Previously, refresh_lag in continuous aggs was calculated
relative to the maximum timestamp in the table. Change the
semantics so that it is relative to now(). This is more
intuitive.
Requires an integer_now function applied to hypertables
with integer-based time dimensions.
When explicit JOIN syntax is used the from list will contain a
JoinExpr instead of a list of RangeTblRef which was not detected
properly by cagg_validate_query. This patch adds a check for
RangeTblRef to the validation code.
Add indexes for materialization table created by continuous aggregates.
This behavior can be turned on/off by using timescaledb.create_group_indexes parameter
of the WITH clause when the continuous agg is created.
Tests include:
1. UPDATEs get logged to the invalidation log.
2. the invalidation log is not written to on ABORT.
3. custom time-partitioning functions are not supported
(also updates error message for this case).
