【修复】修复判断resultSet时导致的游标偏离的问题

snowy-plugin/snowy-plugin-gen/src/main/java/vip/xiaonuo/gen/modular/basic/service/impl/GenBasicServiceImpl.java

@@ -329,7 +329,7 @@ public class GenBasicServiceImpl extends ServiceImpl<GenBasicMapper, GenBasic> i
             }
             List<GenBasicTableColumnResult> columns = new ArrayList<>();
             rs = metaData.getColumns(null, schema, genBasicTableColumnParam.getTableName(), "%");
-            if(!rs.next()) {
+            if(!rs.isBeforeFirst()) {
                 rs = metaData.getColumns(null, schema, genBasicTableColumnParam.getTableName().toLowerCase(), "%");
             }
             while (rs.next()) {