July 2009 - developers-list

Re: [Monetdb-developers] [Monetdb-checkins] MonetDB5/src/optimizer opt_inline.mx, , 1.22, 1.23
by Sjoerd Mullender 20 Jul '09

20 Jul '09

Should this be applied to the Stable branch? Martin Kersten wrote: > Update of /cvsroot/monetdb/MonetDB5/src/optimizer > In directory 23jxhf1.ch3.sourceforge.com:/tmp/cvs-serv11631 > > Modified Files: > opt_inline.mx > Log Message: > Protect lower levels against compound inline functions as well. > > > U opt_inline.mx > Index: opt_inline.mx > =================================================================== > RCS file: /cvsroot/monetdb/MonetDB5/src/optimizer/opt_inline.mx,v > retrieving revision 1.22 > retrieving revision 1.23 > diff -u -d -r1.22 -r1.23 > --- opt_inline.mx 16 May 2009 08:54:40 -0000 1.22 > +++ opt_inline.mx 20 Jul 2009 14:37:32 -0000 1.23 > @@ -50,6 +50,21 @@ > > extern int OPTinlineMultiplex(Client cntxt, MalBlkPtr mb, InstrPtr p); > > +static int > +isCorrectInline(MalBlkPtr mb){ > + /* make sure we have a simple inline function with a singe return */ > + InstrPtr p; > + int i, retseen=0; > + > + for( i= 1; i < mb->stop; i++){ > + p= getInstrPtr(mb,i); > + if ( p->token == RETURNsymbol || p->token == YIELDsymbol || > + p->barrier == RETURNsymbol || p->barrier == YIELDsymbol) > + retseen++; > + } > + return retseen == 1; > +} > + > int > OPTinlineImplementation(Client cntxt, MalBlkPtr mb, MalStkPtr stk, InstrPtr p) > { > @@ -85,7 +100,8 @@ > Check if the function definition is tagged as being inlined. > @c > if (sig->token == FUNCTIONsymbol && > - varGetProp(q->blk, getArg(sig, 0), inlineProp) != NULL) { > + varGetProp(q->blk, getArg(sig, 0), inlineProp) != NULL && > + isCorrectInline(q->blk) ) { > (void) inlineMALblock(mb,i,q->blk); > i--; > actions++; > > > ------------------------------------------------------------------------------ > Enter the BlackBerry Developer Challenge > This is your chance to win up to $100,000 in prizes! For a limited time, > vendors submitting new applications to BlackBerry App World(TM) will have > the opportunity to enter the BlackBerry Developer Challenge. See full prize > details at: http://p.sf.net/sfu/Challenge > _______________________________________________ > Monetdb-checkins mailing list > Monetdb-checkins(a)lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/monetdb-checkins -- Sjoerd Mullender

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Re: [Monetdb-developers] [Monetdb-checkins] MonetDB5/src/modules/mal algebraExtensions.mx, , 1.32, 1.33
by Stefan Manegold 18 Jul '09

18 Jul '09

On Sat, Jul 18, 2009 at 10:21:00AM +0000, Lefteris Sidirourgos wrote: > Update of /cvsroot/monetdb/MonetDB5/src/modules/mal > In directory 23jxhf1.ch3.sourceforge.com:/tmp/cvs-serv30235 > > Modified Files: > algebraExtensions.mx > Log Message: > load and unload the bats in each round of bloom prejoin, assuming that both dont fit in memory at the same time > ... results in (when comfigured with optimization enabled): ======== gcc -DHAVE_CONFIG_H -I. -I/ufs/manegold/_/scratch0/Monet/Testing/Current/source/MonetDB5/src/modules/mal -I../../.. -I/ufs/manegold/_/scratch0/Monet/Testing/Current/source/MonetDB5/src/modules/mal -I../atoms -I/ufs/manegold/_/scratch0/Monet/Testing/Current/source/MonetDB5/src/modules/mal/../atoms -I../kernel -I/ufs/manegold/_/scratch0/Monet/Testing/Current/source/MonetDB5/src/modules/mal/../kernel -I../../mal -I/ufs/manegold/_/scratch0/Monet/Testing/Current/source/MonetDB5/src/modules/mal/../../mal -I/ufs/manegold/_/scratch0/Monet/Testing/Current/prefix.--enable-strict_--disable-debug_--enable-optimize_--disable-assert/include/MonetDB -I/ufs/manegold/_/scratch0/Monet/Testing/Current/prefix.--enable-strict_--disable-debug_--enable-optimize_--disable-assert/include/MonetDB/mapilib -I/ufs/manegold/_/scratch0/Monet/Testing/Current/prefix.--enable-strict_--disable-debug_--enable-optimize_--disable-assert/include/MonetDB -I/ufs/manegold/_/scratch0/Monet/Testing/Current/prefix.--enable-strict_--disable-debug_--enable-optimize_--disable-assert/include/MonetDB/common -I/ufs/manegold/_/scratch0/Monet/Testing/Current/prefix.--enable-strict_--disable-debug_--enable-optimize_--disable-assert/include/MonetDB/gdk -I/usr/include/libxml2 -std=c99 -DLIBALGEBRAEXTENSIONS -O2 -Wall -Wextra -O6 -fomit-frame-pointer -finline-functions -falign-loops=4 -falign-jumps=4 -falign-functions=4 -fexpensive-optimizations -funroll-loops -frerun-cse-after-loop -frerun-loop-opt -ftree-vectorize -Werror-implicit-function-declaration -Werror -Wpointer-arith -Wdeclaration-after-statement -Wundef -Wp,-D_FORTIFY_SOURCE=2 -D_REENTRANT -c algebraExtensions.c -fPIC -DPIC -o .libs/lib_algebraExtensions_la-algebraExtensions.o cc1: warnings being treated as errors /ufs/manegold/_/scratch0/Monet/Testing/Current/source/MonetDB5/src/modules/mal/algebraExtensions.mx: In function ‘GDKbloomfilter_int_l’: /ufs/manegold/_/scratch0/Monet/Testing/Current/source/MonetDB5/src/modules/mal/algebraExtensions.mx:406: error: ‘blim’ may be used uninitialized in this function /ufs/manegold/_/scratch0/Monet/Testing/Current/source/MonetDB5/src/modules/mal/algebraExtensions.mx:660: note: ‘blim’ was declared here /ufs/manegold/_/scratch0/Monet/Testing/Current/source/MonetDB5/src/modules/mal/algebraExtensions.mx:410: error: ‘blog’ may be used uninitialized in this function /ufs/manegold/_/scratch0/Monet/Testing/Current/source/MonetDB5/src/modules/mal/algebraExtensions.mx:661: note: ‘blog’ was declared here /ufs/manegold/_/scratch0/Monet/Testing/Current/source/MonetDB5/src/modules/mal/algebraExtensions.mx:416: error: ‘bv’ may be used uninitialized in this function /ufs/manegold/_/scratch0/Monet/Testing/Current/source/MonetDB5/src/modules/mal/algebraExtensions.mx:658: note: ‘bv’ was declared here /ufs/manegold/_/scratch0/Monet/Testing/Current/source/MonetDB5/src/modules/mal/algebraExtensions.mx:423: error: ‘clim’ may be used uninitialized in this function /ufs/manegold/_/scratch0/Monet/Testing/Current/source/MonetDB5/src/modules/mal/algebraExtensions.mx:660: note: ‘clim’ was declared here /ufs/manegold/_/scratch0/Monet/Testing/Current/source/MonetDB5/src/modules/mal/algebraExtensions.mx:425: error: ‘cv’ may be used uninitialized in this function /ufs/manegold/_/scratch0/Monet/Testing/Current/source/MonetDB5/src/modules/mal/algebraExtensions.mx:658: note: ‘cv’ was declared here /ufs/manegold/_/scratch0/Monet/Testing/Current/source/MonetDB5/src/modules/mal/algebraExtensions.mx:443: error: ‘clog’ may be used uninitialized in this function /ufs/manegold/_/scratch0/Monet/Testing/Current/source/MonetDB5/src/modules/mal/algebraExtensions.mx:661: note: ‘clog’ was declared here /ufs/manegold/_/scratch0/Monet/Testing/Current/source/MonetDB5/src/modules/mal/algebraExtensions.mx:659: error: ‘b’ may be used uninitialized in this function make[8]: *** [lib_algebraExtensions_la-algebraExtensions.lo] Error 1 make[8]: Leaving directory `/net/rig.ins.cwi.nl/export/scratch0/manegold/Monet/Testing/Current/build.--enable-strict_--disable-debug_--enable-optimize_--disable-assert/MonetDB5/src/modules/mal' make[7]: *** [all-recursive] Error 1 make[7]: Leaving directory `/net/rig.ins.cwi.nl/export/scratch0/manegold/Monet/Testing/Current/build.--enable-strict_--disable-debug_--enable-optimize_--disable-assert/MonetDB5/src/modules/mal' make[6]: *** [all] Error 2 make[6]: Leaving directory `/net/rig.ins.cwi.nl/export/scratch0/manegold/Monet/Testing/Current/build.--enable-strict_--disable-debug_--enable-optimize_--disable-assert/MonetDB5/src/modules/mal' make[5]: *** [all-recursive] Error 1 make[5]: Leaving directory `/net/rig.ins.cwi.nl/export/scratch0/manegold/Monet/Testing/Current/build.--enable-strict_--disable-debug_--enable-optimize_--disable-assert/MonetDB5/src/modules' make[4]: *** [all] Error 2 make[4]: Leaving directory `/net/rig.ins.cwi.nl/export/scratch0/manegold/Monet/Testing/Current/build.--enable-strict_--disable-debug_--enable-optimize_--disable-assert/MonetDB5/src/modules' make[3]: *** [all-recursive] Error 1 make[3]: Leaving directory `/net/rig.ins.cwi.nl/export/scratch0/manegold/Monet/Testing/Current/build.--enable-strict_--disable-debug_--enable-optimize_--disable-assert/MonetDB5/src' make[2]: *** [all] Error 2 make[2]: Leaving directory `/net/rig.ins.cwi.nl/export/scratch0/manegold/Monet/Testing/Current/build.--enable-strict_--disable-debug_--enable-optimize_--disable-assert/MonetDB5/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/net/rig.ins.cwi.nl/export/scratch0/manegold/Monet/Testing/Current/build.--enable-strict_--disable-debug_--enable-optimize_--disable-assert/MonetDB5' make: *** [all] Error 2 ======== Stefan > > U algebraExtensions.mx > Index: algebraExtensions.mx > =================================================================== > RCS file: /cvsroot/monetdb/MonetDB5/src/modules/mal/algebraExtensions.mx,v > retrieving revision 1.32 > retrieving revision 1.33 > diff -u -d -r1.32 -r1.33 > --- algebraExtensions.mx 18 Jul 2009 08:43:03 -0000 1.32 > +++ algebraExtensions.mx 18 Jul 2009 10:20:58 -0000 1.33 > @@ -110,7 +110,7 @@ > is calculated for the heap(s) only. > @c > > -/* #define DEBUG_BLOOMFILTER*/ > +#define DEBUG_BLOOMFILTER > > static > size_t GDKbatfootprint(BAT *b){ > @@ -274,7 +274,7 @@ > cp = BATslice(cr, cl, cl+blk); > j = BATjoin(b,cp, BUN_NONE); > #ifdef DEBUG_BLOOMFILTER > - stream_printf(GDKout,"result " SZFMT " " SZFMT " " SZFMT "\n", bl, cl, BATcount(j)); > + stream_printf(GDKout,"result " SZFMT " " SZFMT " " SZFMT "\n", blk, cl, BATcount(j)); > #endif > if (bn == 0) > bn = BATnew( j->htype, j->ttype, BATcount(j)*blim/blk); > @@ -375,6 +375,30 @@ > } > > #define bloomhash(x,y,z) ((unsigned int) ((x)*(y))%(z)) > +#define bloomhash1(x,y,z) ((int) ((((x)*((double)y))-((int)((x)*(y))))*(z))) > +/* #define bloomhash1(x,y,z) ((unsigned int) ((x)*(y))%(z)) */ > + > +/*static double primes[]= {19,29,31,41,43,53,59,61};*/ > + > +@= print_bbloom > +#ifdef DEBUG_BLOOMFILTER > +counter = 0; > +for (i = 0; i < mb; i++) { > + counter += bbloom[i]; > +} > +stream_printf(GDKout,"bbloom has %d 1's and %d 0's\n", counter, mb-counter); > +counter = 0; > +#endif > + > +@= print_cbloom > +#ifdef DEBUG_BLOOMFILTER > +counter = 0; > +for (i = 0; i < mc; i++) { > + counter += cbloom[i]; > +} > +stream_printf(GDKout,"cbloom has %d 1's and %d 0's\n", counter, mc-counter); > +counter = 0; > +#endif > > @= body_smallsubset > char *bbloom; > @@ -474,42 +498,91 @@ > > @= body_outofmemory > char * cbloom, *bbloom; > - int bp[4]; > - int cp[4]; > + char bit; > + /*int bp[4]; > + int cp[4];*/ > + double bp[4]; > + double cp[4]; > int counter = 0; > + > + b = BATdescriptor(*bid); > + bv = (int*) Tloc(b, BUNfirst(b)); > + blim = BATcount(b); > + blog = (int) log(blim); > + > mb = blim*2; > - mc = clim*2; > + //mc = clim*2; > bbloom = (char *) GDKmalloc(mb); > - cbloom = (char *) GDKmalloc(mc); > + //cbloom = (char *) GDKmalloc(mc); > memset(bbloom, 0, mb); > - memset(cbloom, 0, mc); > + //memset(cbloom, 0, mc); > for (i = 0; i < 4; i++) { > bp[i] = (1 << (blog + i))+1; > - cp[i] = (1 << (clog + i))+1; > + //cp[i] = (1 << (clog + i))+1; > + /* > + bp[i] = primes[i]/((double) (sizeof(wrd)*8)); > + cp[i] = primes[i+1]/((double) (sizeof(wrd)*8)); > + */ > } > > - /* for (b) { built bloom } */ > + /* for (b) { built bloom } */ > for (i = 0; i < blim; i++) { > setBit(bbloom, bloomhash(bp[0],bv[i],mb), 1); > } > + /*@:print_bbloom@*/ > + BBPunfix(*bid); > + > + c = BATdescriptor(*cid); > + cv = (int*) Tloc(c, BUNfirst(c)); > + clim = BATcount(c); > + clog = (int) log(clim); > + mc = clim*2; > + cbloom = (char *) GDKmalloc(mc); > + memset(cbloom, 0, mc); > + > + for (i = 0; i < 4; i++) { > + cp[i] = (1 << (clog + i))+1; > + } > > /* for (c) { test bbloom; built cbloom } */ > for (i = 0; i < clim; i++) { > - if (tstBit(bbloom, bloomhash(bp[0],cv[i],mb))) { > + bit = tstBit(bbloom, bloomhash(bp[0],cv[i],mb)); > + setBit(cbloom, bloomhash(cp[0],cv[i],mc), > + bit | tstBit(cbloom, bloomhash(cp[0],cv[i],mc))); > + setBit(cbloom, bloomhash(cp[1],cv[i],mc), > + bit | tstBit(cbloom, bloomhash(cp[1],cv[i],mc))); > + /*if (tstBit(bbloom, bloomhash(bp[0],cv[i],mb))) { > setBit(cbloom, bloomhash(cp[0],cv[i],mc), 1); > setBit(cbloom, bloomhash(cp[1],cv[i],mc), 1); > counter++; > - } > + }*/ > } > + /*@:print_cbloom@*/ > + BBPunfix(*cid); > > #ifdef DEBUG_BLOOMFILTER > stream_printf(GDKout, "1st round c %d\n", counter); > counter = 0; > #endif > > + b = BATdescriptor(*bid); > + bv = (int*) Tloc(b, BUNfirst(b)); > memset(bbloom, 0, mb); > /* for (b) { test cbloom; rebuilt bbloom } */ > for (i = 0; i < blim; i++) { > + /* > + bit = tstBit(cbloom, bloomhash(cp[0],bv[i],mc)) && > + tstBit(cbloom, bloomhash(cp[1],bv[i],mc)); > + > + setBit(bbloom, bloomhash(bp[0],bv[i],mb), > + bit | tstBit(bbloom, bloomhash(bp[0],bv[i],mb))); > + setBit(bbloom, bloomhash(bp[1],bv[i],mb), > + bit | tstBit(bbloom, bloomhash(bp[1],bv[i],mb))); > + setBit(bbloom, bloomhash(bp[2],bv[i],mb), > + bit | tstBit(bbloom, bloomhash(bp[2],bv[i],mb))); > + setBit(bbloom, bloomhash(bp[3],bv[i],mb), > + bit | tstBit(bbloom, bloomhash(bp[3],bv[i],mb))); > + */ > if ((tstBit(cbloom, bloomhash(cp[0],bv[i],mc)) && > tstBit(cbloom, bloomhash(cp[1],bv[i],mc)))) { > setBit(bbloom, bloomhash(bp[0],bv[i],mb), 1); > @@ -519,13 +592,18 @@ > counter++; > } > } > + /*@:print_bbloom@*/ > + BBPunfix(*bid); > > #ifdef DEBUG_BLOOMFILTER > stream_printf(GDKout, "1st round b %d\n", counter); > counter = 0; > #endif > > + > /* for (c) { check bbloom } */ > + c = BATdescriptor(*cid); > + cv = (int*) Tloc(c, BUNfirst(c)); > *cn = BATnew(TYPE_oid,TYPE_int, clim/4); > memset(cbloom, 0, mc); > for (i = 0; i < clim; i++) { > @@ -542,12 +620,17 @@ > counter++; > } > } > + /*@:print_cbloom@*/ > + BBPunfix(*cid); > + GDKfree(bbloom); > > #ifdef DEBUG_BLOOMFILTER > stream_printf(GDKout, "2nd round c %d\n", counter); > counter = 0; > #endif > > + b = BATdescriptor(*bid); > + bv = (int*) Tloc(b, BUNfirst(b)); > *bn = BATnew(TYPE_oid,TYPE_int, blim/4); > /* for (b) {check cbloom} */ > for (i = 0; i < blim; i++) { > @@ -560,28 +643,30 @@ > counter++; > } > } > + BBPunfix(*bid); > + GDKfree(cbloom); > > #ifdef DEBUG_BLOOMFILTER > stream_printf(GDKout, "2nd round b %d\n", counter); > counter = 0; > #endif > > - > @c > > void > -GDKbloomfilter_int_l(BAT *b, BAT *c, BAT **bn, BAT **cn, int algo) { > +GDKbloomfilter_int_l(bat *bid, bat *cid, BAT **bn, BAT **cn, int algo) { > int *bv, *cv; > + BAT *b, *c; > BUN i, blim, clim; > int clog, blog; > BUN mb, mc; > mb = mc = 0; > > - /* b is the smaller one */ > + /* b is the smaller one > if ( BATcount(b) > BATcount(c) ) { > GDKbloomfilter_int_l(c, b, cn, bn, algo); > return; > - } > + } */ > > /* consider it an out-of-memory situation > if ( b->ttype != TYPE_int || GDKbatfootprint(b) < 25 ){ > @@ -592,12 +677,13 @@ > return; > }*/ > > + /* > bv = (int*) Tloc(b, BUNfirst(b)); > cv = (int*) Tloc(c, BUNfirst(c)); > blim= BATcount(b); > clim= BATcount(c); > clog = (int) log(clim); > - blog = (int) log(blim); > + blog = (int) log(blim); */ > > if (algo == 2) { > /* only build one bloom filter on the smaller BAT, > @@ -653,6 +739,7 @@ > (void) cntxt; > (void) mb; > > + > if ((b = BATdescriptor(*bid)) == NULL) > throw(MAL, "bbp.prejoin", INTERNAL_BAT_ACCESS); > if ( (c = BATdescriptor(*cid)) == NULL) { > @@ -667,7 +754,7 @@ > case 2: /* lefteris 1st */ > case 3: /* 2nd */ > case 4: /* 3rd */ > - GDKbloomfilter_int_l(b, c, &bn, &cn, algo); > + GDKbloomfilter_int_l(bid, cid, &bn, &cn, algo); > break; > case 5: /* blocked join */ > bn = GDKblockjoin(b,c); > > > ------------------------------------------------------------------------------ > Enter the BlackBerry Developer Challenge > This is your chance to win up to $100,000 in prizes! For a limited time, > vendors submitting new applications to BlackBerry App World(TM) will have > the opportunity to enter the BlackBerry Developer Challenge. See full prize > details at: http://p.sf.net/sfu/Challenge > _______________________________________________ > Monetdb-checkins mailing list > Monetdb-checkins(a)lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/monetdb-checkins -- | Dr. Stefan Manegold | mailto:Stefan.Manegold@cwi.nl | | CWI, P.O.Box 94079 | http://www.cwi.nl/~manegold/ | | 1090 GB Amsterdam | Tel.: +31 (20) 592-4212 | | The Netherlands | Fax : +31 (20) 592-4312 |

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Re: [Monetdb-developers] [Monetdb-checkins] testing/src Mtest.py.in, , 1.26, 1.27
by Stefan Manegold 17 Jul '09

17 Jul '09

On Thu, Jul 16, 2009 at 12:54:20PM +0000, Fabian wrote: > Update of /cvsroot/monetdb/testing/src > In directory 23jxhf1.ch3.sourceforge.com:/tmp/cvs-serv5974/src > > Modified Files: > Mtest.py.in > Log Message: > Have you ever wanted your machine to nearly die under a load of 20+ by > running Mtest? Now you can, using --jobs=<huge-number>. > > Implemented Parallel Mtest (r), parallelising where no Mtest has tested > before, using X worker jobs, where X defaults to 1. > > Parallelisation currently is done over directories only (inter-directory > dependencies are hard to track). No more chdirs are performed, so all > arguments are made absolute paths, resulting in some long output paths > here and there, compared to the old behaviour of Mtest. This might require quite a bunch of tests to be adapted accordingly, because so far basically all tests assumed that they were executed in the TSTTRGDIR (though there are tests that "don't care")... ... you already fixed some; but I guess there are (many?) more to do ... Wasn't there a chance to do a per-thread chdir? Or does Python not allow that? Stefan > Please test, enjoy and fix (preferably in parallel ;) ) > > > U Mtest.py.in > Index: Mtest.py.in > =================================================================== > RCS file: /cvsroot/monetdb/testing/src/Mtest.py.in,v > retrieving revision 1.26 > retrieving revision 1.27 > diff -u -d -r1.26 -r1.27 > --- Mtest.py.in 3 Jun 2009 11:42:33 -0000 1.26 > +++ Mtest.py.in 16 Jul 2009 12:54:18 -0000 1.27 > @@ -46,6 +46,9 @@ > import socket > import struct > import select > +from threading import Thread > +import copy > +import string > #import signal > #import getpass > import Mfilter > @@ -107,18 +110,22 @@ > [...1251 lines suppressed...] > + w.join() > + t = w.getTime() > + elem = w.getElem() > t_ = t_ + t > if elem is not None: > body.append(elem) > @@ -3756,7 +3832,7 @@ > if THISFILE == "Mtest.py": > env['TSTDIR'] = "" > env['TSTTRGDIR'] = os.path.join(env['TSTTRGBASE'],TSTPREF) > - CreateHtmlIndex(env, *body) > + CreateHtmlIndex(htmlenv, env, *body) > > Failed = 0 > for f in Failure[1:]: > @@ -3843,3 +3919,4 @@ > > # END > ############################################################################# > +# vim: set ts=4 sw=4 expandtab : > > > ------------------------------------------------------------------------------ > Enter the BlackBerry Developer Challenge > This is your chance to win up to $100,000 in prizes! For a limited time, > vendors submitting new applications to BlackBerry App World(TM) will have > the opportunity to enter the BlackBerry Developer Challenge. See full prize > details at: http://p.sf.net/sfu/Challenge > _______________________________________________ > Monetdb-checkins mailing list > Monetdb-checkins(a)lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/monetdb-checkins > > -- | Dr. Stefan Manegold | mailto:Stefan.Manegold@cwi.nl | | CWI, P.O.Box 94079 | http://www.cwi.nl/~manegold/ | | 1090 GB Amsterdam | Tel.: +31 (20) 592-4212 | | The Netherlands | Fax : +31 (20) 592-4312 |

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[Monetdb-developers] Connection string for ODBC
by Chebbi, Pavan 14 Jul '09

14 Jul '09

HI, Could anybody give me a connection string to use with ODBC DSN ? I am not able to connect even after I installed and configured ODBC driver. Thanks, Pavan

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[Monetdb-developers] Is monetDB nativeXML or not?
by Mtekel 10 Jul '09

10 Jul '09

Hello, I have a question, whether MonetDB/XQuery is native XML database or not. To clarify what is native or not, http://en.wikipedia.org/wiki/XML_database : " Two major classes of XML database exist: XML-enabled: these map all XML to a traditional database (such as a relational database), accepting XML as input and rendering XML as output. This term implies that the database does the conversion itself (as opposed to relying on middleware). Native XML (NXD): the internal model of such databases depends on XML and uses XML documents as the fundamental unit of storage, which are, however, not necessarily stored in the form of text files. " Then according to this page, monetDB is native XML: http://monetdb.cwi.nl/MonetDB/Version4/Documentation/monet/index.html " 2 MonetDB Features MonetDB is database engine geared at high performance on systems with (complex) queries that have to analyze large amounts of data (i.e. OLAP, not OLTP). The features in which it most differs from other DBMSs are summarized below: Independence of SQL: MonetDB has a front-end/back-end design allowing the storage of more than just relational tables (such as object-oriented or native XML data), and allowing the use of querying paradigms other than just SQL (such as OQL and XQuery). " Whereas according to this one, it is not: http://monetdb.cwi.nl/projects/monetdb/XQuery/Documentation/Separate-Documen ts-vs-Document-Collections.html#Separate-Documents-vs-Document-Collections : " 2.9.1.1 Storage Overhead In MonetDB/XQuery all XML is stored in relational tables. " Is then monetDB really native? Thanks in advance for clarification... Regards, M. Tekel

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[Monetdb-developers] Python breaks clients?
by Stefan de Konink 03 Jul '09

03 Jul '09

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 make[9]: *** No rule to make target `mapi25.py', needed by `install-exec-local-mapi25.py'. Stop. Does anyone have this currently? I do have python2.6 installed. Stefan -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEAREKAAYFAkpNJx0ACgkQYH1+F2Rqwn0KRACfdFMjhXlYnsrihaIM88Bls50N mlgAn0eJ9p45+n2wKY8mNZi4PzS6aeSP =v+Uj -----END PGP SIGNATURE-----

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[Monetdb-developers] Mapilib example
by Fabian Groffen 02 Jul '09

02 Jul '09

Hi all, Triggered by a request from a user I changed the mapilib example somewhat. In particular, I tried to make the example more "school style", e.g. don't use a define for something which could have been a function. More important, I added code to walk multi-resultset handles in case there is an error, such that it eventually gets printed. I also closed the handle in the die function as proper cleanup example. I removed some mapi_error checks that I thought were redundant, but I'm not sure. Hence, please review the attached diff and comment before I commit this. The example compiles without warnings for me now, and also works for as far as I can see.

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