Tom Lane 6a6522529f Fix some planner issues found while investigating Kevin Grittner's report ... of poorer planning in 8.3 than 8.2: 1. After pushing a constant across an outer join --- ie, given "a LEFT JOIN b ON (a.x = b.y) WHERE a.x = 42", we can deduce that b.y is sort of equal to 42, in the sense that we needn't fetch any b rows where it isn't 42 --- loop to see if any additional deductions can be made. Previous releases did that by recursing, but I had mistakenly thought that this was no longer necessary given the EquivalenceClass machinery. 2. Allow pushing constants across outer join conditions even if the condition is outerjoin_delayed due to a lower outer join. This is safe as long as the condition is strict and we re-test it at the upper join. 3. Keep the outer-join clause even if we successfully push a constant across it. This is *necessary* in the outerjoin_delayed case, but even in the simple case, it seems better to do this to ensure that the join search order heuristics will consider the join as reasonable to make. Mark such a clause as having selectivity 1.0, though, since it's not going to eliminate very many rows after application of the constant condition. 4. Tweak have_relevant_eclass_joinclause to report that two relations are joinable when they have vars that are equated to the same constant. We won't actually generate any joinclause from such an EquivalenceClass, but again it seems that in such a case it's a good idea to consider the join as worth costing out. 5. Fix a bug in select_mergejoin_clauses that was exposed by these changes: we have to reject candidate mergejoin clauses if either side was equated to a constant, because we can't construct a canonical pathkey list for such a clause. This is an implementation restriction that might be worth fixing someday, but it doesn't seem critical to get it done for 8.3.		2008-01-09 20:42:29 +00:00
..
abstime.sql	Add a "USING" clause to DELETE, which is equivalent to the FROM clause	2005-04-07 01:51:41 +00:00
aggregates.sql	SQL2003-standard statistical aggregates, by Sergey Koposov. I've added only	2006-07-28 18:33:04 +00:00
alter_table.sql	Fix up foreign-key mechanism so that there is a sound semantic basis for the	2007-02-14 01:58:58 +00:00
arrays.sql	Fix the problem that creating a user-defined type named _foo, followed by one	2007-05-12 00:55:00 +00:00
bit.sql	Make bit and bit varying types reject too long input. (They already tried	2001-05-22 16:37:17 +00:00
boolean.sql	Allow leading and trailing whitespace in the input to the boolean	2007-06-01 23:40:19 +00:00
box.sql	Rename contains/contained-by operators to @> and <@, per discussion that	2006-09-10 00:29:35 +00:00
btree_index.sql	Clean up header for uniform appearance throughout tests.	2000-01-06 06:41:55 +00:00
case.sql	Adjust constant-folding of CASE expressions so that the simple comparison	2005-02-02 21:49:09 +00:00
char.sql	Add a "USING" clause to DELETE, which is equivalent to the FROM clause	2005-04-07 01:51:41 +00:00
circle.sql	Support ORDER BY ... NULLS FIRST/LAST, and add ASC/DESC/NULLS FIRST/NULLS LAST	2007-01-09 02:14:16 +00:00
cluster.sql	Add an ORDER BY to nail down the expected row order from a query that's	2007-09-03 01:28:40 +00:00
combocid.sql	Avoid incrementing the CommandCounter when CommandCounterIncrement is called	2007-11-30 21:22:54 +00:00
comments.sql	Implement nested block comments in the backend and in psql.	2000-07-14 15:43:57 +00:00
conversion.sql	Remove "convert 'blah' using conversion_name" facility, because if it	2007-09-24 01:29:30 +00:00
copy2.sql	Clean up CREATE FUNCTION syntax usage in contrib and elsewhere, in	2006-02-27 16:09:50 +00:00
copyselect.sql	Extend COPY to support COPY (SELECT ...) TO ...	2006-08-30 23:34:22 +00:00
create_aggregate.sql	Create AVG() aggregates for int8 and NUMERIC which do not compute X^2,	2007-02-17 00:55:58 +00:00
create_index.sql	Make 'col IS NULL' clauses be indexable conditions.	2007-04-06 22:33:43 +00:00
create_misc.sql	Add a "USING" clause to DELETE, which is equivalent to the FROM clause	2005-04-07 01:51:41 +00:00
create_operator.sql	Attached is a patch implementing factorial(), returning numeric. Points	2003-12-01 21:52:38 +00:00
create_table.sql	Tsearch2 functionality migrates to core. The bulk of this work is by	2007-08-21 01:11:32 +00:00
create_type.sql	Support type modifiers for user-defined types, and pull most knowledge	2006-12-30 21:21:56 +00:00
create_view.sql	Add a "USING" clause to DELETE, which is equivalent to the FROM clause	2005-04-07 01:51:41 +00:00
date.sql	> After all that about numbering centuries and millenia correctly,	2004-08-20 03:45:14 +00:00
delete.sql	Allow an optional alias for the target table to be specified for UPDATE	2006-01-22 05:20:35 +00:00
dependency.sql	Fix all known problems with pg_dump's handling of serial sequences	2006-08-21 00:57:26 +00:00
domain.sql	Fix select_common_type() so that it can select a domain type, if all inputs	2007-11-26 16:46:51 +00:00
drop_if_exists.sql	DROP IF EXISTS for ROLE/USER/GROUP	2006-02-04 19:06:47 +00:00
drop.sql	Add a bunch of pseudo-types to replace the behavior formerly associated	2002-08-22 00:01:51 +00:00
enum.sql	Support enum data types. Along the way, use macros for the values of	2007-04-02 03:49:42 +00:00
errors.sql	Add a regression test to verify that the stack depth checker actually	2005-02-11 22:15:12 +00:00
euc_cn.sql	Hi, here are the patches to enhance existing MB handling. This time	1998-06-16 07:29:54 +00:00
euc_jp.sql	From: t-ishii@sra.co.jp	1998-04-27 17:10:50 +00:00
euc_kr.sql	Hi, here are the patches to enhance existing MB handling. This time	1998-06-16 07:29:54 +00:00
euc_tw.sql	Add missing mb files.	1999-02-02 19:04:43 +00:00
float4.sql	Fix float4/8 to handle Infinity and Nan consistently, e.g. Infinity is a	2007-01-02 20:00:50 +00:00
float8.sql	Remove grammar productions for prefix and postfix % and ^ operators,	2005-06-08 21:15:29 +00:00
foreign_key.sql	Repair problems occurring when multiple RI updates have to be done to the same	2007-08-15 19:15:47 +00:00
geometry.sql	Stop a few regression tests from needlessly disabling GEQO. This was	2007-05-29 04:17:08 +00:00
guc.sql	Arrange for SET LOCAL's effects to persist until the end of the current top	2007-09-11 00:06:42 +00:00
hash_index.sql	Add a "USING" clause to DELETE, which is equivalent to the FROM clause	2005-04-07 01:51:41 +00:00
horology.sql	Adjust horology test to avoid join-plan-dependent result ordering in	2007-07-25 17:22:37 +00:00
inet.sql	Fix incorrect addition, subtraction, and overflow checking in new	2006-02-11 20:39:59 +00:00
inherit.sql	Implement CREATE TABLE LIKE ... INCLUDING INDEXES. Patch from NikhilS,	2007-07-17 05:02:03 +00:00
insert.sql	A few regression tests for VALUES, from Gavin Sherry.	2006-08-03 14:54:44 +00:00
int2.sql	Add a "USING" clause to DELETE, which is equivalent to the FROM clause	2005-04-07 01:51:41 +00:00
int4.sql	Add a "USING" clause to DELETE, which is equivalent to the FROM clause	2005-04-07 01:51:41 +00:00
int8.sql	Add regression test to see if the min/max values of int8 convert correctly.	2005-12-05 04:13:38 +00:00
interval.sql	Fix a bug in input processing for the "interval" type. Previously,	2007-05-29 04:58:43 +00:00
join.sql	Fix some planner issues found while investigating Kevin Grittner's report	2008-01-09 20:42:29 +00:00
limit.sql	Fix parameter recalculation for Limit nodes: during a ReScan call we must	2007-05-17 19:35:08 +00:00
lseg.sql	Clean up format of tests.	2000-01-05 06:07:58 +00:00
money.sql	Add regression tests for MONEY type.	2007-11-24 19:49:23 +00:00
mule_internal.sql	Hi, here are the patches to enhance existing MB handling. This time	1998-06-16 07:29:54 +00:00
name.sql	Add a "USING" clause to DELETE, which is equivalent to the FROM clause	2005-04-07 01:51:41 +00:00
namespace.sql	Add CREATE TRIGGER, CREATE INDEX, and CREATE SEQUENCE to the list of	2004-01-11 04:58:17 +00:00
numeric_big.sql	Update numeric_big regress test for 7.0. This has apparently been	2000-03-30 07:13:20 +00:00
numeric.sql	Tweak the width_bucket() regression tests to avoid an unnecessary	2007-01-17 16:19:08 +00:00
numerology.sql	Tweak GROUP BY so that it will still accept result-column names, but only	2000-03-15 23:31:19 +00:00
oid.sql	Add a "USING" clause to DELETE, which is equivalent to the FROM clause	2005-04-07 01:51:41 +00:00
oidjoins.sql	Tsearch2 functionality migrates to core. The bulk of this work is by	2007-08-21 01:11:32 +00:00
opr_sanity.sql	Make casts from xml to text independent of the XML option setting, thus	2007-11-27 12:21:05 +00:00
path.sql	Clean up format of tests.	2000-01-05 06:07:58 +00:00
plancache.sql	Repair bug that allowed RevalidateCachedPlan to attempt to rebuild a cached	2007-11-30 18:38:34 +00:00
plpgsql.sql	Implement RETURN QUERY for PL/PgSQL. This provides some convenient syntax	2007-07-25 04:19:09 +00:00
point.sql	Stop a few regression tests from needlessly disabling GEQO. This was	2007-05-29 04:17:08 +00:00
polygon.sql	Rename contains/contained-by operators to @> and <@, per discussion that	2006-09-10 00:29:35 +00:00
polymorphism.sql	Fix a thinko in my patch of a couple months ago for bug #3116: it did the	2007-05-01 18:53:52 +00:00
portals_p2.sql	Partial indexes work again, courtesy of Martijn van Oosterhout.	2001-07-16 05:07:00 +00:00
portals.sql	Disallow scrolling of FOR UPDATE/FOR SHARE cursors, so as to avoid problems	2007-10-24 23:27:08 +00:00
prepare.sql	Insert ORDER BY into a few regression test queries that now have unstable	2007-06-09 17:24:46 +00:00
prepared_xacts.sql	Two-phase commit. Original patch by Heikki Linnakangas, with additional	2005-06-17 22:32:51 +00:00
privileges.sql	Get rid of the separate RULE privilege for tables: now only a table's owner	2006-09-05 21:08:36 +00:00
random.sql	Improve random regression tests to fail less frequently.	2004-03-15 15:46:25 +00:00
rangefuncs.sql	Clean up CREATE FUNCTION syntax usage in contrib and elsewhere, in	2006-02-27 16:09:50 +00:00
reltime.sql	Add a "USING" clause to DELETE, which is equivalent to the FROM clause	2005-04-07 01:51:41 +00:00
returning.sql	Apply a simple solution to the problem of making INSERT/UPDATE/DELETE	2006-09-02 17:06:52 +00:00
rowtypes.sql	Support varlena fields with single-byte headers and unaligned storage.	2007-04-06 04:21:44 +00:00
rules.sql	Repair two constraint-exclusion corner cases triggered by proving that an	2007-05-26 18:23:02 +00:00
sanity_check.sql	Tweak sanity_check regression test to display more tables (viz, those	2006-08-06 04:35:21 +00:00
select_distinct_on.sql	Redesign DISTINCT ON as discussed in pgsql-sql 1/25/00: syntax is now	2000-01-27 18:11:50 +00:00
select_distinct.sql	Implement IS NOT DISTINCT FROM, update the regression tests and docs.	2005-12-11 10:54:28 +00:00
select_having.sql	Make the behavior of HAVING without GROUP BY conform to the SQL spec.	2005-03-10 23:21:26 +00:00
select_implicit.sql	Finish implementation of hashed aggregation. Add enable_hashagg GUC	2002-11-21 00:42:20 +00:00
select_into.sql	Remove FROM warning by fixing query.	2000-06-04 17:52:54 +00:00
select_views.sql	Clean up header for uniform appearance throughout tests.	2000-01-06 06:41:55 +00:00
select.sql	Fix a couple of planner bugs introduced by the new ability to discard	2007-07-07 20:46:45 +00:00
sequence.sql	Change nextval and other sequence functions to specify their sequence	2005-10-02 23:50:16 +00:00
sql_ascii.sql	Add SQL_ASCII encoding test case	2000-03-06 01:29:54 +00:00
stats.sql	Simplify and rename some GUC variables, per various recent discussions:	2007-09-24 03:12:23 +00:00
strings.sql	Code review for regexp_matches/regexp_split patch. Refactor to avoid assuming	2007-08-11 03:56:24 +00:00
subselect.sql	Fix an old thinko in SS_make_initplan_from_plan, which is used when optimizing	2007-07-18 21:40:57 +00:00
temp.sql	Support explicit placement of the temporary-table schema within search_path.	2007-04-20 02:37:38 +00:00
text.sql	Fix up text concatenation so that it accepts all the reasonable cases that	2007-06-06 23:00:50 +00:00
time.sql	Please find attached two patches for documentation and regression tests	2006-07-06 01:46:38 +00:00
timestamp.sql	Install a more correct fix in the timestamp and timestamptz regression tests:	2007-02-16 17:49:15 +00:00
timestamptz.sql	Use "alternative" instead of "alternate" where it is clearer.	2007-11-07 12:24:24 +00:00
timetz.sql	Please find attached two patches for documentation and regression tests	2006-07-06 01:46:38 +00:00
tinterval.sql	Stop a few regression tests from needlessly disabling GEQO. This was	2007-05-29 04:17:08 +00:00
transactions.sql	Insert ORDER BY into a few regression test queries that now have unstable	2007-06-09 17:24:46 +00:00
triggers.sql	Change the row constructor syntax (ROW(...)) so that list elements foo.*	2006-06-26 17:24:41 +00:00
truncate.sql	Change TRUNCATE's method for searching for foreign-key references so that	2006-06-29 16:07:29 +00:00
tsdicts.sql	Rename and slightly redefine the default text search parser's "word"	2007-10-23 20:46:12 +00:00
tsearch.sql	Fix attribution for Rime of the Ancient Mariner (obviously it's been	2007-12-10 00:12:31 +00:00
tstypes.sql	Fix tsvectorout() and tsqueryout() to escape backslesh, add test of that.	2007-11-16 15:05:59 +00:00
txid.sql	Migrate the former contrib/txid module into core. This will make it easier	2007-10-13 23:06:28 +00:00
type_sanity.sql	Strengthen type_sanity's check on pg_type.typarray. It failed to	2007-10-13 22:33:38 +00:00
union.sql	Adjust data types in some of the UNION tests to avoid potentially	2003-11-02 22:35:26 +00:00
update.sql	Code review for UPDATE SET (columnlist) patch. Make it handle as much	2006-09-03 22:37:06 +00:00
uuid.sql	Rewrite uuid input and output routines to avoid dependency on the	2007-01-31 19:33:54 +00:00
vacuum.sql	Add new vacuum regression test files.	2002-07-20 04:58:14 +00:00
varchar.sql	Add a "USING" clause to DELETE, which is equivalent to the FROM clause	2005-04-07 01:51:41 +00:00
without_oid.sql	Combine cmin and cmax fields of HeapTupleHeaders into a single field, by	2007-02-09 03:35:35 +00:00
xml.sql	Allow XML processing instructions starting with "xml" while prohibiting	2007-11-09 15:52:51 +00:00