- new option db-pool-max-idletime limits the maximal idle time of a
postgresql connection, defaults to 30 seconds
- this essentially restores the db-pool-timeout option from versions
<=10, with more specific name
- db-pool-acquisition-timeout is no longer optional, defaults to 10s
- new option db-pool-max-lifetime limits the maximal lifetime of a
postgresql connection, defaults to 30m
The configuration option db-pool-acquisition-timeout
specifies the time in seconds to wait for the pool to
free up a connection slot. Otherwise, a 504 error is
returned. By default, there is no timeout.
- hasql-pool-0.8
* 'release' now flushes the pool, and no longer destroys it;
'PoolIsReleasedUsageError' is gone compared to our fork
* now supports an acquisition timeout, which we don't use
yet
* lower bound on 0.8.0.2 to fix a Windows build issue
- hasql-1.6
introduces a position parameter to ServerError, which we
ignore
This version of hasql-pool is a simplified rewrite that doesn't use
the resource-pool package. The major API changes are that idle
connections are no longer timed out (and the corresponding setting
is gone), and that `release` makes the pool unusable, where it used
to remain usable and only flushed idle connections.
We depend on a PostgREST fork of 0.7.2 that gives us reliable
flushing, compare https://github.com/PostgREST/hasql-pool/pull/1
- hasql-pool 0.7 removes timing out of idle connections, so
this change removes the db-pool-timeout option.
Given that we were typically running with very high
timeout settings, I don't anticipate the lack of timeout
to introduce new issues, though we might want to consider
introducing some retry-logic down the line when we
encounter connection failures.
- See https://github.com/PostgREST/postgrest/issues/2422 for a
discussion on depending on a forked dependency. Besides adding
the dependency to the nix overlay, we're also adding it to
stack.yaml and a new cabal.project to allow stack/cabal users
to build the project.
This changes behaviour somewhat in that:
- We now consistently release the pool on shutdown, even on non-Unix
platforms, and including for CmdDumpConfig.
- We release the pool *after* interrupting `App.run`, which will
rather cause more than fewer connection to be closed properly.
(Previously any in-use connections would not have been caught by
`releasePool`, though *maybe* the `UserInterrupt` handling in
the web handler ends up closing the connections properly already
anyway).
(The main aim of the change is to make it clearer when and why the
pool is released.)
Previously, it was quite possible to have two connection workers
running, or to get into a state where a failed connection worker
is still considered running preventing new connection workers
from starting.
The request.spec GUC contains the schema cache structure in json.
It's only available when the root endpoint(/) is requested and when
db-root-spec is not empty.
Also correct db-root-spec to accept a schema.
Now that PgVersion is not part of DbStructure, Config is a more apt
module for it.
Also rename getDbStructure to queryDbStructure. AppState also had a
getDbStructure function for a record field.
