api.py

# Copyright (c) 2017 The PyBigQuery Authors
#
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# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to
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# the Software, and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
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# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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"""Integration with BigQuery API."""

from __future__ import absolute_import
from __future__ import unicode_literals

from google.cloud.bigquery import QueryJobConfig

from pybigquery import _helpers


class ApiClient(object):
    def __init__(self, credentials_path=None, location=None):
        self.credentials_path = credentials_path
        self.location = location
        self.client = _helpers.create_bigquery_client(
            credentials_path=credentials_path, location=location
        )

    def dry_run_query(self, query):
        job_config = QueryJobConfig()
        job_config.dry_run = True
        job_config.use_query_cache = False
        return self.client.query(query=(query), job_config=job_config)