PostgreSQL: Prepare for pg-1.1.0

Version 1.1.0 deprecates exec and async_exec with a params array due to
distinct semantics between calls with and without params array.
Instead exec_params or async_exec_params shall be used.

Moreover in pg-1.1.0 exec_* and prepare methods are aliases for async_exec_*
and async_prepare. async_* methods don't need to be called explicit -
they are the default now, when calling exec_* and prepare.

For pg versions before 1.1, keep using async_exec.

1 files changed, 9 insertions, 1 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
index fdf6f75108..57921cee26 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
@@ -4,6 +4,14 @@
 gem "pg", ">= 0.18", "< 2.0"
 require "pg"
 
+# Use async_exec instead of exec_params on pg versions before 1.1
+class ::PG::Connection
+  unless self.public_method_defined?(:async_exec_params)
+    remove_method :exec_params
+    alias exec_params async_exec
+  end
+end
+
 require "active_record/connection_adapters/abstract_adapter"
 require "active_record/connection_adapters/statement_pool"
 require "active_record/connection_adapters/postgresql/column"
@@ -600,7 +608,7 @@ module ActiveRecord
           type_casted_binds = type_casted_binds(binds)
           log(sql, name, binds, type_casted_binds) do
             ActiveSupport::Dependencies.interlock.permit_concurrent_loads do
-              @connection.async_exec(sql, type_casted_binds)
+              @connection.exec_params(sql, type_casted_binds)
             end
           end
         end