Index: doc/src/sgml/mvcc.sgml
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RCS file: /projects/cvsroot/pgsql/doc/src/sgml/mvcc.sgml,v
retrieving revision 2.57
diff -c -r2.57 mvcc.sgml
*** doc/src/sgml/mvcc.sgml 25 Aug 2006 04:06:45 -0000 2.57
--- doc/src/sgml/mvcc.sgml 1 Sep 2006 17:28:28 -0000
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*** 471,477 ****
result in problems. (Certainly the example above is rather contrived
and unlikely to represent real software.) Accordingly,
PostgreSQL does not implement predicate
! locking, and so far as we are aware no other production DBMS does either.
--- 471,480 ----
result in problems. (Certainly the example above is rather contrived
and unlikely to represent real software.) Accordingly,
PostgreSQL does not implement predicate
! locking. No system based on next-key locking implements it
! either because next-key locking only helps when all your
! predicates are point or range searches against an available
! B-tree index. DB2, however, does implement predicate locking.