alaneuler created CALCITE-5370:
----------------------------------
Summary: AGGREGATE_REMOVE will convert certain SQL statement into
RelSubSet
Key: CALCITE-5370
URL: https://issues.apache.org/jira/browse/CALCITE-5370
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.32.0
Reporter: alaneuler
SQL:
{code:java}
SELECT name, sum(count_inner)
FROM
(SELECT name, COUNT(*) AS count_inner
FROM pt_lsb
GROUP BY name
ORDER BY count_inner LIMIT 100)
GROUP BY name {code}
Table:
{code:java}
CREATE TABLE IF NOT EXISTS `pt_lsb` (name VARCHAR(20) NOT NULL) {code}
After the `onMatch` method of rule AGGREGATE_REMOVE, it converts the RelNode
into a RelSubset and this RelSubset cannot be converted into a SQL string:
Error:
{code:java}
Exception in thread "main" java.lang.AssertionError: Need to implement
org.apache.calcite.plan.volcano.RelSubset
at
org.apache.calcite.rel.rel2sql.RelToSqlConverter.visit(RelToSqlConverter.java:170)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native
Method)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.apache.calcite.util.ReflectUtil$2.invoke(ReflectUtil.java:531)
at
org.apache.calcite.rel.rel2sql.RelToSqlConverter.dispatch(RelToSqlConverter.java:139)
at
org.apache.calcite.rel.rel2sql.RelToSqlConverter.visitInput(RelToSqlConverter.java:147)
at
org.apache.calcite.rel.rel2sql.SqlImplementor.visitInput(SqlImplementor.java:216)
at
org.apache.calcite.rel.rel2sql.SqlImplementor.visitInput(SqlImplementor.java:204)
at
org.apache.calcite.rel.rel2sql.SqlImplementor.visitRoot(SqlImplementor.java:180)
at me.alaneuler.calcite.ng.demo.util.SqlUtils.toSqlString(SqlUtils.java:13)
at me.alaneuler.calcite.ng.demo.util.SqlUtils.toSqlString(SqlUtils.java:17)
at me.alaneuler.calcite.ng.demo.AggRemoveMain.main(AggRemoveMain.java:51)
Suppressed: java.lang.Throwable: Error while converting RelNode to SqlNode:
HepRelVertex(subset=[rel#17:RelSubset#0.NONE.[]]) at
org.apache.calcite.util.Util.throwAsRuntime(Util.java:967)
at
org.apache.calcite.rel.rel2sql.SqlImplementor.visitRoot(SqlImplementor.java:182)
... 3 more {code}
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