diff --git a/headless/chat/src/main/java/com/tencent/supersonic/headless/chat/parser/llm/PromptHelper.java b/headless/chat/src/main/java/com/tencent/supersonic/headless/chat/parser/llm/PromptHelper.java
index 3ad844a361..014fd7ca70 100644
--- a/headless/chat/src/main/java/com/tencent/supersonic/headless/chat/parser/llm/PromptHelper.java
+++ b/headless/chat/src/main/java/com/tencent/supersonic/headless/chat/parser/llm/PromptHelper.java
@@ -114,9 +114,11 @@ public String buildSchemaStr(LLMReq llmReq) {
                                 dimension.getAlias().stream().forEach(a -> alias.append(a + ","));
                                 dimensionStr.append(" ALIAS '" + alias + "'");
                             }
+                            if (StringUtils.isNotEmpty(dimension.getTimeFormat())) {
+                                dimensionStr.append(" FORMAT '" + dimension.getTimeFormat() + "'");
+                            }
                             if (StringUtils.isNotEmpty(dimension.getDescription())) {
-                                dimensionStr.append(
-                                        " COMMENT '" + dimension.getDescription() + "'");
+                                dimensionStr.append(" COMMENT '" + dimension.getDescription() + "'");
                             }
                             dimensionStr.append(">");
                             dimensions.add(dimensionStr.toString());