After migrate a Continuous Aggregate from the old format to the new
using `cagg_migrate` procedure we end up with the following problems:
* Refresh policy is not copied from the OLD to the NEW cagg;
* Compression setting is not copied from the OLD to the NEW cagg.
Fixed it by properly copying the refresh policy and setting the
`timescaledb.compress=true` flag to the new CAGG.
Fix#4710
Removed the underline character prefix '_' from the parameter names of
the procedure `cagg_migrate`. The new signature is:
cagg_migrate(
IN cagg regclass,
IN override boolean DEFAULT false,
IN drop_old boolean DEFAULT false
)
Timescale 2.7 released a new version of Continuous Aggregate (#4269)
that store the final aggregation state instead of the byte array of
the partial aggregate state, offering multiple opportunities of
optimizations as well a more compact form.
When upgrading to Timescale 2.7, new created Continuous Aggregates
are using the new format, but existing Continuous Aggregates keep
using the format they were defined with.
Created a procedure to upgrade existing Continuous Aggregates from
the old format to the new format, by calling a simple procedure:
test=# CALL cagg_migrate('conditions_summary_daily');
Closes#4424
