Postgres: Switch the datasource plugin from lib/pq to pgx (#108443)

* Postgres: Switch the datasource plugin from lib/pq to pgx

* Fix lint

pkg/services/featuremgmt/registry.go

@@ -1655,6 +1655,12 @@ var (
 			Owner:        grafanaObservabilityTracesAndProfilingSquad,
 			FrontendOnly: true,
 		},
+		{
+			Name:        "postgresDSUsePGX",
+			Description: "Enables using PGX instead of libpq for PostgreSQL datasource",
+			Stage:       FeatureStageExperimental,
+			Owner:       grafanaOSSBigTent,
+		},
 		{
 			Name:         "tempoAlerting",
 			Description:  "Enables creating alerts from Tempo data source",

pkg/services/featuremgmt/toggles_gen.csv

@@ -215,6 +215,7 @@ localizationForPlugins,experimental,@grafana/plugins-platform-backend,false,fals
 unifiedNavbars,GA,@grafana/plugins-platform-backend,false,false,true
 logsPanelControls,preview,@grafana/observability-logs,false,false,true
 metricsFromProfiles,experimental,@grafana/observability-traces-and-profiling,false,false,true
+postgresDSUsePGX,experimental,@grafana/oss-big-tent,false,false,false
 tempoAlerting,experimental,@grafana/observability-traces-and-profiling,false,false,true
 pluginsAutoUpdate,experimental,@grafana/plugins-platform-backend,false,false,false
 multiTenantFrontend,experimental,@grafana/grafana-frontend-platform,false,false,false

pkg/services/featuremgmt/toggles_gen.go

@@ -871,6 +871,10 @@ const (
 	// Enables creating metrics from profiles and storing them as recording rules
 	FlagMetricsFromProfiles = "metricsFromProfiles"
 
+	// FlagPostgresDSUsePGX
+	// Enables using PGX instead of libpq for PostgreSQL datasource
+	FlagPostgresDSUsePGX = "postgresDSUsePGX"
+
 	// FlagTempoAlerting
 	// Enables creating alerts from Tempo data source
 	FlagTempoAlerting = "tempoAlerting"

pkg/services/featuremgmt/toggles_gen.json

@@ -2413,6 +2413,19 @@
         "expression": "false"
       }
     },
+    {
+      "metadata": {
+        "name": "postgresDSUsePGX",
+        "resourceVersion": "1753174666056",
+        "creationTimestamp": "2025-05-26T06:54:18Z",
+        "deletionTimestamp": "2025-06-03T12:45:07Z"
+      },
+      "spec": {
+        "description": "Enables using PGX instead of libpq for PostgreSQL datasource",
+        "stage": "experimental",
+        "codeowner": "@grafana/oss-big-tent"
+      }
+    },
     {
       "metadata": {
         "name": "preferLibraryPanelTitle",

pkg/services/pluginsintegration/plugintest/plugins_test.go

@@ -163,7 +163,7 @@ func TestIntegrationPluginManager(t *testing.T) {
 	pr := prometheus.ProvideService(hcp)
 	tmpo := tempo.ProvideService(hcp)
 	td := testdatasource.ProvideService()
-	pg := postgres.ProvideService(cfg)
+	pg := postgres.ProvideService(cfg, features)
 	my := mysql.ProvideService()
 	ms := mssql.ProvideService(cfg)
 	db := db.InitTestDB(t, sqlstore.InitTestDBOpt{Cfg: cfg})