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https://issues.apache.org/jira/browse/CALCITE-6475?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17866886#comment-17866886
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xiong duan commented on CALCITE-6475:
-------------------------------------
[~asolimando] Hi, we use `inSubQueryThreshold` to control the IN-list to be
converted join against a VALUES or to OR predicate.
For example:
{code:java}
!use foodmart
!set outputformat mysql
!set insubquerythreshold 0
select * from "product" where ("product_id") in (12, null);
EnumerableHashJoin(condition=[=($1, $15)], joinType=[semi])
EnumerableTableScan(table=[[foodmart2, product]])
EnumerableValues(tuples=[[{ 12 }, { null }]])
!plan
!set insubquerythreshold 3
select * from "product" where ("product_id") in (12, null);
EnumerableCalc(expr#0..14=[{inputs}], expr#15=[12], expr#16=[=($t1, $t15)],
proj#0..14=[{exprs}], $condition=[$t16])
EnumerableTableScan(table=[[foodmart2, product]])
!plan
# End dummy.iq {code}
I hope it is helpful.
> RelToSql converter fails when IN-list that the values include NULL is
> converted to Values
> -----------------------------------------------------------------------------------------
>
> Key: CALCITE-6475
> URL: https://issues.apache.org/jira/browse/CALCITE-6475
> Project: Calcite
> Issue Type: Bug
> Reporter: xiong duan
> Priority: Major
>
> The SQL
> {code:java}
> select * from "product" where ("product_id") in (12, null){code}
> When we convert the IN-list to OR condition, it can run successfully. But
> when we convert it to VALUES, it will throw NPE:
> {code:java}
> java.lang.NullPointerException
> at
> org.apache.calcite.rel.rel2sql.SqlImplementor.toSql(SqlImplementor.java:1468)
> at
> org.apache.calcite.rel.rel2sql.SqlImplementor.toSql(SqlImplementor.java:1416)
> at
> org.apache.calcite.rel.rel2sql.SqlImplementor$Context.toSql(SqlImplementor.java:702)
> at
> org.apache.calcite.rel.rel2sql.RelToSqlConverter.lambda$exprList$17(RelToSqlConverter.java:1158){code}
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