Python BigQuery客户端缓存不起作用

Question

It seems like the caching for the Python bigquery library does not work. The example below always prints None . How can I fix this issue?

from google.cloud import bigquery
query = """
SELECT *
FROM (SELECT 1)
"""
job_config = bigquery.QueryJobConfig()
job_config.use_query_cache = True
results = bq_client.query(query, job_config=job_config)
print(results.cache_hit)

Answer 1

Turns out you gotta do something with the results object first. For example results.to_dataframe() .

Thx to VictorGGI and William Funks: "cache_hit" will return "None if job is not yet complete" ( cache_hit ). You would need to run "done" ( done ) to verify job is completed, or any other method which verified this