Use joins instead of sub-queries in group by/sort by when using custom fields (#12713).

Sub-queries in group by are not supported by SQLServer.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11102 e93f8b46-1217-0410-a6f0-8f06a7374b81

3 files changed, 26 insertions, 22 deletions

diff --git a/app/models/custom_field.rb b/app/models/custom_field.rb
index 40582ff73..a9c42d4bb 100644
--- a/app/models/custom_field.rb
+++ b/app/models/custom_field.rb
@@ -180,18 +180,12 @@ class CustomField < ActiveRecord::Base
     case field_format
       when 'string', 'text', 'list', 'date', 'bool'
         # COALESCE is here to make sure that blank and NULL values are sorted equally
-        "COALESCE((SELECT cv_sort.value FROM #{CustomValue.table_name} cv_sort" +
-          " WHERE cv_sort.customized_type='#{self.class.customized_class.base_class.name}'" +
-          " AND cv_sort.customized_id=#{self.class.customized_class.table_name}.id" +
-          " AND cv_sort.custom_field_id=#{id} LIMIT 1), '')"
+        "COALESCE(#{join_alias}.value, '')"
       when 'int', 'float'
         # Make the database cast values into numeric
         # Postgresql will raise an error if a value can not be casted!
         # CustomValue validations should ensure that it doesn't occur
-        "(SELECT CAST(cv_sort.value AS decimal(30,3)) FROM #{CustomValue.table_name} cv_sort" +
-          " WHERE cv_sort.customized_type='#{self.class.customized_class.base_class.name}'" +
-          " AND cv_sort.customized_id=#{self.class.customized_class.table_name}.id" +
-          " AND cv_sort.custom_field_id=#{id} AND cv_sort.value <> '' AND cv_sort.value IS NOT NULL LIMIT 1)"
+        "CAST(#{join_alias}.value AS decimal(30,3))"
       when 'user', 'version'
         value_class.fields_for_order_statement(value_join_alias)
       else
@@ -207,10 +201,7 @@ class CustomField < ActiveRecord::Base
       when 'list', 'date', 'bool', 'int'
         order_statement
       when 'user', 'version'
-        "COALESCE((SELECT cv_sort.value FROM #{CustomValue.table_name} cv_sort" +
-          " WHERE cv_sort.customized_type='#{self.class.customized_class.base_class.name}'" +
-          " AND cv_sort.customized_id=#{self.class.customized_class.table_name}.id" +
-          " AND cv_sort.custom_field_id=#{id} LIMIT 1), '')"
+        "COALESCE(#{join_alias}.value, '')"
       else
         nil
     end
@@ -230,6 +221,25 @@ class CustomField < ActiveRecord::Base
             " AND #{join_alias}_2.custom_field_id = #{join_alias}.custom_field_id)" +
           " LEFT OUTER JOIN #{value_class.table_name} #{value_join_alias}" +
           " ON CAST(#{join_alias}.value as decimal(30,0)) = #{value_join_alias}.id"
+      when 'int', 'float'
+        "LEFT OUTER JOIN #{CustomValue.table_name} #{join_alias}" +
+          " ON #{join_alias}.customized_type = '#{self.class.customized_class.base_class.name}'" +
+          " AND #{join_alias}.customized_id = #{self.class.customized_class.table_name}.id" +
+          " AND #{join_alias}.custom_field_id = #{id}" +
+          " AND #{join_alias}.value <> ''" +
+          " AND #{join_alias}.id = (SELECT max(#{join_alias}_2.id) FROM #{CustomValue.table_name} #{join_alias}_2" +
+            " WHERE #{join_alias}_2.customized_type = #{join_alias}.customized_type" +
+            " AND #{join_alias}_2.customized_id = #{join_alias}.customized_id" +
+            " AND #{join_alias}_2.custom_field_id = #{join_alias}.custom_field_id)"
+      when 'string', 'text', 'list', 'date', 'bool'
+        "LEFT OUTER JOIN #{CustomValue.table_name} #{join_alias}" +
+          " ON #{join_alias}.customized_type = '#{self.class.customized_class.base_class.name}'" +
+          " AND #{join_alias}.customized_id = #{self.class.customized_class.table_name}.id" +
+          " AND #{join_alias}.custom_field_id = #{id}" +
+          " AND #{join_alias}.id = (SELECT max(#{join_alias}_2.id) FROM #{CustomValue.table_name} #{join_alias}_2" +
+            " WHERE #{join_alias}_2.customized_type = #{join_alias}.customized_type" +
+            " AND #{join_alias}_2.customized_id = #{join_alias}.customized_id" +
+            " AND #{join_alias}_2.custom_field_id = #{join_alias}.custom_field_id)"
       else
         nil
     end
diff --git a/app/models/issue_query.rb b/app/models/issue_query.rb
index 84eb3cf6a..8f7002ad0 100644
--- a/app/models/issue_query.rb
+++ b/app/models/issue_query.rb
@@ -253,7 +253,7 @@ class IssueQuery < Query
     if grouped?
       begin
         # Rails3 will raise an (unexpected) RecordNotFound if there's only a nil group value
-        r = Issue.visible.count(:group => group_by_statement, :include => [:status, :project], :conditions => statement)
+        r = Issue.visible.count(:joins => joins_for_order_statement(group_by_statement), :group => group_by_statement, :include => [:status, :project], :conditions => statement)
       rescue ActiveRecord::RecordNotFound
         r = {nil => issue_count}
       end
diff --git a/test/unit/query_test.rb b/test/unit/query_test.rb
index 3b92ea4dd..693399362 100644
--- a/test/unit/query_test.rb
+++ b/test/unit/query_test.rb
@@ -877,9 +877,7 @@ class QueryTest < ActiveSupport::TestCase
     c = q.available_columns.find {|col| col.is_a?(QueryCustomFieldColumn) && col.custom_field.field_format == 'string' }
     assert c
     assert c.sortable
-    issues = Issue.includes([:assigned_to, :status, :tracker, :project, :priority]).where(
-         q.statement
-       ).order("#{c.sortable} ASC").all
+    issues = q.issues(:order => "#{c.sortable} ASC")
     values = issues.collect {|i| i.custom_value_for(c.custom_field).to_s}
     assert !values.empty?
     assert_equal values.sort, values
@@ -890,9 +888,7 @@ class QueryTest < ActiveSupport::TestCase
     c = q.available_columns.find {|col| col.is_a?(QueryCustomFieldColumn) && col.custom_field.field_format == 'string' }
     assert c
     assert c.sortable
-    issues = Issue.includes([:assigned_to, :status, :tracker, :project, :priority]).where(
-         q.statement
-       ).order("#{c.sortable} DESC").all
+    issues = q.issues(:order => "#{c.sortable} DESC")
     values = issues.collect {|i| i.custom_value_for(c.custom_field).to_s}
     assert !values.empty?
     assert_equal values.sort.reverse, values
@@ -903,9 +899,7 @@ class QueryTest < ActiveSupport::TestCase
     c = q.available_columns.find {|col| col.is_a?(QueryCustomFieldColumn) && col.custom_field.field_format == 'float' }
     assert c
     assert c.sortable
-    issues = Issue.includes([:assigned_to, :status, :tracker, :project, :priority]).where(
-         q.statement
-       ).order("#{c.sortable} ASC").all
+    issues = q.issues(:order => "#{c.sortable} ASC")
     values = issues.collect {|i| begin; Kernel.Float(i.custom_value_for(c.custom_field).to_s); rescue; nil; end}.compact
     assert !values.empty?
     assert_equal values.sort, values