pgsql-server/src backend/access/nbtree/Makefil ...

CVSROOT:    /cvsroot
Module name:    pgsql-server
Changes by:    tgl@postgresql.org    03/02/20 19:06:22

Modified files:
    src/backend/access/nbtree: Makefile README nbtinsert.c nbtpage.c
                               nbtree.c nbtsearch.c nbtsort.c
    src/backend/access/transam: rmgr.c xlog.c
    src/include/access: nbtree.h xlog.h
    src/include/catalog: catversion.h
Added files:
    src/backend/access/nbtree: nbtxlog.c

Log message:
    Make btree index structure adjustments and WAL logging changes needed to
    support btree compaction, as per proposal of a few days ago.  btree index
    pages no longer store parent links, instead they have a level indicator
    (counting up from zero for leaf pages).  The FixBTree recovery logic is
    removed, and replaced by code that detects missing parent-level insertions
    during WAL replay.  Also, generate appropriate WAL entries when updating
    btree metapage and when building a btree index from scratch.  I believe
    btree indexes are now completely WAL-legal for the first time.
    initdb forced due to index and WAL changes.