diff --git a/src/main/java/neatlogic/module/rdm/dao/mapper/ProjectSchemaMapper.xml b/src/main/java/neatlogic/module/rdm/dao/mapper/ProjectSchemaMapper.xml
index 2582a89eda99e75a5518806966a4c13c105f696b..2b2357f048a2cdf69f05c19a7db12f80852d3df5 100644
--- a/src/main/java/neatlogic/module/rdm/dao/mapper/ProjectSchemaMapper.xml
+++ b/src/main/java/neatlogic/module/rdm/dao/mapper/ProjectSchemaMapper.xml
@@ -65,7 +65,8 @@
             <when test="appAttrVo.type == 'number' or appAttrVo.type == 'date' or appAttrVo.type == 'time' or appAttrVo.type == 'datetime' or appAttrVo.type == 'enum'">
                 ,ADD KEY `index_${appAttrVo.id}` (`${appAttrVo.id}`)
             </when>
-            <when test="appAttrVo.type == 'select'">
+
+            <when test="_databaseId == 'mysql' and appAttrVo.type == 'select'">
                 ,ADD KEY `index_${appAttrVo.id}` ((CAST(`${appAttrVo.id}` AS CHAR(255) ARRAY)))
             </when>
         </choose>