public override Expr SplitAgg()
{
var child = child_();
// child of tsum/tcount will be replace to bypass aggfunc child during aggfunc intialization
var tsum = new AggSum(new List <Expr> {
child
}); tsum.dummyBind();
var sumchild = new AggSum(new List <Expr> {
child.Clone()
}); sumchild.dummyBind();
var sumchildref = new AggrRef(sumchild, -1);
tsum.children_[0] = sumchildref;
var tcount = new AggSum(new List <Expr> {
child
}); tcount.dummyBind();
var countchild = new AggCount(new List <Expr> {
child.Clone()
}); countchild.dummyBind();
var countchildref = new AggrRef(countchild, -1);
tcount.children_[0] = countchildref;
var processed = new BinExpr(tsum, tcount, "/");
processed.dummyBind();
return(processed);
}
static public FuncExpr BuildFuncExpr(string funcName, List <Expr> args)
{
FuncExpr r = null;
var func = funcName.Trim().ToLower();
switch (func)
{
case "sum": r = new AggSum(args[0]); break;
case "min": r = new AggMin(args[0]); break;
case "max": r = new AggMax(args[0]); break;
case "avg": r = new AggAvg(args[0]); break;
case "stddev_samp": r = new AggStddevSamp(args[0]); break;
case "count":
if (args.Count == 0)
{
r = new AggCountStar(null);
}
else
{
r = new AggCount(args[0]);
}
break;
case "substr":
case "substring": r = new SubstringFunc(args); break;
case "upper": r = new UpperFunc(args); break;
case "year": r = new YearFunc(args); break;
case "repeat": r = new RepeatFunc(args); break;
case "round": r = new RoundFunc(args); break;
case "coalesce": r = new CoalesceFunc(args); break;
case "hash": r = new HashFunc(args); break;
default:
if (ExternalFunctions.set_.ContainsKey(funcName))
{
r = new ExternalFunc(func, args);
}
else
{
r = new FuncExpr(funcName, args);
}
break;
}
// verify arguments count
Utils.Checks(args.Count == r.argcnt_, $"{r.argcnt_} argument is expected");
return(r);
}
static public FuncExpr BuildFuncExpr(string funcName, List <Expr> args)
{
var func = funcName.Trim().ToLower();
FuncExpr r;
switch (func)
{
case "sum": r = new AggSum(args); break;
case "min": r = new AggMin(args); break;
case "max": r = new AggMax(args); break;
case "avg": r = new AggAvg(args); break;
case "stddev_samp": r = new AggStddevSamp(args); break;
case "count":
if (args.Count == 0)
{
r = new AggCountStar(null);
}
else
{
r = new AggCount(args);
}
break;
case "substr":
case "substring": r = new SubstringFunc(args); break;
case "upper": r = new UpperFunc(args); break;
case "year": r = new YearFunc(args); break;
case "date": r = new DateFunc(args); break;
case "repeat": r = new RepeatFunc(args); break;
case "abs": r = new AbsFunc(args); break;
case "round": r = new RoundFunc(args); break;
case "coalesce": r = new CoalesceFunc(args); break;
case "hash": r = new HashFunc(args); break;
case "tumble": r = new TumbleWindow(args); break;
case "tumble_start": r = new TumbleStart(args); break;
case "tumble_end": r = new TumbleEnd(args); break;
case "hop": r = new HopWindow(args); break;
case "session": r = new SessionWindow(args); break;
default:
if (ExternalFunctions.set_.ContainsKey(funcName))
{
r = new ExternalFunc(func, args);
}
else
{
r = new FuncExpr(funcName, args);
}
break;
}
// verify arguments count
if (args.Count != r.argcnt_)
{
throw new SemanticAnalyzeException($"{r.argcnt_} argument is expected");
}
return(r);
}