Arthur Li

Support micro seconds precisison during copy unload

6

Snowflake connector uses [SimpleDateFormat](https://docs.oracle.com/javase/8/docs/api/java/text/SimpleDateFormat.html) (legacy) for data time parsing during copy unload, internally, it only supports milliseconds. For instance, for string `2023-03-01 07:54:56.191173` it would consider it carries 191173 milliseconds...

Support micro seconds timestamp precision with copy unload

3

Hi folks, due to high NAT gateway cost, we have to use copy load when reading from snowflake, but currently copy unload doesn't support micro second level precision(only at mills)....