Hi, I am fairly new to Postgis so I like some feedback whether I am going through the right moves. I am trying to create a new table with the intersected results from two input polygon tables. Both tables are in NZMG (2193) the first table has 100000+ records, the second table has 400000+ records. The query I am using is:
Create table ablc_pol with OIDS as SELECT intersection(a.geom, l.geom) as intersect_geom, a.*, l."CLASS",l."NAME", l."REPLID" from first_table a, second_table l Where a.geom && l.geom AND intersects(a.geom, l.geom); Currently this query is taking >200 hours before I cancelled it because I wasn't sure it would ever end. However, running it on a small subset showed satisfactory results... I am using version 1.2 on Windows. Does it matter which table I put first in the query or would the optimizer take care of that? Cheers, Niels
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