On Fri, Aug 23, 2013 at 8:04 AM, Hall, Samuel L (Sam) < sam.h...@alcatel-lucent.com> wrote:
> I have a table (pubacc_lo) from the US government with 500,00+ rows. It > has latitude and longitude in three columns each for degrees, minutes and > seconds. I need a Point geometry column. So I wrote this query: > > with mydata AS (SELECT (pubacc_lo.lat_degrees + pubacc_lo.lat_minutes/60 + > pubacc_lo.lat_seconds/3600) as lat , (pubacc_lo.long_degrees + > pubacc_lo.long_minutes/60 + pubacc_lo.long_seconds/3600) as long FROM > pubacc_lo) > UPDATE pubacc_lo SET lonlat_84 = ST_SetSRID(ST_makePOINT(long,lat),4326) > FROM mydata; > > It appears to work, but is going to take days it seems to finish. Anybody > have a faster way? > > Create a new table, rather than updating the existing one. CREATE TABLE pubacc_lo_new AS select *, (pubacc_lo.lat_degrees + pubacc_lo.lat_minutes/60 + pubacc_lo.lat_seconds/3600) as lat , (pubacc_lo.long_degrees + pubacc_lo.long_minutes/60 + pubacc_lo.long_seconds/3600) as long from pubacc_lo; Then either rename them, or use the new table.
