commit | 44c8a0f5156371578697260478cf022f9f2a6067 | [log] [tgz] |
---|---|---|
author | shollyman <shollyman@google.com> | Tue Jun 30 13:46:03 2020 -0700 |
committer | GitHub <noreply@github.com> | Tue Jun 30 20:46:03 2020 +0000 |
tree | e81df5c145f42280929db2785526c9979db7ab7a | |
parent | 77c0c6da3e7053355ba697b6bdebd8559f91673a [diff] |
bigquery: refactor RowIterator to support fast query path (#2484) This CL significantly revamps the rowiterator. Previously, row iteration necessitated a reference to a Table object. For jobs, this meant we would consult job statistics to find the reference to the destination table. With this change, we switch to using the jobs.getQueryResults RPC to get rows from a job, while still allowing table reads to use the existing tabledata.list mechanism. This change also includes support for a caching abstraction in the row iterator, which is added but not yet leveraged. This will be wired up in subsequent PRs that change the query execution path. Additionally, this PR address some other reported issues against the library as the use of jobs.getQueryResults allows the service to make decisions about the source of results (e.g. in cases where a scripting/multistatement query returns resultsets from a child job). Fixes: #1960, #1974
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