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-rw-r--r--activerecord/lib/active_record/connection_adapters/postgresql/oid/date.rb3
1 files changed, 3 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/date.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/date.rb
index 4f010e0bf8..24a1daa95a 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/date.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/date.rb
@@ -9,6 +9,9 @@ module ActiveRecord
case value
when "infinity" then ::Float::INFINITY
when "-infinity" then -::Float::INFINITY
+ when / BC$/
+ astronomical_year = format("%04d", -value[/^\d+/].to_i + 1)
+ super(value.sub(/ BC$/, "").sub(/^\d+/, astronomical_year))
else
super
end