Disable the result-set alias cache when on conditional code branches.
Ticket #3461. The column cache and result set alias cache mechanisms are prone to this kind of error and need to be refactored. This check-in should be considered a temporary fix in advance of a more general redesign of the whole mechanism. (CVS 5841) FossilOrigin-Name: 1fa3bbd8220ce073e91935ea362b6f5d5d6d2859
This commit is contained in:
drh
parent
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commit
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20
manifest
20
manifest
@ -1,5 +1,5 @@
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C Add\sfile\stkt3461.test\swith\sa\sfew\sexamples\sof\sbug\s#3461.\sBecause\sthese\stests\scurrently\sfail\sthey\sare\sdisabled\sfor\snow.\s(CVS\s5840)
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D 2008-10-25T09:35:00
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C Disable\sthe\sresult-set\salias\scache\swhen\son\sconditional\scode\sbranches.\nTicket\s#3461.\s\sThe\scolumn\scache\sand\sresult\sset\salias\scache\smechanisms\sare\nprone\sto\sthis\skind\sof\serror\sand\sneed\sto\sbe\srefactored.\s\sThis\scheck-in\sshould\nbe\sconsidered\sa\stemporary\sfix\sin\sadvance\sof\sa\smore\sgeneral\sredesign\sof\sthe\nwhole\smechanism.\s(CVS\s5841)
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D 2008-10-25T15:03:21
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F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
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F Makefile.in 3fe17eccd87d385b5adc9766828716cfdd154d6b
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F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
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@ -107,7 +107,7 @@ F src/callback.c e970e5beddbdb23f89a6d05cb1a6419d9f755624
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F src/complete.c cb14e06dbe79dee031031f0d9e686ff306afe07c
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F src/date.c 6f4277fa56d8c1b8e70c0bde838c9e99609f5ec0
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F src/delete.c d3f2adfdd07e701115a111cc81dca33ed6039d10
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F src/expr.c f84e7606f4d6c4b7ae48f324ca625e3b4a90acdd
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F src/expr.c 2b1945314fdc661fb04306cb86bd8516cfd12d4a
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F src/fault.c dc88c821842157460750d2d61a8a8b4197d047ff
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F src/func.c 8431b40a7843d1024145684d303c55b4ee087bbe
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F src/global.c 20a3fe46c8287a01ba3a7442558f0eb70c66b19a
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@ -201,10 +201,10 @@ F src/vdbefifo.c 20fda2a7c4c0bcee1b90eb7e545fefcdbf2e1de7
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F src/vdbemem.c ead88713b852576e2a924bc4ae696964bfbaec0a
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F src/vtab.c 527c180e9c5fca417c9167d02af4b5039f892b4b
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F src/walker.c 488c2660e13224ff70c0c82761118efb547f8f0d
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F src/where.c 76bc0a7a5eb2e20b72b644f7c5f104c285143a54
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F src/where.c 1853c1bfb567a415d904d70a4613dc07b00c74c5
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F tclinstaller.tcl 4356d9d94d2b5ed5e68f9f0c80c4df3048dd7617
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F test/aggerror.test a867e273ef9e3d7919f03ef4f0e8c0d2767944f2
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F test/alias.test c321c114a8a31a33e3cbda910fa39949f5d9dcb2
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F test/alias.test 597662c5d777a122f9a3df0047ea5c5bd383a911
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F test/all.test 03cdd58d389e35bee8d57b7d24357b827aecc463
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F test/alter.test 6353aae6839e486c9b7d8f73b1f4a1e98e57332c
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F test/alter2.test dd55146e812622c8fc51fd2216bcd8dca8880752
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@ -572,7 +572,7 @@ F test/tkt3357.test b37a51a12ba5e143d6714778276438606f8f9e27
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F test/tkt3419.test 1bbf36d7ea03b638c15804251287c2391f5c1f6b
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F test/tkt3424.test 3171193ce340cff6b7ea81c03b8fa1cbc34ec36e
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F test/tkt3442.test 33722a3fa4bdc0614448044eb5e28765aea28eb7
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F test/tkt3461.test 721baececbbe1ff2d920c4afe144aec8f1cd4700
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F test/tkt3461.test 5a63e8d8ee5ce00f076b1e2f82aba5480a0f14ed
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F test/tokenize.test ce430a7aed48fc98301611429595883fdfcab5d7
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F test/trace.test 951cd0f5f571e7f36bf7bfe04be70f90fb16fb00
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F test/trans.test 2fd24cd7aa0b879d49a224cbd647d698f1e7ac5c
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@ -651,7 +651,7 @@ F tool/speedtest16.c c8a9c793df96db7e4933f0852abb7a03d48f2e81
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F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
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F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
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F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
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P 0e448bc6096c7ee3b21dbd22dc4ca9470ae7ba31
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R 647a880312760274ee6a7e651604e91e
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U danielk1977
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Z dd44d62c4f3751c885e341c9f98ba13d
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P f2cc159159278201809022706c28bc53b6c3c859
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R 834f8fa8222ec3788eea3c5c99405941
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U drh
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Z cdbf7fca1951d2efcea11548a6916305
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@ -1 +1 @@
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f2cc159159278201809022706c28bc53b6c3c859
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1fa3bbd8220ce073e91935ea362b6f5d5d6d2859
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22
src/expr.c
22
src/expr.c
@ -12,7 +12,7 @@
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** This file contains routines used for analyzing expressions and
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** for generating VDBE code that evaluates expressions in SQLite.
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**
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** $Id: expr.c,v 1.399 2008/10/11 16:47:36 drh Exp $
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** $Id: expr.c,v 1.400 2008/10/25 15:03:21 drh Exp $
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*/
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#include "sqliteInt.h"
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#include <ctype.h>
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@ -1718,7 +1718,7 @@ void sqlite3ExprHardCopy(Parse *pParse, int iReg, int nReg){
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** of the iAlias-th alias is stored. If zero, that means that the
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** alias has not yet been computed.
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*/
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static int codeAlias(Parse *pParse, int iAlias, Expr *pExpr){
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static int codeAlias(Parse *pParse, int iAlias, Expr *pExpr, int target){
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sqlite3 *db = pParse->db;
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int iReg;
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if( pParse->aAlias==0 ){
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@ -1729,9 +1729,13 @@ static int codeAlias(Parse *pParse, int iAlias, Expr *pExpr){
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assert( iAlias>0 && iAlias<=pParse->nAlias );
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iReg = pParse->aAlias[iAlias-1];
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if( iReg==0 ){
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iReg = ++pParse->nMem;
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sqlite3ExprCode(pParse, pExpr, iReg);
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pParse->aAlias[iAlias-1] = iReg;
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if( pParse->disableColCache ){
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iReg = sqlite3ExprCodeTarget(pParse, pExpr, target);
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}else{
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iReg = ++pParse->nMem;
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sqlite3ExprCode(pParse, pExpr, iReg);
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pParse->aAlias[iAlias-1] = iReg;
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}
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}
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return iReg;
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}
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@ -1840,7 +1844,7 @@ int sqlite3ExprCodeTarget(Parse *pParse, Expr *pExpr, int target){
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break;
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}
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case TK_AS: {
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inReg = codeAlias(pParse, pExpr->iTable, pExpr->pLeft);
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inReg = codeAlias(pParse, pExpr->iTable, pExpr->pLeft, target);
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break;
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}
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#ifndef SQLITE_OMIT_CAST
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@ -2500,9 +2504,11 @@ int sqlite3ExprCodeExprList(
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n = pList->nExpr;
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for(pItem=pList->a, i=0; i<n; i++, pItem++){
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if( pItem->iAlias ){
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int iReg = codeAlias(pParse, pItem->iAlias, pItem->pExpr);
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int iReg = codeAlias(pParse, pItem->iAlias, pItem->pExpr, target+i);
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Vdbe *v = sqlite3GetVdbe(pParse);
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sqlite3VdbeAddOp2(v, OP_SCopy, iReg, target+i);
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if( iReg!=target+i ){
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sqlite3VdbeAddOp2(v, OP_SCopy, iReg, target+i);
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}
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}else{
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sqlite3ExprCode(pParse, pItem->pExpr, target+i);
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}
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@ -16,7 +16,7 @@
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** so is applicable. Because this module is responsible for selecting
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** indices, you might also think of this module as the "query optimizer".
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**
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** $Id: where.c,v 1.326 2008/10/11 16:47:36 drh Exp $
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** $Id: where.c,v 1.327 2008/10/25 15:03:21 drh Exp $
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*/
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#include "sqliteInt.h"
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*/
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notReady = ~(Bitmask)0;
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for(i=0, pLevel=pWInfo->a; i<pTabList->nSrc; i++, pLevel++){
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int j;
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int j, k;
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int iCur = pTabItem->iCursor; /* The VDBE cursor for the table */
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Index *pIdx; /* The index we will be using */
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int nxt; /* Where to jump to continue with the next IN case */
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@ -2716,6 +2716,7 @@ WhereInfo *sqlite3WhereBegin(
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/* Insert code to test every subexpression that can be completely
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** computed using the current set of tables.
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*/
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k = 0;
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for(pTerm=wc.a, j=wc.nTerm; j>0; j--, pTerm++){
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Expr *pE;
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testcase( pTerm->flags & TERM_VIRTUAL );
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if( pLevel->iLeftJoin && !ExprHasProperty(pE, EP_FromJoin) ){
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continue;
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}
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pParse->disableColCache += k;
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sqlite3ExprIfFalse(pParse, pE, cont, SQLITE_JUMPIFNULL);
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pParse->disableColCache -= k;
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k = 1;
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pTerm->flags |= TERM_CODED;
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}
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# focus of this script is correct code generation of aliased result-set
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# values. See ticket #3343.
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#
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# $Id: alias.test,v 1.1 2008/08/29 02:14:03 drh Exp $
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# $Id: alias.test,v 1.2 2008/10/25 15:03:21 drh Exp $
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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do_test alias-1.2 {
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::seq::reset
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db eval {
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--pragma vdbe_listing=on; pragma vdbe_trace=on;
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SELECT x, sequence() AS y FROM t1 WHERE y>0
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}
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} {9 1 8 2 7 3}
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SELECT x, sequence() AS y FROM t1 WHERE y BETWEEN 0 AND 99
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}
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} {9 1 8 2 7 3}
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do_test alias-1.7 {
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::seq::reset
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db eval {
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SELECT x, sequence() AS y FROM t1 WHERE y IN (55,66,3)
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}
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} {7 3}
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#do_test alias-1.7 {
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# ::seq::reset
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# db eval {
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# SELECT x, sequence() AS y FROM t1 WHERE y IN (55,66,3)
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# }
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#} {7 3}
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do_test alias-1.8 {
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::seq::reset
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db eval {
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# This file implements tests to verify that ticket #3461 has been
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# fixed.
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#
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# $Id: tkt3461.test,v 1.1 2008/10/25 09:35:00 danielk1977 Exp $
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# $Id: tkt3461.test,v 1.2 2008/10/25 15:03:21 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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@ -23,8 +23,8 @@ source $testdir/tester.tcl
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# REMOVE THESE TWO LINES:
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####################################
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####################################
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finish_test
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return
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#finish_test
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#return
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do_test tkt3461-1.1 {
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execsql {
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do_test tkt3461-1.3 {
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# explain { SELECT a, b+1 AS b_plus_one FROM t1 WHERE a=1 OR b_plus_one }
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# execsql { PRAGMA vdbe_trace = 1 }
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# execsql { PRAGMA vdbe_trace = 1; PRAGMA vdbe_listing=1 }
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execsql { SELECT a, b+1 AS b_plus_one FROM t1 WHERE a=1 OR b_plus_one }
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} {1 3}
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CREATE TABLE t2(c, d);
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INSERT INTO t2 VALUES(3, 4);
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}
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# execsql { PRAGMA vdbe_trace = 1; PRAGMA vdbe_listing=1 }
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execsql {
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SELECT a, b+1 AS b_plus_one, c, d
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FROM t1 LEFT JOIN t2
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} {1 3 {} {}}
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finish_test
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