def has_asset_key(self, asset_key: AssetKey) -> bool:
check.inst_param(asset_key, "asset_key", AssetKey)
query = (db.select([
AssetKeyTable.c.asset_key, AssetKeyTable.c.asset_details
]).where(
db.or_(
AssetKeyTable.c.asset_key == asset_key.to_string(),
AssetKeyTable.c.asset_key == asset_key.to_string(legacy=True),
)).limit(1))
with self.index_connection() as conn:
row = conn.execute(query).fetchone()
if not row:
return False
asset_details: Optional[
AssetDetails] = AssetDetails.from_db_string(row[1])
if not asset_details or not asset_details.last_wipe_timestamp:
return True
materialization_row = conn.execute(
db.select([SqlEventLogStorageTable.c.timestamp]).where(
db.or_(
AssetKeyTable.c.asset_key == asset_key.to_string(),
AssetKeyTable.c.asset_key == asset_key.to_string(
legacy=True),
)).order_by(
SqlEventLogStorageTable.c.timestamp.desc()).limit(
1)).fetchone()
if not materialization_row:
return False
return utc_datetime_from_naive(
materialization_row[0]) > utc_datetime_from_timestamp(
asset_details.last_wipe_timestamp)
def all_asset_keys(self):
with self.index_connection() as conn:
results = conn.execute(
db.select([AssetKeyTable.c.asset_key, AssetKeyTable.c.asset_details])
).fetchall()
asset_keys = set()
wiped = set()
wiped_timestamps = {}
for result in results:
asset_key = AssetKey.from_db_string(result[0])
asset_details: Optional[AssetDetails] = AssetDetails.from_db_string(result[1])
asset_keys.add(asset_key)
if asset_details and asset_details.last_wipe_timestamp:
wiped_timestamps[asset_key] = asset_details.last_wipe_timestamp
if wiped_timestamps:
materialized_timestamps = {}
# fetch the last materialization timestamp per asset key
materialization_results = conn.execute(
db.select(
[
SqlEventLogStorageTable.c.asset_key,
db.func.max(SqlEventLogStorageTable.c.timestamp),
]
)
.where(
SqlEventLogStorageTable.c.asset_key.in_(
[asset_key.to_string() for asset_key in wiped_timestamps.keys()]
)
)
.group_by(SqlEventLogStorageTable.c.asset_key)
.order_by(db.func.max(SqlEventLogStorageTable.c.timestamp).asc())
).fetchall()
for result in materialization_results:
asset_key = AssetKey.from_db_string(result[0])
last_materialized_timestamp = result[1]
materialized_timestamps[asset_key] = last_materialized_timestamp
# calculate the set of wiped asset keys that have not had a materialization since
# the wipe timestamp
wiped = set(
[
asset_key
for asset_key in wiped_timestamps.keys()
if not materialized_timestamps.get(asset_key)
or utc_datetime_from_naive(materialized_timestamps.get(asset_key))
< utc_datetime_from_timestamp(wiped_timestamps[asset_key])
]
)
return list(asset_keys.difference(wiped))
def has_asset_key(self, asset_key: AssetKey) -> bool:
check.inst_param(asset_key, "asset_key", AssetKey)
if self.has_secondary_index(ASSET_KEY_INDEX_COLS):
query = (db.select([AssetKeyTable.c.asset_key]).where(
db.or_(
AssetKeyTable.c.asset_key == asset_key.to_string(),
AssetKeyTable.c.asset_key == asset_key.to_string(
legacy=True),
)).where(
db.or_(
AssetKeyTable.c.wipe_timestamp == None,
AssetKeyTable.c.last_materialization_timestamp >
AssetKeyTable.c.wipe_timestamp,
)).limit(1))
with self.index_connection() as conn:
row = conn.execute(query).fetchone()
return bool(row)
# has not migrated, need to pull asset_details to get wipe status
query = (db.select([
AssetKeyTable.c.asset_key, AssetKeyTable.c.asset_details
]).where(
db.or_(
AssetKeyTable.c.asset_key == asset_key.to_string(),
AssetKeyTable.c.asset_key == asset_key.to_string(legacy=True),
)).limit(1))
with self.index_connection() as conn:
row = conn.execute(query).fetchone()
if not row:
return False
asset_details: Optional[
AssetDetails] = AssetDetails.from_db_string(row[1])
if not asset_details or not asset_details.last_wipe_timestamp:
return True
materialization_row = conn.execute(
db.select([SqlEventLogStorageTable.c.timestamp]).where(
db.or_(
AssetKeyTable.c.asset_key == asset_key.to_string(),
AssetKeyTable.c.asset_key == asset_key.to_string(
legacy=True),
)).order_by(
SqlEventLogStorageTable.c.timestamp.desc()).limit(
1)).fetchone()
if not materialization_row:
return False
return utc_datetime_from_naive(
materialization_row[0]) > utc_datetime_from_timestamp(
asset_details.last_wipe_timestamp)
def _fetch_raw_asset_rows(self, asset_keys=None, prefix=None, limit=None, cursor=None):
# fetches rows containing asset_key, last_materialization, and asset_details from the DB,
# applying the filters specified in the arguments. Does not guarantee that the number of
# rows returned will match the limit specified. This helper function is used to fetch a
# chunk of asset key rows, which may or may not be wiped.
#
# Returns a tuple of (rows, has_more, cursor), where each row is a tuple of serialized
# asset_key, materialization, and asset_details
columns = [
AssetKeyTable.c.asset_key,
AssetKeyTable.c.last_materialization,
AssetKeyTable.c.asset_details,
]
is_partial_query = bool(asset_keys) or bool(prefix) or bool(limit) or bool(cursor)
if self.has_asset_key_index_cols() and not is_partial_query:
# if the schema has been migrated, fetch the last_materialization_timestamp to see if
# we can lazily migrate the data table
columns.append(AssetKeyTable.c.last_materialization_timestamp)
columns.append(AssetKeyTable.c.wipe_timestamp)
query = db.select(columns).order_by(AssetKeyTable.c.asset_key.asc())
query = self._apply_asset_filter_to_query(query, asset_keys, prefix, limit, cursor)
if self.has_secondary_index(ASSET_KEY_INDEX_COLS):
query = query.where(
db.or_(
AssetKeyTable.c.wipe_timestamp == None,
AssetKeyTable.c.last_materialization_timestamp > AssetKeyTable.c.wipe_timestamp,
)
)
with self.index_connection() as conn:
rows = conn.execute(query).fetchall()
return rows, False, None
with self.index_connection() as conn:
rows = conn.execute(query).fetchall()
wiped_timestamps_by_asset_key = {}
row_by_asset_key = OrderedDict()
for row in rows:
asset_key = AssetKey.from_db_string(row[0])
if not asset_key:
continue
asset_details = AssetDetails.from_db_string(row[2])
if not asset_details or not asset_details.last_wipe_timestamp:
row_by_asset_key[asset_key] = row
continue
materialization_or_event = (
deserialize_json_to_dagster_namedtuple(row[1]) if row[1] else None
)
if isinstance(materialization_or_event, EventLogEntry):
if asset_details.last_wipe_timestamp > materialization_or_event.timestamp:
# this asset has not been materialized since being wiped, skip
continue
else:
# add the key
row_by_asset_key[asset_key] = row
else:
row_by_asset_key[asset_key] = row
wiped_timestamps_by_asset_key[asset_key] = asset_details.last_wipe_timestamp
if wiped_timestamps_by_asset_key:
materialization_times = self._fetch_backcompat_materialization_times(
wiped_timestamps_by_asset_key.keys()
)
for asset_key, wiped_timestamp in wiped_timestamps_by_asset_key.items():
materialization_time = materialization_times.get(asset_key)
if not materialization_time or utc_datetime_from_naive(
materialization_time
) < utc_datetime_from_timestamp(wiped_timestamp):
# remove rows that have not been materialized since being wiped
row_by_asset_key.pop(asset_key)
has_more = limit and len(rows) == limit
new_cursor = rows[-1][0] if rows else None
return row_by_asset_key.values(), has_more, new_cursor
