tree 8ac5b8d6471c2e1acf8b23f4584495a872916701
parent 3f0673e901db30b9cd95f0759cdd26eee9752a16
author Jonathan Amsterdam <jba@google.com> 1616628080 -0400
committer Jonathan Amsterdam <jba@google.com> 1616670123 +0000

internal/database: wrap OpenCensus sql driver

The datbase/sql package provides a way to get at the underlying driver's
connection. We will need that feature to access pgx's fast CopyFrom
method.

Unfortunately, we do not use the pgx driver directly. Instead, we wrap
it in an OpenCensus driver for tracing and metrics. And that
OpenCensus driver's connection does not allow us to dig into _it_ to
retrieve the pgx connection that it wraps.

Hence this dance: we must write our own driver and connection
implementations.  The driver return the connection, and the connection
holds both the underlying (pgx) connection and the OpenCensus
connection, to which it delegates.

This CL is a no-op; everything behaves as before. But it lays the
groundwork for a subsequent CL that will use pgx's CopyFrom.

Change-Id: I5bf308aa23f07f20d1f6410ebb04cd6b9a5e0922
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/304630
Trust: Jonathan Amsterdam <jba@google.com>
Run-TryBot: Jonathan Amsterdam <jba@google.com>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Julie Qiu <julie@golang.org>