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Fix the ORDER BY optimization with IN constraints when the RHS of the

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IN constraint is a descending index.

FossilOrigin-Name: 62316ebaca933f7e5df2018e8360a2b74234f30a
This commit is contained in:
drh 2013-03-12 20:38:51 +00:00
parent d383216383
commit 1ccce44937
5 changed files with 20 additions and 16 deletions
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16
manifest
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@ -1,5 +1,5 @@
C Revise\sthe\spatch\sto\smake\sit\seasier\sto\sunderstand.
D 2013-03-12T18:49:25.514
C Fix\sthe\sORDER\sBY\soptimization\swith\sIN\sconstraints\swhen\sthe\sRHS\sof\sthe\nIN\sconstraint\sis\sa\sdescending\sindex.
D 2013-03-12T20:38:51.980
F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
F Makefile.in 9a804abbd3cae82d196e4d33aba13239e32522a5
F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@ -130,7 +130,7 @@ F src/complete.c dc1d136c0feee03c2f7550bafc0d29075e36deac
F src/ctime.c 72a70dcfda75d3a1f81041ce4573e7afddcd8e4e
F src/date.c 067a81c9942c497aafd2c260e13add8a7d0c7dd4
F src/delete.c aeabdabeeeaa0584127f291baa9617153d334778
F src/expr.c a23b4aac2a455b2e76b55bef5dcfbe62b665375c
F src/expr.c d488bb60e54c9305d9fca1fa6fcc7bfbd23b13a2
F src/fault.c 160a0c015b6c2629d3899ed2daf63d75754a32bb
F src/fkey.c e16942bd5c8a868ac53287886464a5ed0e72b179
F src/func.c 48987c025d69399f59a1c2a553cea5da41bf105d
@ -179,7 +179,7 @@ F src/shell.c 7c41bfcd9e5bf9d96b9215f79b03a5b2b44a3bca
F src/sqlite.h.in 31045976254225e6bf046a96e87b40fa4c1d55e4
F src/sqlite3.rc fea433eb0a59f4c9393c8e6d76a6e2596b1fe0c0
F src/sqlite3ext.h 7183ab832e23db0f934494f16928da127a571d75
F src/sqliteInt.h 59477c6ddb25e7ed8d8b67f4c58ded254371182e
F src/sqliteInt.h 0f8f05ee4db4ba9120b38f7a3992b325698f6e8a
F src/sqliteLimit.h 164b0e6749d31e0daa1a4589a169d31c0dec7b3d
F src/status.c bedc37ec1a6bb9399944024d63f4c769971955a9
F src/table.c 2cd62736f845d82200acfa1287e33feb3c15d62e
@ -252,7 +252,7 @@ F src/vtab.c b05e5f1f4902461ba9f5fc49bb7eb7c3a0741a83
F src/wal.c f5c7b5027d0ed0e9bc9afeb4a3a8dfea762ec7d2
F src/wal.h 29c197540b19044e6cd73487017e5e47a1d3dac6
F src/walker.c 3d75ba73de15e0f8cd0737643badbeb0e002f07b
F src/where.c 494da8b32d3d616cf82de5fde00bd9e05a827927
F src/where.c 6fdacd2cd56995aaef80209f2697d97a92d6a96f
F test/8_3_names.test 631ea964a3edb091cf73c3b540f6bcfdb36ce823
F test/aggerror.test a867e273ef9e3d7919f03ef4f0e8c0d2767944f2
F test/aggnested.test 45c0201e28045ad38a530b5a144b73cd4aa2cfd6
@ -1038,7 +1038,7 @@ F tool/vdbe-compress.tcl f12c884766bd14277f4fcedcae07078011717381
F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
F tool/win/sqlite.vsix 97894c2790eda7b5bce3cc79cb2a8ec2fde9b3ac
P 723c144c76fc171e5d19072d6d42a08013921ec6
R 8845ff38c1d7ead5133653a3959bc6c8
P 3ce7eb0265b5be4e23264ae41332b947011ff1ad
R 18267d07fe1bd58129b86fe1181a82df
U drh
Z d1fe748b8afa7deacbc6c45434b31b72
Z f2422d1eba1fcbdba1a4cf32638de827

2
manifest.uuid
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@ -1 +1 @@
3ce7eb0265b5be4e23264ae41332b947011ff1ad
62316ebaca933f7e5df2018e8360a2b74234f30a

12
src/expr.c
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@ -1456,10 +1456,11 @@ int sqlite3CodeOnce(Parse *pParse){
**
** The returned value of this function indicates the b-tree type, as follows:
**
** IN_INDEX_ROWID - The cursor was opened on a database table.
** IN_INDEX_INDEX - The cursor was opened on a database index.
** IN_INDEX_EPH - The cursor was opened on a specially created and
** populated epheremal table.
** IN_INDEX_ROWID - The cursor was opened on a database table.
** IN_INDEX_INDEX_ASC - The cursor was opened on an ascending index.
** IN_INDEX_INDEX_DESC - The cursor was opened on a descending index.
** IN_INDEX_EPH - The cursor was opened on a specially created and
** populated epheremal table.
**
** An existing b-tree might be used if the RHS expression pX is a simple
** subquery such as:
@ -1582,7 +1583,8 @@ int sqlite3FindInIndex(Parse *pParse, Expr *pX, int *prNotFound){
sqlite3VdbeAddOp4(v, OP_OpenRead, iTab, pIdx->tnum, iDb,
pKey,P4_KEYINFO_HANDOFF);
VdbeComment((v, "%s", pIdx->zName));
eType = IN_INDEX_INDEX;
assert( IN_INDEX_INDEX_DESC == IN_INDEX_INDEX_ASC+1 );
eType = IN_INDEX_INDEX_ASC + pIdx->aSortOrder[0];
sqlite3VdbeJumpHere(v, iAddr);
if( prNotFound && !pTab->aCol[iCol].notNull ){

3
src/sqliteInt.h
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@ -3263,7 +3263,8 @@ const char *sqlite3JournalModename(int);
#define IN_INDEX_ROWID 1
#define IN_INDEX_EPH 2
#define IN_INDEX_INDEX 3
#define IN_INDEX_INDEX_ASC 3
#define IN_INDEX_INDEX_DESC 4
int sqlite3FindInIndex(Parse *, Expr *, int*);
#ifdef SQLITE_ENABLE_ATOMIC_WRITE

3
src/where.c
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@ -3799,11 +3799,12 @@ static int codeEqualityTerm(
if( (pLevel->plan.wsFlags & WHERE_INDEXED)!=0
&& pLevel->plan.u.pIdx->aSortOrder[iEq]
){
bRev = 1 - bRev;
bRev = !bRev;
}
assert( pX->op==TK_IN );
iReg = iTarget;
eType = sqlite3FindInIndex(pParse, pX, 0);
if( eType==IN_INDEX_INDEX_DESC ) bRev = !bRev;
iTab = pX->iTable;
sqlite3VdbeAddOp2(v, bRev ? OP_Last : OP_Rewind, iTab, 0);
assert( pLevel->plan.wsFlags & WHERE_IN_ABLE );