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-rw-r--r--activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb2
1 files changed, 0 insertions, 2 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb b/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb
index b1754e61df..4297c26413 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb
@@ -128,12 +128,10 @@ module ActiveRecord
#
# * columns
# * columns_hash
- # * primary_keys
# * tables
def clear_cache!
@columns.clear
@columns_hash.clear
- @primary_keys.clear
@tables.clear
end