Jiefan Li created CALCITE-4669:
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Summary: Allow empty MAP[] constructors
Key: CALCITE-4669
URL: https://issues.apache.org/jira/browse/CALCITE-4669
Project: Calcite
Issue Type: Wish
Reporter: Jiefan Li
Similar ticket: https://issues.apache.org/jira/browse/CALCITE-3504
Currently an MAP expression requires at least 2 element. However, Hive supports
empty MAP() syntax.
Please allow empty MAP expressions:
{code:sql}
SELECT MAP[] FROM foo;
{code}
cc: [~wmoustafa]
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