fix: db2 adapter issue (#50)

* fix db2 adaptor issue

issue: #47


Signed-off-by: Macky <liuyunsh@cn.ibm.com>

* fix sql issue and sonar issue for db2adptor

fix #47

Signed-off-by: Macky <liuyunsh@cn.ibm.com>

* update node version from 12 to 16

issue: https://github.com/jcasbin/casbin-spring-boot-starter/runs/4318955733?check_suite_focus=true

Signed-off-by: Macky <liuyunsh@cn.ibm.com>

Co-authored-by: Macky <liuyunsh@cn.ibm.com>

.github/workflows/gradle-ci.yml

@@ -46,7 +46,7 @@ jobs:
       - name: Setup Node.js environment
         uses: actions/setup-node@v2
         with:
-          node-version: 12
+          node-version: 16
       - name: semantic-release
         run: |
           npm install -g semantic-release @semantic-release/exec

src/main/java/org/casbin/adapter/DB2Adapter.java

@@ -13,17 +13,18 @@ public class DB2Adapter extends JdbcAdapter {
 
     private static final String CHECK_TABLE_SQL = "select 1 from syscat.tables where tabname = upper('CASBIN_RULE')";
 
-    private final static String DROP_TABLE_SQL = "DROP TABLE CASBIN_RULE";
+    private static final  String DROP_TABLE_SQL = "DROP TABLE CASBIN_RULE";
 
     private static final String INIT_TABLE_SQL = "CREATE TABLE CASBIN_RULE (" +
-            "  ID int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY, "+
+            "  ID INTEGER NOT NULL GENERATED ALWAYS AS IDENTITY (START WITH 1 INCREMENT BY 1) ,"+
             "  PTYPE VARCHAR(255) NOT NULL ," +
             "  V0 VARCHAR(255) DEFAULT NULL ," +
             "  V1 VARCHAR(255) DEFAULT NULL ," +
             "  V2 VARCHAR(255) DEFAULT NULL ," +
             "  V3 VARCHAR(255) DEFAULT NULL ," +
             "  V4 VARCHAR(255) DEFAULT NULL ," +
-            "  V5 VARCHAR(255) DEFAULT NULL" +
+            "  V5 VARCHAR(255) DEFAULT NULL ," +
+            "  PRIMARY KEY (ID) " +
             ")";
 
     /**