fix: do not flush cache unnecessarily

Follows rails changes introduced in
[rails/rails#48069][rails_pr].
The `exec_query` now flushes the schema cache.
As we now our queries do not alter this cache,
we'd rather not flush.

Might fix #320

[rails_pr]: rails/rails#48069

Author: BuonOmo

.ruby-version

@@ -1 +1 @@
-3.2.1
+3.2.3

lib/active_record/connection_adapters/cockroachdb/schema_statements.rb

@@ -47,7 +47,7 @@ def primary_key(table_name)
         # so we append it manually.
         def foreign_keys(table_name)
           scope = quoted_scope(table_name)
-          fk_info = exec_query(<<~SQL, "SCHEMA")
+          fk_info = internal_exec_query(<<~SQL, "SCHEMA")
             SELECT CASE
               WHEN n2.nspname = current_schema()
               THEN ''

lib/active_record/relation/query_methods_ext.rb

@@ -76,10 +76,9 @@ def index_hint!(hint)
         self
       end
 
-      # TODO: reset or no reset?
-
       def show_create
-        connection.execute("show create table #{connection.quote_table_name self.table_name}").first["create_statement"]
+        quoted_table = connection.quote_table_name self.table_name
+        connection.select_one("show create table #{quoted_table}")["create_statement"]
       end
 
       private