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path: root/src/backend/executor/nodeMergejoin.c
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* Another pgindent run with updated typedefs.Bruce Momjian2003-08-08
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* Update copyrights to 2003.Bruce Momjian2003-08-04
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* pgindent run.Bruce Momjian2003-08-04
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* Error message editing in backend/executor.Tom Lane2003-07-21
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* Ditch ExecGetTupType() in favor of the much simpler ExecGetResultType(),Tom Lane2003-05-05
| | | | | | which does the same thing. Perhaps at one time there was a reason to allow plan nodes to store their result types in different places, but AFAICT that's been unnecessary for a good while.
* IN clauses appearing at top level of WHERE can now be handled as joins.Tom Lane2003-01-20
| | | | | | | | | | There are two implementation techniques: the executor understands a new JOIN_IN jointype, which emits at most one matching row per left-hand row, or the result of the IN's sub-select can be fed through a DISTINCT filter and then joined as an ordinary relation. Along the way, some minor code cleanup in the optimizer; notably, break out most of the jointree-rearrangement preprocessing in planner.c and put it in a new file prep/prepjointree.c.
* Revise executor APIs so that all per-query state structure is built inTom Lane2002-12-15
| | | | | | a per-query memory context created by CreateExecutorState --- and destroyed by FreeExecutorState. This provides a final solution to the longstanding problem of memory leaked by various ExecEndNode calls.
* Phase 3 of read-only-plans project: ExecInitExpr now builds expressionTom Lane2002-12-13
| | | | | | | 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.
* Phase 2 of read-only-plans project: restructure expression-tree nodesTom Lane2002-12-12
| | | | | | | | | so that all executable expression nodes inherit from a common supertype Expr. This is somewhat of an exercise in code purity rather than any real functional advance, but getting rid of the extra Oper or Func node formerly used in each operator or function call should provide at least a little space and speed improvement. initdb forced by changes in stored-rules representation.
* Phase 1 of read-only-plans project: cause executor state nodes to pointTom Lane2002-12-05
| | | | | | | | | | 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.
* pgindent run.Bruce Momjian2002-09-04
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* Update copyright to 2002.Bruce Momjian2002-06-20
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* Change made to elog:Bruce Momjian2002-03-06
| | | | | | | | | | | | | | | | | | | o Change all current CVS messages of NOTICE to WARNING. We were going to do this just before 7.3 beta but it has to be done now, as you will see below. o Change current INFO messages that should be controlled by client_min_messages to NOTICE. o Force remaining INFO messages, like from EXPLAIN, VACUUM VERBOSE, etc. to always go to the client. o Remove INFO from the client_min_messages options and add NOTICE. Seems we do need three non-ERROR elog levels to handle the various behaviors we need for these messages. Regression passed.
* Teach planner about the idea that a mergejoin won't necessarily readTom Lane2002-03-01
| | | | | | both input streams to the end. If one variable's range is much less than the other, an indexscan-based merge can win by not scanning all of the other table. Per example from Reinhard Max.
* Another pgindent run. Fixes enum indenting, and improves #endifBruce Momjian2001-10-28
| | | | spacing. Also adds space for one-line comments.
* pgindent run on all C files. Java run to follow. initdb/regressionBruce Momjian2001-10-25
| | | | tests pass.
* Fix comments that were mis-wrapped, for Tom Lane.Bruce Momjian2001-03-23
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* Remove dashes in comments that don't need them, rewrap with pgindent.Bruce Momjian2001-03-22
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* pgindent run. Make it all clean.Bruce Momjian2001-03-22
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* Clean up handling of tuple descriptors so that result-tuple descriptorsTom Lane2001-01-29
| | | | | | | | allocated by plan nodes are not leaked at end of query. This doesn't really matter for normal queries, but it sure does for queries invoked repetitively inside SQL functions. Clean up some other grotty code associated with tupdescs, and fix a few other memory leaks exposed by tests with simple SQL functions.
* Change Copyright from PostgreSQL, Inc to PostgreSQL Global Development Group.Bruce Momjian2001-01-24
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* Fix thinko for case of outer join where inner table is empty: shouldTom Lane2000-12-13
| | | | output first outer tuple before advancing...
* Change SearchSysCache coding conventions so that a reference count isTom Lane2000-11-16
| | | | | | | maintained for each cache entry. A cache entry will not be freed until the matching ReleaseSysCache call has been executed. This eliminates worries about cache entries getting dropped while still in use. See my posting to pg-hackers of even date for more info.
* First cut at full support for OUTER JOINs. There are still a few looseTom Lane2000-09-12
| | | | | ends to clean up (see my message of same date to pghackers), but mostly it works. INITDB REQUIRED!
* SQL-language functions are now callable in ordinary fmgr contexts ...Tom Lane2000-08-24
| | | | | | 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.
* First stage of reclaiming memory in executor by resetting short-termTom Lane2000-07-12
| | | | | | 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.
* Final #include cleanup.Bruce Momjian2000-06-15
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* Add:Bruce Momjian2000-01-26
| | | | | | * Portions Copyright (c) 1996-2000, PostgreSQL, Inc to all files copyright Regents of Berkeley. Man, that's a lot of files.
* Fix handling of NULL constraint conditions: per SQL92 spec, a NULL resultTom Lane2000-01-19
| | | | | | | | | 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.
* Add system indexes to match all caches.Bruce Momjian1999-11-22
| | | | | | | Make all system indexes unique. Make all cache loads use system indexes. Rename *rel to *relid in inheritance tables. Rename cache names to be clearer.
* Actually, nodeMergejoin shouldn't include psort.h at all...Tom Lane1999-10-17
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* nodeMergejoin was depending on an inclusion from psort.h...Tom Lane1999-10-16
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* Several changes here, not very related but touching some of the same files.Tom Lane1999-09-24
| | | | | | | | | | | | | | | | | | | | | * Buffer refcount cleanup (per my "progress report" to pghackers, 9/22). * Add links to backend PROC structs to sinval's array of per-backend info, and use these links for routines that need to check the state of all backends (rather than the slow, complicated search of the ShmemIndex hashtable that was used before). Add databaseOID to PROC structs. * Use this to implement an interlock that prevents DESTROY DATABASE of a database containing running backends. (It's a little tricky to prevent a concurrently-starting backend from getting in there, since the new backend is not able to lock anything at the time it tries to look up its database in pg_database. My solution is to recheck that the DB is OK at the end of InitPostgres. It may not be a 100% solution, but it's a lot better than no interlock at all...) * In ALTER TABLE RENAME, flush buffers for the relation before doing the rename of the physical files, to ensure we don't get failures later from mdblindwrt(). * Update TRUNCATE patch so that it actually compiles against current sources :-(. You should do "make clean all" after pulling these changes.
* Final cleanup.Bruce Momjian1999-07-16
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* pgindent run over code.Bruce Momjian1999-05-25
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* Change error messages to oids come out as %u and not %d. Change has noBruce Momjian1999-05-10
| | | | real affect now.
* Fix executor to work correctly with mergejoins where left andTom Lane1999-02-28
| | | | right sides have different data types.
* update commentsBruce Momjian1999-02-24
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* Add first code to help with outer joins.Thomas G. Lockhart1999-02-23
| | | | | | Enable by defining CFLAGS+= -DENABLE_OUTER_JOINS -DEXEC_MERGEJOINDEBUG in your Makefile.custom
* comment cleanup.Bruce Momjian1999-02-22
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* Change my-function-name-- to my_function_name, and optimizer renames.Bruce Momjian1999-02-13
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* Cleanup of source files where 'return' or 'var =' is alone on a line.Bruce Momjian1999-02-03
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* OK, folks, here is the pgindent output.Bruce Momjian1998-09-01
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* Remove un-needed psort close.Bruce Momjian1998-07-19
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* 1) Queries using the having clause on base tables should work wellBruce Momjian1998-07-19
| | | | | | | | | | | | | | | | | | | | | | | | | now. Here some tested features, (examples included in the patch): 1.1) Subselects in the having clause 1.2) Double nested subselects 1.3) Subselects used in the where clause and in the having clause simultaneously 1.4) Union Selects using having 1.5) Indexes on the base relations are used correctly 1.6) Unallowed Queries are prevented (e.g. qualifications in the having clause that belong to the where clause) 1.7) Insert into as select 2) Queries using the having clause on view relations also work but there are some restrictions: 2.1) Create View as Select ... Having ...; using base tables in the select 2.1.1) The Query rewrite system: 2.1.2) Why are only simple queries allowed against a view from 2.1) ? 2.2) Select ... from testview1, testview2, ... having...; 3) Bug in ExecMergeJoin ?? Regards Stefan
* Remove un-needed braces around single statements.Bruce Momjian1998-06-15
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* Fix macros that were not properly surrounded by parens or braces.Bruce Momjian1998-06-15
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* ExecReScan for MergeJoin.Vadim B. Mikheev1998-02-27
| | | | | Marked inner tuple now is copied into mergestate->mj_MarkedTupleSlot - no more tricks arround ttc_shouldfree.
* pgindent run before 6.3 release, with Thomas' requested changes.Bruce Momjian1998-02-26
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* Used modified version of indent that understands over 100 typedefs.Bruce Momjian1997-09-08
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