feat: Implement procedure to alter a table for mito engine (#1259)

* feat: wip

* fix: Fix CreateMitoTable::table_schema not initialized from json

* feat: Implement AlterMitoTable procedure

* test: Add test for alter procedure

* feat: Register alter procedure

* fix: Recover procedures after catalog manager is started

* feat: Simplify usage of table schema in create table procedure

* test: Add rename test

* test: Add drop columns test

src/table/src/engine.rs

@@ -121,6 +121,13 @@ pub trait TableEngineProcedure: Send + Sync {
         ctx: &EngineContext,
         request: CreateTableRequest,
     ) -> Result<BoxedProcedure>;
+
+    /// Returns a procedure that alters table by specific `request`.
+    fn alter_table_procedure(
+        &self,
+        ctx: &EngineContext,
+        request: AlterTableRequest,
+    ) -> Result<BoxedProcedure>;
 }
 
 pub type TableEngineProcedureRef = Arc<dyn TableEngineProcedure>;

src/table/src/requests.rs

@@ -136,7 +136,7 @@ pub struct OpenTableRequest {
 }
 
 /// Alter table request
-#[derive(Debug)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct AlterTableRequest {
     pub catalog_name: String,
     pub schema_name: String,
@@ -151,13 +151,13 @@ impl AlterTableRequest {
 }
 
 /// Add column request
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct AddColumnRequest {
     pub column_schema: ColumnSchema,
     pub is_key: bool,
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub enum AlterKind {
     AddColumns { columns: Vec<AddColumnRequest> },
     DropColumns { names: Vec<String> },