chamikaramj commented on a change in pull request #11244: [BEAM-3097]
_ReadFromBigQuery supports valueprovider for table
URL: https://github.com/apache/beam/pull/11244#discussion_r402668065
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File path: sdks/python/apache_beam/io/gcp/bigquery.py
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@@ -641,12 +641,19 @@ def __init__(
def estimate_size(self):
bq = bigquery_tools.BigQueryWrapper()
if self.table_reference is not None:
+ table_ref = self.table_reference
+ if (isinstance(self.table_reference, vp.ValueProvider) and
+ self.table_reference.is_accessible()):
+ table_ref = bigquery_tools.parse_table_reference(
+ self.table_reference.get(), self.dataset, self.project)
+ elif isinstance(self.table_reference, vp.ValueProvider):
+ # Size estimation is best effort. We return 0 as we have no
+ # access to the table that we're querying.
+ return 0
table = bq.get_table(
- self.table_reference.projectId,
- self.table_reference.datasetId,
- self.table_reference.tableId)
+ table_ref.projectId, table_ref.datasetId, table_ref.tableId)
return int(table.numBytes)
- else:
+ elif self.query is not None and self.query.is_accessible():
job = bq._start_query_job(
Review comment:
Not from this PR but shouldn't this be a dry run ?
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