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-rw-r--r--activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb3
1 files changed, 3 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
index ad2e8634eb..7ee8f40631 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
@@ -6,6 +6,9 @@ require 'bigdecimal/util'
module ActiveRecord
module ConnectionAdapters #:nodoc:
+ # Abstract representation of an index definition on a table. Instances of
+ # this type are typically created and returned by methods in database
+ # adapters. e.g. ActiveRecord::ConnectionAdapters::AbstractMysqlAdapter#indexes
class IndexDefinition < Struct.new(:table, :name, :unique, :columns, :lengths, :orders, :where) #:nodoc:
end