postgres

Commit Graph

Author	SHA1	Message	Date
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.	18 years ago
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	18 years ago
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.	18 years ago
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.	19 years ago
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	19 years ago
Bruce Momjian	f99a569a2e	pgindent run for 8.2.	20 years ago
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.	20 years ago
Tom Lane	a0ffab351e	Magic blocks don't do us any good unless we use 'em ... so install one in every shared library.	20 years ago
Tom Lane	4ade4fe422	Fix ltreeparentsel so it actually works ...	20 years ago
Bruce Momjian	59d61409cd	Move ltree parentsel() selectivity function into /contrib/ltree.	20 years ago
Bruce Momjian	f3d99d160d	Add CVS tag lines to files that were lacking them.	20 years ago
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.	21 years ago
Bruce Momjian	089003fb46	pgindent run.	23 years ago
Tom Lane	8fd5b3ed67	Error message editing in contrib (mostly by Joe Conway --- thanks Joe!)	23 years ago
Teodor Sigaev	2c914937c1	Fix subpath and subltree. Allow to return '' value. subpath(ltree,0,0) returns ''.	23 years ago
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	23 years ago
Bruce Momjian	e50f52a074	pgindent run.	24 years ago
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	24 years ago
Bruce Momjian	1dedbf2da5	Add ltree data type to contrib, from Teodor Sigaev and Oleg Bartunov.	24 years ago

19 Commits (99b8ebec645cdb7ddb0b51a6772ab76c8dd974c6)