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https://issues.apache.org/jira/browse/DRILL-1936?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Hsuan-Yi Chu updated DRILL-1936:
-------------------------------------
Assignee: Sean Hsuan-Yi Chu
> Throw an error if subquery in the where clause does not return scalar result
> ----------------------------------------------------------------------------
>
> Key: DRILL-1936
> URL: https://issues.apache.org/jira/browse/DRILL-1936
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization
> Reporter: Victoria Markman
> Assignee: Sean Hsuan-Yi Chu
>
> {code}
> #Fri Jan 02 21:20:47 EST 2015
> git.commit.id.abbrev=b491cdb
> {code}
> When result of a subquery is non scalar (regardless of if it is correlated or
> not) we should throw an error either during planning time or during runtime
> when we know cardinality of the result set.
> Currently, queries either fail to plan:
> {code}
> 0: jdbc:drill:schema=dfs> select * from cp.`tpch/nation.parquet` where
> n_name = ( select r_name from cp.`tpch/region.parquet` where n_regionkey =
> r_regionkey);
> Query failed: Query failed: Unexpected exception during fragment
> initialization: Node [rel#24659:Subset#7.LOGICAL.ANY([]).[]] could not be
> implemented; planner state:
> Root: rel#24659:Subset#7.LOGICAL.ANY([]).[]
> Original rel:
> AbstractConverter(subset=[rel#24659:Subset#7.LOGICAL.ANY([]).[]],
> convention=[LOGICAL], DrillDistributionTraitDef=[ANY([])], sort=[[]]):
> rowcount = 1.7976931348623157E308, cumulative cost = {inf}, id = 24660
> ProjectRel(subset=[rel#24658:Subset#7.NONE.ANY([]).[]], *=[$0]): rowcount =
> 1.7976931348623157E308, cumulative cost = {1.7976931348623157E308 rows,
> 1.7976931348623157E308 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 24657
> FilterRel(subset=[rel#24656:Subset#6.NONE.ANY([]).[]], condition=[=($1,
> $2)]): rowcount = 2.6965397022934733E307, cumulative cost =
> {2.6965397022934733E307 rows, 1.7976931348623157E308 cpu, 0.0 io, 0.0
> network, 0.0 memory}, id = 24655
> JoinRel(subset=[rel#24654:Subset#5.NONE.ANY([]).[]], condition=[true],
> joinType=[left]): rowcount = 1.7976931348623157E308, cumulative cost =
> {1.7976931348623157E308 rows, 0.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id =
> 24653
>
> EnumerableTableAccessRel(subset=[rel#24645:Subset#0.ENUMERABLE.ANY([]).[]],
> table=[[cp, tpch/nation.parquet]]): rowcount = 100.0, cumulative cost =
> {100.0 rows, 101.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 24623
> AggregateRel(subset=[rel#24652:Subset#4.NONE.ANY([]).[]], group=[{}],
> agg#0=[SINGLE_VALUE($0)]): rowcount = 1.7976931348623158E307, cumulative cost
> = {1.7976931348623158E307 rows, 0.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id
> = 24651
> ProjectRel(subset=[rel#24650:Subset#3.NONE.ANY([]).[]],
> r_name=[$3]): rowcount = 1.7976931348623157E308, cumulative cost =
> {1.7976931348623157E308 rows, 1.7976931348623157E308 cpu, 0.0 io, 0.0
> network, 0.0 memory}, id = 24649
> FilterRel(subset=[rel#24648:Subset#2.NONE.ANY([]).[]],
> condition=[=($1, $2)]): rowcount = 15.0, cumulative cost = {15.0 rows, 100.0
> cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 24647
>
> EnumerableTableAccessRel(subset=[rel#24646:Subset#1.ENUMERABLE.ANY([]).[]],
> table=[[cp, tpch/region.parquet]]): rowcount = 100.0, cumulative cost =
> {100.0 rows, 101.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 24624
> {code}
> or return strange error messages that are difficult to decipher:
> {code}
> 0: jdbc:drill:schema=dfs> select a.emp_num,
> . . . . . . . . . . . . > a.emp_name
> . . . . . . . . . . . . > from `emp1.json` as a
> . . . . . . . . . . . . > where a.salary > (
> . . . . . . . . . . . . > select b.salary
> . . . . . . . . . . . . > from `emp1.json` b
> . . . . . . . . . . . . > where b.dept = a.dept)
> . . . . . . . . . . . . > order by 1;
> Query failed: Query failed: Failure while running fragment., Schema is
> currently null. You must call buildSchema(SelectionVectorMode) before this
> container can return a schema. [ d800ab5d-aa5b-4371-8cb6-819dccca40aa on
> atsqa4-134.qa.lab:31010 ]
> [ d800ab5d-aa5b-4371-8cb6-819dccca40aa on atsqa4-134.qa.lab:31010 ]
> Error: exception while executing query: Failure while executing query.
> (state=,code=0)
> {code}
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