#! /bin/sh
set -e

n=831
t=wide_upsert

psql -c "DROP TABLE IF EXISTS $t"

cols='id int'
vals='0'
sets='id=0'
for a in `seq -w 0 $n`
do
	c="c$a int"
	cols="$cols, c$a int"

	vals="$vals, \$1"
	sets="$sets, c$a=\$1"
done

echo $cols
psql -c "CREATE TABLE $t ($cols, PRIMARY KEY (id))"

set -x
psql -c "PREPARE x AS INSERT INTO $t VALUES ($vals) ON CONFLICT (id) DO UPDATE SET $sets; EXECUTE x(0)"