Howard Chu authored 12 years ago and Quanah Gibson-Mount committed 11 years ago

Fix commit e5b96f2c

mdb_dbi_close() must allow any dbi < maxdbs, since opens in an
uncommitted txn don't increment env->me_numdbs.

This reverts commit 8eef7a42.
Previous commit was correct, duplicate keys should not appear here.

Check for overflow pages, reset cursor position properly.

In APPEND don't immediately reject matching key, since this
is valid for APPENDDUP.

Append mode should *reject* keys that are too small.
Also allow APPENDDUP in mdb_put().

When fixing other cursors, must also fix their depth.

Make sure C_INITIALIZED gets set on successful call

Variables mdb_debug, mdb_debug_start were used undefined.

If the variable dkey.mv_size is non-zero, then it means dkey
contains some original data which has to be put back in the
child db, typically when the child db has just been created.

But when using MDB_MULTIPLE, if this variable has not been
reset to zero, we may come back to this section and wrongly
think that there is some original data to be taken care of.