petern48 commented on issue #2385:
URL: https://github.com/apache/sedona/issues/2385#issuecomment-3392792948
Turns out this isn't straightforward, since there's no direct function
equivalent. See the discussion in the above PR.
A few ideas I have that I don't quite have time to try at the moment:
1) somehow leverage `ST_DumpPoints`
2) The below hacky logic. idk if it would work properly. We'd also have to
wrap it in a case statement to make sure that the below only applies to
linestrings and we return False for all other cases (including polygon).
```sql
SELECT ST_MakePolygon(
ST_AddPoint(
column,
ST_StartPoint(column)
)
)
```
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