diff --git a/application/common/Model/TaskMember.php b/application/common/Model/TaskMember.php
index cd56595..5be1d01 100644
--- a/application/common/Model/TaskMember.php
+++ b/application/common/Model/TaskMember.php
@@ -35,7 +35,7 @@ class TaskMember extends CommonModel
         }
         $currentMember = getCurrentMember();
         $taskExecutor = self::where(['is_executor' => 1, 'task_code' => $taskCode])->find(); //原执行者
-        if ($taskExecutor['member_code'] == $memberCode) {
+        if ($taskExecutor && $taskExecutor['member_code'] == $memberCode) {
             //已经是本人
             return true;
         }
diff --git a/data/2.8.0/pearproject.sql b/data/2.8.0/pearproject.sql
index c4c1b8d..16ebdec 100644
--- a/data/2.8.0/pearproject.sql
+++ b/data/2.8.0/pearproject.sql
@@ -5,7 +5,7 @@
  Source Server Type    : MySQL
  Source Server Version : 50726
  Source Host           : localhost:3306
- Source Schema         : pearprojectpro
+ Source Schema         : pearproject
 
  Target Server Type    : MySQL
  Target Server Version : 50726
diff --git a/data/pearproject.sql b/data/pearproject.sql
index c4c1b8d..16ebdec 100644
--- a/data/pearproject.sql
+++ b/data/pearproject.sql
@@ -5,7 +5,7 @@
  Source Server Type    : MySQL
  Source Server Version : 50726
  Source Host           : localhost:3306
- Source Schema         : pearprojectpro
+ Source Schema         : pearproject
 
  Target Server Type    : MySQL
  Target Server Version : 50726
diff --git a/thinkphp/library/think/db/Query.php b/thinkphp/library/think/db/Query.php
index 5b1785e..954c00c 100644
--- a/thinkphp/library/think/db/Query.php
+++ b/thinkphp/library/think/db/Query.php
@@ -565,7 +565,7 @@ class Query
                         $seq = (ord(substr($type($value), 0, 1)) % $rule['num']) + 1;
                     } else {
                         // 按照字段的首字母的值分表
-                        $seq = (ord($value{0}) % $rule['num']) + 1;
+                        $seq = (ord($value[0]) % $rule['num']) + 1;
                     }
             }
             return $this->getTable() . '_' . $seq;