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Tom Lane a0185461dd Rearrange the implementation of index-only scans. ... This commit changes index-only scans so that data is read directly from the index tuple without first generating a faux heap tuple. The only immediate benefit is that indexes on system columns (such as OID) can be used in index-only scans, but this is necessary infrastructure if we are ever to support index-only scans on expression indexes. The executor is now ready for that, though the planner still needs substantial work to recognize the possibility. To do this, Vars in index-only plan nodes have to refer to index columns not heap columns. I introduced a new special varno, INDEX_VAR, to mark such Vars to avoid confusion. (In passing, this commit renames the two existing special varnos to OUTER_VAR and INNER_VAR.) This allows ruleutils.c to handle them with logic similar to what we use for subplan reference Vars. Since index-only scans are now fundamentally different from regular indexscans so far as their expression subtrees are concerned, I also chose to change them to have their own plan node type (and hence, their own executor source file).		14 years ago
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access	Improve index-only scans to avoid repeated access to the index page.	14 years ago
bootstrap	Stamp copyrights for year 2011.	15 years ago
catalog	Support index-only scans using the visibility map to avoid heap fetches.	14 years ago
commands	Redesign the plancache mechanism for more flexibility and efficiency.	14 years ago
datatype	Move Timestamp/Interval typedefs and basic macros into datatype/timestamp.h.	15 years ago
executor	Rearrange the implementation of index-only scans.	14 years ago
foreign	pgindent run before PG 9.1 beta 1.	15 years ago
lib	Add missing format attributes	15 years ago
libpq	Move Timestamp/Interval typedefs and basic macros into datatype/timestamp.h.	15 years ago
mb	Fix char2wchar/wchar2char to support collations properly.	15 years ago
nodes	Rearrange the implementation of index-only scans.	14 years ago
optimizer	Support index-only scans using the visibility map to avoid heap fetches.	14 years ago
parser	Add notion of a "transform function" that can simplify function calls.	15 years ago
port	Revert "Force use of "%I64d" format for 64 bit ints on MinGW."	15 years ago
portability	Stamp copyrights for year 2011.	15 years ago
postmaster	Remove unnecessary #include references, per pgrminclude script.	15 years ago
regex	Teach regular expression operators to honor collations.	15 years ago
replication	Split walsender.h in public/private headers	14 years ago
rewrite	Try to acquire relation locks in RangeVarGetRelid.	15 years ago
snowball	Add markers for skips.	15 years ago
storage	Fix typo.	14 years ago
tcop	Clean up the #include mess a little.	15 years ago
tsearch	Remove unnecessary #include references, per pgrminclude script.	15 years ago
utils	Improve and simplify CREATE EXTENSION's management of GUC variables.	14 years ago
.gitignore	Convert cvsignore to gitignore, and add .gitignore for build targets.	15 years ago
Makefile	Add datatype directory to SUBDIRS.	15 years ago
c.h	Use a macro variable PG_PRINTF_ATTRIBUTE for the style used for checking printf type functions.	15 years ago
fmgr.h	Pgindent run before 9.1 beta2.	15 years ago
funcapi.h	Stamp copyrights for year 2011.	15 years ago
getaddrinfo.h	Stamp copyrights for year 2011.	15 years ago
getopt_long.h	Stamp copyrights for year 2011.	15 years ago
miscadmin.h	Add postmaster/postgres undocumented -b option for binary upgrades.	15 years ago
pg_config.h.in	Make pgbench use erand48() rather than random().	15 years ago
pg_config.h.win32	Correct the lie in pg_config.h.win32 about having inttypes.h.	15 years ago
pg_config_manual.h	Revert accidental change to pg_config_manual.h.	14 years ago
pg_trace.h	Add markers.	15 years ago
pgstat.h	Move Timestamp/Interval typedefs and basic macros into datatype/timestamp.h.	15 years ago
pgtime.h	Simplify handling of the timezone GUC by making initdb choose the default.	15 years ago
port.h	setlocale() on Windows doesn't work correctly if the locale name contains	15 years ago
postgres.h	Stamp copyrights for year 2011.	15 years ago
postgres_ext.h	Remove cvs keywords from all files.	15 years ago
postgres_fe.h	Stamp copyrights for year 2011.	15 years ago
rusagestub.h	Stamp copyrights for year 2011.	15 years ago
windowapi.h	Stamp copyrights for year 2011.	15 years ago