[postgis-devel] ST_Union for Raster

Nathaniel Clay clay.nathaniel at gmail.com
Thu Jan 19 15:41:52 PST 2012


Hi all,

I was reading the code for Union for raster. I came away with the
impression that St_Union operating on a raster copies cell by cell is this
correct?  The is this leading to the high execution time that I am seeing?

Thanks,

Nathaniel Hunter Clay
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