[#12129] feat(mcp-server): add read tools for views#12130
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What changes were proposed in this pull request?
Add two read-only MCP tools for views:
list_of_views(catalog, schema)— lists the views in a schema.load_view(catalog, schema, view)— returns the full metadata of a view(columns, SQL representations, default catalog/schema, properties, audit).
They follow the existing metadata-type pattern (interface → plain REST client →
FastMCP tool → mock + unit tests). All user-supplied path segments are
URL-encoded, and authorization is enforced by Gravitino, so no filtering logic is
added in the MCP layer.
Why are the changes needed?
Views round out read coverage for relational catalogs. Unlike partitions
(Hive-only), views are supported by both the Hive and the
lakehouse-icebergcatalogs (
IcebergCatalog.asViewCatalog()), so this is useful for Icebergdeployments too.
Fix: #12129
Does this PR introduce any user-facing change?
Yes — two new MCP tools (
list_of_views,load_view), taggedview.How was this patch tested?
Added unit tests for the tools (
test_view.py) and for URL-encoding of the viewendpoints (
test_url_encoding.py). Full unit suite passes (161 tests);blackand
pylint(10/10) are clean.