feat: managed database widgets for Marimo

README.md

@@ -1,36 +1,57 @@
 # hotdata-marimo
 
-Marimo UI helpers for [Hotdata](https://hotdata.dev): run SQL from a notebook, browse catalog metadata, and render results as tables.
+Marimo widgets for [Hotdata](https://hotdata.dev): run SQL, browse catalogs, load managed databases, and display results in notebooks.
 
-## Features
+Requires Python 3.10+, [Marimo](https://marimo.io/), and [hotdata-runtime](https://github.com/hotdata-dev/hotdata-runtime) (installed automatically).
 
-- **Workspace-aware setup** — build a `HotdataClient` from environment variables, or use `workspace_selector_from_env()` to choose a workspace interactively when no workspace is pinned.
-- **Connection health** — show a compact status callout with API, workspace, and optional sandbox context.
-- **Catalog browsing** — browse Hotdata connections, schemas, tables, and columns from Marimo UI controls.
-- **SQL editor widget** — run SQL against Hotdata, cache the latest successful result, and render results in downstream reactive cells.
-- **Native `mo.sql` engine** — register `HotdataMarimoEngine` so Marimo SQL cells can execute through a live `HotdataClient` with `engine=client`.
-- **Result display helpers** — render query results, recent results, and run history as notebook-friendly UI.
-- **Marimo UI aliases** — importing `hotdata_marimo` attaches helpers such as `mo.ui.hotdata_sql_editor` and `mo.ui.hotdata_table_browser` for discoverability.
+## Supported widgets
+
+Importing `hotdata_marimo` registers `mo.ui.hotdata_*` aliases for discoverability.
+
+| Widget | Function | Notes |
+|--------|----------|-------|
+| SQL editor | `hm.sql_editor(client)` | Returns `.ui` and `.result` |
+| Table browser | `hm.table_browser(client)` | Browse connections, schemas, tables, columns |
+| Managed databases panel | `hm.databases_panel(client)` | Create catalogs and load parquet files |
+| Managed database writer | `hm.managed_database_writer(client)` | Lower-level create/load UI |
+| Workspace selector | `hm.workspace_selector_from_env()` | Pick workspace when `HOTDATA_WORKSPACE` is unset |
+| Connection picker | `hm.connection_picker(client)` | Dropdown of workspace connections |
+| Connection status | `hm.connection_status(client)` | API / workspace health callout |
+| Connections panel | `hm.connections_panel(client)` | Status callout plus connection list |
+| Query result | `hm.query_result(result)` | Render a `QueryResult` as a table |
+| Recent results | `hm.recent_results(client)` | Browse past query results |
+| Run history | `hm.run_history(client)` | Recent query runs |
+
+Each widget also has a `mo.ui.hotdata_*` alias (e.g. `mo.ui.hotdata_sql_editor`). Native Marimo SQL cells are supported via `hm.register_hotdata_sql_engine()` and `mo.sql(..., engine=client)`.
 
 ## Install
 
 ```bash
-uv pip install hotdata-marimo
-# or: pip install hotdata-marimo
+pip install hotdata-marimo
+```
+
+Set `HOTDATA_API_KEY`. Optionally set `HOTDATA_WORKSPACE`, `HOTDATA_API_URL`, or `HOTDATA_SANDBOX`.
+
+## Connect
+
+```python
+import hotdata_marimo as hm
+
+client = hm.from_env()
 ```
 
-Requires Python 3.10+, **Marimo**, and [**hotdata-runtime**](https://github.com/hotdata-dev/hotdata-runtime) (Hotdata SDK + runtime/session semantics — pulled in automatically when you `pip install hotdata-marimo`).
+If `HOTDATA_WORKSPACE` is unset, pick a workspace interactively:
+
+```python
+ws = hm.workspace_selector_from_env()
+client = ws.client
+```
 
-## Environment
+## SQL editor widget
 
-| Variable | Required | Description |
-|----------|----------|-------------|
-| `HOTDATA_API_KEY` | Yes | API key for the Hotdata API |
-| `HOTDATA_API_URL` | No | API base URL (default: `https://api.hotdata.dev`) |
-| `HOTDATA_WORKSPACE` | No | Workspace id; if unset, the first active workspace is used |
-| `HOTDATA_SANDBOX` | No | Sandbox session id, passed through to the SDK |
+Run SQL in one cell; show results in the next. Marimo only renders what you **`return`**.
 
-## Minimal notebook
+**Cell 1 — editor**
 
 ```python
 import marimo as mo
@@ -41,25 +62,30 @@ editor = hm.sql_editor(client, default_sql="SELECT 1 AS ok")
 return editor.ui
 ```
 
+**Cell 2 — result**
+
 ```python
 return hm.query_result(editor.result)
 ```
 
-Importing `hotdata_marimo` registers discoverability aliases on Marimo’s UI namespace, so you can also use `mo.ui.hotdata_sql_editor`, `mo.ui.hotdata_table_browser`, `mo.ui.hotdata_query_result`, and `mo.ui.hotdata_connection_status`.
+Click **Run on Hotdata** after changing SQL. The editor caches the last successful result so downstream cells do not re-query on every refresh.
 
-Use `hm.connection_status(client)` (or `mo.ui.hotdata_connection_status(client)`) for a small API/workspace health callout.
+## Native Marimo SQL cells
 
-## Marimo SQL Cells
+Register the Hotdata engine once, then pass `engine=client` to `mo.sql`. Hotdata appears as **Hotdata** in the SQL connection picker.
 
-Register the Hotdata SQL engine once during setup, then pass a `HotdataClient` to Marimo SQL cells:
+**Setup cell**
 
 ```python
+import marimo as mo
 import hotdata_marimo as hm
 
 hm.register_hotdata_sql_engine()
 client = hm.from_env()
 ```
 
+**SQL cell**
+
 ```python
 _df = mo.sql(
     """
@@ -69,46 +95,57 @@ _df = mo.sql(
 )
 ```
 
-The engine also exposes Hotdata catalog metadata to Marimo's data-source UI. Hotdata connections are labeled **Hotdata** in the SQL connection picker.
+![Marimo SQL cell with Hotdata selected in the database connections picker](docs/images/mo-sql-hotdata-connection.png)
+
+## Browse tables
+
+```python
+browser = hm.table_browser(client)
+return browser.ui
+```
+
+Pick a connection, schema, and table to inspect columns. Use `browser.selected_table` in downstream cells.
 
-## Two-cell pattern
+## Managed databases
 
-Keep the editor in one cell and consume `editor.result` in another. The editor caches the last successful run so downstream cells do not re-query the API on every refresh; click **Run on Hotdata** again after you change SQL. While a query is running, a Marimo status spinner is shown.
+Create a Hotdata-owned catalog and load a parquet file from the notebook:
 
-Marimo only shows **what you `return` from a cell**. Calling `mo.vstack(...)` or `hm.query_result(...)` without returning it produces no visible output.
+```python
+panel = hm.databases_panel(client)
+return panel
+```
 
-See `examples/demo.py` for a full runnable notebook flow.
+Or use the lower-level writer API:
 
-## Examples
+```python
+writer = hm.managed_database_writer(client)
+return writer.ui
+```
 
-- `examples/demo.py` — tabbed explorer with workspace selection, connection health, recent results (selectable table), run history, and a native `mo.sql` cell.
+## Other helpers
 
-Run locally (single-user machine):
+See [Supported widgets](#supported-widgets) for the full list. Quick examples:
 
-```bash
-uv run marimo edit examples/demo.py --no-token
+```python
+return hm.connection_status(client)
+return hm.connections_panel(client)
+return hm.recent_results(client).ui
+return hm.run_history(client)
 ```
 
-On a **shared or networked host**, omit `--no-token` and use the access token printed in the terminal URL. Without it, anyone who can reach the Marimo port can run queries against your Hotdata workspace.
+## Demo notebook
 
-## Layout
+```bash
+uv run marimo edit examples/demo.py --no-token
+```
 
-This repo is intentionally thin: **API client, env helpers, and result models** live in **hotdata-runtime**; **hotdata-marimo** only adds Marimo widgets (`sql_editor`, `table_browser`, `display` for tables/status/history, `workspace_selector`). Import `HotdataClient` / `QueryResult` / `from_env` from **`hotdata_marimo`** or directly from **`hotdata_runtime`**.
+`examples/demo.py` combines workspace selection, catalog browsing, managed databases, query history, and a native `mo.sql` cell.
 
 ## Development
 
-This package depends on [**hotdata-runtime**](https://github.com/hotdata-dev/hotdata-runtime) (PyPI name `hotdata-runtime`). Development uses **uv**; keep a sibling checkout at `../hotdata-runtime` so the lockfile resolves the runtime from disk (see `[tool.uv.sources]` in `pyproject.toml`).
-
 ```bash
 uv sync --locked
 uv run pytest
-marimo edit examples/demo.py --no-token
 ```
 
-To pin **hotdata-runtime** from Git instead of the sibling path, remove the `[tool.uv.sources]` block, set the dependency line as needed, and run `uv lock` again.
-
-For a **publishable** `uv.lock` (CI that only clones this repo), remove `[tool.uv.sources]`, point `hotdata-runtime` at PyPI or `git+https://…`, then `uv lock`.
-
-The **`[project] name`** in [hotdata-runtime](https://github.com/hotdata-dev/hotdata-runtime) `pyproject.toml` is **`hotdata-runtime`** and the import package is **`hotdata_runtime`**.
-
-Use **`--no-token`** for local development so the editor does not redirect to `/auth/login` (session auth is easy to hit with a global Marimo config). For a public or shared machine, omit it and use the printed URL with an access token instead.
+See [hotdata-runtime](https://github.com/hotdata-dev/hotdata-runtime) for the underlying API client.

examples/demo.py

@@ -1,6 +1,6 @@
 import marimo
 
-__generated_with = "0.23.5"
+__generated_with = "0.23.6"
 app = marimo.App()
 
 
@@ -36,34 +36,43 @@ def _(hm, mo, os):
 def _(hm, workspace):
     client = workspace.client
     status = hm.connections_panel(client)
+    db_writer = hm.managed_database_writer(client)
     recent = hm.recent_results(client, limit=20)
     history = hm.run_history(client, limit=10)
-    return client, history, recent, status
+    return client, db_writer, history, recent, status
 
 
 @app.cell
 def _(mo):
     mo.md(r"""
     ## HotData explorer
-    Use the tabs below to switch between workspaces, connection status, recent results, and run history.
+    Use the tabs below to switch between workspaces, connections, managed databases,
+    recent results, and run history.
 
     On a shared or networked host, run Marimo **without** `--no-token` and open the printed URL
     with its access token so only you can use this notebook.
     """)
     return
 
 
+@app.cell
+def _(db_writer):
+    databases_tab = db_writer.tab_ui
+    return (databases_tab,)
+
+
 @app.cell
 def _(recent):
     recent_tab = recent.tab_ui
     return (recent_tab,)
 
 
 @app.cell
-def _(history, mo, recent_tab, status, workspace):
+def _(databases_tab, history, mo, recent_tab, status, workspace):
     mo.ui.tabs({
         "Workspaces": workspace.ui,
         "Connections": status,
+        "Databases": databases_tab,
         "Recent results": recent_tab,
         "Run history": history,
     })
@@ -73,7 +82,7 @@ def _(history, mo, recent_tab, status, workspace):
 @app.cell
 def _(client, mo):
     _df = mo.sql(
-        """
+        f"""
         SELECT 1 AS example_value
         """,
         engine=client

hotdata_marimo/__init__.py

@@ -9,6 +9,11 @@
 
 from hotdata_runtime import HotdataClient, QueryResult, from_env
 
+from hotdata_marimo.databases import (
+    ManagedDatabaseWriter,
+    databases_panel,
+    managed_database_writer,
+)
 from hotdata_marimo.display import (
     RecentResults,
     connection_status,
@@ -31,20 +36,25 @@
     "HotdataClient",
     "HotdataMarimoEngine",
     "QueryResult",
+    "ManagedDatabaseWriter",
     "RecentResults",
     "SqlEditor",
     "TableBrowser",
     "WorkspaceSelector",
     "connection_picker",
     "connection_status",
     "connections_panel",
+    "databases_panel",
     "from_env",
     "hotdata_connection_picker",
+    "hotdata_databases_panel",
+    "hotdata_managed_database_writer",
     "hotdata_query_result",
     "hotdata_recent_results",
     "hotdata_sql_editor",
     "hotdata_table_browser",
     "hotdata_workspace_selector",
+    "managed_database_writer",
     "query_result",
     "recent_results",
     "register_hotdata_sql_engine",
@@ -60,6 +70,8 @@
 hotdata_table_browser = table_browser
 hotdata_query_result = query_result
 hotdata_connection_picker = connection_picker
+hotdata_databases_panel = databases_panel
+hotdata_managed_database_writer = managed_database_writer
 hotdata_workspace_selector = workspace_selector_from_env
 hotdata_recent_results = recent_results
 
@@ -73,6 +85,8 @@ def register_mo_ui_hotdata_aliases() -> None:
     mo.ui.hotdata_query_result = hotdata_query_result  # type: ignore[attr-defined]
     mo.ui.hotdata_connection_status = connection_status  # type: ignore[attr-defined]
     mo.ui.hotdata_connection_picker = hotdata_connection_picker  # type: ignore[attr-defined]
+    mo.ui.hotdata_databases_panel = hotdata_databases_panel  # type: ignore[attr-defined]
+    mo.ui.hotdata_managed_database_writer = hotdata_managed_database_writer  # type: ignore[attr-defined]
     mo.ui.hotdata_workspace_selector = hotdata_workspace_selector  # type: ignore[attr-defined]
     mo.ui.hotdata_recent_results = hotdata_recent_results  # type: ignore[attr-defined]