pg数据库使用insertorupdate的mergeinto语法异常

数据库定义的字段类型为date，c#定义为DateTime，生成的sql为：
MERGE INTO "info" t1 USING (
SELECT
'a0f77f87-67fa-4d56-bd4c-8e8cbad9ddf6' AS "id",
'2025-10-07 00:00:00.000000' AS "birth_day") t2 ON (t1."id" = t2."id")
WHEN MATCHED THEN
UPDATE
SET
"birth_day" = t2."birth_day"
WHEN NOT MATCHED THEN
INSERT ("id", "birth_day")
VALUES
(
t2."id",
t2."birth_day");
执行会报错：
错误: 字段 "birth_day" 的类型为 date, 但表达式的类型为 text
"birth_day" = t2."birth_day",
^
HINT: 你需要重写或转换表达式