godfrey he created FLINK-12509:
----------------------------------
Summary: Introduce planner rules about non semi/anti join
Key: FLINK-12509
URL: https://issues.apache.org/jira/browse/FLINK-12509
Project: Flink
Issue Type: New Feature
Components: Table SQL / Planner
Reporter: godfrey he
Assignee: godfrey he
This issue aims to introduce planner rules about non semi/anti join, rules
include:
1. {{JoinConditionEqualityTransferRule}}, that converts Join's conditions to
the left or right table's own independent filter as much as possible, so that
the rules of filter-push-down can push down the filter to below.
2. {{JoinConditionTypeCoerceRule}}, that coerces the both sides of EQUALS(`=`)
operator in Join condition to the same type while sans nullability.
3. {{JoinDependentConditionPushDownRule}}, that extracts some sub-conditions in
the Join OR condition that can be pushed into join inputs by
{{FlinkFilterJoinRule}}.
4. {{JoinDeriveNullFilterRule}} filters null values before join if the count
null value from join input
is greater than {{sql.optimizer.join.null.filter.threshold}}
5. {{SimplifyJoinConditionRule}}, that apply various simplifying
transformations on join condition.
planner rules about semi/anti join will be introduced in another issue.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
