diff --git a/src/sql/engine/expr/ob_array_expr_utils.cpp b/src/sql/engine/expr/ob_array_expr_utils.cpp
index a759ae6a2d..f1a533bac9 100644
--- a/src/sql/engine/expr/ob_array_expr_utils.cpp
+++ b/src/sql/engine/expr/ob_array_expr_utils.cpp
@@ -462,6 +462,8 @@ int ObArrayExprUtils::deduce_array_element_type(ObExecContext *exec_ctx, ObExprR
   bool is_bigint_signed_exsit = false;
   bool is_all_num_tc = true;
   bool is_all_same_type = true;
+  // scale is zero
+  bool is_all_int_type = true;
   ObObjType last_type = ObNullType;
   int64_t elem_idx = 0;
   for (int64_t i = 0; i < param_num && OB_SUCC(ret); i++) {
@@ -472,6 +474,9 @@ int ObArrayExprUtils::deduce_array_element_type(ObExecContext *exec_ctx, ObExprR
         || types_stack[i].get_type() == ObNumberType
         || types_stack[i].get_type() == ObUNumberType) {
       is_decimal_exist = true;
+      if (types_stack[i].get_scale() != 0) {
+        is_all_int_type = false;
+      }
     }
     if (!ob_is_numeric_tc(types_stack[i].get_type_class()) && !types_stack[i].is_null()) {
       is_all_num_tc = false;
@@ -531,11 +536,12 @@ int ObArrayExprUtils::deduce_array_element_type(ObExecContext *exec_ctx, ObExprR
         }
       }
     } else if (is_decimal_exist) {
-      elem_type.meta_.set_double();
+      is_all_int_type ? elem_type.meta_.set_int() : elem_type.meta_.set_double();
+      ObObjType target_type = is_all_int_type ? ObIntType : ObDoubleType;
       for (int64_t i = 0; i < param_num; i++) {
         if (!types_stack[i].is_null()) {
-          if (types_stack[i].get_type() != ObDoubleType) {
-            types_stack[i].set_calc_type(ObDoubleType);
+          if (types_stack[i].get_type() != target_type) {
+            types_stack[i].set_calc_type(target_type);
           }
         }
       }
diff --git a/src/sql/resolver/cmd/ob_variable_set_resolver.cpp b/src/sql/resolver/cmd/ob_variable_set_resolver.cpp
index bbc3c2920b..95a5998ce4 100644
--- a/src/sql/resolver/cmd/ob_variable_set_resolver.cpp
+++ b/src/sql/resolver/cmd/ob_variable_set_resolver.cpp
@@ -150,6 +150,11 @@ int ObVariableSetResolver::resolve(const ParseNode &parse_tree)
           } else if (T_DEFAULT == set_node->children_[1]->type_) {
             // set 系统变量 = default
             var_node.is_set_default_ = true;
+          } else if (T_FUN_SYS_ARRAY == set_node->children_[1]->type_) {
+            // set 系统变量 = array type isn't supported
+             ret = OB_NOT_SUPPORTED;
+                  LOG_WARN("Variable value type is not supported", K(ret), K(set_node->children_[1]->type_));
+                  LOG_USER_ERROR(OB_NOT_SUPPORTED, "Variable value type");
           } else if (var_node.is_system_variable_) {
             ParseNode value_node;
             if (T_IDENT == set_node->children_[1]->type_) {
diff --git a/src/sql/resolver/ddl/ob_create_index_resolver.cpp b/src/sql/resolver/ddl/ob_create_index_resolver.cpp
index 2d3b0d3bd2..f83ef2ce72 100644
--- a/src/sql/resolver/ddl/ob_create_index_resolver.cpp
+++ b/src/sql/resolver/ddl/ob_create_index_resolver.cpp
@@ -199,8 +199,8 @@ int ObCreateIndexResolver::resolve_index_column_node(
           } else if (OB_NOT_NULL(column_schema = tbl_schema->get_column_schema(sort_item.column_name_))) {
             if (ob_is_collection_sql_type(column_schema->get_data_type()) && index_keyname_ != INDEX_KEYNAME::VEC_KEY) {
               ret = OB_NOT_SUPPORTED;
-              LOG_WARN("not support index create on vector column yet", K(ret));
-              LOG_USER_ERROR(OB_NOT_SUPPORTED, "create index on vector column is");
+              LOG_WARN("not support index type create on vector or array column yet", K(ret), K(index_keyname_));
+              LOG_USER_ERROR(OB_NOT_SUPPORTED, "create index on vector or array column is");
             }
           }
         }