fix: Unable to parse escaped tables (#30560)

superset/config.py

@@ -64,6 +64,7 @@
 
 if TYPE_CHECKING:
     from flask_appbuilder.security.sqla import models
+    from sqlglot import Dialect, Dialects
 
     from superset.connectors.sqla.models import SqlaTable
     from superset.models.core import Database
@@ -231,6 +232,10 @@ def _try_json_readsha(filepath: str, length: int) -> str | None:
 SQLALCHEMY_ENCRYPTED_FIELD_TYPE_ADAPTER = (  # pylint: disable=invalid-name
     SQLAlchemyUtilsAdapter
 )
+
+# Extends the default SQLGlot dialects with additional dialects
+SQLGLOT_DIALECTS_EXTENSIONS: map[str, Dialects | type[Dialect]] = {}
+
 # The limit of queries fetched for query search
 QUERY_SEARCH_LIMIT = 1000
 

superset/initialization/__init__.py

@@ -53,6 +53,7 @@
     talisman,
 )
 from superset.security import SupersetSecurityManager
+from superset.sql_parse import SQLGLOT_DIALECTS
 from superset.superset_typing import FlaskResponse
 from superset.tags.core import register_sqla_event_listeners
 from superset.utils.core import is_test, pessimistic_connection_handling
@@ -484,6 +485,7 @@ def init_app(self) -> None:
         self.configure_wtf()
         self.configure_middlewares()
         self.configure_cache()
+        self.configure_sqlglot_dialects()
 
         with self.superset_app.app_context():
             self.init_app_in_ctx()
@@ -521,6 +523,9 @@ def configure_cache(self) -> None:
     def configure_feature_flags(self) -> None:
         feature_flag_manager.init_app(self.superset_app)
 
+    def configure_sqlglot_dialects(self) -> None:
+        SQLGLOT_DIALECTS.update(self.config["SQLGLOT_DIALECTS_EXTENSIONS"])
+
     def configure_fab(self) -> None:
         if self.config["SILENCE_FAB"]:
             logging.getLogger("flask_appbuilder").setLevel(logging.ERROR)