Merge pull request #217 from garaio/explain_fix_for_multiline_queries

Multiline queries do not raise error when explained.

* Fixes #217.
* Thanks @christophritler.

Author: metaskills

lib/active_record/connection_adapters/sqlserver/core_ext/explain.rb

@@ -23,7 +23,7 @@ def unprepare_sqlserver_statement(sql)
               executesql_args = executesql.split(', ')
               found_args = executesql_args.reject! { |arg| arg =~ SQLSERVER_PARAM_MATCHER }
               executesql_args.pop if found_args && executesql_args.many?
-              executesql = executesql_args.join(', ').strip.match(/N'(.*)'/)[1]
+              executesql = executesql_args.join(', ').strip.match(/N'(.*)'/m)[1]
               Utils.unquote_string(executesql)
             else
               sql

test/cases/showplan_test_sqlserver.rb

@@ -12,6 +12,12 @@ class ShowplanTestSqlserver < ActiveRecord::TestCase
       assert plan.starts_with?("EXPLAIN for: SELECT [cars].* FROM [cars] WHERE [cars].[id] = 1")
       assert plan.include?("Clustered Index Seek"), 'make sure we do not showplan the sp_executesql'
     end
+
+    should 'from multiline statement' do
+      plan = Car.where("\n id = 1 \n").explain
+      assert plan.starts_with?("EXPLAIN for: SELECT [cars].* FROM [cars] WHERE (\n id = 1 \n)")
+      assert plan.include?("Clustered Index Seek"), 'make sure we do not showplan the sp_executesql'
+    end
 
     should 'from prepared statement' do
       plan = capture_logger do