67 Commits (be76af171cdb3e7465c4ef234af403f97ad79b7b)

Author	SHA1	Message	Date
Tom Lane	d51260aa9d	Fix wrong/misleading comments, be more consistent about where to call ... ExecAssignResultTypeFromTL().	23 years ago
Tom Lane	5bab36e9f6	Revise executor APIs so that all per-query state structure is built in ... 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.	23 years ago
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.	23 years ago
Tom Lane	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.	23 years ago
Bruce Momjian	d84fe82230	Update copyright to 2002.	24 years ago
Tom Lane	f9e4f611a1	First pass at set-returning-functions in FROM, by Joe Conway with ... some kibitzing from Tom Lane. Not everything works yet, and there's no documentation or regression test, but let's commit this so Joe doesn't need to cope with tracking changes in so many files ...	24 years ago
Bruce Momjian	b81844b173	pgindent run on all C files. Java run to follow. initdb/regression ... tests pass.	24 years ago
Tom Lane	89fa551808	EXPLAIN ANALYZE feature to measure and show actual runtimes and tuple ... counts alongside the planner's estimates. By Martijn van Oosterhout, with some further work by Tom Lane.	24 years ago
Tom Lane	a3855c5761	Cause ExecCountSlots() accounting to bear some relationship to reality. ... Rather surprising we hadn't seen bug reports about this ...	25 years ago
Tom Lane	6f3da9ae17	Remove unnecessary EvalPlanQual support code --- since this plan node ... type never scans a relation directly, it can't be an EPQ target. Explicitly drop subplan's tuple table to ensure we have no buffer pin leaks.	25 years ago
Tom Lane	5708a56729	Append and SubqueryScan nodes were not passing changed-parameter signals down ... to their children, leading to misbehavior if they had any children that paid attention to chgParam (most plan node types don't). Append's bug has been there a long time, but nobody had noticed because it used to be difficult to create a query where an Append would be used below the top level of a plan; so there were never any parameters getting passed down. SubqueryScan is new in 7.1 ... and I'd modeled its behavior on Append :-(	25 years ago
Bruce Momjian	0686d49da0	Remove dashes in comments that don't need them, rewrap with pgindent.	25 years ago
Bruce Momjian	9e1552607a	pgindent run. Make it all clean.	25 years ago
Tom Lane	0d54d6ac44	Clean up handling of tuple descriptors so that result-tuple descriptors ... 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.	25 years ago
Bruce Momjian	623bf843d2	Change Copyright from PostgreSQL, Inc to PostgreSQL Global Development Group.	25 years ago
Tom Lane	05e3d0ee86	Reimplementation of UNION/INTERSECT/EXCEPT. INTERSECT/EXCEPT now meet the ... SQL92 semantics, including support for ALL option. All three can be used in subqueries and views. DISTINCT and ORDER BY work now in views, too. This rewrite fixes many problems with cross-datatype UNIONs and INSERT/SELECT where the SELECT yields different datatypes than the INSERT needs. I did that by making UNION subqueries and SELECT in INSERT be treated like subselects-in-FROM, thereby allowing an extra level of targetlist where the datatype conversions can be inserted safely. INITDB NEEDED!	25 years ago
Tom Lane	3a94e789f5	Subselects in FROM clause, per ISO syntax: FROM (SELECT ...) [AS] alias. ... (Don't forget that an alias is required.) Views reimplemented as expanding to subselect-in-FROM. Grouping, aggregates, DISTINCT in views actually work now (he says optimistically). No UNION support in subselects/views yet, but I have some ideas about that. Rule-related permissions checking moved out of rewriter and into executor. INITDB REQUIRED!	25 years ago