database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-11-15 11:41:13 +03:00
Code Activity

Suppress more instances of unnecessary OP_IsNull and OP_Affinity opcodes.

Browse Source 
FossilOrigin-Name: bf6c0bd1c5568c6292ea0a64c8a5071e1bd3079a
This commit is contained in:
drh
2009-11-18 01:25:26 +00:00
parent 3c65721a5b
commit 2f2855b638
5 changed files with 38 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/where.c
View File

@@ -2789,9 +2789,7 @@ static int codeAllEqualityTerms(
testcase( pTerm->eOperator & WO_IN );
if( (pTerm->eOperator & (WO_ISNULL|WO_IN))==0 ){
Expr *pRight = pTerm->pExpr->pRight;
if( sqlite3ExprCanBeNull(pRight) ){
sqlite3VdbeAddOp2(v, OP_IsNull, regBase+j, pLevel->addrBrk);
}
sqlite3ExprCodeIsNullJump(v, pRight, regBase+j, pLevel->addrBrk);
if( zAff ){
if( sqlite3CompareAffinity(pRight, zAff[j])==SQLITE_AFF_NONE ){
zAff[j] = SQLITE_AFF_NONE;
@@ -3124,7 +3122,7 @@ static Bitmask codeOneLoopStart(
if( pRangeStart ){
Expr *pRight = pRangeStart->pExpr->pRight;
sqlite3ExprCode(pParse, pRight, regBase+nEq);
sqlite3VdbeAddOp2(v, OP_IsNull, regBase+nEq, addrNxt);
sqlite3ExprCodeIsNullJump(v, pRight, regBase+nEq, addrNxt);
if( zAff ){
if( sqlite3CompareAffinity(pRight, zAff[nConstraint])==SQLITE_AFF_NONE){
/* Since the comparison is to be performed with no conversions
@@ -3162,7 +3160,7 @@ static Bitmask codeOneLoopStart(
Expr *pRight = pRangeEnd->pExpr->pRight;
sqlite3ExprCacheRemove(pParse, regBase+nEq);
sqlite3ExprCode(pParse, pRight, regBase+nEq);
sqlite3VdbeAddOp2(v, OP_IsNull, regBase+nEq, addrNxt);
sqlite3ExprCodeIsNullJump(v, pRight, regBase+nEq, addrNxt);
if( zAff ){
if( sqlite3CompareAffinity(pRight, zAff[nConstraint])==SQLITE_AFF_NONE){
/* Since the comparison is to be performed with no conversions