zhwiki recent empty categoty

SQL

CREATE FUNCTION `nsname`(@ns INT)
RETURNS VARCHAR(255)
BEGIN
     SET nsname = ""
     case
          when @ns = 0 then SET nsname = ""
          when @ns = 1 then SET nsname = "Talk:"
          when @ns = 2 then SET nsname = "User:"
          when @ns = 3 then SET nsname = "User talk:"
          when @ns = 4 then SET nsname = "Wikpeida:"
          when @ns = 5 then SET nsname = "Wikpeida talk:"
          when @ns = 6 then SET nsname = "File:"
          when @ns = 7 then SET nsname = "File talk:"
          when @ns = 8 then SET nsname = "Mediawiki:"
          when @ns = 9 then SET nsname = "Mediawiki talk:"
          when @ns = 10 then SET nsname = "Template:"
          when @ns = 11 then SET nsname = "Template talk:"
          when @ns = 12 then SET nsname = "Help:"
          when @ns = 13 then SET nsname = "Help talk:"
          when @ns = 14 then SET nsname = "Category:"
          when @ns = 15 then SET nsname = "Category talk:"
          when @ns = 100 then SET nsname = "Portal:"
          when @ns = 101 then SET nsname = "Portal talk:"
          when @ns = 118 then SET nsname = "Draft:"
          when @ns = 119 then SET nsname = "Draft talk:"
          when @ns = 828 then SET nsname = "Module:"
          when @ns = 829 then SET nsname = "Module talk:"
     end
     RETURN nsname
END
SELECT nsname(1)
SQL

Checking query status...
