If users properly call client.Close(), then this will make sure that
established tcp connections dont continually grow when creating new http
clients.
This fixes the case where users are creating new http clients on top of
existing _valid_ connections.
This was encountered in Telegraf when we were recreating our http
clients after getting write failures that were unrelated to the actual
connection being severed (such as typos in the retention policy, see
https://github.com/influxdata/telegraf/issues/1058)
The series keys within a tag set were previously not sorted which would
cause the output to be non-deterministic. This sorts the output series
by their keys so it has a consistent output especially when using
limits.
Fixes#3166.
This also switches the remaining iterators to be lazy so they can return
errors properly. They needed to be converted to lazy initialization
anyway, which has the side effect of making it much easier for us to
propagate the underlying error during initialization.
Updated the Emitter to return errors when it cannot read properly from
the iterators.
The optional sections of the command consumed the semicolon token and
didn't put it back for the outer loop. The code shouldn't explicitly
check for a semicolon or EOF anyway, so these checks were removed and
the token gets unscanned if it doesn't match the optional token that the
parser is looking for.
Fixes#6398.
When a GROUP BY or multiple sources are used, the top level limit
iterator requires reading the entire iterator stream so it can find all
of the tag groups it needs to return. For large data series, this ends
up with the limit iterator discarding a lot of output.
This change adds a new lower level limit iterator on each series itself
so that there are fewer data points that have to be thrown away by the
top level iterator.
Fixes#5553.
For aggregate queries, derivatives will now alter the start time to one
interval behind and will use that interval to find the derivative of the
first point instead of giving no value for that interval. Null values
will still be discarded so if the interval before the one you are
querying is null, then it will be discarded like if it were in the
middle of the query. You can use `fill(0)` to fill in these values.
This does not apply to raw queries yet.
Also modified the derivative and difference aggregates to use the stream
iterator instead of the reduce slice iterator for space efficiency.
Fixes#3247. Contributes to #5943.
The deprecated message is now attached to a new attribute returned with
the results. This message can then be read by clients to warn a user
about upcoming changes to the query engine.
The `influx` client has already been modified to read this message and
print it out for every format except CSV.
The first warning message is a deprecated message about removing `IF NOT
EXISTS` from `CREATE DATABASE`.
The message will also be printed to the server log.
Fixes#5707.
Jonathan A. Sternberg
thbourlove
Jason Wilder
Jonathan A. Sternberg
Ben Johnson
Seif Lotfy
Jason Wilder
Nathaniel Cook
Cameron Sparr
Nathaniel Cook
David Norton
Aaron Knister
Gunnar
gunnaraasen