calcite close connection

[勾王敏浩]

Hi,
I am currently using calcite to access postgre and other relational databases. 
But throws the exception "too many clients". While I have closed the 
calciteConnection after performing the operation. I want to know if the 
connections to the underlying databases have been closed after the connection 
of calcite has been closed. Thank you.


Best，
Wangminhao Gou