1 files changed, 4 insertions, 2 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
index 332ac9d88c..2b33a5b9cb 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
@@ -770,9 +770,11 @@ module ActiveRecord
         #  - format_type includes the column size constraint, e.g. varchar(50)
         #  - ::regclass is a function that gives the id for a table name
         def column_definitions(table_name) # :nodoc:
-          exec_query(<<-end_sql, 'SCHEMA').rows
+          query(<<-end_sql, 'SCHEMA')
               SELECT a.attname, format_type(a.atttypid, a.atttypmod),
-                     pg_get_expr(d.adbin, d.adrelid), a.attnotnull, a.atttypid, a.atttypmod
+                     pg_get_expr(d.adbin, d.adrelid), a.attnotnull, a.atttypid, a.atttypmod,
+             (SELECT c.collname FROM pg_collation c, pg_type t
+               WHERE c.oid = a.attcollation AND t.oid = a.atttypid AND a.attcollation <> t.typcollation)
                 FROM pg_attribute a LEFT JOIN pg_attrdef d
                   ON a.attrelid = d.adrelid AND a.attnum = d.adnum
                WHERE a.attrelid = '#{quote_table_name(table_name)}'::regclass