table_ref

table_ref 
      ::= 
      table_name [ [ "as" ] correlation_name 
      [ "(" derived_column_list ")" ] ] 
      | derived_table [ "as" ] correlation_name 
      [ "(" derived_column_list ")" ] 
      | joined_table 

This rule is called by

-> cross_join
-> from_clause
-> qualified_join