1 files changed, 3 insertions, 4 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb b/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb
index 544374586c..bee74dc33d 100644
--- a/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb
@@ -15,6 +15,8 @@ require "sqlite3"
 module ActiveRecord
   module ConnectionHandling # :nodoc:
     def sqlite3_connection(config)
+      config = config.symbolize_keys
+
       # Require database.
       unless config[:database]
         raise ArgumentError, "No database file specified. Missing argument: database"
@@ -31,7 +33,7 @@ module ActiveRecord
 
       db = SQLite3::Database.new(
         config[:database].to_s,
-        results_as_hash: true
+        config.merge(results_as_hash: true)
       )
 
       db.busy_timeout(ConnectionAdapters::SQLite3Adapter.type_cast_config_to_integer(config[:timeout])) if config[:timeout]
@@ -455,9 +457,6 @@ module ActiveRecord
         def copy_table_indexes(from, to, rename = {})
           indexes(from).each do |index|
             name = index.name
-            # indexes sqlite creates for internal use start with `sqlite_` and
-            # don't need to be copied
-            next if name.starts_with?("sqlite_")
             if to == "a#{from}"
               name = "t#{name}"
             elsif from == "a#{to}"