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Evaluate multiple window functions in a single pass if they use the same

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window definition. Add xValue callbacks for other built-in aggregate
functions.

FossilOrigin-Name: c9f0f140941660ff368e5bb5752d54feb1964b7a9eac986d4bfb8f24a1c20d86
This commit is contained in:
dan
2018-05-17 19:24:08 +00:00
parent 2e362f9775
commit e2f781b9d1
9 changed files with 173 additions and 87 deletions
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14
src/resolve.c
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@@ -776,13 +776,15 @@ static int resolveExprStep(Walker *pWalker, Expr *pExpr){
sqlite3WalkExprList(pWalker, pList);
if( is_agg ){
if( pExpr->pWin ){
pExpr->pWin->pNextWin = pNC->pWin;
pNC->pWin = pExpr->pWin;
if( 0==pNC->pWin
|| 0==sqlite3WindowCompare(pParse, pNC->pWin, pExpr->pWin)
){
pExpr->pWin->pNextWin = pNC->pWin;
pNC->pWin = pExpr->pWin;
}
pExpr->pWin->pFunc = pDef;
pExpr->pWin->nArg = pExpr->x.pList->nExpr;
}
else
{
pExpr->pWin->nArg = (pExpr->x.pList ? pExpr->x.pList->nExpr : 0);
}else{
NameContext *pNC2 = pNC;
pExpr->op = TK_AGG_FUNCTION;
pExpr->op2 = 0;