Align external plugin trigger capability and metadata docs

plugins/PLUGIN_GUIDE.md

@@ -101,12 +101,14 @@ The manifest tells Tabularis everything about your plugin.
 | `schemas` | bool | `true` if the database supports named schemas (like PostgreSQL). Controls whether the schema selector is shown in the UI. |
 | `views` | bool | `true` if the database supports views. Enables the views section in the explorer. |
 | `routines` | bool | `true` if the database supports stored procedures/functions. |
+| `triggers` | bool | `true` if the database supports triggers. Enables trigger-related UI for drivers that implement the trigger RPCs. |
 | `file_based` | bool | `true` for local file databases (e.g., SQLite, DuckDB). Replaces host/port with a file path input in the connection form. |
 | `folder_based` | bool | `true` for plugins that connect to a directory rather than a single file (e.g. CSV plugin). Replaces host/port with a folder picker. |
 | `no_connection_required` | bool | `true` for API-based plugins that need no host, port, or credentials (e.g. a public REST API). Hides the entire connection form — the user only fills in the connection name. |
 | `connection_string` | bool | Set `false` to hide the connection string import UI for this driver. Defaults to `true` for network drivers. `file_based` and `folder_based` drivers skip the import UI automatically regardless of this flag. |
 | `connection_string_example` | string | Optional placeholder example shown in the connection string import field (e.g. `"clickhouse://user:pass@localhost:9000/db"`). Also accepted as camelCase `connectionStringExample`. |
 | `identifier_quote` | string | Character used to quote SQL identifiers. Use `"\""` for ANSI standard or `` "`" `` for MySQL style. |
+| `sql_dialect` | string | Optional statement-splitting dialect: `postgres`, `mysql`, `mssql`, `sqlite`, `oracle`, or `generic`. Oracle-like plugins, including DM/Dameng, should use `"oracle"`. |
 | `alter_primary_key` | bool | `true` if the database supports altering primary keys after table creation. |
 | `manage_tables` | bool | `true` to enable table and column management UI (Create Table, Add/Modify/Drop Column, Drop Table). Does not control index or FK operations. Defaults to `true`. |
 | `readonly` | bool | When `true`, the driver is read-only: all data modification operations (INSERT, UPDATE, DELETE) are disabled in the UI. The add/delete row buttons, inline cell editing, and context menu edit actions are hidden. Table and column management is also hidden regardless of `manage_tables`. Defaults to `false`. |
@@ -640,8 +642,8 @@ Get column information for a table.
     "name": "id",
     "data_type": "INTEGER",
     "is_nullable": false,
-    "column_default": null,
-    "is_primary_key": true,
+    "default_value": null,
+    "is_pk": true,
     "is_auto_increment": true,
     "comment": null
   }
@@ -798,6 +800,61 @@ Get the SQL body of a stored routine.
 
 ---
 
+### Triggers
+
+Set `capabilities.triggers` to `true` when your driver implements the trigger RPCs. Tabularis uses this flag to show trigger-related UI.
+
+#### `get_triggers`
+
+List triggers in a schema/database.
+
+**Params:** `{ "params": ConnectionParams, "schema": string | null }`
+
+**Result:**
+```json
+[
+  {
+    "name": "users_audit_trg",
+    "table_name": "users",
+    "event": "INSERT OR UPDATE",
+    "timing": "AFTER",
+    "definition": "CREATE TRIGGER users_audit_trg ..."
+  }
+]
+```
+
+---
+
+#### `get_trigger_definition`
+
+Get the SQL definition of a trigger.
+
+**Params:** `{ "params": ConnectionParams, "schema": string | null, "trigger_name": string, "table_name": string }`
+
+**Result:** `"CREATE TRIGGER users_audit_trg ..."`
+
+---
+
+#### `create_trigger`
+
+Create a trigger from SQL generated by the UI or entered in raw SQL mode.
+
+**Params:** `{ "params": ConnectionParams, "schema": string | null, "trigger_sql": string }`
+
+**Result:** `null` on success, or an error.
+
+---
+
+#### `drop_trigger`
+
+Drop a trigger.
+
+**Params:** `{ "params": ConnectionParams, "schema": string | null, "trigger_name": string, "table_name": string }`
+
+**Result:** `null` on success, or an error.
+
+---
+
 ### Query Execution
 
 #### `execute_query`

plugins/manifest.schema.json

@@ -75,6 +75,11 @@
           "type": "boolean",
           "description": "true to enable stored procedures and functions in the database explorer."
         },
+        "triggers": {
+          "type": "boolean",
+          "default": false,
+          "description": "true if the driver supports trigger metadata and trigger management RPCs."
+        },
         "file_based": {
           "type": "boolean",
           "description": "true for local file databases (e.g. SQLite, DuckDB). Replaces the host/port fields with a file path input."
@@ -109,6 +114,12 @@
           "enum": ["\"", "`"],
           "description": "Character used to quote SQL identifiers: double-quote for ANSI SQL, backtick for MySQL-style."
         },
+        "sql_dialect": {
+          "type": "string",
+          "enum": ["postgres", "mysql", "mssql", "sqlite", "oracle", "generic"],
+          "default": "postgres",
+          "description": "SQL dialect used by Tabularis for statement splitting and query classification. Oracle-like plugins can use oracle."
+        },
         "alter_primary_key": {
           "type": "boolean",
           "description": "true if the database supports altering primary keys after table creation."