Commit Graph

20 Commits

Author SHA1 Message Date
Bruce Momjian
d747140279 8.4 pgindent run, with new combined Linux/FreeBSD/MinGW typedef list
provided by Andrew.
2009-06-11 14:49:15 +00:00
Alvaro Herrera
f8c4d7db60 Restructure some header files a bit, in particular heapam.h, by removing some
unnecessary #include lines in it.  Also, move some tuple routine prototypes and
macros to htup.h, which allows removal of heapam.h inclusion from some .c
files.

For this to work, a new header file access/sysattr.h needed to be created,
initially containing attribute numbers of system columns, for pg_dump usage.

While at it, make contrib ltree, intarray and hstore header files more
consistent with our header style.
2008-05-12 00:00:54 +00:00
Tom Lane
220db7ccd8 Simplify and standardize conversions between TEXT datums and ordinary C
strings.  This patch introduces four support functions cstring_to_text,
cstring_to_text_with_len, text_to_cstring, and text_to_cstring_buffer, and
two macros CStringGetTextDatum and TextDatumGetCString.  A number of
existing macros that provided variants on these themes were removed.

Most of the places that need to make such conversions now require just one
function or macro call, in place of the multiple notational layers that used
to be needed.  There are no longer any direct calls of textout or textin,
and we got most of the places that were using handmade conversions via
memcpy (there may be a few still lurking, though).

This commit doesn't make any serious effort to eliminate transient memory
leaks caused by detoasting toasted text objects before they reach
text_to_cstring.  We changed PG_GETARG_TEXT_P to PG_GETARG_TEXT_PP in a few
places where it was easy, but much more could be done.

Brendan Jurd and Tom Lane
2008-03-25 22:42:46 +00:00
Tom Lane
f4230d2937 Change patternsel() so that instead of switching from a pure
pattern-examination heuristic method to purely histogram-driven selectivity at
histogram size 100, we compute both estimates and use a weighted average.
The weight put on the heuristic estimate decreases linearly with histogram
size, dropping to zero for 100 or more histogram entries.
Likewise in ltreeparentsel().  After a patch by Greg Stark, though I
reorganized the logic a bit to give the caller of histogram_selectivity()
more control.
2008-03-09 00:32:09 +00:00
Tom Lane
9f652d430f Fix up several contrib modules that were using varlena datatypes in 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.
2007-02-28 22:44:38 +00:00
Tom Lane
234a02b2a8 Replace direct assignments to VARATT_SIZEP(x) with SET_VARSIZE(x, len).
Get rid of VARATT_SIZE and VARATT_DATA, which were simply redundant with
VARSIZE and VARDATA, and as a consequence almost no code was using the
longer names.  Rename the length fields of struct varlena and various
derived structures to catch anyplace that was accessing them directly;
and clean up various places so caught.  In itself this patch doesn't
change any behavior at all, but it is necessary infrastructure if we hope
to play any games with the representation of varlena headers.
Greg Stark and Tom Lane
2007-02-27 23:48:10 +00:00
Bruce Momjian
f99a569a2e pgindent run for 8.2. 2006-10-04 00:30:14 +00:00
Tom Lane
bfd1ffa948 Change patternsel (LIKE/regex selectivity estimation) so that if there
is a large enough histogram, it will use the number of matches in the
histogram to derive a selectivity estimate, rather than the admittedly
pretty bogus heuristics involving examining the pattern contents.  I set
'large enough' at 100, but perhaps we should change that later.  Also
apply the same technique in contrib/ltree's <@ and @> estimator.  Per
discussion with Stefan Kaltenbrunner and Matteo Beccati.
2006-09-20 19:50:21 +00:00
Tom Lane
a0ffab351e Magic blocks don't do us any good unless we use 'em ... so install one
in every shared library.
2006-05-30 22:12:16 +00:00
Tom Lane
4ade4fe422 Fix ltreeparentsel so it actually works ... 2006-04-27 18:24:35 +00:00
Bruce Momjian
59d61409cd Move ltree parentsel() selectivity function into /contrib/ltree. 2006-04-26 22:33:36 +00:00
Bruce Momjian
f3d99d160d Add CVS tag lines to files that were lacking them. 2006-03-11 04:38:42 +00:00
Tom Lane
380bd04c16 Standardize on using the Min, Max, and Abs macros that are in our c.h file,
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.
2004-10-21 19:28:36 +00:00
Bruce Momjian
089003fb46 pgindent run. 2003-08-04 00:43:34 +00:00
Tom Lane
8fd5b3ed67 Error message editing in contrib (mostly by Joe Conway --- thanks Joe!) 2003-07-24 17:52:50 +00:00
Teodor Sigaev
2c914937c1 Fix subpath and subltree. Allow to return '' value.
subpath(ltree,0,0) returns ''.
2003-07-18 13:27:43 +00:00
Bruce Momjian
baf6c8d21d Please, apply patch for contrib/ltree to current CVS and 7.3.2
CHANGES

Mar 28, 2003
    Added finctions index(ltree,ltree,offset), text2ltree(text),
                    ltree2text(text)

Teodor Sigaev
2003-03-31 20:53:45 +00:00
Bruce Momjian
e50f52a074 pgindent run. 2002-09-04 20:31:48 +00:00
Bruce Momjian
978c8c6d2f please find attached patch to current CVS ( contrib/ltree )
Changes:

July 31, 2002
   Now works on 64-bit platforms.
   Added function lca - lowest common ancestor
   Version for 7.2 is distributed as separate package -
   http://www.sai.msu.su/~megera/postgres/gist/ltree/ltree-7.2.tar.gz

Oleg Bartunov
2002-08-04 05:02:50 +00:00
Bruce Momjian
1dedbf2da5 Add ltree data type to contrib, from Teodor Sigaev and Oleg Bartunov. 2002-07-30 16:40:34 +00:00