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(
(let world (Configure! world (DataSource '"yt" '"$all") '"Attr" '"mapjoinlimit" '"1m"))
(let mr_source (DataSource 'yt 'plato))
(let x (Read! world mr_source (Key '('table (String 'Input1))) '('key 'subkey 'value) '()))
(let world (Left! x))
(let table1 (Right! x))
(let table1 (Map table1 (lambda '(item) (AsStruct
'('key (Just (Member item 'key)))
'('subkey (Just (Member item 'subkey)))
'('value (Just (Member item 'value)))))))
(let x (Read! world mr_source (Key '('table (String 'Input2))) '('key 'subkey 'value) '()))
(let world (Left! x))
(let table2 (Right! x))
(let table2 (Map table2 (lambda '(item) (AsStruct
'('key (Just (Member item 'key)))
'('subkey (Just (Member item 'subkey)))
'('value (Just (Member item 'value)))))))
(let join (EquiJoin '(table1 'a) '(table2 'b)
'('Right '"a" '"b" '('"a" '"key") '('"b" '"key" ) '('('left 'unique)))
'()))
(let res_sink (DataSink 'result))
(let world (Write! world res_sink (Key) join '('('type))))
(let world (Commit! world res_sink))
(return world)
)
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