upgrade to fork of hasql-pool 0.7.2 (fixes #2401)

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.

test/io/configs/expected/aliases.config

@@ -5,7 +5,6 @@ db-extra-search-path = "public"
 db-max-rows = 1000
 db-plan-enabled = false
 db-pool = 10
-db-pool-timeout = 3600
 db-pre-request = "check_alias"
 db-prepared-statements = true
 db-root-spec = "open_alias"

test/io/configs/expected/boolean-numeric.config

@@ -5,7 +5,6 @@ db-extra-search-path = "public"
 db-max-rows = ""
 db-plan-enabled = false
 db-pool = 10
-db-pool-timeout = 3600
 db-pre-request = ""
 db-prepared-statements = false
 db-root-spec = ""

test/io/configs/expected/boolean-string.config

@@ -5,7 +5,6 @@ db-extra-search-path = "public"
 db-max-rows = ""
 db-plan-enabled = false
 db-pool = 10
-db-pool-timeout = 3600
 db-pre-request = ""
 db-prepared-statements = false
 db-root-spec = ""

test/io/configs/expected/defaults.config

@@ -5,7 +5,6 @@ db-extra-search-path = "public"
 db-max-rows = ""
 db-plan-enabled = false
 db-pool = 10
-db-pool-timeout = 3600
 db-pre-request = ""
 db-prepared-statements = true
 db-root-spec = ""

test/io/configs/expected/no-defaults-with-db-other-authenticator.config

@@ -5,7 +5,6 @@ db-extra-search-path = "public,extensions,other"
 db-max-rows = 100
 db-plan-enabled = true
 db-pool = 1
-db-pool-timeout = 100
 db-pre-request = "test.other_custom_headers"
 db-prepared-statements = false
 db-root-spec = "other_root"

test/io/configs/expected/no-defaults-with-db.config

@@ -5,7 +5,6 @@ db-extra-search-path = "public,extensions,private"
 db-max-rows = 1000
 db-plan-enabled = true
 db-pool = 1
-db-pool-timeout = 100
 db-pre-request = "test.custom_headers"
 db-prepared-statements = false
 db-root-spec = "root"

test/io/configs/expected/no-defaults.config

@@ -5,7 +5,6 @@ db-extra-search-path = "public,test"
 db-max-rows = 1000
 db-plan-enabled = true
 db-pool = 1
-db-pool-timeout = 100
 db-pre-request = "please_run_fast"
 db-prepared-statements = false
 db-root-spec = "openapi_v3"

test/io/configs/expected/types.config

@@ -5,7 +5,6 @@ db-extra-search-path = "public"
 db-max-rows = ""
 db-plan-enabled = false
 db-pool = 10
-db-pool-timeout = 3600
 db-pre-request = ""
 db-prepared-statements = true
 db-root-spec = ""

test/io/configs/no-defaults-env.yaml

@@ -7,7 +7,6 @@ PGRST_DB_EXTRA_SEARCH_PATH: public, test
 PGRST_DB_MAX_ROWS: 1000
 PGRST_DB_PLAN_ENABLED: true
 PGRST_DB_POOL: 1
-PGRST_DB_POOL_TIMEOUT: 100
 PGRST_DB_PREPARED_STATEMENTS: false
 PGRST_DB_PRE_REQUEST: please_run_fast
 PGRST_DB_ROOT_SPEC: openapi_v3

test/io/configs/no-defaults.config

@@ -5,7 +5,6 @@ db-extra-search-path = "public, test"
 db-max-rows = 1000
 db-plan-enabled = true
 db-pool = 1
-db-pool-timeout = 100
 db-pre-request = "please_run_fast"
 db-prepared-statements = false
 db-root-spec = "openapi_v3"

test/io/test_io.py

@@ -123,7 +123,6 @@ def defaultenv(baseenv):
         "PGRST_DB_CONFIG": "true",
         "PGRST_LOG_LEVEL": "info",
         "PGRST_DB_POOL": "1",
-        "PGRST_DB_POOL_TIMEOUT": "1",
     }
 
 
@@ -139,7 +138,6 @@ def metapostgrest():
         "PGRST_DB_CONFIG": "true",
         "PGRST_LOG_LEVEL": "info",
         "PGRST_DB_POOL": "1",
-        "PGRST_DB_POOL_TIMEOUT": "1",
     }
     with run(env=env) as postgrest:
         yield postgrest
@@ -995,7 +993,6 @@ def test_pool_size(defaultenv, metapostgrest):
         assert delta > 1 and delta < 1.5
 
 
-@pytest.mark.xfail(reason="issue #2401")
 def test_change_statement_timeout_held_connection(defaultenv, metapostgrest):
     "Statement timeout changes take effect immediately, even with a request outliving the reconfiguration"
 

test/spec/Main.hs

@@ -64,7 +64,7 @@ import qualified Feature.RpcPreRequestGucsSpec
 
 main :: IO ()
 main = do
-  pool <- P.acquire (3, 10, toUtf8 $ configDbUri testCfg)
+  pool <- P.acquire 3 $ toUtf8 $ configDbUri testCfg
 
   actualPgVersion <- either (panic . show) id <$> P.use pool queryPgVersion
 

test/spec/QueryCost.hs

@@ -24,7 +24,7 @@ import Test.Hspec
 
 main :: IO ()
 main = do
-  pool <- P.acquire (3, 10, "postgresql://")
+  pool <- P.acquire 3 "postgresql://"
 
   hspec $ describe "QueryCost" $
     context "call proc query" $ do

test/spec/SpecHelper.hs

@@ -79,7 +79,6 @@ baseCfg = let secret = Just $ encodeUtf8 "reallyreallyreallyreallyverysafe" in
   , configDbMaxRows             = Nothing
   , configDbPlanEnabled         = False
   , configDbPoolSize            = 10
-  , configDbPoolTimeout         = 10
   , configDbPreRequest          = Just $ QualifiedIdentifier "test" "switch_role"
   , configDbPreparedStatements  = True
   , configDbRootSpec            = Nothing