ydb/yql/essentials/tests/s-expressions/suites/ImplictCasts/ImplicitEqualsOverStruct.yqls

(
(let config (DataSource 'config))

(let res_sink (DataSink 'result))

# Struct<Int16, Int16>> -> Struct<Uint32, Uint64> (false)
(let value (AsStruct '('"a" (Int16 '0)) '('"b" (Int16 '"-1"))))
(let commonType (StructType '('"a" (DataType 'Uint32)) '('"b" (DataType 'Uint64))))
(let imlicitEqualsResult (Exists (StrictCast value commonType)))
(let world (Write! world res_sink (Key) imlicitEqualsResult '('('type))))

# Struct<Uint16, Uint16>> -> Struct<Uint32, Uint64> (true)
(let value (AsStruct '('"a" (Uint16 '0)) '('"b" (Uint16 '0))))
(let commonType (StructType '('"a" (DataType 'Uint32)) '('"b" (DataType 'Uint64))))
(let imlicitEqualsResult (Exists (StrictCast value commonType)))
(let world (Write! world res_sink (Key) imlicitEqualsResult '('('type))))

(let world (Commit! world res_sink))
(return world)

)