[docs](function) Add ST_IsClosed documentation - #4102
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@YanzhiJin5 Why is only an English document written? Please supplement the Chinese‑language document. |
morrySnow
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### What problem does this PR solve? Issue Number: ref #48203 Related PR: apache/doris-website#4102 Problem Summary: Add the `ST_IsClosed` spatial scalar function. For a valid LineString, the function returns: * `true` when the first and last points are exactly equal * `false` when the LineString is open * `NULL` for a `NULL` input * `NULL` for a non-LineString or invalid encoded geometry The implementation uses exact S2 point equality without introducing a tolerance. This PR also adds Nereids registration and visitor support, FE and BE unit tests, and a self-asserting SQL regression suite. ### Release note Add the `ST_IsClosed` spatial function.
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Thanks for pointing this out. I’ve added the Chinese-language counterpart for |
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Description
Adds the English dev documentation for
ST_IsClosed.The documentation covers closed and open LineStrings, NULL input, non-LineString input, and the exact endpoint comparison semantics without a distance tolerance.
Only the dev English documentation is included because
ST_IsClosedcurrently exists only on Doris master.Related code PR: apache/doris#67350
The SQL examples were checked against the implementation and its tests but were not executed on a local Doris cluster.