[SEDONA-408] Set a reasonable default size for RasterUDT #1046
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Is this PR related to a JIRA ticket?
[SEDONA-XXX] my subject.What changes were proposed in this PR?
Set a default size for raster values. This is used by the optimizer to decide whether to broadcast the DataFrame or not.
The default value was 100 bytes before applying this patch, which is the default size of BinaryType. This is almost always too small for RasterUDT and will lead to large raster DataFrames being mistakenly broadcasted. We can override this method and set a better default size for RasterUDT. Maybe 512 KB is a reasonable default value.
How was this patch tested?
Manually tested using medium-sized datasets.
Did this PR include necessary documentation updates?