An obsolete pr, please don't pay attention #40380
Closed
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What changes were proposed in this pull request?
Point out a misleading example in doc and give an explanation
Why are the changes needed?
The original statement is misleading, and if the code is copied, it will give an error.So I post the reason for the error, and a feasible solution to write multiple columns.
Does this PR introduce any user-facing change?
No
How was this patch tested?
Only parts of the documentation changed, and I successfully run the illustrative example code