You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@calcite.apache.org by "Lai Zhou (JIRA)" <ji...@apache.org> on 2019/04/02 02:30:01 UTC
[jira] [Created] (CALCITE-2973) make EnumerableMergeJoinRule to
support a theta join
Lai Zhou created CALCITE-2973:
---------------------------------
Summary: make EnumerableMergeJoinRule to support a theta join
Key: CALCITE-2973
URL: https://issues.apache.org/jira/browse/CALCITE-2973
Project: Calcite
Issue Type: New Feature
Components: core
Affects Versions: 1.19.0
Reporter: Lai Zhou
Now the EnumerableMergeJoinRule only supports an inner and equi join.
If users make a theta-join query for a large dataset (such as 10000*10000), the nested loop join process will take dozens of time than the sort-merge join process .
So, if we can support merge-join rule for a theta join, it will bring a lot of benefits .
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)