diff --git a/db/update18.3.sql b/db/update18.3.sql
index c14f995219..1e292273a8 100644
--- a/db/update18.3.sql
+++ b/db/update18.3.sql
@@ -564,6 +564,8 @@ CHANGE `activatedDate` `activatedDate` datetime NULL;
 ALTER TABLE `zt_kanbancard`
 CHANGE `begin` `begin` date NULL,
 CHANGE `end` `end` date NULL,
+CHANGE `fromID` `fromID` mediumint unsigned NOT NULL DEFAULT '0',
+CHANGE `fromType` `fromType` varchar(30) NOT NULL DEFAULT '',
 CHANGE `whitelist` `whitelist` text NULL,
 CHANGE `lastEditedBy` `lastEditedBy` char(30) NOT NULL DEFAULT '',
 CHANGE `lastEditedDate` `lastEditedDate` datetime NULL,
diff --git a/db/zentao.sql b/db/zentao.sql
index d56221ad7f..f4d0802ac9 100755
--- a/db/zentao.sql
+++ b/db/zentao.sql
@@ -1017,8 +1017,8 @@ CREATE TABLE IF NOT EXISTS `zt_kanbancard` (
   `kanban` mediumint(8) unsigned NOT NULL,
   `region` mediumint(8) unsigned NOT NULL,
   `group` mediumint(8) unsigned NOT NULL,
-  `fromID` mediumint(8) unsigned NOT NULL,
-  `fromType` varchar(30) NOT NULL,
+  `fromID` mediumint(8) unsigned NOT NULL DEFAULT '0',
+  `fromType` varchar(30) NOT NULL DEFAULT '',
   `name` varchar(255) NOT NULL,
   `status` varchar(30) NOT NULL DEFAULT 'doing',
   `pri` mediumint(8) unsigned NOT NULL,
diff --git a/lib/dao/dm.class.php b/lib/dao/dm.class.php
index e83ba45c1b..9c2f015f0a 100644
--- a/lib/dao/dm.class.php
+++ b/lib/dao/dm.class.php
@@ -70,8 +70,10 @@ class dm extends dao
      */
     public function descTable($tableName)
     {
+        $this->dbh->setAttribute(PDO::ATTR_CASE, PDO::CASE_LOWER);
         $sql = "select * from all_tab_columns where table_name = '$tableName'";
         $rawFields = $this->dbh->rawQuery($sql)->fetchAll();
+        $this->dbh->setAttribute(PDO::ATTR_CASE, PDO::CASE_NATURAL);
 
         $fields = array();
         foreach($rawFields as $rawField)
diff --git a/module/execution/model.php b/module/execution/model.php
index faa7a92ad8..1bd72b4d84 100755
--- a/module/execution/model.php
+++ b/module/execution/model.php
@@ -2783,7 +2783,7 @@ class executionModel extends model
      */
     public function getToImport($executionIds, $type, $model = '')
     {
-        return $this->dao->select('t1.id,concat_ws(" / ", t2.name, t1.name) as name')->from(TABLE_EXECUTION)->alias('t1')
+        return $this->dao->select("t1.id,concat_ws(' / ', t2.name, t1.name) as name")->from(TABLE_EXECUTION)->alias('t1')
             ->leftJoin(TABLE_PROJECT)->alias('t2')->on('t2.id=t1.project')
             ->where('t1.id')->in($executionIds)
             ->beginIF(!$this->app->user->admin)->andWhere('t1.id')->in($this->app->user->view->sprints)->fi()