allow to normalize multiple views on the same transaction

lib/scenic/adapters/postgres.rb

@@ -308,11 +308,13 @@ def refresh_materialized_view(name, concurrently: false, cascade: false)
       #
       # @return [String]
       def normalize_sql(sql_definition)
-        temporary_view_name = "temp_view_for_decompilation"
+        temporary_view_name = "temp_view_for_normalization"
         view_name = quote_table_name(temporary_view_name)
         transaction do
           execute "CREATE TEMPORARY VIEW #{view_name} AS #{sql_definition};"
-          normalize_view_sql(temporary_view_name)
+          view = normalize_view_sql(temporary_view_name)
+          execute "DROP VIEW IF EXISTS #{view_name};"
+          view
         end
       end
 

spec/scenic/adapters/postgres_spec.rb

@@ -310,6 +310,15 @@ module Adapters
           expect(adapter.normalize_sql("SELECT text 'Elliot' AS name"))
             .to eq("SELECT 'Elliot'::text AS name;")
         end
+        it "allow to normalize multiple queries on the same transaction" do
+          adapter = Postgres.new
+          ActiveRecord::Base.connection.transaction do
+            expect do
+              adapter.normalize_sql("SELECT text 'Elliot' AS name")
+              adapter.normalize_sql("SELECT text 'John' AS first_name")
+            end.to_not raise_error
+          end
+        end
       end
       describe "#normalize_sql" do
         it "returns scenic view objects for plain old views" do