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-rw-r--r--src/alter.c14
-rw-r--r--src/build.c14
-rw-r--r--src/expr.c31
-rw-r--r--src/insert.c2
-rw-r--r--src/main.c22
-rw-r--r--src/malloc.c48
-rw-r--r--src/resolve.c23
-rw-r--r--src/select.c34
-rw-r--r--src/sqliteInt.h47
-rw-r--r--src/status.c13
-rw-r--r--src/treeview.c4
-rw-r--r--src/trigger.c2
-rw-r--r--src/update.c6
13 files changed, 183 insertions, 77 deletions
diff --git a/src/alter.c b/src/alter.c
index 0fe41bd2f..3bc779a1e 100644
--- a/src/alter.c
+++ b/src/alter.c
@@ -764,8 +764,8 @@ static int renameUnmapSelectCb(Walker *pWalker, Select *p){
if( ALWAYS(p->pEList) ){
ExprList *pList = p->pEList;
for(i=0; i<pList->nExpr; i++){
- if( pList->a[i].zName ){
- sqlite3RenameTokenRemap(pParse, 0, (void*)pList->a[i].zName);
+ if( pList->a[i].zEName && pList->a[i].eEName==ENAME_NAME ){
+ sqlite3RenameTokenRemap(pParse, 0, (void*)pList->a[i].zEName);
}
}
}
@@ -808,7 +808,9 @@ void sqlite3RenameExprlistUnmap(Parse *pParse, ExprList *pEList){
sWalker.xExprCallback = renameUnmapExprCb;
sqlite3WalkExprList(&sWalker, pEList);
for(i=0; i<pEList->nExpr; i++){
- sqlite3RenameTokenRemap(pParse, 0, (void*)pEList->a[i].zName);
+ if( pEList->a[i].eEName==ENAME_NAME ){
+ sqlite3RenameTokenRemap(pParse, 0, (void*)pEList->a[i].zEName);
+ }
}
}
}
@@ -946,8 +948,10 @@ static void renameColumnElistNames(
if( pEList ){
int i;
for(i=0; i<pEList->nExpr; i++){
- char *zName = pEList->a[i].zName;
- if( 0==sqlite3_stricmp(zName, zOld) ){
+ char *zName = pEList->a[i].zEName;
+ if( pEList->a[i].eEName==ENAME_NAME
+ && 0==sqlite3_stricmp(zName, zOld)
+ ){
renameTokenFind(pParse, pCtx, (void*)zName);
}
}
diff --git a/src/build.c b/src/build.c
index 171cc68cf..196b35acf 100644
--- a/src/build.c
+++ b/src/build.c
@@ -3091,7 +3091,7 @@ void sqlite3CreateForeignKey(
nByte = sizeof(*pFKey) + (nCol-1)*sizeof(pFKey->aCol[0]) + pTo->n + 1;
if( pToCol ){
for(i=0; i<pToCol->nExpr; i++){
- nByte += sqlite3Strlen30(pToCol->a[i].zName) + 1;
+ nByte += sqlite3Strlen30(pToCol->a[i].zEName) + 1;
}
}
pFKey = sqlite3DbMallocZero(db, nByte );
@@ -3116,7 +3116,7 @@ void sqlite3CreateForeignKey(
for(i=0; i<nCol; i++){
int j;
for(j=0; j<p->nCol; j++){
- if( sqlite3StrICmp(p->aCol[j].zName, pFromCol->a[i].zName)==0 ){
+ if( sqlite3StrICmp(p->aCol[j].zName, pFromCol->a[i].zEName)==0 ){
pFKey->aCol[i].iFrom = j;
break;
}
@@ -3124,22 +3124,22 @@ void sqlite3CreateForeignKey(
if( j>=p->nCol ){
sqlite3ErrorMsg(pParse,
"unknown column \"%s\" in foreign key definition",
- pFromCol->a[i].zName);
+ pFromCol->a[i].zEName);
goto fk_end;
}
if( IN_RENAME_OBJECT ){
- sqlite3RenameTokenRemap(pParse, &pFKey->aCol[i], pFromCol->a[i].zName);
+ sqlite3RenameTokenRemap(pParse, &pFKey->aCol[i], pFromCol->a[i].zEName);
}
}
}
if( pToCol ){
for(i=0; i<nCol; i++){
- int n = sqlite3Strlen30(pToCol->a[i].zName);
+ int n = sqlite3Strlen30(pToCol->a[i].zEName);
pFKey->aCol[i].zCol = z;
if( IN_RENAME_OBJECT ){
- sqlite3RenameTokenRemap(pParse, z, pToCol->a[i].zName);
+ sqlite3RenameTokenRemap(pParse, z, pToCol->a[i].zEName);
}
- memcpy(z, pToCol->a[i].zName, n);
+ memcpy(z, pToCol->a[i].zEName, n);
z[n] = 0;
z += n+1;
}
diff --git a/src/expr.c b/src/expr.c
index 3b2b513b6..150e34a2c 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -1436,12 +1436,11 @@ ExprList *sqlite3ExprListDup(sqlite3 *db, ExprList *p, int flags){
pNewExpr->pLeft = pPriorSelectCol;
}
}
- pItem->zName = sqlite3DbStrDup(db, pOldItem->zName);
- pItem->zSpan = sqlite3DbStrDup(db, pOldItem->zSpan);
+ pItem->zEName = sqlite3DbStrDup(db, pOldItem->zEName);
pItem->sortFlags = pOldItem->sortFlags;
+ pItem->eEName = pOldItem->eEName;
pItem->done = 0;
pItem->bNulls = pOldItem->bNulls;
- pItem->bSpanIsTab = pOldItem->bSpanIsTab;
pItem->bSorterRef = pOldItem->bSorterRef;
pItem->u = pOldItem->u;
}
@@ -1608,9 +1607,9 @@ ExprList *sqlite3ExprListAppend(
pList = pNew;
}
pItem = &pList->a[pList->nExpr++];
- assert( offsetof(struct ExprList_item,zName)==sizeof(pItem->pExpr) );
+ assert( offsetof(struct ExprList_item,zEName)==sizeof(pItem->pExpr) );
assert( offsetof(struct ExprList_item,pExpr)==0 );
- memset(&pItem->zName,0,sizeof(*pItem)-offsetof(struct ExprList_item,zName));
+ memset(&pItem->zEName,0,sizeof(*pItem)-offsetof(struct ExprList_item,zEName));
pItem->pExpr = pExpr;
return pList;
@@ -1667,7 +1666,7 @@ ExprList *sqlite3ExprListAppendVector(
pList = sqlite3ExprListAppend(pParse, pList, pSubExpr);
if( pList ){
assert( pList->nExpr==iFirst+i+1 );
- pList->a[pList->nExpr-1].zName = pColumns->a[i].zName;
+ pList->a[pList->nExpr-1].zEName = pColumns->a[i].zName;
pColumns->a[i].zName = 0;
}
}
@@ -1727,7 +1726,7 @@ void sqlite3ExprListSetSortOrder(ExprList *p, int iSortOrder, int eNulls){
}
/*
-** Set the ExprList.a[].zName element of the most recently added item
+** Set the ExprList.a[].zEName element of the most recently added item
** on the expression list.
**
** pList might be NULL following an OOM error. But pName should never be
@@ -1745,11 +1744,12 @@ void sqlite3ExprListSetName(
struct ExprList_item *pItem;
assert( pList->nExpr>0 );
pItem = &pList->a[pList->nExpr-1];
- assert( pItem->zName==0 );
- pItem->zName = sqlite3DbStrNDup(pParse->db, pName->z, pName->n);
- if( dequote ) sqlite3Dequote(pItem->zName);
+ assert( pItem->zEName==0 );
+ assert( pItem->eEName==ENAME_NAME );
+ pItem->zEName = sqlite3DbStrNDup(pParse->db, pName->z, pName->n);
+ if( dequote ) sqlite3Dequote(pItem->zEName);
if( IN_RENAME_OBJECT ){
- sqlite3RenameTokenMap(pParse, (void*)pItem->zName, pName);
+ sqlite3RenameTokenMap(pParse, (void*)pItem->zEName, pName);
}
}
}
@@ -1773,8 +1773,10 @@ void sqlite3ExprListSetSpan(
if( pList ){
struct ExprList_item *pItem = &pList->a[pList->nExpr-1];
assert( pList->nExpr>0 );
- sqlite3DbFree(db, pItem->zSpan);
- pItem->zSpan = sqlite3DbSpanDup(db, zStart, zEnd);
+ if( pItem->zEName==0 ){
+ pItem->zEName = sqlite3DbSpanDup(db, zStart, zEnd);
+ pItem->eEName = ENAME_SPAN;
+ }
}
}
@@ -1804,8 +1806,7 @@ static SQLITE_NOINLINE void exprListDeleteNN(sqlite3 *db, ExprList *pList){
assert( pList->nExpr>0 );
do{
sqlite3ExprDelete(db, pItem->pExpr);
- sqlite3DbFree(db, pItem->zName);
- sqlite3DbFree(db, pItem->zSpan);
+ sqlite3DbFree(db, pItem->zEName);
pItem++;
}while( --i>0 );
sqlite3DbFreeNN(db, pList);
diff --git a/src/insert.c b/src/insert.c
index 5915f4fa9..75db13177 100644
--- a/src/insert.c
+++ b/src/insert.c
@@ -1635,7 +1635,7 @@ void sqlite3GenerateConstraintChecks(
if( onError==OE_Ignore ){
sqlite3VdbeGoto(v, ignoreDest);
}else{
- char *zName = pCheck->a[i].zName;
+ char *zName = pCheck->a[i].zEName;
if( zName==0 ) zName = pTab->zName;
if( onError==OE_Replace ) onError = OE_Abort; /* IMP: R-26383-51744 */
sqlite3HaltConstraint(pParse, SQLITE_CONSTRAINT_CHECK,
diff --git a/src/main.c b/src/main.c
index 1afeee0bd..5b70273af 100644
--- a/src/main.c
+++ b/src/main.c
@@ -683,6 +683,7 @@ int sqlite3_config(int op, ...){
static int setupLookaside(sqlite3 *db, void *pBuf, int sz, int cnt){
#ifndef SQLITE_OMIT_LOOKASIDE
void *pStart;
+ sqlite3_int64 szAlloc = sz*(sqlite3_int64)cnt;
if( sqlite3LookasideUsed(db,0)>0 ){
return SQLITE_BUSY;
@@ -705,7 +706,7 @@ static int setupLookaside(sqlite3 *db, void *pBuf, int sz, int cnt){
pStart = 0;
}else if( pBuf==0 ){
sqlite3BeginBenignMalloc();
- pStart = sqlite3Malloc( sz*(sqlite3_int64)cnt ); /* IMP: R-61949-35727 */
+ pStart = sqlite3Malloc( szAlloc ); /* IMP: R-61949-35727 */
sqlite3EndBenignMalloc();
if( pStart ) cnt = sqlite3MallocSize(pStart)/sz;
}else{
@@ -714,6 +715,15 @@ static int setupLookaside(sqlite3 *db, void *pBuf, int sz, int cnt){
db->lookaside.pStart = pStart;
db->lookaside.pInit = 0;
db->lookaside.pFree = 0;
+#ifndef SQLITE_OMIT_MINI_LOOKASIDE
+ db->lookaside.pMiniInit = 0;
+ db->lookaside.pMiniFree = 0;
+ /* The arithmetic below causes the number of large lookaside slots to be 1/3
+ ** the number of mini slots, based on the observation that 75% of allocations
+ ** are <= MINI_SZ bytes.
+ */
+ cnt = szAlloc/(3*MINI_SZ+sz);
+#endif
db->lookaside.sz = (u16)sz;
db->lookaside.szTrue = (u16)sz;
if( pStart ){
@@ -727,6 +737,16 @@ static int setupLookaside(sqlite3 *db, void *pBuf, int sz, int cnt){
db->lookaside.pInit = p;
p = (LookasideSlot*)&((u8*)p)[sz];
}
+#ifndef SQLITE_OMIT_MINI_LOOKASIDE
+ db->lookaside.pMiddle = p;
+ /* Fill the remainder of the buffer with mini slots */
+ while(p<=(LookasideSlot*)&((u8*)pStart)[szAlloc-MINI_SZ]){
+ p->pNext = db->lookaside.pMiniInit;
+ db->lookaside.pMiniInit = p;
+ db->lookaside.nSlot++;
+ p = (LookasideSlot*)&((u8*)p)[MINI_SZ];
+ }
+#endif
db->lookaside.pEnd = p;
db->lookaside.bDisable = 0;
db->lookaside.bMalloced = pBuf==0 ?1:0;
diff --git a/src/malloc.c b/src/malloc.c
index 131ed6039..26a258b34 100644
--- a/src/malloc.c
+++ b/src/malloc.c
@@ -332,6 +332,13 @@ int sqlite3MallocSize(void *p){
assert( sqlite3MemdebugHasType(p, MEMTYPE_HEAP) );
return sqlite3GlobalConfig.m.xSize(p);
}
+static int lookasideMallocSize(sqlite3 *db, void *p){
+#ifndef SQLITE_OMIT_MINI_LOOKASIDE
+ return p<db->lookaside.pMiddle ? db->lookaside.szTrue : MINI_SZ;
+#else
+ return db->lookaside.szTrue;
+#endif
+}
int sqlite3DbMallocSize(sqlite3 *db, void *p){
assert( p!=0 );
if( db==0 || !isLookaside(db,p) ){
@@ -347,7 +354,7 @@ int sqlite3DbMallocSize(sqlite3 *db, void *p){
return sqlite3GlobalConfig.m.xSize(p);
}else{
assert( sqlite3_mutex_held(db->mutex) );
- return db->lookaside.szTrue;
+ return lookasideMallocSize(db, p);
}
}
sqlite3_uint64 sqlite3_msize(void *p){
@@ -397,6 +404,17 @@ void sqlite3DbFreeNN(sqlite3 *db, void *p){
}
if( isLookaside(db, p) ){
LookasideSlot *pBuf = (LookasideSlot*)p;
+#ifndef SQLITE_OMIT_MINI_LOOKASIDE
+ if( p>=db->lookaside.pMiddle ){
+# ifdef SQLITE_DEBUG
+ /* Trash all content in the buffer being freed */
+ memset(p, 0xaa, MINI_SZ);
+# endif
+ pBuf->pNext = db->lookaside.pMiniFree;
+ db->lookaside.pMiniFree = pBuf;
+ return;
+ }
+#endif
#ifdef SQLITE_DEBUG
/* Trash all content in the buffer being freed */
memset(p, 0xaa, db->lookaside.szTrue);
@@ -560,11 +578,27 @@ void *sqlite3DbMallocRawNN(sqlite3 *db, u64 n){
assert( sqlite3_mutex_held(db->mutex) );
assert( db->pnBytesFreed==0 );
if( n>db->lookaside.sz ){
- if( db->lookaside.bDisable ){
- return db->mallocFailed ? 0 : dbMallocRawFinish(db, n);
+ if( !db->lookaside.bDisable ){
+ db->lookaside.anStat[1]++;
+ }else if( db->mallocFailed ){
+ return 0;
}
- db->lookaside.anStat[1]++;
- }else if( (pBuf = db->lookaside.pFree)!=0 ){
+ return dbMallocRawFinish(db, n);
+ }
+# ifndef SQLITE_OMIT_MINI_LOOKASIDE
+ if( n<=MINI_SZ ){
+ if( (pBuf = db->lookaside.pMiniFree)!=0 ){
+ db->lookaside.pMiniFree = pBuf->pNext;
+ db->lookaside.anStat[0]++;
+ return (void*)pBuf;
+ }else if( (pBuf = db->lookaside.pMiniInit)!=0 ){
+ db->lookaside.pMiniInit = pBuf->pNext;
+ db->lookaside.anStat[0]++;
+ return (void*)pBuf;
+ }
+ }
+# endif
+ if( (pBuf = db->lookaside.pFree)!=0 ){
db->lookaside.pFree = pBuf->pNext;
db->lookaside.anStat[0]++;
return (void*)pBuf;
@@ -597,7 +631,7 @@ void *sqlite3DbRealloc(sqlite3 *db, void *p, u64 n){
assert( db!=0 );
if( p==0 ) return sqlite3DbMallocRawNN(db, n);
assert( sqlite3_mutex_held(db->mutex) );
- if( isLookaside(db,p) && n<=db->lookaside.szTrue ) return p;
+ if( isLookaside(db,p) && n<lookasideMallocSize(db, p) ) return p;
return dbReallocFinish(db, p, n);
}
static SQLITE_NOINLINE void *dbReallocFinish(sqlite3 *db, void *p, u64 n){
@@ -608,7 +642,7 @@ static SQLITE_NOINLINE void *dbReallocFinish(sqlite3 *db, void *p, u64 n){
if( isLookaside(db, p) ){
pNew = sqlite3DbMallocRawNN(db, n);
if( pNew ){
- memcpy(pNew, p, db->lookaside.szTrue);
+ memcpy(pNew, p, lookasideMallocSize(db, p));
sqlite3DbFree(db, p);
}
}else{
diff --git a/src/resolve.c b/src/resolve.c
index ea8f00244..92a937d45 100644
--- a/src/resolve.c
+++ b/src/resolve.c
@@ -132,13 +132,16 @@ static int nameInUsingClause(IdList *pUsing, const char *zCol){
** and zCol. If any of zDb, zTab, and zCol are NULL then those fields will
** match anything.
*/
-int sqlite3MatchSpanName(
- const char *zSpan,
+int sqlite3MatchEName(
+ const struct ExprList_item *pItem,
const char *zCol,
const char *zTab,
const char *zDb
){
int n;
+ const char *zSpan;
+ if( pItem->eEName!=ENAME_TAB ) return 0;
+ zSpan = pItem->zEName;
for(n=0; ALWAYS(zSpan[n]) && zSpan[n]!='.'; n++){}
if( zDb && (sqlite3StrNICmp(zSpan, zDb, n)!=0 || zDb[n]!=0) ){
return 0;
@@ -267,7 +270,7 @@ static int lookupName(
int hit = 0;
pEList = pItem->pSelect->pEList;
for(j=0; j<pEList->nExpr; j++){
- if( sqlite3MatchSpanName(pEList->a[j].zSpan, zCol, zTab, zDb) ){
+ if( sqlite3MatchEName(&pEList->a[j], zCol, zTab, zDb) ){
cnt++;
cntTab = 2;
pMatch = pItem;
@@ -448,8 +451,11 @@ static int lookupName(
pEList = pNC->uNC.pEList;
assert( pEList!=0 );
for(j=0; j<pEList->nExpr; j++){
- char *zAs = pEList->a[j].zName;
- if( zAs!=0 && sqlite3StrICmp(zAs, zCol)==0 ){
+ char *zAs;
+ if( pEList->a[j].eEName==ENAME_NAME
+ && (zAs = pEList->a[j].zEName)!=0
+ && sqlite3StrICmp(zAs, zCol)==0
+ ){
Expr *pOrig;
assert( pExpr->pLeft==0 && pExpr->pRight==0 );
assert( pExpr->x.pList==0 );
@@ -1115,8 +1121,11 @@ static int resolveAsName(
if( pE->op==TK_ID ){
char *zCol = pE->u.zToken;
for(i=0; i<pEList->nExpr; i++){
- char *zAs = pEList->a[i].zName;
- if( zAs!=0 && sqlite3StrICmp(zAs, zCol)==0 ){
+ char *zAs = pEList->a[i].zEName;
+ if( pEList->a[i].eEName==ENAME_NAME
+ && (zAs = pEList->a[i].zEName)!=0
+ && sqlite3StrICmp(zAs, zCol)==0
+ ){
return i+1;
}
}
diff --git a/src/select.c b/src/select.c
index 26c72d6da..11c25e787 100644
--- a/src/select.c
+++ b/src/select.c
@@ -918,7 +918,7 @@ static void selectInnerLoop(
if( srcTab>=0 ){
for(i=0; i<nResultCol; i++){
sqlite3VdbeAddOp3(v, OP_Column, srcTab, i, regResult+i);
- VdbeComment((v, "%s", p->pEList->a[i].zName));
+ VdbeComment((v, "%s", p->pEList->a[i].zEName));
}
}else if( eDest!=SRT_Exists ){
#ifdef SQLITE_ENABLE_SORTER_REFERENCES
@@ -1539,7 +1539,7 @@ static void generateSortTail(
iRead = iCol--;
}
sqlite3VdbeAddOp3(v, OP_Column, iSortTab, iRead, regRow+i);
- VdbeComment((v, "%s", aOutEx[i].zName?aOutEx[i].zName : aOutEx[i].zSpan));
+ VdbeComment((v, "%s", aOutEx[i].zEName));
}
}
switch( eDest ){
@@ -1873,9 +1873,9 @@ static void generateColumnNames(
assert( p!=0 );
assert( p->op!=TK_AGG_COLUMN ); /* Agg processing has not run yet */
assert( p->op!=TK_COLUMN || p->y.pTab!=0 ); /* Covering idx not yet coded */
- if( pEList->a[i].zName ){
+ if( pEList->a[i].zEName && pEList->a[i].eEName==ENAME_NAME ){
/* An AS clause always takes first priority */
- char *zName = pEList->a[i].zName;
+ char *zName = pEList->a[i].zEName;
sqlite3VdbeSetColName(v, i, COLNAME_NAME, zName, SQLITE_TRANSIENT);
}else if( srcName && p->op==TK_COLUMN ){
char *zCol;
@@ -1897,7 +1897,7 @@ static void generateColumnNames(
sqlite3VdbeSetColName(v, i, COLNAME_NAME, zCol, SQLITE_TRANSIENT);
}
}else{
- const char *z = pEList->a[i].zSpan;
+ const char *z = pEList->a[i].zEName;
z = z==0 ? sqlite3MPrintf(db, "column%d", i+1) : sqlite3DbStrDup(db, z);
sqlite3VdbeSetColName(v, i, COLNAME_NAME, z, SQLITE_DYNAMIC);
}
@@ -1959,7 +1959,7 @@ int sqlite3ColumnsFromExprList(
for(i=0, pCol=aCol; i<nCol && !db->mallocFailed; i++, pCol++){
/* Get an appropriate name for the column
*/
- if( (zName = pEList->a[i].zName)!=0 ){
+ if( (zName = pEList->a[i].zEName)!=0 && pEList->a[i].eEName==ENAME_NAME ){
/* If the column contains an "AS <name>" phrase, use <name> as the name */
}else{
Expr *pColExpr = sqlite3ExprSkipCollateAndLikely(pEList->a[i].pExpr);
@@ -1979,7 +1979,7 @@ int sqlite3ColumnsFromExprList(
zName = pColExpr->u.zToken;
}else{
/* Use the original text of the column expression as its name */
- zName = pEList->a[i].zSpan;
+ zName = pEList->a[i].zEName;
}
}
if( zName ){
@@ -5003,10 +5003,9 @@ static int selectExpander(Walker *pWalker, Select *p){
*/
pNew = sqlite3ExprListAppend(pParse, pNew, a[k].pExpr);
if( pNew ){
- pNew->a[pNew->nExpr-1].zName = a[k].zName;
- pNew->a[pNew->nExpr-1].zSpan = a[k].zSpan;
- a[k].zName = 0;
- a[k].zSpan = 0;
+ pNew->a[pNew->nExpr-1].zEName = a[k].zEName;
+ pNew->a[pNew->nExpr-1].eEName = a[k].eEName;
+ a[k].zEName = 0;
}
a[k].pExpr = 0;
}else{
@@ -5045,7 +5044,7 @@ static int selectExpander(Walker *pWalker, Select *p){
assert( zName );
if( zTName && pSub
- && sqlite3MatchSpanName(pSub->pEList->a[j].zSpan, 0, zTName, 0)==0
+ && sqlite3MatchEName(&pSub->pEList->a[j], 0, zTName, 0)==0
){
continue;
}
@@ -5098,15 +5097,16 @@ static int selectExpander(Walker *pWalker, Select *p){
sqlite3ExprListSetName(pParse, pNew, &sColname, 0);
if( pNew && (p->selFlags & SF_NestedFrom)!=0 ){
struct ExprList_item *pX = &pNew->a[pNew->nExpr-1];
+ sqlite3DbFree(db, pX->zEName);
if( pSub ){
- pX->zSpan = sqlite3DbStrDup(db, pSub->pEList->a[j].zSpan);
- testcase( pX->zSpan==0 );
+ pX->zEName = sqlite3DbStrDup(db, pSub->pEList->a[j].zEName);
+ testcase( pX->zEName==0 );
}else{
- pX->zSpan = sqlite3MPrintf(db, "%s.%s.%s",
+ pX->zEName = sqlite3MPrintf(db, "%s.%s.%s",
zSchemaName, zTabName, zColname);
- testcase( pX->zSpan==0 );
+ testcase( pX->zEName==0 );
}
- pX->bSpanIsTab = 1;
+ pX->eEName = ENAME_TAB;
}
sqlite3DbFree(db, zToFree);
}
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index 4b4a9068c..da9a7ff81 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -1287,6 +1287,11 @@ struct Lookaside {
u32 anStat[3]; /* 0: hits. 1: size misses. 2: full misses */
LookasideSlot *pInit; /* List of buffers not previously used */
LookasideSlot *pFree; /* List of available buffers */
+#ifndef SQLITE_OMIT_MINI_LOOKASIDE
+ LookasideSlot *pMiniInit; /* List of mini buffers not prediously used */
+ LookasideSlot *pMiniFree; /* List of available mini buffers */
+ void *pMiddle; /* An address between the fullsize and mini buffers */
+#endif
void *pStart; /* First byte of available memory space */
void *pEnd; /* First byte past end of available space */
};
@@ -1298,6 +1303,9 @@ struct LookasideSlot {
#define EnableLookaside db->lookaside.bDisable--;\
db->lookaside.sz=db->lookaside.bDisable?0:db->lookaside.szTrue
+/* Size of the MINI lookside allocation */
+#define MINI_SZ 128
+
/*
** A hash table for built-in function definitions. (Application-defined
** functions use a regular table table from hash.h.)
@@ -2636,23 +2644,28 @@ struct Expr {
** also be used as the argument to a function, in which case the a.zName
** field is not used.
**
-** By default the Expr.zSpan field holds a human-readable description of
-** the expression that is used in the generation of error messages and
-** column labels. In this case, Expr.zSpan is typically the text of a
-** column expression as it exists in a SELECT statement. However, if
-** the bSpanIsTab flag is set, then zSpan is overloaded to mean the name
-** of the result column in the form: DATABASE.TABLE.COLUMN. This later
-** form is used for name resolution with nested FROM clauses.
+** In order to try to keep memory usage down, the Expr.a.zEName field
+** is used for multiple purposes:
+**
+** eEName Usage
+** ---------- -------------------------
+** ENAME_NAME (1) the AS of result set column
+** (2) COLUMN= of an UPDATE
+**
+** ENAME_TAB DB.TABLE.NAME used to resolve names
+** of subqueries
+**
+** ENAME_SPAN Text of the original result set
+** expression.
*/
struct ExprList {
int nExpr; /* Number of expressions on the list */
struct ExprList_item { /* For each expression in the list */
Expr *pExpr; /* The parse tree for this expression */
- char *zName; /* Token associated with this expression */
- char *zSpan; /* Original text of the expression */
+ char *zEName; /* Token associated with this expression */
u8 sortFlags; /* Mask of KEYINFO_ORDER_* flags */
+ unsigned eEName :2; /* Meaning of zEName */
unsigned done :1; /* A flag to indicate when processing is finished */
- unsigned bSpanIsTab :1; /* zSpan holds DB.TABLE.COLUMN */
unsigned reusable :1; /* Constant expression is reusable */
unsigned bSorterRef :1; /* Defer evaluation until after sorting */
unsigned bNulls: 1; /* True if explicit "NULLS FIRST/LAST" */
@@ -2667,6 +2680,13 @@ struct ExprList {
};
/*
+** Allowed values for Expr.a.eEName
+*/
+#define ENAME_NAME 0 /* The AS clause of a result set */
+#define ENAME_SPAN 1 /* Complete text of the result set expression */
+#define ENAME_TAB 2 /* "DB.TABLE.NAME" for the result set */
+
+/*
** An instance of this structure can hold a simple list of identifiers,
** such as the list "a,b,c" in the following statements:
**
@@ -4404,7 +4424,12 @@ void sqlite3CodeRhsOfIN(Parse*, Expr*, int);
int sqlite3CodeSubselect(Parse*, Expr*);
void sqlite3SelectPrep(Parse*, Select*, NameContext*);
void sqlite3SelectWrongNumTermsError(Parse *pParse, Select *p);
-int sqlite3MatchSpanName(const char*, const char*, const char*, const char*);
+int sqlite3MatchEName(
+ const struct ExprList_item*,
+ const char*,
+ const char*,
+ const char*
+);
int sqlite3ResolveExprNames(NameContext*, Expr*);
int sqlite3ResolveExprListNames(NameContext*, ExprList*);
void sqlite3ResolveSelectNames(Parse*, Select*, NameContext*);
diff --git a/src/status.c b/src/status.c
index a5a39f4c1..d7ffe99ed 100644
--- a/src/status.c
+++ b/src/status.c
@@ -188,6 +188,10 @@ static u32 countLookasideSlots(LookasideSlot *p){
int sqlite3LookasideUsed(sqlite3 *db, int *pHighwater){
u32 nInit = countLookasideSlots(db->lookaside.pInit);
u32 nFree = countLookasideSlots(db->lookaside.pFree);
+#ifndef SQLITE_OMIT_MINI_LOOKASIDE
+ nInit += countLookasideSlots(db->lookaside.pMiniInit);
+ nFree += countLookasideSlots(db->lookaside.pMiniFree);
+#endif
if( pHighwater ) *pHighwater = db->lookaside.nSlot - nInit;
return db->lookaside.nSlot - (nInit+nFree);
}
@@ -220,6 +224,15 @@ int sqlite3_db_status(
db->lookaside.pInit = db->lookaside.pFree;
db->lookaside.pFree = 0;
}
+#ifndef SQLITE_OMIT_MINI_LOOKASIDE
+ p = db->lookaside.pMiniFree;
+ if( p ){
+ while( p->pNext ) p = p->pNext;
+ p->pNext = db->lookaside.pMiniInit;
+ db->lookaside.pMiniInit = db->lookaside.pMiniFree;
+ db->lookaside.pMiniFree = 0;
+ }
+#endif
}
break;
}
diff --git a/src/treeview.c b/src/treeview.c
index 5b9e06454..ac0e92a08 100644
--- a/src/treeview.c
+++ b/src/treeview.c
@@ -106,7 +106,7 @@ void sqlite3TreeViewWith(TreeView *pView, const With *pWith, u8 moreToFollow){
char cSep = '(';
int j;
for(j=0; j<pCte->pCols->nExpr; j++){
- sqlite3_str_appendf(&x, "%c%s", cSep, pCte->pCols->a[j].zName);
+ sqlite3_str_appendf(&x, "%c%s", cSep, pCte->pCols->a[j].zEName);
cSep = ',';
}
sqlite3_str_appendf(&x, ")");
@@ -727,7 +727,7 @@ void sqlite3TreeViewBareExprList(
sqlite3TreeViewLine(pView, "%s", zLabel);
for(i=0; i<pList->nExpr; i++){
int j = pList->a[i].u.x.iOrderByCol;
- char *zName = pList->a[i].zName;
+ char *zName = pList->a[i].zEName;
int moreToFollow = i<pList->nExpr - 1;
if( j || zName ){
sqlite3TreeViewPush(pView, moreToFollow);
diff --git a/src/trigger.c b/src/trigger.c
index 5586995e3..458aa2996 100644
--- a/src/trigger.c
+++ b/src/trigger.c
@@ -688,7 +688,7 @@ static int checkColumnOverlap(IdList *pIdList, ExprList *pEList){
int e;
if( pIdList==0 || NEVER(pEList==0) ) return 1;
for(e=0; e<pEList->nExpr; e++){
- if( sqlite3IdListIndex(pIdList, pEList->a[e].zName)>=0 ) return 1;
+ if( sqlite3IdListIndex(pIdList, pEList->a[e].zEName)>=0 ) return 1;
}
return 0;
}
diff --git a/src/update.c b/src/update.c
index 935e1d937..f4e8f696d 100644
--- a/src/update.c
+++ b/src/update.c
@@ -305,7 +305,7 @@ void sqlite3Update(
goto update_cleanup;
}
for(j=0; j<pTab->nCol; j++){
- if( sqlite3StrICmp(pTab->aCol[j].zName, pChanges->a[i].zName)==0 ){
+ if( sqlite3StrICmp(pTab->aCol[j].zName, pChanges->a[i].zEName)==0 ){
if( j==pTab->iPKey ){
chngRowid = 1;
pRowidExpr = pChanges->a[i].pExpr;
@@ -327,12 +327,12 @@ void sqlite3Update(
}
}
if( j>=pTab->nCol ){
- if( pPk==0 && sqlite3IsRowid(pChanges->a[i].zName) ){
+ if( pPk==0 && sqlite3IsRowid(pChanges->a[i].zEName) ){
j = -1;
chngRowid = 1;
pRowidExpr = pChanges->a[i].pExpr;
}else{
- sqlite3ErrorMsg(pParse, "no such column: %s", pChanges->a[i].zName);
+ sqlite3ErrorMsg(pParse, "no such column: %s", pChanges->a[i].zEName);
pParse->checkSchema = 1;
goto update_cleanup;
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-21 20:04:45 +0000