diff --git a/src/sql/code_generator/ob_static_engine_cg.cpp b/src/sql/code_generator/ob_static_engine_cg.cpp
index 597d3f6554..03d91ce5a8 100644
--- a/src/sql/code_generator/ob_static_engine_cg.cpp
+++ b/src/sql/code_generator/ob_static_engine_cg.cpp
@@ -380,6 +380,19 @@ int ObStaticEngineCG::postorder_generate_op(ObLogicalOperator &op,
     }
   }
 
+  if (OB_SUCC(ret) && log_op_def::LOG_TABLE_SCAN == op.get_type()
+      && static_cast<ObLogTableScan *>(&op)->get_table_type() == share::schema::EXTERNAL_TABLE) {
+    ObDASScanCtDef &scan_ctdef = static_cast<ObTableScanSpec*>(spec)->tsc_ctdef_.scan_ctdef_;
+    ObExternalFileFormat::FormatType format_type = ObExternalFileFormat::INVALID_FORMAT;
+    if (OB_FAIL(ObSQLUtils::get_external_table_type(scan_ctdef.external_file_format_str_.str_,
+                                                    format_type))) {
+      LOG_WARN("fail to get external table format", K(ret));
+    } else if (ObExternalFileFormat::CSV_FORMAT != format_type && !spec->use_rich_format_) {
+      ret = OB_NOT_SUPPORTED;
+      LOG_USER_ERROR(OB_NOT_SUPPORTED, "Using non-rich vector format in external tables");
+    }
+  }
+
   return ret;
 }