[
https://issues.apache.org/jira/browse/CALCITE-4188?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17262489#comment-17262489
]
JIasen Sheng commented on CALCITE-4188:
---------------------------------------
[~rubenql] EnumerableCorrelate over JDBC is not supported at the moment
JdbcToEnumerableConverter will eventually generate executable sql statements
from the plan, which will eventually be executed by jdbc.
https://github.com/apache/calcite/blob/404f968f6079360621896e6ee20ec12488a40bc2/core/src/main/java/org/apache/calcite/adapter/jdbc/JdbcToEnumerableConverter.java#L107
https://github.com/apache/calcite/blob/404f968f6079360621896e6ee20ec12488a40bc2/core/src/main/java/org/apache/calcite/adapter/jdbc/JdbcToEnumerableConverter.java#L174
EnumerableCorrelate generates a value during the execution process. When
batchSize>1, the value will undergo related changes. This process is to fill in
the corresponding variable before the sql is executed.
SELECT * FROM SCOTT.emp WHERE ename =EnumerableCorrelateValue1 And empno
<EnumerableCorrelateValue2
Taking into account the SQL injection problem and the similarity between the
process and SQLDynamicParam, I think it is a reasonable way to implement the
EnumerableCorrelate variable as a special dynamic parameter
> support EnumerableBatchNestedLoopJoin in JdbcToEnumerableConverter implement
> ----------------------------------------------------------------------------
>
> Key: CALCITE-4188
> URL: https://issues.apache.org/jira/browse/CALCITE-4188
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.25.0
> Reporter: JIasen Sheng
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> support EnumerableBatchNestedLoopJoin in JdbcToEnumerableConverter implement
> function
> ENUMERABLE_BATCH_NESTED_LOOP_JOIN_RULE make correlate RexNode,
> when implementing,
> [https://github.com/apache/calcite/blob/eab043f4ef43112c16a9f6708e6c53a15b1cfbe0/core/src/main/java/org/apache/calcite/rel/rel2sql/SqlImplementor.java#L675]
> will throw null Exception
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
