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Changes to reduce the heap space consumed by triggers, views and tables in the in-memory representation of the schema. Also to reduce the space used by prepared statements slightly. (CVS 6305)

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FossilOrigin-Name: d9f6ffbc5ea090ba0daac571fc9a6c68b9c864e4
This commit is contained in:
danielk1977
2009-02-19 14:39:25 +00:00
parent 076d4661a6
commit 6ab3a2ec8a
27 changed files with 664 additions and 366 deletions
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27
src/trigger.c
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@@ -10,7 +10,7 @@
*************************************************************************
**
**
** $Id: trigger.c,v 1.133 2008/12/26 07:56:39 danielk1977 Exp $
** $Id: trigger.c,v 1.134 2009/02/19 14:39:25 danielk1977 Exp $
*/
#include "sqliteInt.h"
@@ -182,7 +182,7 @@ void sqlite3BeginTrigger(
pTrigger->pTabSchema = pTab->pSchema;
pTrigger->op = (u8)op;
pTrigger->tr_tm = tr_tm==TK_BEFORE ? TRIGGER_BEFORE : TRIGGER_AFTER;
pTrigger->pWhen = sqlite3ExprDup(db, pWhen);
pTrigger->pWhen = sqlite3ExprDup(db, pWhen, EXPRDUP_REDUCE);
pTrigger->pColumns = sqlite3IdListDup(db, pColumns);
sqlite3TokenCopy(db, &pTrigger->nameToken,pName);
assert( pParse->pNewTrigger==0 );
@@ -292,17 +292,17 @@ static void sqlitePersistTriggerStep(sqlite3 *db, TriggerStep *p){
p->target.dyn = 1;
}
if( p->pSelect ){
Select *pNew = sqlite3SelectDup(db, p->pSelect);
Select *pNew = sqlite3SelectDup(db, p->pSelect, 1);
sqlite3SelectDelete(db, p->pSelect);
p->pSelect = pNew;
}
if( p->pWhere ){
Expr *pNew = sqlite3ExprDup(db, p->pWhere);
Expr *pNew = sqlite3ExprDup(db, p->pWhere, EXPRDUP_REDUCE);
sqlite3ExprDelete(db, p->pWhere);
p->pWhere = pNew;
}
if( p->pExprList ){
ExprList *pNew = sqlite3ExprListDup(db, p->pExprList);
ExprList *pNew = sqlite3ExprListDup(db, p->pExprList, 1);
sqlite3ExprListDelete(db, p->pExprList);
p->pExprList = pNew;
}
@@ -546,6 +546,9 @@ void sqlite3DropTriggerPtr(Parse *pParse, Trigger *pTrigger){
sqlite3ChangeCookie(pParse, iDb);
sqlite3VdbeAddOp2(v, OP_Close, 0, 0);
sqlite3VdbeAddOp4(v, OP_DropTrigger, iDb, 0, 0, pTrigger->name, 0);
if( pParse->nMem<3 ){
pParse->nMem = 3;
}
}
}
@@ -677,7 +680,7 @@ static int codeTriggerProgram(
pParse->trigStack->orconf = orconf;
switch( pTriggerStep->op ){
case TK_SELECT: {
Select *ss = sqlite3SelectDup(db, pTriggerStep->pSelect);
Select *ss = sqlite3SelectDup(db, pTriggerStep->pSelect, 0);
if( ss ){
SelectDest dest;
@@ -692,8 +695,8 @@ static int codeTriggerProgram(
pSrc = targetSrcList(pParse, pTriggerStep);
sqlite3VdbeAddOp2(v, OP_ResetCount, 0, 0);
sqlite3Update(pParse, pSrc,
sqlite3ExprListDup(db, pTriggerStep->pExprList),
sqlite3ExprDup(db, pTriggerStep->pWhere), orconf);
sqlite3ExprListDup(db, pTriggerStep->pExprList, 0),
sqlite3ExprDup(db, pTriggerStep->pWhere, 0), orconf);
sqlite3VdbeAddOp2(v, OP_ResetCount, 1, 0);
break;
}
@@ -702,8 +705,8 @@ static int codeTriggerProgram(
pSrc = targetSrcList(pParse, pTriggerStep);
sqlite3VdbeAddOp2(v, OP_ResetCount, 0, 0);
sqlite3Insert(pParse, pSrc,
sqlite3ExprListDup(db, pTriggerStep->pExprList),
sqlite3SelectDup(db, pTriggerStep->pSelect),
sqlite3ExprListDup(db, pTriggerStep->pExprList, 0),
sqlite3SelectDup(db, pTriggerStep->pSelect, 0),
sqlite3IdListDup(db, pTriggerStep->pIdList), orconf);
sqlite3VdbeAddOp2(v, OP_ResetCount, 1, 0);
break;
@@ -713,7 +716,7 @@ static int codeTriggerProgram(
sqlite3VdbeAddOp2(v, OP_ResetCount, 0, 0);
pSrc = targetSrcList(pParse, pTriggerStep);
sqlite3DeleteFrom(pParse, pSrc,
sqlite3ExprDup(db, pTriggerStep->pWhere));
sqlite3ExprDup(db, pTriggerStep->pWhere, 0));
sqlite3VdbeAddOp2(v, OP_ResetCount, 1, 0);
break;
}
@@ -830,7 +833,7 @@ int sqlite3CodeRowTrigger(
/* code the WHEN clause */
endTrigger = sqlite3VdbeMakeLabel(pParse->pVdbe);
whenExpr = sqlite3ExprDup(db, p->pWhen);
whenExpr = sqlite3ExprDup(db, p->pWhen, 0);
if( db->mallocFailed || sqlite3ResolveExprNames(&sNC, whenExpr) ){
pParse->trigStack = trigStackEntry.pNext;
sqlite3ExprDelete(db, whenExpr);