增加datetime 到 date的转换

[louieli]

add datetime to date cast
example:
42 # MySQL data source
43 [[source]]
44 schema = "db_xguard_websvr"
45 tables = ["t_app_data"]
46
47 [[rule]]
48 schema = "db_xguard_websvr"
49 table = "t_app_data"
50 index = "db_xguard_websvr"
51 type = "t_app_data"
52
53 filter = ["ins_id","module_id","item_key","item_val","item_time"]
54
55 [rule.field]
56 item_time="@timestamp,datetime"

[siddontang]

Thanks @louieli

Can you add a test for it?

[siddontang]

Any update? @louieli

[xbloom]

this pr miss update case. In line 401, there also need add fieldType condition logic.

[siddontang]

I guess #143 supports this feature too, can we close it now? @louieli

[louieli]

see #143