optimize migrations

priv/repo/migrations/20250704174406_optimize_map_queries.exs

@@ -12,18 +12,9 @@ defmodule Aprsme.Repo.Migrations.OptimizeMapQueries do
     create_if_not_exists index(:packets, [:symbol_table_id, :symbol_code, :received_at])
     create_if_not_exists index(:packets, [:device_identifier])
     create_if_not_exists index(:packets, [:region, :has_position, :received_at])
-
-    # Add partial index for weather packets (this is valid)
-    execute """
-    CREATE INDEX CONCURRENTLY IF NOT EXISTS packets_weather_idx
-    ON packets (received_at DESC)
-    WHERE data_type = 'weather'
-    OR (symbol_table_id = '/' AND symbol_code = '_')
-    """
   end
 
   def down do
-    execute "DROP INDEX IF EXISTS packets_weather_idx"
     drop index(:packets, [:region, :has_position, :received_at])
     drop index(:packets, [:device_identifier])
     drop index(:packets, [:symbol_table_id, :symbol_code, :received_at])

priv/repo/migrations/20250711180558_add_weather_packets_index.exs

@@ -0,0 +1,19 @@
+defmodule Aprsme.Repo.Migrations.AddWeatherPacketsIndex do
+  use Ecto.Migration
+  @disable_ddl_transaction true
+  @disable_migration_lock true
+
+  def up do
+    # Add partial index for weather packets using CONCURRENTLY for better performance
+    execute """
+    CREATE INDEX CONCURRENTLY IF NOT EXISTS packets_weather_idx
+    ON packets (received_at DESC)
+    WHERE data_type = 'weather'
+    OR (symbol_table_id = '/' AND symbol_code = '_')
+    """
+  end
+
+  def down do
+    execute "DROP INDEX IF EXISTS packets_weather_idx"
+  end
+end