Is it possible to check a ResultSet to see if it contains a column label for the current row. I would assume that it is backed by some kind of Map, so providing an rs.contains("label") method can't be that expensive, but I can't find one in the javadoc.Is it possible to check a ResultSet to see if i
阅读背景：
测试ResultSet以查看它是否包含列标签
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