sepuri sai krishna created FLINK-41321:
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Summary: A join on an ARRAY<MAP> key returns no rows, although the
same two maps compare equal with =
Key: FLINK-41321
URL: https://issues.apache.org/jira/browse/FLINK-41321
Project: Flink
Issue Type: Bug
Components: Table SQL / Planner
Affects Versions: 2.4.0
Reporter: sepuri sai krishna
Two maps holding the same entries in a different order compare equal. Wrapping
each one in an array
reverses the answer, and a join on such a column returns no rows.
{code:sql}
SELECT MAP['a',1,'b',2] = MAP['b',2,'a',1]; -- TRUE
SELECT ARRAY[MAP['a',1,'b',2]] = ARRAY[MAP['b',2,'a',1]]; -- FALSE
SELECT COUNT(*)
FROM (VALUES (ARRAY[MAP['a',1,'b',2]])) AS l(m)
JOIN (VALUES (ARRAY[MAP['b',2,'a',1]])) AS r(m) ON l.m = r.m; -- 0
{code}
The same join on the maps themselves returns 1. Same data, same join, two
answers depending on
whether the key is a map or an array of maps, with no error and no warning.
Also reproduced with
both values arriving from a table source rather than as literals.
Not FLINK-41013: that one's wrong results are all the sign of zero, and there
is no FLOAT or DOUBLE
in this query.
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