I need to run a group of select queries all at once and would like to
parallelize it. I'm attempting to do it with QueryChain but I'm
having issues getting the data I'm querying. I know that QueryChain
will always return DataRows, but it seems as though I only get the
first query's result back and not all of them. I'm using this page
from the guide as my starting point.
http://cayenne.apache.org/doc/querychain.html
QueryChain query = new QueryChain();
query.addQuery(new SQLTemplate(TypeFoo.class, "select count(*) as foo1
from TypeFoo"));
query.addQuery(new SQLTemplate(TypeBar.class, "select count(*) as foo2
from TypeBar"));
query.addQuery(new SQLTemplate(Type.class, "select count(*) as foo3
from Type"));
List<DataRow> ret = getDataContext().performQuery(query);
DataRow dr = ret.get(0);
System.out.println(ret.size()); // "1"
System.out.println(dr.keySet().size()); // "1"
System.out.println("FOO1 " + dr.get("FOO1")); // "FOO1 123"
System.out.println("FOO2 " + dr.get("FOO2")); // "FOO2 null"
System.out.println("FOO3 " + dr.get("FOO3")); // "FOO3 null"
TIA,
Eric
--
Eric Polino
Campground Automated Systems
