db alter plan improvements

plugins/dbgate-plugin-mssql/src/backend/MsSqlAnalyser.js

@@ -131,7 +131,7 @@ class MsSqlAnalyser extends DatabaseAnalyser {
       indexes: indexesRows.rows
         .filter(idx => idx.object_id == row.objectId && !idx.is_unique_constraint)
         .map(idx => ({
-          ..._.pick(idx, ['constraintName', 'indexType', 'isUnique']),
+          ..._.pick(idx, ['constraintName', 'indexType', 'isUnique', 'filterDefinition']),
           columns: indexcolsRows.rows
             .filter(col => col.object_id == idx.object_id && col.index_id == idx.index_id)
             .map(col => ({

plugins/dbgate-plugin-mssql/src/backend/sql/indexes.js

@@ -1,5 +1,6 @@
 module.exports = `
-select i.object_id, i.name as constraintName, i.type_desc as indexType, i.is_unique as isUnique,i.index_id, i.is_unique_constraint  from sys.indexes i
+select i.object_id, i.name as constraintName, i.type_desc as indexType, i.is_unique as isUnique,i.index_id, i.is_unique_constraint, i.filter_definition AS filterDefinition
+from sys.indexes i
 inner join sys.objects o on i.object_id = o.object_id
 INNER JOIN sys.schemas u ON u.schema_id=o.schema_id 
 where i.is_primary_key=0

plugins/dbgate-plugin-mssql/src/frontend/driver.js

@@ -39,6 +39,7 @@ const dialect = {
   createCheck: true,
   dropCheck: true,
   renameSqlObject: true,
+  filteredIndexes: true,
 
   dropReferencesWhenDropTable: true,