knngist - 0.8

http://www.sigaev.ru/misc/builtin_knngist_core-0.8.gz
http://www.sigaev.ru/misc/builtin_knngist_itself-0.8.gz
http://www.sigaev.ru/misc/builtin_knngist_proc-0.8.gz
http://www.sigaev.ru/misc/builtin_knngist_contrib_pg_trgm-0.8.gz
http://www.sigaev.ru/misc/builtin_knngist_contrib_btree_gist-0.8.gz

Changes:
* pg_amop has boolean column amoporder which points to clause's usage of  operator
* Syntax of CREATE OPERATOR CLASS     CREATE OPERATOR CLASS ...         [ORDER] OPERATOR ....  ORDER OPERATOR is marked
withpg_amop.amoporder = true
 
* Bool-returning operator could not be used as ORDER OPERATOR, but type of  returning value still should have a default
Btreeoperator class.
 
* Added flag SK_ORDER to SkanKey flag to indicate order operation, so access  methods (only GiST right now) should
checkthis flag (in previous versions of  patch GiST checked returned value of operator's function)
 

-- 
Teodor Sigaev                                   E-mail: teodor@sigaev.ru
  WWW: http://www.sigaev.ru/