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Simplify the way the column cache is managed around OP_Move instructions.

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FossilOrigin-Name: 320556233e19cdd9d590a09655c3465754700d39
This commit is contained in:
drh
2014-09-12 17:41:30 +00:00
parent fb046e7653
commit 236241aeb0
4 changed files with 11 additions and 18 deletions
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9
src/expr.c
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@@ -2432,16 +2432,9 @@ void sqlite3ExprCacheAffinityChange(Parse *pParse, int iStart, int iCount){
** over to iTo..iTo+nReg-1. Keep the column cache up-to-date.
*/
void sqlite3ExprCodeMove(Parse *pParse, int iFrom, int iTo, int nReg){
int i;
struct yColCache *p;
assert( iFrom>=iTo+nReg || iFrom+nReg<=iTo );
sqlite3VdbeAddOp3(pParse->pVdbe, OP_Move, iFrom, iTo, nReg);
for(i=0, p=pParse->aColCache; i<SQLITE_N_COLCACHE; i++, p++){
int x = p->iReg;
if( x>=iFrom && x<iFrom+nReg ){
p->iReg += iTo-iFrom;
}
}
sqlite3ExprCacheRemove(pParse, iFrom, nReg);
}
#if defined(SQLITE_DEBUG) || defined(SQLITE_COVERAGE_TEST)