Session information

Functions providing information about the query execution environment.

current_user

Function	Description	Return Value
current_user	Returns the current user running the query.	User Name

current_groups()

Function	Description	Return Value
current_groups()	Returns the list of groups for the current user running the query.	List of Groups

current_catalog

Function	Description	Return Value
current_catalog	Returns a character string representing the current catalog name.	Catalog Name

currrent_schema

Function	Description	Return Value
current_schema	Returns a character string representing the current unqualified schema name.	Schema Name

Note: This is part of the SQL standard and does not use parenthesis.