[ASTERIXDB-1727] Adding grouping hint breaks the query

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Assignee: Taewoo Kim
• Reporter: Pouria Pirzadeh
• Created: 03/Nov/16 06:39
• Updated: 11/Nov/16 01:43
• Resolved: 11/Nov/16 01:43

Description

The following query works fine with no hint. Adding a hint to use hash-based group-by breaks it with the following error:

Variable $$43 could not be found in any input schema. [AlgebricksException]

Here is the query:

let $customer := {{ {"cid" : 1}, {"cid" : 2} }}

let $orders := {{ 
	{"oid": 100, 
	"ocid" : 1, 
	"priority" : 10,
	 "class" : "A",
	 "items" : [{"price" : 1000}, { "price" : 2000}]
	},
	{"oid": 200, 
	"ocid" : 2, 
	"priority" : 20,
	 "class" : "A",
	 "items" : [{"price" : 2000}, {"price" : 3000}]
	}
}}

for $c in $customer
for $o in $orders
where
  $c.cid = $o.ocid 
for $i in $o.items
/*+ hash*/
group by $o_orderid := $o.oid, $o_class := $o.class, $o_priority := $o.priority
  with $i
let $price := sum (
  for $t in $i 
  return 
    $t.price
)
order by $price desc, $o_class
return {  
  "o_orderkey": $o_orderid,
  "price": $price,
  "o_class": $o_class,
  "o_priority": $o_priority 
}