[SQL] missing... at end of sql expression

[Justine . Cleary]

I am trying to learn pspgsql but I am not having a lot of luck.   I have written a function but I keep getting the error missing... at end of sql _expression_. Can anyone help!     CREATE FUNCTION exp101 () RETURNS text AS '   DECLARE                -- Declare a variable to hold book titles and set its default      --  value to a new line.     text_output TEXT :=''\n'';           -- Declare a variable to hold rows from the      -- books table.     --row_data enrollment%ROWTYPE;     --row_dataa student%ROWTYPE;     BEGIN        -- Iterate through the results of a query.     FOR row_data IN select *  from enrollment, student where enrollment.stdid = cast(student.stdid as char(4))   Loop              FOR row_dataa IN select student.stdid , student.lname , student.fname ,student.mi, student.phone , student.major, advisor.lname, advisor.fname, advisor.mi from student, enrollment, advisor where enrollment.stdid = cast(student.stdid as char(4)) and student.advid = advisor.advid and enrollment.crs = row_data.crs  order by student.lname, student.fname, student.mi     Loop                 -- Insert the title of a matching book into the text_output variable.       text_output := text_output || row_data.crs ||''\n'';         END LOOP; end loop;         -- Return the list of books.     RETURN text_output;   END; ' LANGUAGE 'plpgsql';