Merge pull request #2518 from poanetwork/ab-create-suggested-indexes

create suggested indexes

CHANGELOG.md

@@ -47,6 +47,7 @@
 - [#2520](https://github.com/poanetwork/blockscout/pull/2520) - Hide loading message when fetching is failed
 - [#2523](https://github.com/poanetwork/blockscout/pull/2523) - Avoid importing internal_transactions of pending transactions
 - [#2519](https://github.com/poanetwork/blockscout/pull/2519) - enable `First` page button in pagination
+- [#2518](https://github.com/poanetwork/blockscout/pull/2518) - create suggested indexes
 - [#2517](https://github.com/poanetwork/blockscout/pull/2517) - remove duplicate indexes
 - [#2515](https://github.com/poanetwork/blockscout/pull/2515) - do not aggregate NFT token transfers
 - [#2514](https://github.com/poanetwork/blockscout/pull/2514) - Isolating of staking dapp css && extracting of non-critical css

apps/explorer/priv/repo/migrations/20190807113117_create_suggested_indexes.exs

@@ -0,0 +1,8 @@
+defmodule Explorer.Repo.Migrations.CreateSuggestedIndexes do
+  use Ecto.Migration
+
+  def change do
+    create_if_not_exists(index(:address_token_balances, [:block_number, :address_hash]))
+    create_if_not_exists(index(:block_rewards, [:block_hash]))
+  end
+end