diff options
| author | drh <drh@noemail.net> | 2017-07-07 13:59:34 +0000 |
|---|---|---|
| committer | drh <drh@noemail.net> | 2017-07-07 13:59:34 +0000 |
| commit | d10866798dbd40430454681fc0da450cf6065af7 (patch) | |
| tree | 7a71c7bb5045cda1b47152fc77f8367e0bd61d6f /src/expr.c | |
| parent | c2d14a9a334cdd6a043ceb0f7eaebe184310a0c5 (diff) | |
| download | sqlite-d10866798dbd40430454681fc0da450cf6065af7.tar.gz sqlite-d10866798dbd40430454681fc0da450cf6065af7.zip | |
Exploit the fact that Expr.pRight and Expr.x are never used at the same time
for a small performance gain.
FossilOrigin-Name: aacbb9a461fdb34c7f9c8ce348e44c3e96c93334f210d438d92bfac1794dc686
Diffstat (limited to 'src/expr.c')
| -rw-r--r-- | src/expr.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/expr.c b/src/expr.c index 2e8b19603..28416286a 100644 --- a/src/expr.c +++ b/src/expr.c @@ -1025,8 +1025,9 @@ static SQLITE_NOINLINE void sqlite3ExprDeleteNN(sqlite3 *db, Expr *p){ /* The Expr.x union is never used at the same time as Expr.pRight */ assert( p->x.pList==0 || p->pRight==0 ); if( p->pLeft && p->op!=TK_SELECT_COLUMN ) sqlite3ExprDeleteNN(db, p->pLeft); - sqlite3ExprDelete(db, p->pRight); - if( ExprHasProperty(p, EP_xIsSelect) ){ + if( p->pRight ){ + sqlite3ExprDeleteNN(db, p->pRight); + }else if( ExprHasProperty(p, EP_xIsSelect) ){ sqlite3SelectDelete(db, p->x.pSelect); }else{ sqlite3ExprListDelete(db, p->x.pList); |