diff --git a/be/src/vec/functions/function_timestamp.cpp b/be/src/vec/functions/function_timestamp.cpp
index c2285795c7..483f8cf992 100644
--- a/be/src/vec/functions/function_timestamp.cpp
+++ b/be/src/vec/functions/function_timestamp.cpp
@@ -831,7 +831,7 @@ struct UnixTimeStampStrImpl {
         std::tie(col_right, format_const) =
                 unpack_if_const(block.get_by_position(arguments[1]).column);
 
-        auto col_result = ColumnDecimal<Decimal64>::create(input_rows_count, 0);
+        auto col_result = ColumnDecimal<Decimal64>::create(input_rows_count, 6);
         auto null_map = ColumnVector<UInt8>::create(input_rows_count);
         auto& col_result_data = col_result->get_data();
         auto& null_map_data = null_map->get_data();
diff --git a/regression-test/data/query_p0/sql_functions/datetime_functions/test_date_function.out b/regression-test/data/query_p0/sql_functions/datetime_functions/test_date_function.out
index ecf83359db..c05fb8ef53 100644
--- a/regression-test/data/query_p0/sql_functions/datetime_functions/test_date_function.out
+++ b/regression-test/data/query_p0/sql_functions/datetime_functions/test_date_function.out
@@ -380,6 +380,9 @@ February
 -- !sql_ustamp7 --
 1196389819.1235
 
+-- !sql_ustamp8 --
+1704038400
+
 -- !sql --
 0
 
diff --git a/regression-test/suites/query_p0/sql_functions/datetime_functions/test_date_function.groovy b/regression-test/suites/query_p0/sql_functions/datetime_functions/test_date_function.groovy
index 49db2bb4c8..fd504f0be9 100644
--- a/regression-test/suites/query_p0/sql_functions/datetime_functions/test_date_function.groovy
+++ b/regression-test/suites/query_p0/sql_functions/datetime_functions/test_date_function.groovy
@@ -441,6 +441,7 @@ suite("test_date_function") {
     // UNIX_TIMESTAMP
     def unin_timestamp_str = """ select unix_timestamp() """
     assertTrue(unin_timestamp_str[0].size() == 1)
+
     qt_sql_ustamp1 """ select unix_timestamp('2007-11-30 10:30:19') """
     qt_sql_ustamp2 """ select unix_timestamp('2007-11-30 10:30-19', '%Y-%m-%d %H:%i-%s') """
     qt_sql_ustamp3 """ select unix_timestamp('2007-11-30 10:30%3A19', '%Y-%m-%d %H:%i%%3A%s') """
@@ -448,6 +449,7 @@ suite("test_date_function") {
     qt_sql_ustamp5 """ select unix_timestamp('2007-11-30 10:30:19.123456') """
     qt_sql_ustamp6 """ select unix_timestamp(cast('2007-11-30 10:30:19.123456' as datetimev2(3))) """
     qt_sql_ustamp7 """ select unix_timestamp(cast('2007-11-30 10:30:19.123456' as datetimev2(4))) """
+    qt_sql_ustamp8 """ select cast(unix_timestamp("2024-01-01",'yyyy-MM-dd') as bigint) """
 
     // UTC_TIMESTAMP
     def utc_timestamp_str = sql """ select utc_timestamp(),utc_timestamp() + 1 """