- 11 Jul, 2006 1 commit
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Bruce Momjian authored
header files.
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- 05 Mar, 2006 1 commit
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Bruce Momjian authored
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- 03 Jun, 2005 1 commit
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Tom Lane authored
performance problem pointed out by phil@vodafone: to wit, we were spending O(N^2) time to check dropped-ness in an N-deep join tree, even in the case where the tree was freshly constructed and couldn't possibly mention any dropped columns. Instead of recursing in get_rte_attribute_is_dropped(), change the data structure definition: the joinaliasvars list of a JOIN RTE must have a NULL Const instead of a Var at any position that references a now-dropped column. This costs nothing during normal parse-rewrite-plan path, and instead we have a linear-time update to make when loading a stored rule that might contain now-dropped columns. While at it, move the responsibility for acquring locks on relations referenced by rules into this separate function (which I therefore chose to call AcquireRewriteLocks). This saves effort --- namely, duplicated lock grabs in parser and rewriter --- in the normal path at a cost of one extra non-locked heap_open() in the stored-rule path; seems a good tradeoff. A fringe benefit is that it is now *much* clearer that we acquire lock on relations referenced in rules before we make any rewriter decisions based on their properties. (I don't know of any bug of that ilk, but it wasn't exactly clear before.)
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- 31 Dec, 2004 1 commit
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PostgreSQL Daemon authored
Tag appropriate files for rc3 Also performed an initial run through of upgrading our Copyright date to extend to 2005 ... first run here was very simple ... change everything where: grep 1996-2004 && the word 'Copyright' ... scanned through the generated list with 'less' first, and after, to make sure that I only picked up the right entries ...
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- 29 Aug, 2004 1 commit
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Bruce Momjian authored
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- 29 Nov, 2003 1 commit
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PostgreSQL Daemon authored
make sure the $Id tags are converted to $PostgreSQL as well ...
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- 04 Aug, 2003 1 commit
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Bruce Momjian authored
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- 18 Jul, 2002 1 commit
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Bruce Momjian authored
COPY x (a,d,c,b) from stdin; COPY x (a,c) to stdout; as well as the corresponding changes to pg_dump to use the new functionality. This functionality is not available when using the BINARY option. If a column is not specified in the COPY FROM statement, its default values will be used. In addition to this functionality, I tweaked a couple of the error messages emitted by the new COPY <options> checks. Brent Verner
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- 20 Jun, 2002 1 commit
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Bruce Momjian authored
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- 05 Nov, 2001 1 commit
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Bruce Momjian authored
initdb/regression tests pass.
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- 28 Oct, 2001 1 commit
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Bruce Momjian authored
spacing. Also adds space for one-line comments.
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- 25 Oct, 2001 1 commit
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Bruce Momjian authored
tests pass.
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- 13 Jun, 2001 1 commit
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Tom Lane authored
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- 24 Jan, 2001 1 commit
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Bruce Momjian authored
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- 12 Sep, 2000 1 commit
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Tom Lane authored
ends to clean up (see my message of same date to pghackers), but mostly it works. INITDB REQUIRED!
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- 26 Jan, 2000 1 commit
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Bruce Momjian authored
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc to all files copyright Regents of Berkeley. Man, that's a lot of files.
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- 15 Jul, 1999 1 commit
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Bruce Momjian authored
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- 26 May, 1999 1 commit
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Bruce Momjian authored
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- 25 May, 1999 1 commit
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Bruce Momjian authored
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- 13 Feb, 1999 1 commit
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Bruce Momjian authored
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- 18 Jan, 1999 1 commit
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Bruce Momjian authored
INTERSECT and EXCEPT is available for postgresql-v6.4! The patch against v6.4 is included at the end of the current text (in uuencoded form!) I also included the text of my Master's Thesis. (a postscript version). I hope that you find something of it useful and would be happy if parts of it find their way into the PostgreSQL documentation project (If so, tell me, then I send the sources of the document!) The contents of the document are: -) The first chapter might be of less interest as it gives only an overview on SQL. -) The second chapter gives a description on much of PostgreSQL's features (like user defined types etc. and how to use these features) -) The third chapter starts with an overview of PostgreSQL's internal structure with focus on the stages a query has to pass (i.e. parser, planner/optimizer, executor). Then a detailed description of the implementation of the Having clause and the Intersect/Except logic is given. Originally I worked on v6.3.2 but never found time enough to prepare and post a patch. Now I applied the changes to v6.4 to get Intersect and Except working with the new version. Chapter 3 of my documentation deals with the changes against v6.3.2, so keep that in mind when comparing the parts of the code printed there with the patched sources of v6.4. Here are some remarks on the patch. There are some things that have still to be done but at the moment I don't have time to do them myself. (I'm doing my military service at the moment) Sorry for that :-( -) I used a rewrite technique for the implementation of the Except/Intersect logic which rewrites the query to a semantically equivalent query before it is handed to the rewrite system (for views, rules etc.), planner, executor etc. -) In v6.3.2 the types of the attributes of two select statements connected by the UNION keyword had to match 100%. In v6.4 the types only need to be familiar (i.e. int and float can be mixed). Since this feature did not exist when I worked on Intersect/Except it does not work correctly for Except/Intersect queries WHEN USED IN COMBINATION WITH UNIONS! (i.e. sometimes the wrong type is used for the resulting table. This is because until now the types of the attributes of the first select statement have been used for the resulting table. When Intersects and/or Excepts are used in combination with Unions it might happen, that the first select statement of the original query appears at another position in the query which will be executed. The reason for this is the technique used for the implementation of Except/Intersect which does a query rewrite!) NOTE: It is NOT broken for pure UNION queries and pure INTERSECT/EXCEPT queries!!! -) I had to add the field intersect_clause to some data structures but did not find time to implement printfuncs for the new field. This does NOT break the debug modes but when an Except/Intersect is used the query debug output will be the already rewritten query. -) Massive changes to the grammar rules for SELECT and INSERT statements have been necessary (see comments in gram.y and documentation for deatails) in order to be able to use mixed queries like (SELECT ... UNION (SELECT ... EXCEPT SELECT)) INTERSECT SELECT...; -) When using UNION/EXCEPT/INTERSECT you will get: NOTICE: equal: "Don't know if nodes of type xxx are equal". I did not have time to add comparsion support for all the needed nodes, but the default behaviour of the function equal met my requirements. I did not dare to supress this message! That's the reason why the regression test for union will fail: These messages are also included in the union.out file! -) Somebody of you changed the union_planner() function for v6.4 (I copied the targetlist to new_tlist and that was removed and replaced by a cleanup of the original targetlist). These chnages violated some having queries executed against views so I changed it back again. I did not have time to examine the differences between the two versions but now it works :-) If you want to find out, try the file queries/view_having.sql on both versions and compare the results . Two queries won't produce a correct result with your version. regards Stefan
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- 01 Sep, 1998 1 commit
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Bruce Momjian authored
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- 26 Nov, 1997 1 commit
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Bruce Momjian authored
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- 08 Sep, 1997 2 commits
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Bruce Momjian authored
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Bruce Momjian authored
Another PGINDENT run that changes variable indenting and case label indenting. Also static variable indenting.
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- 07 Sep, 1997 1 commit
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Bruce Momjian authored
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- 28 Aug, 1996 1 commit
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Marc G. Fournier authored
- code compile tested, but due to a yet unresolved problem with parse.h's creation, compile not completed...
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- 09 Jul, 1996 1 commit
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Marc G. Fournier authored
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