spec_sql_list_tables
dbListTables()
returns a character vector
that enumerates all tables
and views
in the database.
Tables added with dbWriteTable()
are part of the list,
including temporary tables if supported by the database.
As soon a table is removed from the database,
it is also removed from the list of database tables.
The returned names are suitable for quoting with dbQuoteIdentifier().
An error is raised when calling this method for a closed
or invalid connection.