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compatibility package. This supports importing dumps from past versions
using tsearch2, and provides the old names and API for most functions
that were changed. (rewrite(ARRAY[...]) is a glaring omission, though.)
Pavel Stehule and Tom Lane
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not-so-obvious
ways. I'm not totally sure that I caught everything, but at least now they pass
their regression tests with VARSIZE/SET_VARSIZE defined to reverse byte order.
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* new split algorithm (as proposed in http://archives.postgresql.org/pgsql-hackers/2006-06/msg00254.php)
* possible call pickSplit() for second and below columns
* add spl_(l|r)datum_exists to GIST_SPLITVEC -
pickSplit should check its values to use already defined
spl_(l|r)datum for splitting. pickSplit should set
spl_(l|r)datum_exists to 'false' (if they was 'true') to
signal to caller about using spl_(l|r)datum.
* support for old pickSplit(): not very optimal
but correct split
* remove 'bytes' field from GISTENTRY: in any case size of
value is defined by it's type.
* split GIST_SPLITVEC to two structures: one for using in picksplit
and second - for internal use.
* some code refactoring
* support of subsplit to rtree opclasses
TODO: add support of subsplit to contrib modules
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sizebitvec of tsearch2, as well as identical code in several other
contrib modules. This provided about a 20X speedup in building a
large tsearch2 index ... didn't try to measure its effects for other
operations. Thanks to Stephan Vollmer for providing a test case.
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methods in a short-lived memory context, there is no need for GiST methods
to do their own manual (and error-prone) memory management.
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2 implement gtsvector_out for use with gevel module (debug GiST indexes, http://www.sai.msu.su/~megera/postgres/gist/gevel/)
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getting rid of numerous ad-hoc versions that have popped up in various
places. Shortens code and avoids conflict with Windows min() and max()
macros.
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boxes. Change interface to user-defined GiST support methods union and
picksplit. Now instead of bytea struct it used special GistEntryVector
structure.
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