add pings table

migrations/032-create_machine_pings_table.js

@@ -0,0 +1,29 @@
+var db = require('./db')
+
+exports.up = function (next) {
+  var sql = [
+    `create table machine_pings (
+    id uuid PRIMARY KEY,
+    device_id text not null,
+    serial_number integer not null,
+    device_time timestamptz not null,
+    created timestamptz not null default now())`,
+    `create table aggregated_machine_pings (
+    id uuid PRIMARY KEY,
+    device_id text not null,
+    dropped_pings integer not null,
+    total_pings integer not null,
+    lag_sd_ms integer not null,
+    lag_min_ms integer not null,
+    lag_max_ms integer not null,
+    lag_median_ms integer not null,
+    day date not null)`,
+    'alter table machine_events drop column device_time',
+    'alter table machine_events add column device_time timestamptz'
+  ]
+  db.multi(sql, next)
+}
+
+exports.down = function (next) {
+  next()
+}