Change distinct so it uses a custom reducer that keeps internal state
instead of requiring all of the points to be kept as a slice in memory.
Fixes#6261.
Now it is possible to compare tags and fields and it is also now
possible to compare tags and tags. Previously, it was only possible to
compare fields with fields and tags with a string or a regex.
Fixes#3371.
This commit makes a number of performance improvements to
reduce allocations during query execution. Several objects
and buffers are now reused across the components to avoid
allocations.
Previously a simple `count(value)` query across 1M points
would require 26,000+ allocations. After the changes in
this commit that number has been reduced to 88.
A missing tag on a point was sometimes treated as `""` and sometimes
treated as a separate `null` entity. This change modifies the equality
operations to always treat a missing tag as an empty string.
Empty tags are *not* indexed and do not have the same performance as a
tag that exists.
Fixes#3773.
If a point had no tags at all and was asked for the subset of tags with
at least one key, it would return a new set of tags that was completely
empty. In contrast, if the point had any tags at all, it would return a
set of tags with the tag value being an empty string. This lead to
a point with no tags being treated differently than a point with at
least one tag.
Fixing this so the tag value will always be an empty string for
consistency. A missing tag should always be empty.
If a non-existant shard was requested as part of the iterator,
the influxd server would panic. Now it handles this situation by
skipping the offending shard and returning properly when none could be
found.
The following query was fixed previously:
SELECT 'value' FROM cpu
This ended up hitting the `buildExprIterator()` code path and was
handled properly. But this query:
SELECT 'value', value FROM cpu
This took a different code path that would trigger a panic because it
triggered a panic instead of an error condition. This code path has now
been modified to trigger an error instead of a panic.
Fixes#6248.
Influxdb uses gdm for the dependency management. For gdm to work on Windows, it needs go 1.6. Influx still uses go 1.4.3. So go 1.6 will be sed for the pre-build stages, and go 1.4.3 to run the tests.
This arrangements is working in AppVeyor now.
Jonathan A. Sternberg
Jonathan A. Sternberg
Edd Robinson
Chris Ramón
Todd Persen
Gunnar
Nathaniel Cook
Nathaniel Cook
Ben Johnson
Pierre Fersing
Valeriy Simonov
gunnaraasen
Cameron Sparr
Jack Zampolin
Cory LaNou
mvadu
aviau