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### What changes were proposed in this pull request? Using char and varchar with the string functions and some other expressions might be confusing and ambiguous. In this PR we add test cases for char and varchar with these operations to reveal these behavior and see if we can come up with a general pattern for them. ### Why are the changes needed? test coverage ### Does this PR introduce _any_ user-facing change? no ### How was this patch tested? new tests Closes #32010 from yaooqinn/SPARK-34908. Authored-by: Kent Yao <yao@apache.org> Signed-off-by: HyukjinKwon <gurwls223@apache.org> |
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