分页 count 安全处理

mybatis-plus-extension/src/main/java/com/baomidou/mybatisplus/extension/plugins/inner/PaginationInnerInterceptor.java

@@ -138,8 +138,16 @@ public class PaginationInnerInterceptor implements InnerInterceptor {
         }
 
         CacheKey cacheKey = executor.createCacheKey(countMs, parameter, rowBounds, countSql);
-        Object result = executor.query(countMs, parameter, rowBounds, resultHandler, cacheKey, countSql).get(0);
-        page.setTotal(result == null ? 0L : Long.parseLong(result.toString()));
+        List<Object> result = executor.query(countMs, parameter, rowBounds, resultHandler, cacheKey, countSql);
+        long total = 0;
+        if (CollectionUtils.isNotEmpty(result)) {
+            // 个别数据库 count 没数据不会返回 0
+            Object o = result.get(0);
+            if (o != null) {
+                total = Long.parseLong(o.toString());
+            }
+        }
+        page.setTotal(total);
         return continuePage(page);
     }