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/* syntax version 1 */
/* postgres can not */
$pred = ($x)->{ return $x > 0 };
select
ListExtract([],"a"),
ListTakeWhile([], $pred),
ListSkipWhile([], $pred),
ListTakeWhileInclusive([], $pred),
ListSkipWhileInclusive([], $pred),
ListAggregate([], AGGREGATION_FACTORY("Sum")),
ToDict([]),
ToMultiDict([]),
ToSet([]),
SetIsDisjoint({1, 2, 3}, []),
SetIncludes({1, 2, 3}, []),
Yql::Fold([],0,($x,$y)->{return $x+$y}),
Yql::Fold1([],($x)->{return $x},($x,$y)->{return $x+$y}),
Yql::FoldMap([],0,($x,$y)->{return ($x+$y,$y)}),
Yql::Fold1Map([],($x)->{return ($x,$x)},($x,$y)->{return ($x+$y,$y)}),
Yql::LazyList([]),
ListExtract(Just([]),"a"),
ListTakeWhile(Just([]), $pred),
ListSkipWhile(Just([]), $pred),
ListTakeWhileInclusive(Just([]), $pred),
ListSkipWhileInclusive(Just([]), $pred),
ListAggregate(Just([]), AGGREGATION_FACTORY("Sum")),
ToDict(Just([])),
ToMultiDict(Just([])),
ToSet(Just([])),
SetIsDisjoint({1, 2, 3}, Just([])),
SetIncludes({1, 2, 3}, Just([])),
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