chore: add db schema with sqlc config

This commit adds the DB schema and the needed
sqlc config to generate the code needed to
interact with this schema.

Change-Id: b8cc15ee3f847ddbe7f2224a1bd03036
Relates-To: prometheus#4315

Author: OGKevin

.gitignore

@@ -19,5 +19,6 @@
 !/circle.yml
 !/.travis.yml
 !/.promu.yml
+!/sqlc.yaml
 !/api/v2/openapi.yaml
 !.github/workflows/*.yml

analytics/internal/db.go

@@ -0,0 +1,3 @@
+-- name: PlaceHolder :exec
+select
+  1;

analytics/internal/models.go

@@ -0,0 +1,57 @@
+CREATE TYPE "alert_states" AS ENUM (
+  'unprocessed',
+  'active',
+  'firing',
+  'suppressed',
+  'deleted'
+);
+
+CREATE TYPE "suppressed_reason" AS ENUM ('silenced', 'inhibited');
+
+CREATE TABLE "alerts" (
+  "id" UUID PRIMARY KEY,
+  "created_at" timestamp DEFAULT (now ()) NOT NUll,
+  "fingerprint" string UNIQUE NOT NUll,
+  "alertname" string NOT NUll
+);
+
+CREATE TABLE "alert_states" (
+  "id" UUID PRIMARY KEY,
+  "created_at" timestamp DEFAULT (now ()) NOT NUll,
+  "alert" STRING REFERENCES alerts (fingerprint) NOT NUll,
+  "state" alert_states NOT NUll,
+  "suppressed_by" string REFERENCES alerts (fingerprint),
+  "suppressed_reason" suppressed_reason
+);
+
+CREATE TABLE "labels" (
+  "id" UUID PRIMARY KEY,
+  "key" string NOT NUll,
+  "value" string NOT NUll
+);
+
+CREATE TABLE "annotations" (
+  "id" UUID PRIMARY KEY,
+  "key" string NOT NUll,
+  "value" string NOT NUll
+);
+
+CREATE TABLE "alert_label_set" (
+  "id" UUID PRIMARY KEY,
+  "alert" string REFERENCES alerts (fingerprint) NOT NUll,
+  "label" UUID REFERENCES labels (id) NOT NUll
+);
+
+CREATE TABLE "alert_annotation_set" (
+  "id" UUID PRIMARY KEY,
+  "alert" string REFERENCES alerts (fingerprint) NOT NULL,
+  "annotation" UUID REFERENCES annotations (id) NOT NULL
+);
+
+CREATE UNIQUE INDEX labels_key_value_unique ON "labels" ("key", "value");
+
+CREATE UNIQUE INDEX anno_key_value_unique ON "annotations" ("key", "value");
+
+CREATE UNIQUE INDEX alert_lbl_set_alert_lbl_unique ON "alert_label_set" ("alert", "label");
+
+CREATE UNIQUE INDEX alert_anno_set_alert_lbl_unique ON "alert_annotation_set" ("alert", "annotation");

analytics/internal/queries.sql.go

@@ -0,0 +1,39 @@
+# TODO(khellemun): add sqlc make target
+version: "2"
+sql:
+  - engine: "postgresql"
+    queries: "types/queries.sql"
+    schema: "analytics/schema.sql"
+    gen:
+      go:
+        package: "internal"
+        out: "types/internal"
+        overrides:
+          - db_type: "uuid"
+            go_type:
+              import: "github.com/gofrs/uuid"
+              type: "UUID"
+          - db_type: "uinteger"
+            go_type:
+              type: "uint"
+          - db_type: "ubigint"
+            go_type:
+              type: "uint64"
+  - engine: "postgresql"
+    queries: "analytics/queries.sql"
+    schema: "analytics/schema.sql"
+    gen:
+      go:
+        package: "internal"
+        out: "analytics/internal"
+        overrides:
+          - db_type: "uuid"
+            go_type:
+              import: "github.com/gofrs/uuid"
+              type: "UUID"
+          - db_type: "uinteger"
+            go_type:
+              type: "uint"
+          - db_type: "ubigint"
+            go_type:
+              type: "uint64"