TIMESTAMPADD(SQL_TSI_FRAC_SECOND) should be nanoseconds not microseconds

When calling TIMESTAMPADD with the first parameter SQL_TSI_FRAC_SECOND and the JDBC escape sequence, this gets interpreted as microseconds when it should be interpreted as nanoseconds.

From the ODBC spec on MSDN:

https://docs.microsoft.com/en-us/sql/odbc/reference/appendixes/time-date-and-interval-functions?view=sql-server-2017

'where fractional seconds are expressed in billionths of a second.'