Commit Graph

379 Commits

Author SHA1 Message Date
Tom Lane
375369acd1 Replace TupleTableSlot convention for whole-row variables and function
results with tuples as ordinary varlena Datums.  This commit does not
in itself do much for us, except eliminate the horrid memory leak
associated with evaluation of whole-row variables.  However, it lays the
groundwork for allowing composite types as table columns, and perhaps
some other useful features as well.  Per my proposal of a few days ago.
2004-04-01 21:28:47 +00:00
Bruce Momjian
40f456ce56 Remove double-rename used by Win32 on busy files. Not needed anymore. 2004-03-16 05:05:58 +00:00
Tom Lane
04226b6404 Tweak planner so that index expressions and predicates are matched to
queries without regard to whether coercions are stated explicitly or
implicitly.  Per suggestion from Stephan Szabo.
2004-03-14 23:41:27 +00:00
Bruce Momjian
c672aa823b For application to HEAD, following community review.
* Changes incorrect CYGWIN defines to __CYGWIN__

* Some localtime returns NULL checks (when unchecked cause SEGVs under
Win32
regression tests)

* Rationalized CreateSharedMemoryAndSemaphores and
AttachSharedMemoryAndSemaphores (Bruce, I finally remembered to do it);
requires attention.

Claudio Natoli
2004-02-25 19:41:23 +00:00
Tom Lane
87bd956385 Restructure smgr API as per recent proposal. smgr no longer depends on
the relcache, and so the notion of 'blind write' is gone.  This should
improve efficiency in bgwriter and background checkpoint processes.
Internal restructuring in md.c to remove the not-very-useful array of
MdfdVec objects --- might as well just use pointers.
Also remove the long-dead 'persistent main memory' storage manager (mm.c),
since it seems quite unlikely to ever get resurrected.
2004-02-10 01:55:27 +00:00
Bruce Momjian
d9d2ca8e8e Adjust rename on Win32 to only link to temp name while holding lock,
then release locks and loop over renaming to active file name.
2004-02-02 00:17:23 +00:00
Tom Lane
c77f363384 Ensure that close() and fclose() are checked for errors, at least in
cases involving writes.  Per recent discussion about the possibility
of close-time failures on some filesystems.  There is a TODO item for
this, too.
2004-01-26 22:35:32 +00:00
Tom Lane
c607bd693f Clean up the usage of canonicalize_qual(): in particular, be consistent
about whether it is applied before or after eval_const_expressions().
I believe there were some corner cases where the system would fail to
recognize that a partial index is applicable because of the previous
inconsistency.  Store normal rather than 'implicit AND' representations
of constraints and index predicates in the catalogs.
initdb forced due to representation change of constraints/predicates.
2003-12-28 21:57:37 +00:00
Tom Lane
7f8f7665fc Planner failed to be smart about binary-compatible expressions in pathkeys
and hash bucket-size estimation.  Issue has been there awhile but is more
critical in 7.4 because it affects varchar columns.  Per report from
Greg Stark.
2003-12-03 17:45:10 +00:00
PostgreSQL Daemon
969685ad44 $Header: -> $PostgreSQL Changes ... 2003-11-29 19:52:15 +00:00
Tom Lane
fa5c8a055a Cross-data-type comparisons are now indexable by btrees, pursuant to my
pghackers proposal of 8-Nov.  All the existing cross-type comparison
operators (int2/int4/int8 and float4/float8) have appropriate support.
The original proposal of storing the right-hand-side datatype as part of
the primary key for pg_amop and pg_amproc got modified a bit in the event;
it is easier to store zero as the 'default' case and only store a nonzero
when the operator is actually cross-type.  Along the way, remove the
long-since-defunct bigbox_ops operator class.
2003-11-12 21:15:59 +00:00
Tom Lane
c1d62bfd00 Add operator strategy and comparison-value datatype fields to ScanKey.
Remove the 'strategy map' code, which was a large amount of mechanism
that no longer had any use except reverse-mapping from procedure OID to
strategy number.  Passing the strategy number to the index AM in the
first place is simpler and faster.
This is a preliminary step in planned support for cross-datatype index
operations.  I'm committing it now since the ScanKeyEntryInitialize()
API change touches quite a lot of files, and I want to commit those
changes before the tree drifts under me.
2003-11-09 21:30:38 +00:00
Tom Lane
b833c3d4a4 Fix pg_get_constraintdef() to ensure CHECK constraints are always shown
with required outer parentheses.  Breakage seems to be leftover from
domain-constraint patches.  This could be smarter about suppressing
extra parens, but at this stage of the release cycle I want certainty
not cuteness.
2003-10-04 18:22:59 +00:00
Peter Eisentraut
feb4f44d29 Message editing: remove gratuitous variations in message wording, standardize
terms, add some clarifications, fix some untranslatable attempts at dynamic
message building.
2003-09-25 06:58:07 +00:00
Tom Lane
a56a016ceb Repair some REINDEX problems per recent discussions. The relcache is
now able to cope with assigning new relfilenode values to nailed-in-cache
indexes, so they can be reindexed using the fully crash-safe method.  This
leaves only shared system indexes as special cases.  Remove the 'index
deactivation' code, since it provides no useful protection in the shared-
index case.  Require reindexing of shared indexes to be done in standalone
mode, but remove other restrictions on REINDEX.  -P (IgnoreSystemIndexes)
now prevents using indexes for lookups, but does not disable index updates.
It is therefore safe to allow from PGOPTIONS.  Upshot: reindexing system catalogs
can be done without a standalone backend for all cases except
shared catalogs.
2003-09-24 18:54:02 +00:00
Tom Lane
ec646dbc65 Create a 'type cache' that keeps track of the data needed for any particular
datatype by array_eq and array_cmp; use this to solve problems with memory
leaks in array indexing support.  The parser's equality_oper and ordering_oper
routines also use the cache.  Change the operator search algorithms to look
for appropriate btree or hash index opclasses, instead of assuming operators
named '<' or '=' have the right semantics.  (ORDER BY ASC/DESC now also look
at opclasses, instead of assuming '<' and '>' are the right things.)  Add
several more index opclasses so that there is no regression in functionality
for base datatypes.  initdb forced due to catalog additions.
2003-08-17 19:58:06 +00:00
Tom Lane
302f1a86dc Rewriter and planner should use only resno, not resname, to identify
target columns in INSERT and UPDATE targetlists.  Don't rely on resname
to be accurate in ruleutils, either.  This fixes bug reported by
Donald Fraser, in which renaming a column referenced in a rule did not
work very well.
2003-08-11 23:04:50 +00:00
Bruce Momjian
f3c3deb7d0 Update copyrights to 2003. 2003-08-04 02:40:20 +00:00
Bruce Momjian
089003fb46 pgindent run. 2003-08-04 00:43:34 +00:00
Tom Lane
81b5c8a136 A visit from the message-style police ... 2003-07-28 00:09:16 +00:00
Tom Lane
689eb53e47 Error message editing in backend/utils (except /adt). 2003-07-25 20:18:01 +00:00
Tom Lane
e3b1b6c0cd Aggregates can be polymorphic, using polymorphic implementation functions.
It also works to create a non-polymorphic aggregate from polymorphic
functions, should you want to do that.  Regression test added, docs still
lacking.  By Joe Conway, with some kibitzing from Tom Lane.
2003-07-01 19:10:53 +00:00
Tom Lane
b3c0551eda Create real array comparison functions (that use the element datatype's
comparison functions), replacing the highly bogus bitwise array_eq.  Create
a btree index opclass for ANYARRAY --- it is now possible to create indexes
on array columns.
Arrange to cache the results of catalog lookups across multiple array
operations, instead of repeating the lookups on every call.
Add string_to_array and array_to_string functions.
Remove singleton_array, array_accum, array_assign, and array_subscript
functions, since these were for proof-of-concept and not intended to become
supported functions.
Minor adjustments to behavior in some corner cases with empty or
zero-dimensional arrays.

Joe Conway (with some editorializing by Tom Lane).
2003-06-27 00:33:26 +00:00
Bruce Momjian
111d8e522b Back out array mega-patch.
Joe Conway
2003-06-25 21:30:34 +00:00
Bruce Momjian
ca64391d6c Updated the pg_get_constraintdef() to use conbin. Update pg_dump to use
pg_get_constraintdef() for >= 70400.

Rod Taylor <rbt@rbt.ca>
2003-06-25 03:56:31 +00:00
Bruce Momjian
46bf651480 Array mega-patch.
Joe Conway
2003-06-24 23:14:49 +00:00
Tom Lane
bff0422b6c Revise hash join and hash aggregation code to use the same datatype-
specific hash functions used by hash indexes, rather than the old
not-datatype-aware ComputeHashFunc routine.  This makes it safe to do
hash joining on several datatypes that previously couldn't use hashing.
The sets of datatypes that are hash indexable and hash joinable are now
exactly the same, whereas before each had some that weren't in the other.
2003-06-22 22:04:55 +00:00
Tom Lane
fc8d970cbc Replace functional-index facility with expressional indexes. Any column
of an index can now be a computed expression instead of a simple variable.
Restrictions on expressions are the same as for predicates (only immutable
functions, no sub-selects).  This fixes problems recently introduced with
inlining SQL functions, because the inlining transformation is applied to
both expression trees so the planner can still match them up.  Along the
way, improve efficiency of handling index predicates (both predicates and
index expressions are now cached by the relcache) and fix 7.3 oversight
that didn't record dependencies of predicate expressions.
2003-05-28 16:04:02 +00:00
Bruce Momjian
98b6f37e47 Make debug_ GUC varables output DEBUG1 rather than LOG, and mention in
docs that CLIENT/LOG_MIN_MESSAGES now controls debug_* output location.
Doc changes included.
2003-05-27 17:49:47 +00:00
Tom Lane
f45df8c014 Cause CHAR(n) to TEXT or VARCHAR conversion to automatically strip trailing
blanks, in hopes of reducing the surprise factor for newbies.  Remove
redundant operators for VARCHAR (it depends wholly on TEXT operations now).
Clean up resolution of ambiguous operators/functions to avoid surprising
choices for domains: domains are treated as equivalent to their base types
and binary-coercibility is no longer considered a preference item when
choosing among multiple operators/functions.  IsBinaryCoercible now correctly
reflects the notion that you need *only* relabel the type to get from type
A to type B: that is, a domain is binary-coercible to its base type, but
not vice versa.  Various marginal cleanup, including merging the essentially
duplicate resolution code in parse_func.c and parse_oper.c.  Improve opr_sanity
regression test to understand about binary compatibility (using pg_cast),
and fix a couple of small errors in the catalogs revealed thereby.
Restructure "special operator" handling to fetch operators via index opclasses
rather than hardwiring assumptions about names (cleans up the pattern_ops
stuff a little).
2003-05-26 00:11:29 +00:00
Tom Lane
1c9ac7dfd0 Change pg_amop's index on (amopclaid,amopopr) to index (amopopr,amopclaid).
This makes no difference for existing uses, but allows SelectSortFunction()
and pred_test_simple_clause() to use indexscans instead of seqscans to
locate entries for a particular operator in pg_amop.  Better yet, they can
use the SearchSysCacheList() API to cache the search results.
2003-05-13 04:38:58 +00:00
Tom Lane
0ac6298bb8 Implement new-protocol binary I/O support in DataRow, Bind, and FunctionCall
messages.  Binary I/O is now up and working, but only for a small set
of datatypes (integers, text, bytea).
2003-05-09 18:08:48 +00:00
Tom Lane
730840c9b6 First phase of work on array improvements. ARRAY[x,y,z] constructor
expressions, ARRAY(sub-SELECT) expressions, some array functions.
Polymorphic functions using ANYARRAY/ANYELEMENT argument and return
types.  Some regression tests in place, documentation is lacking.
Joe Conway, with some kibitzing from Tom Lane.
2003-04-08 23:20:04 +00:00
Tom Lane
8d9e025e7f Instead of storing pg_statistic stavalues entries as text strings, store
them as arrays of the internal datatype.  This requires treating the
stavalues columns as 'anyarray' rather than 'text[]', which is not 100%
kosher but seems to work fine for the purposes we need for pg_statistic.
Perhaps in the future 'anyarray' will be allowed more generally.
2003-03-23 05:14:37 +00:00
Tom Lane
39b7ec3309 Create a distinction between Lists of integers and Lists of OIDs, to get
rid of the assumption that sizeof(Oid)==sizeof(int).  This is one small
step towards someday supporting 8-byte OIDs.  For the moment, it doesn't
do much except get rid of a lot of unsightly casts.
2003-02-09 06:56:28 +00:00
Tom Lane
3752e85bad Determine the set of constraints applied to a domain at executor
startup, not in the parser; this allows ALTER DOMAIN to work correctly
with domain constraint operations stored in rules.  Rod Taylor;
code review by Tom Lane.
2003-02-03 21:15:45 +00:00
Tom Lane
de97072e3c Allow merge and hash joins to occur on arbitrary expressions (anything not
containing a volatile function), rather than only on 'Var = Var' clauses
as before.  This makes it practical to do flatten_join_alias_vars at the
start of planning, which in turn eliminates a bunch of klugery inside the
planner to deal with alias vars.  As a free side effect, we now detect
implied equality of non-Var expressions; for example in
	SELECT ... WHERE a.x = b.y and b.y = 42
we will deduce a.x = 42 and use that as a restriction qual on a.  Also,
we can remove the restriction introduced 12/5/02 to prevent pullup of
subqueries whose targetlists contain sublinks.
Still TODO: make statistical estimation routines in selfuncs.c and costsize.c
smarter about expressions that are more complex than plain Vars.  The need
for this is considerably greater now that we have to be able to estimate
the suitability of merge and hash join techniques on such expressions.
2003-01-15 19:35:48 +00:00
Tom Lane
260faf0b63 Fix ALTER TABLE ADD COLUMN to disallow the same column types that are
disallowed by CREATE TABLE (eg, pseudo-types); also disallow these types
from being introduced by the range-function syntax.  While at it, allow
CREATE TABLE to create zero-column tables, per recent pghackers discussion.
I am back-patching this into 7.3 since failure to disallow pseudo-types
is arguably a security hole.
2002-12-16 18:39:22 +00:00
Tom Lane
e64c7feb2f Tweak default memory context allocation policy so that a context is not
given any malloc block until something is first allocated in it; but
thereafter, MemoryContextReset won't release that first malloc block.
This preserves the quick-reset property of the original policy, without
forcing 8K to be allocated to every context whether any of it is ever
used or not.  Also, remove some more no-longer-needed explicit freeing
during ExecEndPlan.
2002-12-15 21:01:34 +00:00
Tom Lane
3a4f7dde16 Phase 3 of read-only-plans project: ExecInitExpr now builds expression
execution state trees, and ExecEvalExpr takes an expression state tree
not an expression plan tree.  The plan tree is now read-only as far as
the executor is concerned.  Next step is to begin actually exploiting
this property.
2002-12-13 19:46:01 +00:00
Bruce Momjian
7816c7cb94 More cleanup of userid to be AclId rather than Oid. 2002-12-05 04:04:51 +00:00
Tom Lane
8e3a87fbd4 Teach planner to expand sufficiently simple SQL-language functions
('SELECT expression') inline, like macros, during the constant-folding
phase of planning.  The actual expansion is not difficult, but checking
that we're not changing the semantics of the call turns out to be more
subtle than one might think; in particular must pay attention to
permissions issues, strictness, and volatility.
2002-12-01 21:05:14 +00:00
Tom Lane
f893ee271f Remove unused constisset and constiscast fields of Const nodes. Clean
up code and documentation associated with Param nodes.
2002-11-25 21:29:42 +00:00
Tom Lane
24b130cb89 Add relcache support for system catalogs with attnotnull columns.
The code was not making TupleConstr structs for such catalogs in
several places; with the consequence that the not-null constraint
wasn't actually enforced.  With this change,
INSERT INTO pg_proc VALUES('sdf');
generates a 'Fail to add null value' error instead of a core dump.
2002-11-15 17:18:49 +00:00
Bruce Momjian
9b12ab6d5d Add new palloc0 call as merge of palloc and MemSet(0). 2002-11-13 00:39:48 +00:00
Bruce Momjian
75fee4535d Back out use of palloc0 in place if palloc/MemSet. Seems constant len
to MemSet is a performance boost.
2002-11-11 03:02:20 +00:00
Bruce Momjian
8fee9615cc Merge palloc()/MemSet(0) calls into a single palloc0() call. 2002-11-10 07:25:14 +00:00
Tom Lane
8f2a289d78 Arrange to copy relcache's trigdesc structure at the start of any
query that uses it.  This ensures that triggers will be applied consistently
throughout a query even if someone commits changes to the relation's
pg_class.reltriggers field meanwhile.  Per crash report from Laurette Cisneros.
While at it, simplify memory management in relcache.c, which no longer
needs the old hack to try to keep trigger info in the same place over
a relcache entry rebuild.  (Should try to fix rd_att and rewrite-rule
access similarly, someday.)  And make RelationBuildTriggers simpler and
more robust by making it build the trigdesc in working memory and then
CopyTriggerDesc() into cache memory.
2002-10-14 16:51:30 +00:00
Tom Lane
3503f19eeb RelationClearRelation must reset rd_targblock and update rd_nblocks
even when dealing with a nailed-in-cache relation; otherwise, following
VACUUM truncation of a system catalog, other backends might have
unreasonably large values of these fields.
2002-09-22 20:56:28 +00:00
Tom Lane
da395b56cd Tweak heap.c to refuse attempts to create table columns of standalone
composite types.  Add a couple more lsyscache.c routines to support this,
and make use of them in some other places that were doing lookups the
hard way.
2002-09-19 23:40:56 +00:00