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Performance improvement and size reduction in the Expr node allocator

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function sqlite3PExpr().

FossilOrigin-Name: 2a81763e68cdf9b8c46389b1e1a87bc2084b53e7
This commit is contained in:
drh
2016-12-06 22:47:23 +00:00
parent 2b519ab015
commit abfd35ea03
10 changed files with 77 additions and 76 deletions
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12
src/expr.c
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@@ -427,7 +427,7 @@ Expr *sqlite3ExprForVectorField(
** with the same pLeft pointer to the pVector, but only one of them
** will own the pVector.
*/
pRet = sqlite3PExpr(pParse, TK_SELECT_COLUMN, 0, 0, 0);
pRet = sqlite3PExpr(pParse, TK_SELECT_COLUMN, 0, 0);
if( pRet ){
pRet->iColumn = iField;
pRet->pLeft = pVector;
@@ -819,15 +819,19 @@ Expr *sqlite3PExpr(
Parse *pParse, /* Parsing context */
int op, /* Expression opcode */
Expr *pLeft, /* Left operand */
Expr *pRight, /* Right operand */
const Token *pToken /* Argument token */
Expr *pRight /* Right operand */
){
Expr *p;
if( op==TK_AND && pParse->nErr==0 ){
/* Take advantage of short-circuit false optimization for AND */
p = sqlite3ExprAnd(pParse->db, pLeft, pRight);
}else{
p = sqlite3ExprAlloc(pParse->db, op & TKFLG_MASK, pToken, 1);
p = sqlite3DbMallocRawNN(pParse->db, sizeof(Expr));
if( p ){
memset(p, 0, sizeof(Expr));
p->op = op & TKFLG_MASK;
p->iAgg = -1;
}
sqlite3ExprAttachSubtrees(pParse->db, p, pLeft, pRight);
}
if( p ) {