[GRASSLIST:4476] How can I speed this up?
Craig Aumann
caumann at ualberta.ca
Wed Oct 6 18:03:25 EDT 2004
The code is very simple:
for MYCAT in `echo "select distinct avicat from allpoly_att"|db.select
-c`; do
echo $MYCAT
AGE=`echo "select age from play_att where link_key = $MYCAT" |
db.select -c`
COVER=`echo "select cover from play_att where link_key = $MYCAT" |
db.select -c`
echo "update allpoly_att set age = $AGE where avicat = $MYCAT" |
db.execute
echo "update allpoly_att set cover = $COVER where avicat = $MYCAT" |
db.execute
done
Right now, it is doing about 2 updates per second - which is too slow!
Is the slowness caused by piping it through db.execute?
Other suggestions for speeding this up?
Cheers!
Craig
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