Apply monkey es for SQL Server connections only

CHANGELOG.md

@@ -1,3 +1,17 @@
+##
+
+#### Fixed
+
+- [#933](https://.com/rails-sqlserver/activerecord-sqlserver-adapter/pull/933) Conditionally apply SQL Server monkey es to ActiveRecord so that it is safe to use this gem alongside other database adapters (e.g. PostgreSQL) in a multi-database Rails app
+
+#### Changed
+
+- ...
+
+#### Added
+
+- ...
+
 ## v6.1.0.0
 
 - No changes

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

@@ -10,6 +10,8 @@ module AttributeMethods
 private
 
 def attributes_for_update(attribute_names)
+return super unless self.class.connection.adapter_name == "SQLServer"
+
 super.reject do |name|
 column = self.class.columns_hash[name]
 column && column.respond_to?(:is_identity?) && column.is_identity?

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

@@ -10,6 +10,8 @@ module CoreExt
 module Calculations
 # Same as original except we don't perform PostgreSQL hack that removes ordering.
 def calculate(operation, column_name)
+return super unless klass.connection.adapter_name == "SQLServer"
+
 if has_include?(column_name)
 relation = apply_join_dependency
 
@@ -29,6 +31,8 @@ def calculate(operation, column_name)
 private
 
 def build_count_subquery(relation, column_name, distinct)
+return super unless klass.connection.adapter_name == "SQLServer"
+
 super(relation.unscope(:order), column_name, distinct)
 end
 end

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

@@ -9,6 +9,8 @@ module Explain
 SQLSERVER_STATEMENT_REGEXP = /N'(.+)', N'(.+)', (.+)/
 
 def exec_explain(queries)
+return super unless connection.adapter_name == "SQLServer"
+
 unprepared_queries = queries.map do |(sql, binds)|
 [unprepare_sqlserver_statement(sql, binds), binds]
 end

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

@@ -12,6 +12,8 @@ module FinderMethods
 
 # Same as original except we order by values in distinct select if present.
 def construct_relation_for_exists(conditions)
+return super unless klass.connection.adapter_name == "SQLServer"
+
 conditions = sanitize_forbidden_attributes(conditions)
 
 if distinct_value && offset_value

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

@@ -10,6 +10,8 @@ module Preloader
 private
 
 def records_for(ids)
+return super unless klass.connection.adapter_name == "SQLServer"
+
 ids.each_slice(in_clause_length).flat_map do |slice|
 scope.where(association_key_name => slice).load do |record|
 # Processing only the first owner