Github user hvanhovell commented on the issue:
https://github.com/apache/spark/pull/21826
I am not sure there is much to do here. `OR` is the standard syntax for or,
and `||` is pretty common syntax for string concatenation. Removing `||` breaks
binary compatibility and also makes our SQL dialect less compatible with
others. The only thing I think that might be worth fixing is the precedence of
`||` in the example, parsing `id==1 || id==2` into `('id = concat(1, 'id)) = 2`
is a bit weird IMO.
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