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Posted to issues@drill.apache.org by "Paul Rogers (JIRA)" <ji...@apache.org> on 2017/03/17 17:17:42 UTC
[jira] [Created] (DRILL-5364) Planner inserts sort for simple
constant value query
Paul Rogers created DRILL-5364:
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Summary: Planner inserts sort for simple constant value query
Key: DRILL-5364
URL: https://issues.apache.org/jira/browse/DRILL-5364
Project: Apache Drill
Issue Type: Bug
Affects Versions: 1.10.0
Reporter: Paul Rogers
Consider the following query:
{code}
SELECT CURRENT_TIMESTAMP FROM (VALUES(1))
{code}
The following is the plan generated for the query. Notice the inclusion of an unnecessary sort.
{code}
"graph" : [ {
"pop" : "Values",
"@id" : 4,
"content" : [ {
"EXPR$0" : {
"$numberLong" : 1
}
} ],
"initialAllocation" : 1000000,
"maxAllocation" : 10000000000,
"cost" : 1.0
}, {
"pop" : "project",
"@id" : 3,
"exprs" : [ {
"ref" : "`CURRENT_TIMESTAMP`",
"expr" : "current_timestamp() "
} ],
"child" : 4,
"initialAllocation" : 1000000,
"maxAllocation" : 10000000000,
"cost" : 1.0
}, {
"pop" : "external-sort",
"@id" : 2,
"child" : 3,
"orderings" : [ {
"order" : "ASC",
"expr" : "`CURRENT_TIMESTAMP`",
"nullDirection" : "UNSPECIFIED"
} ],
"reverse" : false,
"initialAllocation" : 20000000,
"maxAllocation" : 10000000000,
"cost" : 1.0
}, {
"pop" : "selection-vector-remover",
"@id" : 1,
"child" : 2,
"initialAllocation" : 1000000,
"maxAllocation" : 10000000000,
"cost" : 1.0
}, {
"pop" : "screen",
"@id" : 0,
"child" : 1,
"initialAllocation" : 1000000,
"maxAllocation" : 10000000000,
"cost" : 1.0
} ]
{code}
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