IoTDB: The value got by xxx (column name) is NULL.

When using Session's SessionDataSet.Iterator() to traverse data, this phenomenon may occur:
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The reason is that the next method of iterator is not called. This sentence cannot be saved. Even if the result is only one line, next must be called first, which is the same as the result set traversal method of jdbc.

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Origin blog.csdn.net/qiaojialin/article/details/108120539