MySQL 数据库不支持 CAST AS DOUBLE，需要改成 CAST AS DECIMAL

modules/i3plus-pojo-base/src/main/java/cn/estsh/i3plus/pojo/base/tool/DdlPreparedPack.java

@@ -636,7 +636,7 @@ public class DdlPreparedPack {
         if (basisType == CommonEnumUtil.BASIS_TYPE.INT.getValue()) {
             name = " cast(" + name + " as integer)";
         } else if (basisType == CommonEnumUtil.BASIS_TYPE.DOUBLE.getValue()) {
-            name = " cast(" + name + " as double)";
+            name = " cast(" + name + " as decimal)";
         } else if (basisType == CommonEnumUtil.BASIS_TYPE.LONG.getValue()) {
             name = " cast(" + name + " as long)";
         }