fix(owlgen): warn on single-child covering axiom equivalence

docs/generators/bigquery.rst

@@ -0,0 +1,59 @@
+BigQuery DDL
+============
+
+Overview
+--------
+
+The BigQuery DDL generator produces native `Google BigQuery <https://cloud.google.com/bigquery>`_
+``CREATE TABLE`` statements from a LinkML schema. It extends the SQL DDL generator with
+BigQuery-specific types (``ARRAY<T>``, ``STRUCT<...>``, ``TIMESTAMP``) and supports
+BigQuery table options such as time/range partitioning, clustering, and table descriptions
+via LinkML annotations.
+
+.. note::
+
+   This generator requires the ``sqlalchemy-bigquery`` optional dependency.
+   Install it with: ``pip install 'linkml[bigquery]'``
+
+Example Output
+--------------
+
+Given a schema with a ``Person`` class, the generator produces DDL like:
+
+.. code-block:: sql
+
+   CREATE TABLE `Person` (
+     id STRING NOT NULL,
+     name STRING,
+     age INT64,
+     aliases ARRAY<STRING>
+   );
+
+BigQuery Annotations
+--------------------
+
+You can control BigQuery-specific table options via slot/class annotations:
+
+- ``bigquery_type`` — override the column type (e.g. ``TIMESTAMP``)
+- ``bigquery_partition_by`` — field name to use for time/range partitioning
+- ``bigquery_partition_type`` — ``DAY``, ``HOUR``, ``MONTH``, ``YEAR``, or ``RANGE``
+- ``bigquery_cluster_by`` — comma-separated field names for clustering
+- ``bigquery_description`` — table-level description string
+
+Docs
+----
+
+Command Line
+^^^^^^^^^^^^
+
+.. currentmodule:: linkml.generators.bigquerygen
+
+.. click:: linkml.generators.bigquerygen:cli
+    :prog: gen-bigquery
+    :nested: short
+
+Code
+^^^^
+
+.. autoclass:: BigQueryGenerator
+    :members: serialize, generate_ddl

docs/generators/index.rst

@@ -93,6 +93,7 @@ Generators specific to database frameworks, including SQL and graph databases.
    sqltable
    sqlalchemy
    sqlvalidation
+   bigquery
    typedb
 
 Others

packages/linkml/pyproject.toml

@@ -10,7 +10,7 @@ authors = [
   {name = "Sierra Moxon", email = "smoxon@lbl.gov"},
   {name = "Harold Solbrig", email = "solbrig@jhu.edu"},
   {name = "Sujay Patil", email = "spatil@lbl.gov"},
-  {name = "Harshad Hegde", email = "hhegde@lbl.gov"},
+  {name = "Harshad Hegde", email = "hegdehb@gmail.com"},
   {name = "Mark Andrew Miller", email = "MAM@lbl.gov"},
   {name = "Deepak Unni"},
   {name = "Gaurav Vaidya", email = "gaurav@renci.org"},
@@ -80,6 +80,7 @@ tests = [
   { include-group = "typing" },
   { include-group = "shacl" },
   "duckdb>=1.5.2",
+  "sqlalchemy-bigquery >= 1.9.0",
 ]
 dev = [
   {include-group = "tests" },
@@ -111,6 +112,9 @@ tests-rustgen = [
 typedb = [
   "typedb-driver >= 3.0, < 4.0",
 ]
+bigquery = [
+  "sqlalchemy-bigquery >= 1.9.0",
+]
 
 tests-extra = [
   "pytest >= 7.4.0",
@@ -178,6 +182,7 @@ gen-sqla = "linkml.generators.sqlalchemygen:cli"
 gen-sqlddl = "linkml.generators.sqltablegen:cli"
 gen-sqltables = "linkml.generators.sqltablegen:cli"
 gen-sqlvalidation = "linkml.generators.sqlvalidationgen:cli"
+gen-bigquery = "linkml.generators.bigquerygen:cli"
 gen-summary = "linkml.generators.summarygen:cli"
 gen-project = "linkml.generators.projectgen:cli"
 run-tutorial = "linkml.utils.execute_tutorial:cli"