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A number of environment variables can be used to configure the behavior of the library. There are also functions to configure this behavior in code. The environment variables are convenient when troubleshooting problems.
Endpoint OverridesGOOGLE_CLOUD_CPP_ANALYTICS_HUB_SERVICE_ENDPOINT=...
overrides the EndpointOption
(which defaults to "analyticshub.googleapis.com") used by MakeAnalyticsHubServiceConnection()
.GOOGLE_CLOUD_CPP_BIGQUERY_CONNECTION_SERVICE_ENDPOINT=...
overrides the EndpointOption
(which defaults to "bigqueryconnection.googleapis.com") used by MakeConnection()
.GOOGLE_CLOUD_CPP_BIGQUERY_READ_ENDPOINT=...
overrides the EndpointOption
(which defaults to "bigquerystorage.googleapis.com") used by MakeBigQueryReadConnection()
.GOOGLE_CLOUD_CPP_BIGQUERY_WRITE_ENDPOINT=...
overrides the EndpointOption
(which defaults to "bigquerystorage.googleapis.com") used by MakeBigQueryWriteConnection()
.GOOGLE_CLOUD_CPP_DATA_POLICY_SERVICE_ENDPOINT=...
overrides the EndpointOption
(which defaults to "bigquerydatapolicy.googleapis.com") used by MakeDataPolicyServiceConnection()
.GOOGLE_CLOUD_CPP_DATA_TRANSFER_SERVICE_ENDPOINT=...
overrides the EndpointOption
(which defaults to "bigquerydatatransfer.googleapis.com") used by MakeDataTransferServiceConnection()
.GOOGLE_CLOUD_CPP_METASTORE_SERVICE_ENDPOINT=...
overrides the EndpointOption
(which defaults to "biglake.googleapis.com") used by MakeMetastoreServiceConnection()
.GOOGLE_CLOUD_CPP_MIGRATION_SERVICE_ENDPOINT=...
overrides the EndpointOption
(which defaults to "bigquerymigration.googleapis.com") used by MakeMigrationServiceConnection()
.GOOGLE_CLOUD_CPP_RESERVATION_SERVICE_ENDPOINT=...
overrides the EndpointOption
(which defaults to "bigqueryreservation.googleapis.com") used by MakeReservationServiceConnection()
.GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc
: turns on tracing for most gRPC calls. The library injects an additional Stub decorator that prints each gRPC request and response. Unless you have configured your own logging backend, you should also set GOOGLE_CLOUD_CPP_ENABLE_CLOG
to produce any output on the program's console.
google::cloud::TracingComponentsOption
GOOGLE_CLOUD_CPP_TRACING_OPTIONS=...
: modifies the behavior of gRPC tracing, including whether messages will be output on multiple lines, or whether string/bytes fields will be truncated.
google::cloud::GrpcTracingOptionsOption
GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes
: turns on logging in the library, basically the library always "logs" but the logging infrastructure has no backend to actually print anything until the application sets a backend or they set this environment variable.
GOOGLE_CLOUD_PROJECT=...
: is used in examples and integration tests to configure the GCP project. This has no effect in the library.
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-08-14 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["This document details environment variables and configuration options for the Google Cloud C++ client library related to BigQuery, covering versions from 2.11.0 to 2.37.0-rc, with version 2.37.0-rc being the latest."],["Several environment variables allow overriding default service endpoints, such as `GOOGLE_CLOUD_CPP_ANALYTICS_HUB_SERVICE_ENDPOINT` for Analytics Hub and `GOOGLE_CLOUD_CPP_BIGQUERY_CONNECTION_SERVICE_ENDPOINT` for BigQuery connections."],["Tracing and logging in the library can be enabled and configured via environment variables like `GOOGLE_CLOUD_CPP_ENABLE_TRACING` for gRPC calls and `GOOGLE_CLOUD_CPP_ENABLE_CLOG` to activate the logging infrastructure's output."],["The `GOOGLE_CLOUD_CPP_TRACING_OPTIONS` environment variable can be utilized to customize the behavior of gRPC tracing, such as output format and truncation of data."],["While `GOOGLE_CLOUD_PROJECT` is used in examples and tests to specify the GCP project, it does not directly affect the library's behavior itself."]]],[]]
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