Bohdan Kazydub created CALCITE-3055:
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Summary: TableScan type mismatch in VolcanoPlanner
Key: CALCITE-3055
URL: https://issues.apache.org/jira/browse/CALCITE-3055
Project: Calcite
Issue Type: Bug
Affects Versions: 1.19.0
Reporter: Bohdan Kazydub
In Drill with Calcite updated to 1.19.0 we observe following problem:
the following query
{code}
CREATE VIEW nation_view_testunionall_expandable_star AS select n_name,
n_nationkey FROM cp.`tpch/nation.parquet`;
(SELECT n_comment, n_regionkey FROM cp.`tpch/nation.parquet` LIMIT 5) UNION ALL
(SELECT * FROM nation_view_testunionall_expandable_star LIMIT 5)
{code}
fails with
{code}
15:46:06.005 [2333c7f1-89f3-0b80-8369-68e24895729e:foreman] ERROR
o.a.drill.exec.work.foreman.Foreman - SYSTEM ERROR: AssertionError: Type
mismatch:
left:
RecordType(DYNAMIC_STAR **, ANY n_comment, ANY n_regionkey) NOT NULL
right:
RecordType(DYNAMIC_STAR **, ANY n_comment, ANY n_regionkey, ANY n_name, ANY
n_nationkey) NOT NULL
{code}
when Volcano planner is registering rel nodes. The initial plan is the
following:
{code}
LogicalUnion(all=[true]): rowcount = 10.0, cumulative cost = \{520.0 rows,
940.755032994728 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 74
LogicalSort(fetch=[5]): rowcount = 5.0, cumulative cost = \{205.0 rows,
365.377516497364 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 68
LogicalProject(n_comment=[$1], n_regionkey=[$2]): rowcount = 100.0,
cumulative cost = \{200.0 rows, 301.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id
= 67
EnumerableTableScan(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
= 29
LogicalSort(fetch=[5]): rowcount = 5.0, cumulative cost = \{305.0 rows,
565.377516497364 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 73
LogicalProject(n_name=[$0], n_nationkey=[$1]): rowcount = 100.0, cumulative
cost = \{300.0 rows, 501.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 72
LogicalProject(n_name=[$3], n_nationkey=[$4]): rowcount = 100.0,
cumulative cost = \{200.0 rows, 301.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id
= 71
EnumerableTableScan(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 = 34
{code}
It contains two EnumerableTableScan operators with different row types
specified in the error message above. In the scope of CALCITE-2454 was removed
rel data type from the key in the \{{VolcanoPlanner.mapDigestToRel}} map.
To fix this, `{{TableScan` should include rowType}} item in
{{AbstractRelNode#explainTerms(RelWriter)}} method because in case of dynamic
tables there is the same digest for different operators. The same thing was
done for Values operator and literals in conditions.
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