char_string_type

char_string_type 
      ::= 
      "character" [ "(" length ")" ] 
      | "char" [ "(" length ")" ] 
      | "character" "varying" "(" length ")" 
      | "char" "varying" "(" length ")" 
      | "varchar" "(" length ")" 

[rule list]
This rule is called by

-> data_type