Aleksey Plekhanov created IGNITE-18363:
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Summary: Calcite engine. Limit with offset can return negative
estimated rows count
Key: IGNITE-18363
URL: https://issues.apache.org/jira/browse/IGNITE-18363
Project: Ignite
Issue Type: Bug
Reporter: Aleksey Plekhanov
Assignee: Aleksey Plekhanov
Fix For: 2.15
Limit with offset can return negative estimated rows count, this will throw an
assertion error if limit is used as input of another relational operator.
For example:
{code:java}
CREATE TABLE t(id INT);
INSERT INTO t VALUES (1), (2), (3);
SELECT (SELECT id FROM t ORDER BY id LIMIT 1 OFFSET 10); {code}
Throws:
{noformat}
java.lang.AssertionError: null
at
org.apache.calcite.rel.metadata.RelMdUtil.isNonNegative(RelMdUtil.java:988)
~[calcite-core-1.32.0.jar:1.32.0]
at
org.apache.calcite.rel.metadata.RelMdUtil.validateResult(RelMdUtil.java:977)
~[calcite-core-1.32.0.jar:1.32.0]
at
org.apache.calcite.rel.metadata.RelMetadataQuery.getRowCount(RelMetadataQuery.java:259)
~[calcite-core-1.32.0.jar:1.32.0]
at
org.apache.calcite.rel.metadata.RelMdRowCount.getRowCount(RelMdRowCount.java:73)
~[calcite-core-1.32.0.jar:1.32.0]
at
org.apache.calcite.rel.metadata.janino.GeneratedMetadata_RowCountHandler.getRowCount_$(Unknown
Source) ~[?:?]
at
org.apache.calcite.rel.metadata.janino.GeneratedMetadata_RowCountHandler.getRowCount(Unknown
Source) ~[?:?]
at
org.apache.calcite.rel.metadata.RelMetadataQuery.getRowCount(RelMetadataQuery.java:258)
~[calcite-core-1.32.0.jar:1.32.0]
at
org.apache.ignite.internal.processors.query.calcite.rel.IgniteAggregate.computeSelfCostHash(IgniteAggregate.java:94)
~[classes/:?]{noformat}
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