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Add the ability to factor constant functions out of inner loops. But do

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not factor out non-constant functions, like random().

FossilOrigin-Name: 1b0f779e19a5c0d51eddd2d88db50034d77d132c
This commit is contained in:
drh
2013-11-21 14:33:48 +00:00
parent e09f43f8b7
commit b1fba2868b
6 changed files with 36 additions and 23 deletions
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src/resolve.c
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@@ -725,6 +725,7 @@ static int resolveExprStep(Walker *pWalker, Expr *pExpr){
pExpr->op = TK_NULL;
return WRC_Prune;
}
if( pDef->funcFlags & SQLITE_FUNC_CONSTANT ) ExprSetProperty(pExpr,EP_Constant);
}
#endif
if( is_agg && (pNC->ncFlags & NC_AllowAgg)==0 ){