tree e37cbd2f8273e7d683bd1f7a3d8f6d944a7a5e8b
parent c133759b481acf66d3caf06de9140ac7062d017f
author Quentin Smith <quentin@golang.org> 1486150054 -0500
committer Quentin Smith <quentin@golang.org> 1486671346 +0000

storage: optimize queries for label presence

The query term "key>" can be used to search for records that have any
value for the key. This optimizes the query with a separate SQL
expression and adds tests for this behavior.

Change-Id: I5e2734734e0911a3ed12c87e7ada776ad309a90d
Reviewed-on: https://go-review.googlesource.com/36590
Reviewed-by: Russ Cox <rsc@golang.org>