feat: add Shillelagh DB engine spec (#16416)

setup.py

@@ -133,7 +133,7 @@ setup(
         "exasol": ["sqlalchemy-exasol>=2.1.0, <2.2"],
         "excel": ["xlrd>=1.2.0, <1.3"],
         "firebird": ["sqlalchemy-firebird>=0.7.0, <0.8"],
-        "gsheets": ["shillelagh[gsheetsapi]>=0.7.1, <0.8"],
+        "gsheets": ["shillelagh[gsheetsapi]>=1.0.3, <2"],
         "hana": ["hdbcli==2.4.162", "sqlalchemy_hana==0.4.0"],
         "hive": ["pyhive[hive]>=0.6.1", "tableschema", "thrift>=0.11.0, <1.0.0"],
         "impala": ["impyla>0.16.2, <0.17"],
@@ -148,6 +148,9 @@ setup(
         "prophet": ["prophet>=1.0.1, <1.1", "pystan<3.0"],
         "redshift": ["sqlalchemy-redshift>=0.8.1, < 0.9"],
         "rockset": ["rockset>=0.7.68, <0.8"],
+        "shillelagh": [
+            "shillelagh[datasetteapi,gsheetsapi,socrata,weatherapi]>=1.0.3, <2"
+        ],
         "snowflake": ["snowflake-sqlalchemy>=1.2.3, <1.3"],
         "teradata": ["sqlalchemy-teradata==0.9.0.dev0"],
         "thumbnails": ["Pillow>=7.0.0, <8.0.0"],

superset/db_engine_specs/shillelagh.py

@@ -0,0 +1,26 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+from superset.db_engine_specs.sqlite import SqliteEngineSpec
+
+
+class ShillelaghEngineSpec(SqliteEngineSpec):
+    """Engine for shillelagh"""
+
+    engine = "shillelagh"
+    engine_name = "Shillelagh"
+    allows_joins = True
+    allows_subqueries = True