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Dmitry Lychagin resolved ASTERIXDB-2750. ---------------------------------------- Resolution: Fixed > Incorrect result with simple unnest (",") followed by JOIN > ---------------------------------------------------------- > > Key: ASTERIXDB-2750 > URL: https://issues.apache.org/jira/browse/ASTERIXDB-2750 > Project: Apache AsterixDB > Issue Type: Bug > Components: COMP - Compiler > Affects Versions: 0.9.4.1 > Reporter: Dmitry Lychagin > Assignee: Dmitry Lychagin > Priority: Major > Fix For: 0.9.5 > > > Simple unnest (",") should be equivalent to using UNNEST keyword. However a > combination of simple unnest followed by JOIN produces incorrect result. > Consider these 3 queries which should return the same result (24 = 2*3*4): > Q1: (UNNEST then JOIN ON TRUE) > {noformat} > with > t1 as [ { "x": 1, "y": [10, 11, 12] }, { "x": 2, "y": [20, 21, 22] } ], > t2 as [ 100, 101, 102, 103 ] > from t1 as t1 unnest t1.y as y join t2 as t2 on true > select value count(*) > {noformat} > Correct: returns 24 as expected. > Q2: ("," then ",") > {noformat} > with > t1 as [ { "x": 1, "y": [10, 11, 12] }, { "x": 2, "y": [20, 21, 22] } ], > t2 as [ 100, 101, 102, 103 ] > from t1 as t1, t1.y as y, t2 as t2 > select value count(*) > {noformat} > Correct: returns 24 as expected. > Q3: ("," then JOIN ON TRUE) > {noformat} > with > t1 as [ { "x": 1, "y": [10, 11, 12] }, { "x": 2, "y": [20, 21, 22] } ], > t2 as [ 100, 101, 102, 103 ] > from t1 as t1, t1.y as y join t2 as t2 on true > select value count(*) > {noformat} > INCORRECT: returns 48 -- This message was sent by Atlassian Jira (v8.3.4#803005)