fix(sql): Add Impala dialect support to sqlglot parser (#34662)

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Joe Li <joe@preset.io>

tests/unit_tests/sql/test_impala_dialect.py

@@ -0,0 +1,28 @@
+# 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.
+
+"""Tests for Impala dialect support in sqlglot."""
+
+from sqlglot import Dialects
+
+from superset.sql.parse import SQLGLOT_DIALECTS
+
+
+def test_impala_dialect_mapped() -> None:
+    """Test that Impala is correctly mapped to Hive dialect."""
+    assert "impala" in SQLGLOT_DIALECTS
+    assert SQLGLOT_DIALECTS["impala"] == Dialects.HIVE