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Overview
| Comment: | Use symbolic names XN_ROWID and XN_EXPR in place of the (-1) and (-2) magic numbers in Index.aiColumn[]. Add asserts to help verify that Index.aiColumn[] is always used correctly. Fix one place in FK processing where Index.aiColumn[] was not being used correctly. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
7d272aa62cd4cbbf4b5d04e3b918de27 |
| User & Date: | drh 2015-09-29 17:20:14 |
Context
|
2015-09-30
| ||
| 11:19 | Improve error handling in shell command ".tables". check-in: 31a91ee7 user: dan tags: trunk | |
|
2015-09-29
| ||
| 17:51 |
This condition was not always true after all.....
Change an always-true condition in the virtual table transaction interface into an assert(). Closed-Leaf check-in: 3e15dea5 user: drh tags: mistake | |
| 17:20 | Use symbolic names XN_ROWID and XN_EXPR in place of the (-1) and (-2) magic numbers in Index.aiColumn[]. Add asserts to help verify that Index.aiColumn[] is always used correctly. Fix one place in FK processing where Index.aiColumn[] was not being used correctly. check-in: 7d272aa6 user: drh tags: trunk | |
| 16:47 | Add the sqlite3_index_info.idxFlags field, allowing xBestIndex() implementations to specify to SQLite that a strategy may visit at most one row. Add support for this to fts3/4. Omit the statement journal from virtual table UPDATE and DELETE operations that are guaranteed not to affect more than one row. check-in: a1d08fd3 user: dan tags: trunk | |
Changes
Changes to src/build.c.
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}else{
sortOrderMask = 0; /* Ignore DESC */
}
/* Analyze the list of expressions that form the terms of the index and
** report any errors. In the common case where the expression is exactly
** a table column, store that column in aiColumn[]. For general expressions,
** populate pIndex->aColExpr and store -2 in aiColumn[].
**
** TODO: Issue a warning if two or more columns of the index are identical.
** TODO: Issue a warning if the table primary key is used as part of the
** index key.
*/
for(i=0, pListItem=pList->a; i<pList->nExpr; i++, pListItem++){
Expr *pCExpr; /* The i-th index expression */
................................................................................
ExprList *pCopy = sqlite3ExprListDup(db, pList, 0);
pIndex->aColExpr = pCopy;
if( !db->mallocFailed ){
assert( pCopy!=0 );
pListItem = &pCopy->a[i];
}
}
j = -2;
pIndex->aiColumn[i] = -2;
pIndex->uniqNotNull = 0;
}else{
j = pCExpr->iColumn;
assert( j<=0x7fff );
if( j<0 ){
j = pTab->iPKey;
}else if( pTab->aCol[j].notNull==0 ){
................................................................................
pIndex->azColl[i] = pPk->azColl[j];
pIndex->aSortOrder[i] = pPk->aSortOrder[j];
i++;
}
}
assert( i==pIndex->nColumn );
}else{
pIndex->aiColumn[i] = -1;
pIndex->azColl[i] = "BINARY";
}
sqlite3DefaultRowEst(pIndex);
if( pParse->pNewTable==0 ) estimateIndexWidth(pIndex);
if( pTab==pParse->pNewTable ){
/* This routine has been called to create an automatic index as a
|
| | | | |
3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 .... 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 .... 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 |
}else{
sortOrderMask = 0; /* Ignore DESC */
}
/* Analyze the list of expressions that form the terms of the index and
** report any errors. In the common case where the expression is exactly
** a table column, store that column in aiColumn[]. For general expressions,
** populate pIndex->aColExpr and store XN_EXPR (-2) in aiColumn[].
**
** TODO: Issue a warning if two or more columns of the index are identical.
** TODO: Issue a warning if the table primary key is used as part of the
** index key.
*/
for(i=0, pListItem=pList->a; i<pList->nExpr; i++, pListItem++){
Expr *pCExpr; /* The i-th index expression */
................................................................................
ExprList *pCopy = sqlite3ExprListDup(db, pList, 0);
pIndex->aColExpr = pCopy;
if( !db->mallocFailed ){
assert( pCopy!=0 );
pListItem = &pCopy->a[i];
}
}
j = XN_EXPR;
pIndex->aiColumn[i] = XN_EXPR;
pIndex->uniqNotNull = 0;
}else{
j = pCExpr->iColumn;
assert( j<=0x7fff );
if( j<0 ){
j = pTab->iPKey;
}else if( pTab->aCol[j].notNull==0 ){
................................................................................
pIndex->azColl[i] = pPk->azColl[j];
pIndex->aSortOrder[i] = pPk->aSortOrder[j];
i++;
}
}
assert( i==pIndex->nColumn );
}else{
pIndex->aiColumn[i] = XN_ROWID;
pIndex->azColl[i] = "BINARY";
}
sqlite3DefaultRowEst(pIndex);
if( pParse->pNewTable==0 ) estimateIndexWidth(pIndex);
if( pTab==pParse->pNewTable ){
/* This routine has been called to create an automatic index as a
|
Changes to src/delete.c.
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if( db->flags & SQLITE_CountRows ){
sqlite3VdbeAddOp2(v, OP_AddImm, memCnt, 1);
}
/* Extract the rowid or primary key for the current row */
if( pPk ){
for(i=0; i<nPk; i++){
assert( pPk->aiColumn[i]>=(-1) );
sqlite3ExprCodeGetColumnOfTable(v, pTab, iTabCur,
pPk->aiColumn[i], iPk+i);
}
iKey = iPk;
}else{
iKey = pParse->nMem + 1;
iKey = sqlite3ExprCodeGetColumn(pParse, pTab, -1, iTabCur, iKey, 0);
................................................................................
}
nCol = (prefixOnly && pIdx->uniqNotNull) ? pIdx->nKeyCol : pIdx->nColumn;
regBase = sqlite3GetTempRange(pParse, nCol);
if( pPrior && (regBase!=regPrior || pPrior->pPartIdxWhere) ) pPrior = 0;
for(j=0; j<nCol; j++){
if( pPrior
&& pPrior->aiColumn[j]==pIdx->aiColumn[j]
&& pPrior->aiColumn[j]>=(-1)
){
/* This column was already computed by the previous index */
continue;
}
sqlite3ExprCodeLoadIndexColumn(pParse, pIdx, iDataCur, j, regBase+j);
/* If the column affinity is REAL but the number is an integer, then it
** might be stored in the table as an integer (using a compact
|
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if( db->flags & SQLITE_CountRows ){
sqlite3VdbeAddOp2(v, OP_AddImm, memCnt, 1);
}
/* Extract the rowid or primary key for the current row */
if( pPk ){
for(i=0; i<nPk; i++){
assert( pPk->aiColumn[i]>=0 );
sqlite3ExprCodeGetColumnOfTable(v, pTab, iTabCur,
pPk->aiColumn[i], iPk+i);
}
iKey = iPk;
}else{
iKey = pParse->nMem + 1;
iKey = sqlite3ExprCodeGetColumn(pParse, pTab, -1, iTabCur, iKey, 0);
................................................................................
}
nCol = (prefixOnly && pIdx->uniqNotNull) ? pIdx->nKeyCol : pIdx->nColumn;
regBase = sqlite3GetTempRange(pParse, nCol);
if( pPrior && (regBase!=regPrior || pPrior->pPartIdxWhere) ) pPrior = 0;
for(j=0; j<nCol; j++){
if( pPrior
&& pPrior->aiColumn[j]==pIdx->aiColumn[j]
&& pPrior->aiColumn[j]!=XN_EXPR
){
/* This column was already computed by the previous index */
continue;
}
sqlite3ExprCodeLoadIndexColumn(pParse, pIdx, iDataCur, j, regBase+j);
/* If the column affinity is REAL but the number is an integer, then it
** might be stored in the table as an integer (using a compact
|
Changes to src/expr.c.
2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 |
Parse *pParse, /* The parsing context */
Index *pIdx, /* The index whose column is to be loaded */
int iTabCur, /* Cursor pointing to a table row */
int iIdxCol, /* The column of the index to be loaded */
int regOut /* Store the index column value in this register */
){
i16 iTabCol = pIdx->aiColumn[iIdxCol];
if( iTabCol>=(-1) ){
sqlite3ExprCodeGetColumnOfTable(pParse->pVdbe, pIdx->pTable, iTabCur,
iTabCol, regOut);
return;
}
assert( pIdx->aColExpr );
assert( pIdx->aColExpr->nExpr>iIdxCol );
pParse->iSelfTab = iTabCur;
sqlite3ExprCode(pParse, pIdx->aColExpr->a[iIdxCol].pExpr, regOut);
}
/*
** Generate code to extract the value of the iCol-th column of a table.
*/
void sqlite3ExprCodeGetColumnOfTable(
Vdbe *v, /* The VDBE under construction */
|
| < < < < | | | | > > > > |
2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 |
Parse *pParse, /* The parsing context */
Index *pIdx, /* The index whose column is to be loaded */
int iTabCur, /* Cursor pointing to a table row */
int iIdxCol, /* The column of the index to be loaded */
int regOut /* Store the index column value in this register */
){
i16 iTabCol = pIdx->aiColumn[iIdxCol];
if( iTabCol==XN_EXPR ){
assert( pIdx->aColExpr );
assert( pIdx->aColExpr->nExpr>iIdxCol );
pParse->iSelfTab = iTabCur;
sqlite3ExprCode(pParse, pIdx->aColExpr->a[iIdxCol].pExpr, regOut);
}else{
sqlite3ExprCodeGetColumnOfTable(pParse->pVdbe, pIdx->pTable, iTabCur,
iTabCol, regOut);
}
}
/*
** Generate code to extract the value of the iCol-th column of a table.
*/
void sqlite3ExprCodeGetColumnOfTable(
Vdbe *v, /* The VDBE under construction */
|
Changes to src/fkey.c.
248 249 250 251 252 253 254 255 256 257 258 259 260 261 ... 400 401 402 403 404 405 406 407 408 409 410 411 412 413 ... 608 609 610 611 612 613 614 615 616 617 618 619 620 621 ... 927 928 929 930 931 932 933 934 935 936 937 938 939 940 .... 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 .... 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 |
** the default collation sequences for each column. */
int i, j;
for(i=0; i<nCol; i++){
i16 iCol = pIdx->aiColumn[i]; /* Index of column in parent tbl */
char *zDfltColl; /* Def. collation for column */
char *zIdxCol; /* Name of indexed column */
/* If the index uses a collation sequence that is different from
** the default collation sequence for the column, this index is
** unusable. Bail out early in this case. */
zDfltColl = pParent->aCol[iCol].zColl;
if( !zDfltColl ){
zDfltColl = "BINARY";
}
................................................................................
** none of the child key values are).
*/
if( pTab==pFKey->pFrom && nIncr==1 ){
int iJump = sqlite3VdbeCurrentAddr(v) + nCol + 1;
for(i=0; i<nCol; i++){
int iChild = aiCol[i]+1+regData;
int iParent = pIdx->aiColumn[i]+1+regData;
assert( aiCol[i]!=pTab->iPKey );
if( pIdx->aiColumn[i]==pTab->iPKey ){
/* The parent key is a composite key that includes the IPK column */
iParent = regData;
}
sqlite3VdbeAddOp3(v, OP_Ne, iChild, iJump, iParent); VdbeCoverage(v);
sqlite3VdbeChangeP5(v, SQLITE_JUMPIFNULL);
................................................................................
pNe = sqlite3PExpr(pParse, TK_NE, pLeft, pRight, 0);
}else{
Expr *pEq, *pAll = 0;
Index *pPk = sqlite3PrimaryKeyIndex(pTab);
assert( pIdx!=0 );
for(i=0; i<pPk->nKeyCol; i++){
i16 iCol = pIdx->aiColumn[i];
pLeft = exprTableRegister(pParse, pTab, regData, iCol);
pRight = exprTableColumn(db, pTab, pSrc->a[0].iCursor, iCol);
pEq = sqlite3PExpr(pParse, TK_EQ, pLeft, pRight, 0);
pAll = sqlite3ExprAnd(db, pAll, pEq);
}
pNe = sqlite3PExpr(pParse, TK_NOT, pAll, 0, 0);
}
................................................................................
iCol = pFKey->aCol[0].iFrom;
aiCol = &iCol;
}
for(i=0; i<pFKey->nCol; i++){
if( aiCol[i]==pTab->iPKey ){
aiCol[i] = -1;
}
#ifndef SQLITE_OMIT_AUTHORIZATION
/* Request permission to read the parent key columns. If the
** authorization callback returns SQLITE_IGNORE, behave as if any
** values read from the parent table are NULL. */
if( db->xAuth ){
int rcauth;
char *zCol = pTo->aCol[pIdx ? pIdx->aiColumn[i] : pTo->iPKey].zName;
................................................................................
for(p=pTab->pFKey; p; p=p->pNextFrom){
for(i=0; i<p->nCol; i++) mask |= COLUMN_MASK(p->aCol[i].iFrom);
}
for(p=sqlite3FkReferences(pTab); p; p=p->pNextTo){
Index *pIdx = 0;
sqlite3FkLocateIndex(pParse, pTab, p, &pIdx, 0);
if( pIdx ){
for(i=0; i<pIdx->nKeyCol; i++) mask |= COLUMN_MASK(pIdx->aiColumn[i]);
}
}
}
return mask;
}
................................................................................
Token tToCol; /* Name of column in parent table */
int iFromCol; /* Idx of column in child table */
Expr *pEq; /* tFromCol = OLD.tToCol */
iFromCol = aiCol ? aiCol[i] : pFKey->aCol[0].iFrom;
assert( iFromCol>=0 );
assert( pIdx!=0 || (pTab->iPKey>=0 && pTab->iPKey<pTab->nCol) );
tToCol.z = pTab->aCol[pIdx ? pIdx->aiColumn[i] : pTab->iPKey].zName;
tFromCol.z = pFKey->pFrom->aCol[iFromCol].zName;
tToCol.n = sqlite3Strlen30(tToCol.z);
tFromCol.n = sqlite3Strlen30(tFromCol.z);
/* Create the expression "OLD.zToCol = zFromCol". It is important
|
> > > > > > > | > > |
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** the default collation sequences for each column. */
int i, j;
for(i=0; i<nCol; i++){
i16 iCol = pIdx->aiColumn[i]; /* Index of column in parent tbl */
char *zDfltColl; /* Def. collation for column */
char *zIdxCol; /* Name of indexed column */
if( iCol<0 ) break; /* No foreign keys against expression indexes */
/* If the index uses a collation sequence that is different from
** the default collation sequence for the column, this index is
** unusable. Bail out early in this case. */
zDfltColl = pParent->aCol[iCol].zColl;
if( !zDfltColl ){
zDfltColl = "BINARY";
}
................................................................................
** none of the child key values are).
*/
if( pTab==pFKey->pFrom && nIncr==1 ){
int iJump = sqlite3VdbeCurrentAddr(v) + nCol + 1;
for(i=0; i<nCol; i++){
int iChild = aiCol[i]+1+regData;
int iParent = pIdx->aiColumn[i]+1+regData;
assert( pIdx->aiColumn[i]>=0 );
assert( aiCol[i]!=pTab->iPKey );
if( pIdx->aiColumn[i]==pTab->iPKey ){
/* The parent key is a composite key that includes the IPK column */
iParent = regData;
}
sqlite3VdbeAddOp3(v, OP_Ne, iChild, iJump, iParent); VdbeCoverage(v);
sqlite3VdbeChangeP5(v, SQLITE_JUMPIFNULL);
................................................................................
pNe = sqlite3PExpr(pParse, TK_NE, pLeft, pRight, 0);
}else{
Expr *pEq, *pAll = 0;
Index *pPk = sqlite3PrimaryKeyIndex(pTab);
assert( pIdx!=0 );
for(i=0; i<pPk->nKeyCol; i++){
i16 iCol = pIdx->aiColumn[i];
assert( iCol>=0 );
pLeft = exprTableRegister(pParse, pTab, regData, iCol);
pRight = exprTableColumn(db, pTab, pSrc->a[0].iCursor, iCol);
pEq = sqlite3PExpr(pParse, TK_EQ, pLeft, pRight, 0);
pAll = sqlite3ExprAnd(db, pAll, pEq);
}
pNe = sqlite3PExpr(pParse, TK_NOT, pAll, 0, 0);
}
................................................................................
iCol = pFKey->aCol[0].iFrom;
aiCol = &iCol;
}
for(i=0; i<pFKey->nCol; i++){
if( aiCol[i]==pTab->iPKey ){
aiCol[i] = -1;
}
assert( pIdx==0 || pIdx->aiColumn[i]>=0 );
#ifndef SQLITE_OMIT_AUTHORIZATION
/* Request permission to read the parent key columns. If the
** authorization callback returns SQLITE_IGNORE, behave as if any
** values read from the parent table are NULL. */
if( db->xAuth ){
int rcauth;
char *zCol = pTo->aCol[pIdx ? pIdx->aiColumn[i] : pTo->iPKey].zName;
................................................................................
for(p=pTab->pFKey; p; p=p->pNextFrom){
for(i=0; i<p->nCol; i++) mask |= COLUMN_MASK(p->aCol[i].iFrom);
}
for(p=sqlite3FkReferences(pTab); p; p=p->pNextTo){
Index *pIdx = 0;
sqlite3FkLocateIndex(pParse, pTab, p, &pIdx, 0);
if( pIdx ){
for(i=0; i<pIdx->nKeyCol; i++){
assert( pIdx->aiColumn[i]>=0 );
mask |= COLUMN_MASK(pIdx->aiColumn[i]);
}
}
}
}
return mask;
}
................................................................................
Token tToCol; /* Name of column in parent table */
int iFromCol; /* Idx of column in child table */
Expr *pEq; /* tFromCol = OLD.tToCol */
iFromCol = aiCol ? aiCol[i] : pFKey->aCol[0].iFrom;
assert( iFromCol>=0 );
assert( pIdx!=0 || (pTab->iPKey>=0 && pTab->iPKey<pTab->nCol) );
assert( pIdx==0 || pIdx->aiColumn[i]>=0 );
tToCol.z = pTab->aCol[pIdx ? pIdx->aiColumn[i] : pTab->iPKey].zName;
tFromCol.z = pFKey->pFrom->aCol[iFromCol].zName;
tToCol.n = sqlite3Strlen30(tToCol.z);
tFromCol.n = sqlite3Strlen30(tFromCol.z);
/* Create the expression "OLD.zToCol = zFromCol". It is important
|
Changes to src/insert.c.
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db->mallocFailed = 1;
return 0;
}
for(n=0; n<pIdx->nColumn; n++){
i16 x = pIdx->aiColumn[n];
if( x>=0 ){
pIdx->zColAff[n] = pTab->aCol[x].affinity;
}else if( x==(-1) ){
pIdx->zColAff[n] = SQLITE_AFF_INTEGER;
}else{
char aff;
assert( x==(-2) );
assert( pIdx->aColExpr!=0 );
aff = sqlite3ExprAffinity(pIdx->aColExpr->a[n].pExpr);
if( aff==0 ) aff = SQLITE_AFF_BLOB;
pIdx->zColAff[n] = aff;
}
}
pIdx->zColAff[n] = 0;
................................................................................
/* Create a record for this index entry as it should appear after
** the insert or update. Store that record in the aRegIdx[ix] register
*/
regIdx = sqlite3GetTempRange(pParse, pIdx->nColumn);
for(i=0; i<pIdx->nColumn; i++){
int iField = pIdx->aiColumn[i];
int x;
if( iField==(-2) ){
pParse->ckBase = regNewData+1;
sqlite3ExprCode(pParse, pIdx->aColExpr->a[i].pExpr, regIdx+i);
pParse->ckBase = 0;
VdbeComment((v, "%s column %d", pIdx->zName, i));
}else{
if( iField==(-1) || iField==pTab->iPKey ){
if( regRowid==regIdx+i ) continue; /* ROWID already in regIdx+i */
x = regNewData;
regRowid = pIdx->pPartIdxWhere ? -1 : regIdx+i;
}else{
x = iField + regNewData + 1;
}
sqlite3VdbeAddOp2(v, OP_SCopy, x, regIdx+i);
................................................................................
}
}else{
int x;
/* Extract the PRIMARY KEY from the end of the index entry and
** store it in registers regR..regR+nPk-1 */
if( pIdx!=pPk ){
for(i=0; i<pPk->nKeyCol; i++){
x = sqlite3ColumnOfIndex(pIdx, pPk->aiColumn[i]);
sqlite3VdbeAddOp3(v, OP_Column, iThisCur, x, regR+i);
VdbeComment((v, "%s.%s", pTab->zName,
pTab->aCol[pPk->aiColumn[i]].zName));
}
}
if( isUpdate ){
................................................................................
int addrJump = sqlite3VdbeCurrentAddr(v)+pPk->nKeyCol;
int op = OP_Ne;
int regCmp = (IsPrimaryKeyIndex(pIdx) ? regIdx : regR);
for(i=0; i<pPk->nKeyCol; i++){
char *p4 = (char*)sqlite3LocateCollSeq(pParse, pPk->azColl[i]);
x = pPk->aiColumn[i];
if( i==(pPk->nKeyCol-1) ){
addrJump = addrUniqueOk;
op = OP_Eq;
}
sqlite3VdbeAddOp4(v, op,
regOldData+1+x, addrJump, regCmp+i, p4, P4_COLLSEQ
);
................................................................................
if( pDest->onError!=pSrc->onError ){
return 0; /* Different conflict resolution strategies */
}
for(i=0; i<pSrc->nKeyCol; i++){
if( pSrc->aiColumn[i]!=pDest->aiColumn[i] ){
return 0; /* Different columns indexed */
}
if( pSrc->aiColumn[i]==(-2) ){
assert( pSrc->aColExpr!=0 && pDest->aColExpr!=0 );
if( sqlite3ExprCompare(pSrc->aColExpr->a[i].pExpr,
pDest->aColExpr->a[i].pExpr, -1)!=0 ){
return 0; /* Different expressions in the index */
}
}
if( pSrc->aSortOrder[i]!=pDest->aSortOrder[i] ){
|
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db->mallocFailed = 1;
return 0;
}
for(n=0; n<pIdx->nColumn; n++){
i16 x = pIdx->aiColumn[n];
if( x>=0 ){
pIdx->zColAff[n] = pTab->aCol[x].affinity;
}else if( x==XN_ROWID ){
pIdx->zColAff[n] = SQLITE_AFF_INTEGER;
}else{
char aff;
assert( x==XN_EXPR );
assert( pIdx->aColExpr!=0 );
aff = sqlite3ExprAffinity(pIdx->aColExpr->a[n].pExpr);
if( aff==0 ) aff = SQLITE_AFF_BLOB;
pIdx->zColAff[n] = aff;
}
}
pIdx->zColAff[n] = 0;
................................................................................
/* Create a record for this index entry as it should appear after
** the insert or update. Store that record in the aRegIdx[ix] register
*/
regIdx = sqlite3GetTempRange(pParse, pIdx->nColumn);
for(i=0; i<pIdx->nColumn; i++){
int iField = pIdx->aiColumn[i];
int x;
if( iField==XN_EXPR ){
pParse->ckBase = regNewData+1;
sqlite3ExprCode(pParse, pIdx->aColExpr->a[i].pExpr, regIdx+i);
pParse->ckBase = 0;
VdbeComment((v, "%s column %d", pIdx->zName, i));
}else{
if( iField==XN_ROWID || iField==pTab->iPKey ){
if( regRowid==regIdx+i ) continue; /* ROWID already in regIdx+i */
x = regNewData;
regRowid = pIdx->pPartIdxWhere ? -1 : regIdx+i;
}else{
x = iField + regNewData + 1;
}
sqlite3VdbeAddOp2(v, OP_SCopy, x, regIdx+i);
................................................................................
}
}else{
int x;
/* Extract the PRIMARY KEY from the end of the index entry and
** store it in registers regR..regR+nPk-1 */
if( pIdx!=pPk ){
for(i=0; i<pPk->nKeyCol; i++){
assert( pPk->aiColumn[i]>=0 );
x = sqlite3ColumnOfIndex(pIdx, pPk->aiColumn[i]);
sqlite3VdbeAddOp3(v, OP_Column, iThisCur, x, regR+i);
VdbeComment((v, "%s.%s", pTab->zName,
pTab->aCol[pPk->aiColumn[i]].zName));
}
}
if( isUpdate ){
................................................................................
int addrJump = sqlite3VdbeCurrentAddr(v)+pPk->nKeyCol;
int op = OP_Ne;
int regCmp = (IsPrimaryKeyIndex(pIdx) ? regIdx : regR);
for(i=0; i<pPk->nKeyCol; i++){
char *p4 = (char*)sqlite3LocateCollSeq(pParse, pPk->azColl[i]);
x = pPk->aiColumn[i];
assert( x>=0 );
if( i==(pPk->nKeyCol-1) ){
addrJump = addrUniqueOk;
op = OP_Eq;
}
sqlite3VdbeAddOp4(v, op,
regOldData+1+x, addrJump, regCmp+i, p4, P4_COLLSEQ
);
................................................................................
if( pDest->onError!=pSrc->onError ){
return 0; /* Different conflict resolution strategies */
}
for(i=0; i<pSrc->nKeyCol; i++){
if( pSrc->aiColumn[i]!=pDest->aiColumn[i] ){
return 0; /* Different columns indexed */
}
if( pSrc->aiColumn[i]==XN_EXPR ){
assert( pSrc->aColExpr!=0 && pDest->aColExpr!=0 );
if( sqlite3ExprCompare(pSrc->aColExpr->a[i].pExpr,
pDest->aColExpr->a[i].pExpr, -1)!=0 ){
return 0; /* Different expressions in the index */
}
}
if( pSrc->aSortOrder[i]!=pDest->aSortOrder[i] ){
|
Changes to src/pragma.c.
1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 |
** or (2) the next entry has a different key */
if( IsUniqueIndex(pIdx) ){
int uniqOk = sqlite3VdbeMakeLabel(v);
int jmp6;
int kk;
for(kk=0; kk<pIdx->nKeyCol; kk++){
int iCol = pIdx->aiColumn[kk];
assert( iCol!=(-1) && iCol<pTab->nCol );
if( iCol>=0 && pTab->aCol[iCol].notNull ) continue;
sqlite3VdbeAddOp2(v, OP_IsNull, r1+kk, uniqOk);
VdbeCoverage(v);
}
jmp6 = sqlite3VdbeAddOp1(v, OP_Next, iIdxCur+j); VdbeCoverage(v);
sqlite3VdbeGoto(v, uniqOk);
sqlite3VdbeJumpHere(v, jmp6);
|
| |
1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 |
** or (2) the next entry has a different key */
if( IsUniqueIndex(pIdx) ){
int uniqOk = sqlite3VdbeMakeLabel(v);
int jmp6;
int kk;
for(kk=0; kk<pIdx->nKeyCol; kk++){
int iCol = pIdx->aiColumn[kk];
assert( iCol!=XN_ROWID && iCol<pTab->nCol );
if( iCol>=0 && pTab->aCol[iCol].notNull ) continue;
sqlite3VdbeAddOp2(v, OP_IsNull, r1+kk, uniqOk);
VdbeCoverage(v);
}
jmp6 = sqlite3VdbeAddOp1(v, OP_Next, iIdxCur+j); VdbeCoverage(v);
sqlite3VdbeGoto(v, uniqOk);
sqlite3VdbeJumpHere(v, jmp6);
|
Changes to src/sqliteInt.h.
1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 |
/* Return true if index X is a PRIMARY KEY index */
#define IsPrimaryKeyIndex(X) ((X)->idxType==SQLITE_IDXTYPE_PRIMARYKEY)
/* Return true if index X is a UNIQUE index */
#define IsUniqueIndex(X) ((X)->onError!=OE_None)
/*
** Each sample stored in the sqlite_stat3 table is represented in memory
** using a structure of this type. See documentation at the top of the
** analyze.c source file for additional information.
*/
struct IndexSample {
void *p; /* Pointer to sampled record */
|
> > > > > > |
1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 |
/* Return true if index X is a PRIMARY KEY index */ #define IsPrimaryKeyIndex(X) ((X)->idxType==SQLITE_IDXTYPE_PRIMARYKEY) /* Return true if index X is a UNIQUE index */ #define IsUniqueIndex(X) ((X)->onError!=OE_None) /* The Index.aiColumn[] values are normally positive integer. But ** there are some negative values that have special meaning: */ #define XN_ROWID (-1) /* Indexed column is the rowid */ #define XN_EXPR (-2) /* Indexed column is an expression */ /* ** Each sample stored in the sqlite_stat3 table is represented in memory ** using a structure of this type. See documentation at the top of the ** analyze.c source file for additional information. */ struct IndexSample { void *p; /* Pointer to sampled record */ |
Changes to src/update.c.
380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 |
addrOpen = sqlite3VdbeAddOp2(v, OP_OpenEphemeral, iEph, nPk);
sqlite3VdbeSetP4KeyInfo(pParse, pPk);
pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, 0, 0,
WHERE_ONEPASS_DESIRED, iIdxCur);
if( pWInfo==0 ) goto update_cleanup;
okOnePass = sqlite3WhereOkOnePass(pWInfo, aiCurOnePass);
for(i=0; i<nPk; i++){
assert( pPk->aiColumn[i]>=(-1) );
sqlite3ExprCodeGetColumnOfTable(v, pTab, iDataCur, pPk->aiColumn[i],
iPk+i);
}
if( okOnePass ){
sqlite3VdbeChangeToNoop(v, addrOpen);
nKey = nPk;
regKey = iPk;
|
| |
380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 |
addrOpen = sqlite3VdbeAddOp2(v, OP_OpenEphemeral, iEph, nPk);
sqlite3VdbeSetP4KeyInfo(pParse, pPk);
pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, 0, 0,
WHERE_ONEPASS_DESIRED, iIdxCur);
if( pWInfo==0 ) goto update_cleanup;
okOnePass = sqlite3WhereOkOnePass(pWInfo, aiCurOnePass);
for(i=0; i<nPk; i++){
assert( pPk->aiColumn[i]>=0 );
sqlite3ExprCodeGetColumnOfTable(v, pTab, iDataCur, pPk->aiColumn[i],
iPk+i);
}
if( okOnePass ){
sqlite3VdbeChangeToNoop(v, addrOpen);
nKey = nPk;
regKey = iPk;
|
Changes to src/vdbeblob.c.
244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 |
}
}
#endif
for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
int j;
for(j=0; j<pIdx->nKeyCol; j++){
/* FIXME: Be smarter about indexes that use expressions */
if( pIdx->aiColumn[j]==iCol || pIdx->aiColumn[j]==(-2) ){
zFault = "indexed";
}
}
}
if( zFault ){
sqlite3DbFree(db, zErr);
zErr = sqlite3MPrintf(db, "cannot open %s column for writing", zFault);
|
| |
244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 |
}
}
#endif
for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
int j;
for(j=0; j<pIdx->nKeyCol; j++){
/* FIXME: Be smarter about indexes that use expressions */
if( pIdx->aiColumn[j]==iCol || pIdx->aiColumn[j]==XN_EXPR ){
zFault = "indexed";
}
}
}
if( zFault ){
sqlite3DbFree(db, zErr);
zErr = sqlite3MPrintf(db, "cannot open %s column for writing", zFault);
|
Changes to src/where.c.
185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 ... 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 ... 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 .... 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 .... 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 .... 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 .... 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 .... 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571 |
WhereClause *pWC; /* Shorthand for pScan->pWC */
WhereTerm *pTerm; /* The term being tested */
int k = pScan->k; /* Where to start scanning */
while( pScan->iEquiv<=pScan->nEquiv ){
iCur = pScan->aiCur[pScan->iEquiv-1];
iColumn = pScan->aiColumn[pScan->iEquiv-1];
if( iColumn==(-2) && pScan->pIdxExpr==0 ) return 0;
while( (pWC = pScan->pWC)!=0 ){
for(pTerm=pWC->a+k; k<pWC->nTerm; k++, pTerm++){
if( pTerm->leftCursor==iCur
&& pTerm->u.leftColumn==iColumn
&& (iColumn!=(-2)
|| sqlite3ExprCompare(pTerm->pExpr->pLeft,pScan->pIdxExpr,iCur)==0)
&& (pScan->iEquiv<=1 || !ExprHasProperty(pTerm->pExpr, EP_FromJoin))
){
if( (pTerm->eOperator & WO_EQUIV)!=0
&& pScan->nEquiv<ArraySize(pScan->aiCur)
&& (pX = sqlite3ExprSkipCollate(pTerm->pExpr->pRight))->op==TK_COLUMN
){
................................................................................
/* memset(pScan, 0, sizeof(*pScan)); */
pScan->pOrigWC = pWC;
pScan->pWC = pWC;
pScan->pIdxExpr = 0;
if( pIdx ){
j = iColumn;
iColumn = pIdx->aiColumn[j];
if( iColumn==(-2) ) pScan->pIdxExpr = pIdx->aColExpr->a[j].pExpr;
}
if( pIdx && iColumn>=0 ){
pScan->idxaff = pIdx->pTable->aCol[iColumn].affinity;
pScan->zCollName = pIdx->azColl[j];
}else{
pScan->idxaff = 0;
pScan->zCollName = 0;
................................................................................
for(i=BMS-1; i<pTable->nCol; i++){
pIdx->aiColumn[n] = i;
pIdx->azColl[n] = "BINARY";
n++;
}
}
assert( n==nKeyCol );
pIdx->aiColumn[n] = -1;
pIdx->azColl[n] = "BINARY";
/* Create the automatic index */
assert( pLevel->iIdxCur>=0 );
pLevel->iIdxCur = pParse->nTab++;
sqlite3VdbeAddOp2(v, OP_OpenAutoindex, pLevel->iIdxCur, nKeyCol+1);
sqlite3VdbeSetP4KeyInfo(pParse, pIdx);
................................................................................
assert( nIn>0 ); /* RHS always has 2 or more terms... The parser
** changes "x IN (?)" into "x=?". */
}else if( eOp & (WO_EQ|WO_IS) ){
int iCol = pProbe->aiColumn[saved_nEq];
pNew->wsFlags |= WHERE_COLUMN_EQ;
assert( saved_nEq==pNew->u.btree.nEq );
if( iCol==(-1) || (iCol>0 && nInMul==0 && saved_nEq==pProbe->nKeyCol-1) ){
if( iCol>=0 && pProbe->uniqNotNull==0 ){
pNew->wsFlags |= WHERE_UNQ_WANTED;
}else{
pNew->wsFlags |= WHERE_ONEROW;
}
}
}else if( eOp & WO_ISNULL ){
................................................................................
if( pExpr->op==TK_COLUMN && pExpr->iTable==iCursor ){
if( pExpr->iColumn<0 ) return 1;
for(jj=0; jj<pIndex->nKeyCol; jj++){
if( pExpr->iColumn==pIndex->aiColumn[jj] ) return 1;
}
}else if( (aColExpr = pIndex->aColExpr)!=0 ){
for(jj=0; jj<pIndex->nKeyCol; jj++){
if( pIndex->aiColumn[jj]!=(-2) ) continue;
if( sqlite3ExprCompare(pExpr,aColExpr->a[jj].pExpr,iCursor)==0 ){
return 1;
}
}
}
}
return 0;
................................................................................
nColumn = 1;
}else if( (pIndex = pLoop->u.btree.pIndex)==0 || pIndex->bUnordered ){
return 0;
}else{
nKeyCol = pIndex->nKeyCol;
nColumn = pIndex->nColumn;
assert( nColumn==nKeyCol+1 || !HasRowid(pIndex->pTable) );
assert( pIndex->aiColumn[nColumn-1]==(-1) || !HasRowid(pIndex->pTable));
isOrderDistinct = IsUniqueIndex(pIndex);
}
/* Loop through all columns of the index and deal with the ones
** that are not constrained by == or IN.
*/
rev = revSet = 0;
................................................................................
** (revIdx) for the j-th column of the index.
*/
if( pIndex ){
iColumn = pIndex->aiColumn[j];
revIdx = pIndex->aSortOrder[j];
if( iColumn==pIndex->pTable->iPKey ) iColumn = -1;
}else{
iColumn = -1;
revIdx = 0;
}
/* An unconstrained column that might be NULL means that this
** WhereLoop is not well-ordered
*/
if( isOrderDistinct
................................................................................
if( pOp->p1!=pLevel->iTabCur ) continue;
if( pOp->opcode==OP_Column ){
int x = pOp->p2;
assert( pIdx->pTable==pTab );
if( !HasRowid(pTab) ){
Index *pPk = sqlite3PrimaryKeyIndex(pTab);
x = pPk->aiColumn[x];
}
x = sqlite3ColumnOfIndex(pIdx, x);
if( x>=0 ){
pOp->p2 = x;
pOp->p1 = pLevel->iIdxCur;
}
assert( (pLoop->wsFlags & WHERE_IDX_ONLY)==0 || x>=0 );
|
| | | | > | > | | > | > |
185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 ... 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 ... 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 .... 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 .... 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 .... 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 .... 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 .... 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 |
WhereClause *pWC; /* Shorthand for pScan->pWC */
WhereTerm *pTerm; /* The term being tested */
int k = pScan->k; /* Where to start scanning */
while( pScan->iEquiv<=pScan->nEquiv ){
iCur = pScan->aiCur[pScan->iEquiv-1];
iColumn = pScan->aiColumn[pScan->iEquiv-1];
if( iColumn==XN_EXPR && pScan->pIdxExpr==0 ) return 0;
while( (pWC = pScan->pWC)!=0 ){
for(pTerm=pWC->a+k; k<pWC->nTerm; k++, pTerm++){
if( pTerm->leftCursor==iCur
&& pTerm->u.leftColumn==iColumn
&& (iColumn!=XN_EXPR
|| sqlite3ExprCompare(pTerm->pExpr->pLeft,pScan->pIdxExpr,iCur)==0)
&& (pScan->iEquiv<=1 || !ExprHasProperty(pTerm->pExpr, EP_FromJoin))
){
if( (pTerm->eOperator & WO_EQUIV)!=0
&& pScan->nEquiv<ArraySize(pScan->aiCur)
&& (pX = sqlite3ExprSkipCollate(pTerm->pExpr->pRight))->op==TK_COLUMN
){
................................................................................
/* memset(pScan, 0, sizeof(*pScan)); */
pScan->pOrigWC = pWC;
pScan->pWC = pWC;
pScan->pIdxExpr = 0;
if( pIdx ){
j = iColumn;
iColumn = pIdx->aiColumn[j];
if( iColumn==XN_EXPR ) pScan->pIdxExpr = pIdx->aColExpr->a[j].pExpr;
}
if( pIdx && iColumn>=0 ){
pScan->idxaff = pIdx->pTable->aCol[iColumn].affinity;
pScan->zCollName = pIdx->azColl[j];
}else{
pScan->idxaff = 0;
pScan->zCollName = 0;
................................................................................
for(i=BMS-1; i<pTable->nCol; i++){
pIdx->aiColumn[n] = i;
pIdx->azColl[n] = "BINARY";
n++;
}
}
assert( n==nKeyCol );
pIdx->aiColumn[n] = XN_ROWID;
pIdx->azColl[n] = "BINARY";
/* Create the automatic index */
assert( pLevel->iIdxCur>=0 );
pLevel->iIdxCur = pParse->nTab++;
sqlite3VdbeAddOp2(v, OP_OpenAutoindex, pLevel->iIdxCur, nKeyCol+1);
sqlite3VdbeSetP4KeyInfo(pParse, pIdx);
................................................................................
assert( nIn>0 ); /* RHS always has 2 or more terms... The parser
** changes "x IN (?)" into "x=?". */
}else if( eOp & (WO_EQ|WO_IS) ){
int iCol = pProbe->aiColumn[saved_nEq];
pNew->wsFlags |= WHERE_COLUMN_EQ;
assert( saved_nEq==pNew->u.btree.nEq );
if( iCol==XN_ROWID
|| (iCol>0 && nInMul==0 && saved_nEq==pProbe->nKeyCol-1)
){
if( iCol>=0 && pProbe->uniqNotNull==0 ){
pNew->wsFlags |= WHERE_UNQ_WANTED;
}else{
pNew->wsFlags |= WHERE_ONEROW;
}
}
}else if( eOp & WO_ISNULL ){
................................................................................
if( pExpr->op==TK_COLUMN && pExpr->iTable==iCursor ){
if( pExpr->iColumn<0 ) return 1;
for(jj=0; jj<pIndex->nKeyCol; jj++){
if( pExpr->iColumn==pIndex->aiColumn[jj] ) return 1;
}
}else if( (aColExpr = pIndex->aColExpr)!=0 ){
for(jj=0; jj<pIndex->nKeyCol; jj++){
if( pIndex->aiColumn[jj]!=XN_EXPR ) continue;
if( sqlite3ExprCompare(pExpr,aColExpr->a[jj].pExpr,iCursor)==0 ){
return 1;
}
}
}
}
return 0;
................................................................................
nColumn = 1;
}else if( (pIndex = pLoop->u.btree.pIndex)==0 || pIndex->bUnordered ){
return 0;
}else{
nKeyCol = pIndex->nKeyCol;
nColumn = pIndex->nColumn;
assert( nColumn==nKeyCol+1 || !HasRowid(pIndex->pTable) );
assert( pIndex->aiColumn[nColumn-1]==XN_ROWID
|| !HasRowid(pIndex->pTable));
isOrderDistinct = IsUniqueIndex(pIndex);
}
/* Loop through all columns of the index and deal with the ones
** that are not constrained by == or IN.
*/
rev = revSet = 0;
................................................................................
** (revIdx) for the j-th column of the index.
*/
if( pIndex ){
iColumn = pIndex->aiColumn[j];
revIdx = pIndex->aSortOrder[j];
if( iColumn==pIndex->pTable->iPKey ) iColumn = -1;
}else{
iColumn = XN_ROWID;
revIdx = 0;
}
/* An unconstrained column that might be NULL means that this
** WhereLoop is not well-ordered
*/
if( isOrderDistinct
................................................................................
if( pOp->p1!=pLevel->iTabCur ) continue;
if( pOp->opcode==OP_Column ){
int x = pOp->p2;
assert( pIdx->pTable==pTab );
if( !HasRowid(pTab) ){
Index *pPk = sqlite3PrimaryKeyIndex(pTab);
x = pPk->aiColumn[x];
assert( x>=0 );
}
x = sqlite3ColumnOfIndex(pIdx, x);
if( x>=0 ){
pOp->p2 = x;
pOp->p1 = pLevel->iIdxCur;
}
assert( (pLoop->wsFlags & WHERE_IDX_ONLY)==0 || x>=0 );
|
Changes to src/wherecode.c.
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
...
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
|
}
/*
** Return the name of the i-th column of the pIdx index.
*/
static const char *explainIndexColumnName(Index *pIdx, int i){
i = pIdx->aiColumn[i];
if( i==(-2) ) return "<expr>";
if( i==(-1) ) return "rowid";
return pIdx->pTable->aCol[i].zName;
}
/*
** Argument pLevel describes a strategy for scanning table pTab. This
** function appends text to pStr that describes the subset of table
** rows scanned by the strategy in the form of an SQL expression.
................................................................................
pLevel->addrSkip = sqlite3VdbeAddOp4Int(v, (bRev?OP_SeekLT:OP_SeekGT),
iIdxCur, 0, regBase, nSkip);
VdbeCoverageIf(v, bRev==0);
VdbeCoverageIf(v, bRev!=0);
sqlite3VdbeJumpHere(v, j);
for(j=0; j<nSkip; j++){
sqlite3VdbeAddOp3(v, OP_Column, iIdxCur, j, regBase+j);
testcase( pIdx->aiColumn[j]==(-2) );
VdbeComment((v, "%s", explainIndexColumnName(pIdx, j)));
}
}
/* Evaluate the equality constraints
*/
assert( zAff==0 || (int)strlen(zAff)>=nEq );
|
|
|
|
|
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
...
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
|
}
/*
** Return the name of the i-th column of the pIdx index.
*/
static const char *explainIndexColumnName(Index *pIdx, int i){
i = pIdx->aiColumn[i];
if( i==XN_EXPR ) return "<expr>";
if( i==XN_ROWID ) return "rowid";
return pIdx->pTable->aCol[i].zName;
}
/*
** Argument pLevel describes a strategy for scanning table pTab. This
** function appends text to pStr that describes the subset of table
** rows scanned by the strategy in the form of an SQL expression.
................................................................................
pLevel->addrSkip = sqlite3VdbeAddOp4Int(v, (bRev?OP_SeekLT:OP_SeekGT),
iIdxCur, 0, regBase, nSkip);
VdbeCoverageIf(v, bRev==0);
VdbeCoverageIf(v, bRev!=0);
sqlite3VdbeJumpHere(v, j);
for(j=0; j<nSkip; j++){
sqlite3VdbeAddOp3(v, OP_Column, iIdxCur, j, regBase+j);
testcase( pIdx->aiColumn[j]==XN_EXPR );
VdbeComment((v, "%s", explainIndexColumnName(pIdx, j)));
}
}
/* Evaluate the equality constraints
*/
assert( zAff==0 || (int)strlen(zAff)>=nEq );
|