Account key for search records

Add an account key field to improve search performance. This field
allows us to filter the records by account directly in the fulltext
index, so we only need to examine rows belonging to the relevant account.

db/migrate/20251121092508_add_account_key_to_search_records.rb

@@ -0,0 +1,37 @@
+class AddAccountKeyToSearchRecords < ActiveRecord::Migration[8.2]
+  def up
+    16.times do |shard_id|
+      table_name = "search_records_#{shard_id}"
+
+      # Add account_key column
+      add_column table_name, :account_key, :string, null: false, default: ""
+
+      # Backfill existing records with account_key
+      execute <<-SQL
+        UPDATE #{table_name}
+        SET account_key = CONCAT('account', account_id)
+      SQL
+
+      # Create new fulltext index including account_key
+      add_index table_name, [:account_key, :content, :title], type: :fulltext
+
+      # Drop existing fulltext index
+      remove_index table_name, column: [:content, :title], type: :fulltext
+    end
+  end
+
+  def down
+    16.times do |shard_id|
+      table_name = "search_records_#{shard_id}"
+
+      # Drop new fulltext index
+      remove_index table_name, column: [:account_key, :content, :title], type: :fulltext
+
+      # Restore original fulltext index
+      add_index table_name, [:content, :title], type: :fulltext
+
+      # Remove account_key column
+      remove_column table_name, :account_key
+    end
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.2].define(version: 2025_11_20_203100) do
+ActiveRecord::Schema[8.2].define(version: 2025_11_21_092508) do
   create_table "accesses", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.datetime "accessed_at"
     t.uuid "account_id", null: false
@@ -408,8 +408,24 @@ ActiveRecord::Schema[8.2].define(version: 2025_11_20_203100) do
     t.index ["user_id"], name: "index_search_queries_on_user_id"
   end
 
+  create_table "search_records", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
+    t.uuid "account_id", null: false
+    t.string "account_key", null: false
+    t.uuid "board_id", null: false
+    t.uuid "card_id", null: false
+    t.text "content"
+    t.datetime "created_at", null: false
+    t.uuid "searchable_id", null: false
+    t.string "searchable_type", null: false
+    t.string "title"
+    t.index ["account_id"], name: "index_search_records_on_account_id"
+    t.index ["account_key", "content", "title"], name: "index_search_records_on_account_key_and_content_and_title", type: :fulltext
+    t.index ["searchable_type", "searchable_id"], name: "index_search_records_on_searchable_type_and_searchable_id", unique: true
+  end
+
   create_table "search_records_0", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.uuid "account_id", null: false
+    t.string "account_key", default: "", null: false
     t.uuid "board_id", null: false
     t.uuid "card_id", null: false
     t.text "content"
@@ -418,12 +434,13 @@ ActiveRecord::Schema[8.2].define(version: 2025_11_20_203100) do
     t.string "searchable_type", null: false
     t.string "title"
     t.index ["account_id"], name: "index_search_records_0_on_account_id"
-    t.index ["content", "title"], name: "index_search_records_0_on_content_and_title", type: :fulltext
+    t.index ["account_key", "content", "title"], name: "index_search_records_0_on_account_key_and_content_and_title", type: :fulltext
     t.index ["searchable_type", "searchable_id"], name: "index_search_records_0_on_searchable_type_and_searchable_id", unique: true
   end
 
   create_table "search_records_1", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.uuid "account_id", null: false
+    t.string "account_key", default: "", null: false
     t.uuid "board_id", null: false
     t.uuid "card_id", null: false
     t.text "content"
@@ -432,12 +449,13 @@ ActiveRecord::Schema[8.2].define(version: 2025_11_20_203100) do
     t.string "searchable_type", null: false
     t.string "title"
     t.index ["account_id"], name: "index_search_records_1_on_account_id"
-    t.index ["content", "title"], name: "index_search_records_1_on_content_and_title", type: :fulltext
+    t.index ["account_key", "content", "title"], name: "index_search_records_1_on_account_key_and_content_and_title", type: :fulltext
     t.index ["searchable_type", "searchable_id"], name: "index_search_records_1_on_searchable_type_and_searchable_id", unique: true
   end
 
   create_table "search_records_10", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.uuid "account_id", null: false
+    t.string "account_key", default: "", null: false
     t.uuid "board_id", null: false
     t.uuid "card_id", null: false
     t.text "content"
@@ -446,12 +464,13 @@ ActiveRecord::Schema[8.2].define(version: 2025_11_20_203100) do
     t.string "searchable_type", null: false
     t.string "title"
     t.index ["account_id"], name: "index_search_records_10_on_account_id"
-    t.index ["content", "title"], name: "index_search_records_10_on_content_and_title", type: :fulltext
+    t.index ["account_key", "content", "title"], name: "index_search_records_10_on_account_key_and_content_and_title", type: :fulltext
     t.index ["searchable_type", "searchable_id"], name: "index_search_records_10_on_searchable_type_and_searchable_id", unique: true
   end
 
   create_table "search_records_11", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.uuid "account_id", null: false
+    t.string "account_key", default: "", null: false
     t.uuid "board_id", null: false
     t.uuid "card_id", null: false
     t.text "content"
@@ -460,12 +479,13 @@ ActiveRecord::Schema[8.2].define(version: 2025_11_20_203100) do
     t.string "searchable_type", null: false
     t.string "title"
     t.index ["account_id"], name: "index_search_records_11_on_account_id"
-    t.index ["content", "title"], name: "index_search_records_11_on_content_and_title", type: :fulltext
+    t.index ["account_key", "content", "title"], name: "index_search_records_11_on_account_key_and_content_and_title", type: :fulltext
     t.index ["searchable_type", "searchable_id"], name: "index_search_records_11_on_searchable_type_and_searchable_id", unique: true
   end
 
   create_table "search_records_12", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.uuid "account_id", null: false
+    t.string "account_key", default: "", null: false
     t.uuid "board_id", null: false
     t.uuid "card_id", null: false
     t.text "content"
@@ -474,12 +494,13 @@ ActiveRecord::Schema[8.2].define(version: 2025_11_20_203100) do
     t.string "searchable_type", null: false
     t.string "title"
     t.index ["account_id"], name: "index_search_records_12_on_account_id"
-    t.index ["content", "title"], name: "index_search_records_12_on_content_and_title", type: :fulltext
+    t.index ["account_key", "content", "title"], name: "index_search_records_12_on_account_key_and_content_and_title", type: :fulltext
     t.index ["searchable_type", "searchable_id"], name: "index_search_records_12_on_searchable_type_and_searchable_id", unique: true
   end
 
   create_table "search_records_13", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.uuid "account_id", null: false
+    t.string "account_key", default: "", null: false
     t.uuid "board_id", null: false
     t.uuid "card_id", null: false
     t.text "content"
@@ -488,12 +509,13 @@ ActiveRecord::Schema[8.2].define(version: 2025_11_20_203100) do
     t.string "searchable_type", null: false
     t.string "title"
     t.index ["account_id"], name: "index_search_records_13_on_account_id"
-    t.index ["content", "title"], name: "index_search_records_13_on_content_and_title", type: :fulltext
+    t.index ["account_key", "content", "title"], name: "index_search_records_13_on_account_key_and_content_and_title", type: :fulltext
     t.index ["searchable_type", "searchable_id"], name: "index_search_records_13_on_searchable_type_and_searchable_id", unique: true
   end
 
   create_table "search_records_14", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.uuid "account_id", null: false
+    t.string "account_key", default: "", null: false
     t.uuid "board_id", null: false
     t.uuid "card_id", null: false
     t.text "content"
@@ -502,12 +524,13 @@ ActiveRecord::Schema[8.2].define(version: 2025_11_20_203100) do
     t.string "searchable_type", null: false
     t.string "title"
     t.index ["account_id"], name: "index_search_records_14_on_account_id"
-    t.index ["content", "title"], name: "index_search_records_14_on_content_and_title", type: :fulltext
+    t.index ["account_key", "content", "title"], name: "index_search_records_14_on_account_key_and_content_and_title", type: :fulltext
     t.index ["searchable_type", "searchable_id"], name: "index_search_records_14_on_searchable_type_and_searchable_id", unique: true
   end
 
   create_table "search_records_15", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.uuid "account_id", null: false
+    t.string "account_key", default: "", null: false
     t.uuid "board_id", null: false
     t.uuid "card_id", null: false
     t.text "content"
@@ -516,12 +539,13 @@ ActiveRecord::Schema[8.2].define(version: 2025_11_20_203100) do
     t.string "searchable_type", null: false
     t.string "title"
     t.index ["account_id"], name: "index_search_records_15_on_account_id"
-    t.index ["content", "title"], name: "index_search_records_15_on_content_and_title", type: :fulltext
+    t.index ["account_key", "content", "title"], name: "index_search_records_15_on_account_key_and_content_and_title", type: :fulltext
     t.index ["searchable_type", "searchable_id"], name: "index_search_records_15_on_searchable_type_and_searchable_id", unique: true
   end
 
   create_table "search_records_2", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.uuid "account_id", null: false
+    t.string "account_key", default: "", null: false
     t.uuid "board_id", null: false
     t.uuid "card_id", null: false
     t.text "content"
@@ -530,12 +554,13 @@ ActiveRecord::Schema[8.2].define(version: 2025_11_20_203100) do
     t.string "searchable_type", null: false
     t.string "title"
     t.index ["account_id"], name: "index_search_records_2_on_account_id"
-    t.index ["content", "title"], name: "index_search_records_2_on_content_and_title", type: :fulltext
+    t.index ["account_key", "content", "title"], name: "index_search_records_2_on_account_key_and_content_and_title", type: :fulltext
     t.index ["searchable_type", "searchable_id"], name: "index_search_records_2_on_searchable_type_and_searchable_id", unique: true
   end
 
   create_table "search_records_3", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.uuid "account_id", null: false
+    t.string "account_key", default: "", null: false
     t.uuid "board_id", null: false
     t.uuid "card_id", null: false
     t.text "content"
@@ -544,12 +569,13 @@ ActiveRecord::Schema[8.2].define(version: 2025_11_20_203100) do
     t.string "searchable_type", null: false
     t.string "title"
     t.index ["account_id"], name: "index_search_records_3_on_account_id"
-    t.index ["content", "title"], name: "index_search_records_3_on_content_and_title", type: :fulltext
+    t.index ["account_key", "content", "title"], name: "index_search_records_3_on_account_key_and_content_and_title", type: :fulltext
     t.index ["searchable_type", "searchable_id"], name: "index_search_records_3_on_searchable_type_and_searchable_id", unique: true
   end
 
   create_table "search_records_4", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.uuid "account_id", null: false
+    t.string "account_key", default: "", null: false
     t.uuid "board_id", null: false
     t.uuid "card_id", null: false
     t.text "content"
@@ -558,12 +584,13 @@ ActiveRecord::Schema[8.2].define(version: 2025_11_20_203100) do
     t.string "searchable_type", null: false
     t.string "title"
     t.index ["account_id"], name: "index_search_records_4_on_account_id"
-    t.index ["content", "title"], name: "index_search_records_4_on_content_and_title", type: :fulltext
+    t.index ["account_key", "content", "title"], name: "index_search_records_4_on_account_key_and_content_and_title", type: :fulltext
     t.index ["searchable_type", "searchable_id"], name: "index_search_records_4_on_searchable_type_and_searchable_id", unique: true
   end
 
   create_table "search_records_5", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.uuid "account_id", null: false
+    t.string "account_key", default: "", null: false
     t.uuid "board_id", null: false
     t.uuid "card_id", null: false
     t.text "content"
@@ -572,12 +599,13 @@ ActiveRecord::Schema[8.2].define(version: 2025_11_20_203100) do
     t.string "searchable_type", null: false
     t.string "title"
     t.index ["account_id"], name: "index_search_records_5_on_account_id"
-    t.index ["content", "title"], name: "index_search_records_5_on_content_and_title", type: :fulltext
+    t.index ["account_key", "content", "title"], name: "index_search_records_5_on_account_key_and_content_and_title", type: :fulltext
     t.index ["searchable_type", "searchable_id"], name: "index_search_records_5_on_searchable_type_and_searchable_id", unique: true
   end
 
   create_table "search_records_6", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.uuid "account_id", null: false
+    t.string "account_key", default: "", null: false
     t.uuid "board_id", null: false
     t.uuid "card_id", null: false
     t.text "content"
@@ -586,12 +614,13 @@ ActiveRecord::Schema[8.2].define(version: 2025_11_20_203100) do
     t.string "searchable_type", null: false
     t.string "title"
     t.index ["account_id"], name: "index_search_records_6_on_account_id"
-    t.index ["content", "title"], name: "index_search_records_6_on_content_and_title", type: :fulltext
+    t.index ["account_key", "content", "title"], name: "index_search_records_6_on_account_key_and_content_and_title", type: :fulltext
     t.index ["searchable_type", "searchable_id"], name: "index_search_records_6_on_searchable_type_and_searchable_id", unique: true
   end
 
   create_table "search_records_7", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.uuid "account_id", null: false
+    t.string "account_key", default: "", null: false
     t.uuid "board_id", null: false
     t.uuid "card_id", null: false
     t.text "content"
@@ -600,12 +629,13 @@ ActiveRecord::Schema[8.2].define(version: 2025_11_20_203100) do
     t.string "searchable_type", null: false
     t.string "title"
     t.index ["account_id"], name: "index_search_records_7_on_account_id"
-    t.index ["content", "title"], name: "index_search_records_7_on_content_and_title", type: :fulltext
+    t.index ["account_key", "content", "title"], name: "index_search_records_7_on_account_key_and_content_and_title", type: :fulltext
     t.index ["searchable_type", "searchable_id"], name: "index_search_records_7_on_searchable_type_and_searchable_id", unique: true
   end
 
   create_table "search_records_8", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.uuid "account_id", null: false
+    t.string "account_key", default: "", null: false
     t.uuid "board_id", null: false
     t.uuid "card_id", null: false
     t.text "content"
@@ -614,12 +644,13 @@ ActiveRecord::Schema[8.2].define(version: 2025_11_20_203100) do
     t.string "searchable_type", null: false
     t.string "title"
     t.index ["account_id"], name: "index_search_records_8_on_account_id"
-    t.index ["content", "title"], name: "index_search_records_8_on_content_and_title", type: :fulltext
+    t.index ["account_key", "content", "title"], name: "index_search_records_8_on_account_key_and_content_and_title", type: :fulltext
     t.index ["searchable_type", "searchable_id"], name: "index_search_records_8_on_searchable_type_and_searchable_id", unique: true
   end
 
   create_table "search_records_9", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.uuid "account_id", null: false
+    t.string "account_key", default: "", null: false
     t.uuid "board_id", null: false
     t.uuid "card_id", null: false
     t.text "content"
@@ -628,7 +659,7 @@ ActiveRecord::Schema[8.2].define(version: 2025_11_20_203100) do
     t.string "searchable_type", null: false
     t.string "title"
     t.index ["account_id"], name: "index_search_records_9_on_account_id"
-    t.index ["content", "title"], name: "index_search_records_9_on_content_and_title", type: :fulltext
+    t.index ["account_key", "content", "title"], name: "index_search_records_9_on_account_key_and_content_and_title", type: :fulltext
     t.index ["searchable_type", "searchable_id"], name: "index_search_records_9_on_searchable_type_and_searchable_id", unique: true
   end