Yingyu Wang created CALCITE-5176:
------------------------------------
Summary: Deeply nested relational expressions leads to
StackOverflowError
Key: CALCITE-5176
URL: https://issues.apache.org/jira/browse/CALCITE-5176
Project: Calcite
Issue Type: Bug
Reporter: Yingyu Wang
The problem can be reproduced using following test using many levels of UNION:
{code:java}
@Test void testLargeUnion() {
String unionClauses = LongStream.range(0, 1000L)
.map(i -> i + Integer.MAX_VALUE)
.mapToObj(Long::toString)
.collect(Collectors.joining("\nUNION SELECT "));
final String sql = "SELECT 1 AS prescription_id\n" +
"UNION SELECT " + unionClauses;
sql(sql).ok();
} {code}
Error:
{noformat}
java.lang.StackOverflowError
at org.apache.calcite.rel.RelShuttleImpl.visit(RelShuttleImpl.java:141)
at
org.apache.calcite.sql2rel.RelDecorrelator$CorelMapBuilder.visit(RelDecorrelator.java:2943)
at
org.apache.calcite.rel.RelHomogeneousShuttle.visit(RelHomogeneousShuttle.java:76)
at
org.apache.calcite.rel.logical.LogicalUnion.accept(LogicalUnion.java:92)
at
org.apache.calcite.rel.RelShuttleImpl.visitChild(RelShuttleImpl.java:57)
at
org.apache.calcite.sql2rel.RelDecorrelator$CorelMapBuilder.visitChild(RelDecorrelator.java:2948)
at
org.apache.calcite.rel.RelShuttleImpl.visitChildren(RelShuttleImpl.java:71)
at org.apache.calcite.rel.RelShuttleImpl.visit(RelShuttleImpl.java:141)
at
org.apache.calcite.sql2rel.RelDecorrelator$CorelMapBuilder.visit(RelDecorrelator.java:2943)
at
org.apache.calcite.rel.RelHomogeneousShuttle.visit(RelHomogeneousShuttle.java:76)
at
org.apache.calcite.rel.logical.LogicalUnion.accept(LogicalUnion.java:92)
at
org.apache.calcite.rel.RelShuttleImpl.visitChild(RelShuttleImpl.java:57)
at
org.apache.calcite.sql2rel.RelDecorrelator$CorelMapBuilder.visitChild(RelDecorrelator.java:2948)
at
org.apache.calcite.rel.RelShuttleImpl.visitChildren(RelShuttleImpl.java:71)
at org.apache.calcite.rel.RelShuttleImpl.visit(RelShuttleImpl.java:141)
at
org.apache.calcite.sql2rel.RelDecorrelator$CorelMapBuilder.visit(RelDecorrelator.java:2943)
at
org.apache.calcite.rel.RelHomogeneousShuttle.visit(RelHomogeneousShuttle.java:76)
at
org.apache.calcite.rel.logical.LogicalUnion.accept(LogicalUnion.java:92){noformat}
Is there a way to limit on how deeply nested a plan can be?
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