with 5m result set you can set fetchsize to any value it has no effect
@GrabConfig(systemClassLoader = true)
@Grab(group='postgresql', module='postgresql', version='8.3-603.jdbc4')
@Grab(group='commons-lang', module='commons-lang', version='2.6')
import groovy.sql.Sql
import org.apache.commons.lang.math.RandomUtils
def sql=Sql.newInstance("jdbc:postgresql://localhost/grails",
"postgres", "postgres")
sql.setCacheStatements(true)
/*
sql.withTransaction {
for (i in 1..5000000 ) {
sql.executeUpdate("insert into public.test (a) values (?)",
[RandomUtils.nextLong()])
}
}
*/
def c = sql.getConnection()
def s = c.createStatement()
s.setFetchSize(100000)
def r = s.executeQuery("select * from public.test")
def cnt = 0
while (r.next()) {
cnt++
}
println "${cnt} rows."
sql.close()
