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Commit Graph

83 Commits

Author SHA1 Message Date
b6b71b85bc Pgindent run for 8.0. 2004-08-29 05:07:03 +00:00
da9a8649d8 Update copyright to 2004. 2004-08-29 04:13:13 +00:00
d0b4399d81 Reimplement the linked list data structure used throughout the backend.
In the past, we used a 'Lispy' linked list implementation: a "list" was
merely a pointer to the head node of the list. The problem with that
design is that it makes lappend() and length() linear time. This patch
fixes that problem (and others) by maintaining a count of the list
length and a pointer to the tail node along with each head node pointer.
A "list" is now a pointer to a structure containing some meta-data
about the list; the head and tail pointers in that structure refer
to ListCell structures that maintain the actual linked list of nodes.

The function names of the list API have also been changed to, I hope,
be more logically consistent. By default, the old function names are
still available; they will be disabled-by-default once the rest of
the tree has been updated to use the new API names.
2004-05-26 04:41:50 +00:00
a376a4673a Fix oversight in optimization that avoids an unnecessary projection step
when scanning a table that we need all the columns from.  In case of
SELECT INTO, we have to check that the hasoids flag matches the desired
output type, too.  Per report from Mike Mascari.
2004-01-22 02:23:21 +00:00
969685ad44 $Header: -> $PostgreSQL Changes ... 2003-11-29 19:52:15 +00:00
a039148cad tlist_matches_tupdesc() needs to defend itself against dropped columns. 2003-09-25 19:41:49 +00:00
46785776c4 Another pgindent run with updated typedefs. 2003-08-08 21:42:59 +00:00
870886affe Suppress unused-variable warnings when building without Asserts. 2003-08-08 14:39:45 +00:00
f3c3deb7d0 Update copyrights to 2003. 2003-08-04 02:40:20 +00:00
089003fb46 pgindent run. 2003-08-04 00:43:34 +00:00
4cff59d8d5 Tweak planner and executor to avoid doing ExecProject() in table scan
nodes where it's not really necessary.  In many cases where the scan node
is not the topmost plan node (eg, joins, aggregation), it's possible to
just return the table tuple directly instead of generating an intermediate
projection tuple.  In preliminary testing, this reduced the CPU time
needed for 'SELECT COUNT(*) FROM foo' by about 10%.
2003-02-03 15:07:08 +00:00
1fd0c59e25 Phase 1 of read-only-plans project: cause executor state nodes to point
to plan nodes, not vice-versa.  All executor state nodes now inherit from
struct PlanState.  Copying of plan trees has been simplified by not
storing a list of SubPlans in Plan nodes (eliminating duplicate links).
The executor still needs such a list, but it can build it during
ExecutorStart since it has to scan the plan tree anyway.
No initdb forced since no stored-on-disk structures changed, but you
will need a full recompile because of node-numbering changes.
2002-12-05 15:50:39 +00:00
97ac103289 Remove sys/types.h in files that include postgres.h, and hence c.h,
because c.h has sys/types.h.
2002-09-02 02:47:07 +00:00
d84fe82230 Update copyright to 2002. 2002-06-20 20:29:54 +00:00
3b6cbce458 Add CHECK_FOR_INTERRUPTS() in various strategic spots, per comments
from Hiroshi.
2002-01-06 00:37:44 +00:00
b81844b173 pgindent run on all C files. Java run to follow. initdb/regression
tests pass.
2001-10-25 05:50:21 +00:00
0686d49da0 Remove dashes in comments that don't need them, rewrap with pgindent. 2001-03-22 06:16:21 +00:00
9e1552607a pgindent run. Make it all clean. 2001-03-22 04:01:46 +00:00
623bf843d2 Change Copyright from PostgreSQL, Inc to PostgreSQL Global Development Group. 2001-01-24 19:43:33 +00:00
782c16c6a1 SQL-language functions are now callable in ordinary fmgr contexts ...
for example, an SQL function can be used in a functional index.  (I make
no promises about speed, but it'll work ;-).)  Clean up and simplify
handling of functions returning sets.
2000-08-24 03:29:15 +00:00
bec98a31c5 Revise aggregate functions per earlier discussions in pghackers.
There's now only one transition value and transition function.
NULL handling in aggregates is a lot cleaner.  Also, use Numeric
accumulators instead of integer accumulators for sum/avg on integer
datatypes --- this avoids overflow at the cost of being a little slower.
Implement VARIANCE() and STDDEV() aggregates in the standard backend.

Also, enable new LIKE selectivity estimators by default.  Unrelated
change, but as long as I had to force initdb anyway...
2000-07-17 03:05:41 +00:00
badce86a2c First stage of reclaiming memory in executor by resetting short-term
memory contexts.  Currently, only leaks in expressions executed as
quals or projections are handled.  Clean up some old dead cruft in
executor while at it --- unused fields in state nodes, that sort of thing.
2000-07-12 02:37:39 +00:00
5c25d60244 Add:
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc

to all files copyright Regents of Berkeley.  Man, that's a lot of files.
2000-01-26 05:58:53 +00:00
6d1efd76fb Fix handling of NULL constraint conditions: per SQL92 spec, a NULL result
from a constraint condition does not violate the constraint (cf. discussion
on pghackers 12/9/99).  Implemented by adding a parameter to ExecQual,
specifying whether to return TRUE or FALSE when the qual result is
really NULL in three-valued boolean logic.  Currently, ExecRelCheck is
the only caller that asks for TRUE, but if we find any other places that
have the wrong response to NULL, it'll be easy to fix them.
2000-01-19 23:55:03 +00:00
6724a50787 Change my-function-name-- to my_function_name, and optimizer renames. 1999-02-13 23:22:53 +00:00
fa1a8d6a97 OK, folks, here is the pgindent output. 1998-09-01 04:40:42 +00:00
8749b6c794 execScan.c: in the end of scan projInfo->pi_slot must be
return, not a slot returned from access method (they have
	different TupleDesc and MergeJoin node was broken).
nodeIndexscan.c: index_markpos()/index_restrpos() call index-specific
	mark/restr funcs and are in use now (instead of
	IndexScanMarkPosition()/ExecIndexRestrPos()).
1998-02-26 12:13:11 +00:00
59f6a57e59 Used modified version of indent that understands over 100 typedefs. 1997-09-08 21:56:23 +00:00
319dbfa736 Another PGINDENT run that changes variable indenting and case label indenting. Also static variable indenting. 1997-09-08 02:41:22 +00:00
1ccd423235 Massive commit to run PGINDENT on all *.c and *.h files. 1997-09-07 05:04:48 +00:00
79e78f0b80 Added SCO support, from Daniel Harris. 1997-07-28 00:57:08 +00:00
3df33180a1 add #include "postgres.h", as required by all .c files 1996-10-31 10:12:26 +00:00
d31084e9d1 Postgres95 1.01 Distribution - Virgin Sources 1996-07-09 06:22:35 +00:00