_key = self.build_regional_table_key(&table_name).to_string();

src/catalog/src/schema.rs

@@ -35,6 +35,10 @@ pub trait SchemaProvider: Sync + Send {
     /// If a table of the same name existed before, it returns "Table already exists" error.
     fn register_table(&self, name: String, table: TableRef) -> Result<Option<TableRef>>;
 
+    /// If supported by the implementation, renames an existing table from this schema and returns it.
+    /// If no table of that name exists, returns "Table not found" error.
+    fn rename_table(&self, name: &str, new_name: String) -> Result<TableRef>;
+
     /// If supported by the implementation, removes an existing table from this schema and returns it.
     /// If no table of that name exists, returns Ok(None).
     fn deregister_table(&self, name: &str) -> Result<Option<TableRef>>;

src/catalog/src/system.rs

@@ -186,11 +186,23 @@ fn build_system_catalog_schema() -> Schema {
     SchemaBuilder::try_from(cols).unwrap().build().unwrap()
 }
 
-pub fn build_table_insert_request(full_table_name: String, table_id: TableId) -> InsertRequest {
+/// Formats key string for table entry in system catalog
+#[inline]
+pub fn format_table_entry_key(catalog: &str, schema: &str, table_id: TableId) -> String {
+    format!("{catalog}.{schema}.{table_id}")
+}
+
+pub fn build_table_insert_request(
+    catalog: String,
+    schema: String,
+    table_name: String,
+    table_id: TableId,
+) -> InsertRequest {
+    let entry_key = format_table_entry_key(&catalog, &schema, table_id);
     build_insert_request(
         EntryType::Table,
-        full_table_name.as_bytes(),
-        serde_json::to_string(&TableEntryValue { table_id })
+        entry_key.as_bytes(),
+        serde_json::to_string(&TableEntryValue { table_name })
             .unwrap()
             .as_bytes(),
     )
@@ -285,8 +297,8 @@ pub fn decode_system_catalog(
         }
 
         EntryType::Table => {
-            // As for table entry, the key is a string with format: `<catalog_name>.<schema_name>.<table_name>`
-            // and the value is a JSON string with format: `{"table_id": <table_id>}`
+            // As for table entry, the key is a string with format: `<catalog_name>.<schema_name>.<table_id>`
+            // and the value is a JSON string with format: `{"table_name": <table_name>}`
             let table_parts = key.split('.').collect::<Vec<_>>();
             ensure!(
                 table_parts.len() >= 3,
@@ -298,11 +310,12 @@ pub fn decode_system_catalog(
             debug!("Table meta value: {}", String::from_utf8_lossy(value));
             let table_meta: TableEntryValue =
                 serde_json::from_slice(value).context(ValueDeserializeSnafu)?;
+            let table_id = table_parts[2].parse::<TableId>().unwrap();
             Ok(Entry::Table(TableEntry {
                 catalog_name: table_parts[0].to_string(),
                 schema_name: table_parts[1].to_string(),
-                table_name: table_parts[2].to_string(),
-                table_id: table_meta.table_id,
+                table_name: table_meta.table_name,
+                table_id,
             }))
         }
     }
@@ -362,7 +375,7 @@ pub struct TableEntry {
 
 #[derive(Debug, Serialize, Deserialize, PartialEq, Eq)]
 pub struct TableEntryValue {
-    pub table_id: TableId,
+    pub table_name: String,
 }
 
 #[cfg(test)]
@@ -415,8 +428,8 @@ mod tests {
     pub fn test_decode_table() {
         let entry = decode_system_catalog(
             Some(EntryType::Table as u8),
-            Some("some_catalog.some_schema.some_table".as_bytes()),
-            Some("{\"table_id\":42}".as_bytes()),
+            Some("some_catalog.some_schema.42".as_bytes()),
+            Some("{\"table_name\":\"some_table\"}".as_bytes()),
         )
         .unwrap();
 
@@ -435,7 +448,7 @@ mod tests {
     pub fn test_decode_mismatch() {
         decode_system_catalog(
             Some(EntryType::Table as u8),
-            Some("some_catalog.some_schema.some_table".as_bytes()),
+            Some("some_catalog.some_schema.42".as_bytes()),
             None,
         )
         .unwrap();

src/catalog/src/tables.rs

@@ -40,9 +40,7 @@ use table::{Table, TableRef};
 
 use crate::error::{Error, InsertCatalogRecordSnafu};
 use crate::system::{build_schema_insert_request, build_table_insert_request, SystemCatalogTable};
-use crate::{
-    format_full_table_name, CatalogListRef, CatalogProvider, SchemaProvider, SchemaProviderRef,
-};
+use crate::{CatalogListRef, CatalogProvider, SchemaProvider, SchemaProviderRef};
 
 /// Tables holds all tables created by user.
 pub struct Tables {
@@ -233,6 +231,10 @@ impl SchemaProvider for InformationSchema {
         panic!("System catalog & schema does not support register table")
     }
 
+    fn rename_table(&self, _name: &str, _new_name: String) -> crate::error::Result<TableRef> {
+        unimplemented!("System catalog & schema does not support rename table")
+    }
+
     fn deregister_table(&self, _name: &str) -> crate::error::Result<Option<TableRef>> {
         panic!("System catalog & schema does not support deregister table")
     }
@@ -269,8 +271,7 @@ impl SystemCatalog {
         table_name: String,
         table_id: TableId,
     ) -> crate::error::Result<usize> {
-        let full_table_name = format_full_table_name(&catalog, &schema, &table_name);
-        let request = build_table_insert_request(full_table_name, table_id);
+        let request = build_table_insert_request(catalog, schema, table_name, table_id);
         self.information_schema
             .system
             .insert(request)