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fix(dataset): create ES-View dataset raise exception #16623 #16624

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merged 6 commits into from
Sep 14, 2021
Merged

fix(dataset): create ES-View dataset raise exception #16623 #16624

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7f40cb3
fix(dataset): create es-view dataset raise exception #16623
aniaan Sep 7, 2021
b594531
fix(database): fix has_view logic
aniaan Sep 8, 2021
41b7c9e
refactor(database): fix logic
aniaan Sep 9, 2021
f8f3169
style(lint): remove unused typing
aniaan Sep 9, 2021
8945f5e
fix(test): add test case
aniaan Sep 13, 2021
ea948de
fix(test): fix test case
aniaan Sep 14, 2021
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6 changes: 5 additions & 1 deletion superset/connectors/sqla/utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -43,7 +43,11 @@ def get_physical_table_metadata(
# ensure empty schema
_schema_name = schema_name if schema_name else None
# Table does not exist or is not visible to a connection.
if not database.has_table_by_name(table_name, schema=_schema_name):

if not (
database.has_table_by_name(table_name=table_name, schema=_schema_name)
or database.has_view_by_name(view_name=table_name, schema=_schema_name)
):
raise NoSuchTableError

cols = database.get_columns(table_name, schema=_schema_name)
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24 changes: 23 additions & 1 deletion superset/models/core.py
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Original file line number Diff line number Diff line change
Expand Up @@ -44,7 +44,7 @@
Table,
Text,
)
from sqlalchemy.engine import Dialect, Engine, url
from sqlalchemy.engine import Connection, Dialect, Engine, url
from sqlalchemy.engine.reflection import Inspector
from sqlalchemy.engine.url import make_url, URL
from sqlalchemy.exc import ArgumentError
Expand Down Expand Up @@ -721,6 +721,28 @@ def has_table_by_name(self, table_name: str, schema: Optional[str] = None) -> bo
engine = self.get_sqla_engine()
return engine.has_table(table_name, schema)

@classmethod
def _has_view(
cls,
conn: Connection,
dialect: Dialect,
view_name: str,
schema: Optional[str] = None,
) -> bool:
view_names: List[str] = []
try:
view_names = dialect.get_view_names(connection=conn, schema=schema)
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@dpgaspar dpgaspar Sep 9, 2021 •
edited
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bugs me that we were only checking for has_table since this should just check for tables, the base dialect class on SQLAlchemy:

    def has_table(self, connection, table_name, schema=None):
        """Check the existence of a particular table in the database.

        Given a :class:`.Connection` object and a string
        `table_name`, return True if the given table (possibly within
        the specified `schema`) exists in the database, False
        otherwise.
        """

        raise NotImplementedError()

So this seems like a valid solution to me, kind of surprises me that this not happen on other engines.
@villebro @betodealmeida what do you think?

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I tried to add test cases. Please review. The problem is essentially that there is no judgment on the view, but I found the problem when I happened to use ES, so I think the test case should be judged for the general view. Not just ES

except Exception as ex: # pylint: disable=broad-except
logger.warning(ex)
return view_name in view_names

def has_view(self, view_name: str, schema: Optional[str] = None) -> bool:
engine = self.get_sqla_engine()
return engine.run_callable(self._has_view, engine.dialect, view_name, schema)

def has_view_by_name(self, view_name: str, schema: Optional[str] = None) -> bool:
return self.has_view(view_name=view_name, schema=schema)

@memoized
def get_dialect(self) -> Dialect:
sqla_url = url.make_url(self.sqlalchemy_uri_decrypted)
Expand Down