Use `table_exists?` from the schema cache.

2 files changed, 3 insertions, 5 deletions

diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index 58d23d2f78..ba75dc6d09 100644
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -762,7 +762,7 @@ module ActiveRecord #:nodoc:
 
       # Indicates whether the table associated with this class exists
       def table_exists?
-        connection.table_exists?(table_name)
+        connection.schema_cache.table_exists?(table_name)
       end
 
       # Returns an array of column objects for the table associated with this class.
diff --git a/activerecord/lib/active_record/connection_adapters/schema_cache.rb b/activerecord/lib/active_record/connection_adapters/schema_cache.rb
index b14b37ce89..bee03abd44 100644
--- a/activerecord/lib/active_record/connection_adapters/schema_cache.rb
+++ b/activerecord/lib/active_record/connection_adapters/schema_cache.rb
@@ -42,10 +42,7 @@ module ActiveRecord
       def table_exists?(name)
         return @tables[name] if @tables.key? name
 
-        connection.tables.each { |table| @tables[table] = true }
-        @tables[name] = connection.table_exists?(name) if !@tables.key?(name)
-
-        @tables[name]
+        @tables[name] = connection.table_exists?(name)
       end
 
       # Clears out internal caches:
@@ -66,6 +63,7 @@ module ActiveRecord
         @columns_hash.delete table_name
         @column_defaults.delete table_name
         @primary_keys.delete table_name
+        @tables.delete table_name
       end
     end
   end