mirror of https://github.com/sqlite/sqlite
Miscellaneous code cleanup. (CVS 3143)
FossilOrigin-Name: 8f60139f688903f0e635b0a904ab9ca401fbe71f
This commit is contained in:
drh
parent
b73857ff4d
commit
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20
manifest
20
manifest
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@ -1,5 +1,5 @@
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C Code\sand\scomment\scleanup\sfor\sthe\ssorting\soptimization\sof\sthe\sprevious\scheck-in.\s(CVS\s3142)
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D 2006-03-17T00:26:00
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C Miscellaneous\scode\scleanup.\s(CVS\s3143)
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D 2006-03-17T13:56:34
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F Makefile.in 5d8dff443383918b700e495de42ec65bc1c8865b
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F Makefile.linux-gcc 74ba0eadf88748a9ce3fd03d2a3ede2e6715baec
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F README 9c4e2d6706bdcc3efdd773ce752a8cdab4f90028
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@ -42,7 +42,7 @@ F src/complete.c 7d1a44be8f37de125fcafd3d3a018690b3799675
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F src/date.c cd2bd5d1ebc6fa12d6312f69789ae5b0a2766f2e
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F src/delete.c 2dea1a83e6ef534346e74fd03114d3a7b16f08fc
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F src/experimental.c 1b2d1a6cd62ecc39610e97670332ca073c50792b
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F src/expr.c 105e8e17babd4dec832d4a0c88bea12ec074cbbe
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F src/expr.c c85d7bee7d8e3184e00166c2c2ab6edd57b60486
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F src/func.c 380f2f8e555ccbf899e65f01475c4ac13c478dc2
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F src/hash.c 449f3d6620193aa557f5d86cbc5cc6b87702b185
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F src/hash.h 1b3f7e2609141fd571f62199fc38687d262e9564
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@ -66,11 +66,11 @@ F src/pragma.c 27d5e395c5d950931c7ac4fe610e7c2993e2fa55
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F src/prepare.c 6afd730cc8851c0920b5f9050294646b1c2ab28c
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F src/printf.c 341e488b549b1a41f83b05a69ce1d7a8258b624c
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F src/random.c d40f8d356cecbd351ccfab6eaedd7ec1b54f5261
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F src/select.c c95d5cd4331f68d8de947586edb06dc710167317
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F src/select.c eefb46a67c8d154aa87e9fad2ffb0671f1fe4027
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F src/server.c 087b92a39d883e3fa113cae259d64e4c7438bc96
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F src/shell.c 7a4b16f85d8f6f25d917cdc3d0f7e18f84867adf
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F src/sqlite.h.in 0bf6f03f9a14dde5f3a4f87471840803acaa4497
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F src/sqliteInt.h dba7385fa5a03148ffcf44536d65e263e07bb2e3
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F src/sqliteInt.h 18a99e57fd6c8fc4a309107230bcb05556f2194e
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F src/table.c f64ec4fbfe333f8df925bc6ba494f55e05b0e75e
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F src/tclsqlite.c d20bdf1822c47e367f5acd37823ffe67df40301c
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F src/test1.c d1f210f3a295670e5d82d620bea46fabc73bb0ea
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@ -90,10 +90,10 @@ F src/utf.c 1d51225bce1ea8d1978e8ab28e862a0c12c7a8e8
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F src/util.c 59389ed717f0fa9d8023b3f482ba09dcf41343a8
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F src/vacuum.c 5b37d0f436f8e1ffacd17934e44720b38d2247f9
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F src/vdbe.c dcc469dabef9462b3e8bc77193f83a57f3084363
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F src/vdbe.h 80ba1c391ec28180dd07a630577f50b22c2062da
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F src/vdbe.h 44ff995a8b4e87016794095273e9e7300f0001bb
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F src/vdbeInt.h 85cd5f81d38edb1b8f4786f407c77a7a3ba636fb
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F src/vdbeapi.c 7dc662e7c905ce666bb506dced932e0307115cbf
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F src/vdbeaux.c 2ee7d951161769bf3429df2a9cd2c4f2e358807e
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F src/vdbeaux.c 4002e6b19d7c9719cb81f9797316b9ad118e4370
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F src/vdbefifo.c 9efb94c8c3f4c979ebd0028219483f88e57584f5
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F src/vdbemem.c 5f0afe3b92bb2c037f8d5d697f7c151fa50783a3
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F src/where.c 39af47e7f48be8df8a14a5965a38326bccf8eeed
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@ -355,7 +355,7 @@ F www/tclsqlite.tcl bb0d1357328a42b1993d78573e587c6dcbc964b9
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F www/vdbe.tcl 87a31ace769f20d3627a64fa1fade7fed47b90d0
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F www/version3.tcl 890248cf7b70e60c383b0e84d77d5132b3ead42b
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F www/whentouse.tcl 97e2b5cd296f7d8057e11f44427dea8a4c2db513
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P 6b3717aeb4ac45a433f2a30bdd0264ed728676e1
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R f6f3e7e6d067c9a94240a0959ac790cf
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P f3fbe72733b49264a6e0a91bf65c7fd80c7b65ea
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R 7b1aa054fc6b49f4e8c9600b3bfb5da8
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U drh
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Z 6dcf6a197f2543f12524c83228a1e433
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Z 586be5c0c2d47198993602b46076379e
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@ -1 +1 @@
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f3fbe72733b49264a6e0a91bf65c7fd80c7b65ea
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8f60139f688903f0e635b0a904ab9ca401fbe71f
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@ -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 1.256 2006/03/06 20:55:46 drh Exp $
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** $Id: expr.c,v 1.257 2006/03/17 13:56:34 drh Exp $
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*/
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#include "sqliteInt.h"
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#include <ctype.h>
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@ -1381,11 +1381,7 @@ void sqlite3CodeSubselect(Parse *pParse, Expr *pExpr){
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** expression we need to rerun this code each time.
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*/
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if( testAddr>0 && !sqlite3ExprIsConstant(pE2) ){
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VdbeOp *aOp = sqlite3VdbeGetOp(v, testAddr-1);
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int j;
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for(j=0; j<3; j++){
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aOp[j].opcode = OP_Noop;
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}
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sqlite3VdbeChangeToNoop(v, testAddr-1, 3);
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testAddr = 0;
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}
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41
src/select.c
41
src/select.c
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@ -12,7 +12,7 @@
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** This file contains C code routines that are called by the parser
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** to handle SELECT statements in SQLite.
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**
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** $Id: select.c,v 1.308 2006/03/17 00:04:03 drh Exp $
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** $Id: select.c,v 1.309 2006/03/17 13:56:34 drh Exp $
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*/
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#include "sqliteInt.h"
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@ -411,22 +411,18 @@ static void codeOffset(
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** seen combinations of the N values. A new entry is made in iTab
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** if the current N values are new.
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**
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** A jump to addrRepeat is made and the K values are popped from the
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** A jump to addrRepeat is made and the N+1 values are popped from the
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** stack if the top N elements are not distinct.
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*/
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static void codeDistinct(
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Vdbe *v, /* Generate code into this VM */
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int iTab, /* A sorting index used to test for distinctness */
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int addrRepeat, /* Jump to here if not distinct */
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int N, /* The top N elements of the stack must be distinct */
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int K /* Pop K elements from the stack if indistinct */
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int N /* The top N elements of the stack must be distinct */
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){
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#if NULL_ALWAYS_DISTINCT
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sqlite3VdbeAddOp(v, OP_IsNull, -N, sqlite3VdbeCurrentAddr(v)+6);
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#endif
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sqlite3VdbeAddOp(v, OP_MakeRecord, -N, 0);
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sqlite3VdbeAddOp(v, OP_Distinct, iTab, sqlite3VdbeCurrentAddr(v)+3);
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sqlite3VdbeAddOp(v, OP_Pop, K, 0);
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sqlite3VdbeAddOp(v, OP_Pop, N+1, 0);
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sqlite3VdbeAddOp(v, OP_Goto, 0, addrRepeat);
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VdbeComment((v, "# skip indistinct records"));
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sqlite3VdbeAddOp(v, OP_IdxInsert, iTab, 0);
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@ -487,8 +483,9 @@ static int selectInnerLoop(
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** part of the result.
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*/
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if( hasDistinct ){
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int n = pEList->nExpr;
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codeDistinct(v, distinct, iContinue, n, n+1);
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assert( pEList!=0 );
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assert( pEList->nExpr==nColumn );
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codeDistinct(v, distinct, iContinue, nColumn);
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if( pOrderBy==0 ){
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codeOffset(v, p, iContinue, nColumn);
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}
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@ -500,7 +497,7 @@ static int selectInnerLoop(
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*/
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#ifndef SQLITE_OMIT_COMPOUND_SELECT
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case SRT_Union: {
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sqlite3VdbeAddOp(v, OP_MakeRecord, nColumn, NULL_ALWAYS_DISTINCT);
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sqlite3VdbeAddOp(v, OP_MakeRecord, nColumn, 0);
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if( aff ){
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sqlite3VdbeChangeP3(v, -1, aff, P3_STATIC);
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}
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*/
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case SRT_Except: {
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int addr;
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addr = sqlite3VdbeAddOp(v, OP_MakeRecord, nColumn, NULL_ALWAYS_DISTINCT);
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addr = sqlite3VdbeAddOp(v, OP_MakeRecord, nColumn, 0);
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sqlite3VdbeChangeP3(v, -1, aff, P3_STATIC);
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sqlite3VdbeAddOp(v, OP_NotFound, iParm, addr+3);
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sqlite3VdbeAddOp(v, OP_Delete, iParm, 0);
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@ -1546,20 +1543,6 @@ static void createSortingIndex(Parse *pParse, Select *p, ExprList *pOrderBy){
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}
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}
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/*
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** The opcode at addr is an OP_OpenVirtual that created a sorting
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** index tha we ended up not needing. This routine changes that
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** opcode to OP_Noop.
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*/
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static void uncreateSortingIndex(Parse *pParse, int addr){
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Vdbe *v = pParse->pVdbe;
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VdbeOp *pOp = sqlite3VdbeGetOp(v, addr);
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sqlite3VdbeChangeP3(v, addr, 0, 0);
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pOp->opcode = OP_Noop;
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pOp->p1 = 0;
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pOp->p2 = 0;
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}
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#ifndef SQLITE_OMIT_COMPOUND_SELECT
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/*
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** Return the appropriate collating sequence for the iCol-th column of
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if( pF->iDistinct>=0 ){
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addrNext = sqlite3VdbeMakeLabel(v);
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assert( nArg==1 );
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codeDistinct(v, pF->iDistinct, addrNext, 1, 2);
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codeDistinct(v, pF->iDistinct, addrNext, 1);
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}
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if( pF->pFunc->needCollSeq ){
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CollSeq *pColl = 0;
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** into an OP_Noop.
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*/
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if( addrSortIndex>=0 && pOrderBy==0 ){
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uncreateSortingIndex(pParse, addrSortIndex);
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sqlite3VdbeChangeToNoop(v, addrSortIndex, 1);
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p->addrOpenVirt[2] = -1;
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}
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@ -3230,7 +3213,7 @@ int sqlite3Select(
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sqlite3VdbeAddOp(v, OP_Next, sAggInfo.sortingIdx, addrTopOfLoop);
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}else{
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sqlite3WhereEnd(pWInfo);
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uncreateSortingIndex(pParse, addrSortingIdx);
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sqlite3VdbeChangeToNoop(v, addrSortingIdx, 1);
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}
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/* Output the final row of result
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*************************************************************************
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** Internal interface definitions for SQLite.
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**
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** @(#) $Id: sqliteInt.h,v 1.490 2006/03/17 00:04:04 drh Exp $
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** @(#) $Id: sqliteInt.h,v 1.491 2006/03/17 13:56:34 drh Exp $
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*/
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#ifndef _SQLITEINT_H_
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#define _SQLITEINT_H_
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#define OMIT_TEMPDB 0
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#endif
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/*
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** If the following macro is set to 1, then NULL values are considered
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** distinct for the SELECT DISTINCT statement and for UNION or EXCEPT
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** compound queries. No other SQL database engine (among those tested)
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** works this way except for OCELOT. But the SQL92 spec implies that
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** this is how things should work.
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**
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** If the following macro is set to 0, then NULLs are indistinct for
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** SELECT DISTINCT and for UNION.
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*/
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#define NULL_ALWAYS_DISTINCT 0
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/*
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** If the following macro is set to 1, then NULL values are considered
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** distinct when determining whether or not two entries are the same
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** or VDBE. The VDBE implements an abstract machine that runs a
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** simple program to access and modify the underlying database.
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**
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** $Id: vdbe.h,v 1.101 2006/02/10 03:06:10 danielk1977 Exp $
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** $Id: vdbe.h,v 1.102 2006/03/17 13:56:34 drh Exp $
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*/
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#ifndef _SQLITE_VDBE_H_
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#define _SQLITE_VDBE_H_
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@ -117,6 +117,7 @@ int sqlite3VdbeAddOpList(Vdbe*, int nOp, VdbeOpList const *aOp);
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void sqlite3VdbeChangeP1(Vdbe*, int addr, int P1);
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void sqlite3VdbeChangeP2(Vdbe*, int addr, int P2);
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void sqlite3VdbeJumpHere(Vdbe*, int addr);
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void sqlite3VdbeChangeToNoop(Vdbe*, int addr, int N);
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void sqlite3VdbeChangeP3(Vdbe*, int addr, const char *zP1, int N);
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VdbeOp *sqlite3VdbeGetOp(Vdbe*, int);
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int sqlite3VdbeMakeLabel(Vdbe*);
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}
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/*
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** Change teh P2 operand of instruction addr so that it points to
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** Change the P2 operand of instruction addr so that it points to
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** the address of the next instruction to be coded.
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*/
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void sqlite3VdbeJumpHere(Vdbe *p, int addr){
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@ -395,6 +395,19 @@ static void freeP3(int p3type, void *p3){
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}
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/*
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** Change N opcodes starting at addr to No-ops.
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*/
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void sqlite3VdbeChangeToNoop(Vdbe *p, int addr, int N){
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VdbeOp *pOp = &p->aOp[addr];
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while( N-- ){
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freeP3(pOp->p3type, pOp->p3);
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memset(pOp, 0, sizeof(pOp[0]));
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pOp->opcode = OP_Noop;
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pOp++;
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}
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}
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/*
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** Change the value of the P3 operand for a specific instruction.
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** This routine is useful when a large program is loaded from a
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