The now time is stamped by the influxql transpiler and used inside of
the actual query. It will result in more accuracy if we take the
timestamp we have created and send it as part of the spec to queryd
rather than force ourselves to ensure absolute times exist everywhere.
The transpiler compilation tests will now not allow skip to be
specified. Instead, it must return an error message that starts with
`unimplemented` and then the reason will be used as the skip message.
This way, it will be easier to identify the failing tests in the
transpiler. In the previous method, it was possible for a test to be
marked as skip, but for the transpiler to return the wrong error message
because the test did not differentiate between an unimplemented error
message and an incorrect error message.
The transpiler now supports basic windowing. The window offsets are not
supported yet at all.
For windowing, we use the window function to split the points, perform
the aggregate/selector operation, and then we put them back into the
same window so they are within the same table as they originally were
located in. This is now reflected in the spec and the code.
The transpiler should use a bucket for the `from()` call instead of the
database parameter which will likely be deprecated. The bucket that it
will read data from is `db/rp` and, if the retention policy isn't
specified, `autogen` will be used as the default.
There are a few changes to how the transpiler works. The first is that
the streams are now abstracted behind a `cursor` interface. The
interface keeps track of which AST nodes (like variables or function
calls) are represented by the data inside of the stream and the method
of how to access the underlying data. This makes it easier to make a
generic interface for things like the join and map operations. This also
makes it easier to, in the future, use the same code from the map
operation for a filter so we can implement conditions.
This also follows the transpiler readme's methods and takes advantage of
the updates to the ifql language. This means it will group the relevant
cursors into a cursor group, perform any necessary joins, and allow us
to continue building on this as we flesh out more parts of the
transpiler and the language.
The cursor interface makes it so we no longer have to keep a symbol
table mapping the generated names to the locations because that is all
kept within the incoming cursor rather than as a separate data
structure.
It also splits the transpiler into more files so it is easier to find
the relevant code for each stage of the transpiler.
This fixes the encoder so that it will encode the response correctly to
a JSON blob using the outputs of the transpiler. The transpiler has also
been modified to pass through the correct values so the map function is
correctly constructed and the aggregate function is also correctly
constructed.
This removes the group function temporarily because it does not seem to
be working.
The transpiler will now yield each statement using the statement id so
the result encoder can properly order the results and encode the
statement id. This behavior is now in the transpiler spec.
Jonathan A. Sternberg
Nathaniel Cook
Adam