Github user hakanmemisoglu commented on a diff in the pull request:
https://github.com/apache/incubator-quickstep/pull/73#discussion_r73117361
--- Diff: query_optimizer/physical/HashJoin.hpp ---
@@ -172,18 +192,21 @@ class HashJoin : public BinaryJoin {
const std::vector<expressions::AttributeReferencePtr>
&right_join_attributes,
const expressions::PredicatePtr &residual_predicate,
const std::vector<expressions::NamedExpressionPtr>
&project_expressions,
- const JoinType join_type)
+ const JoinType join_type,
+ const std::size_t estimated_right_cardinality)
: BinaryJoin(left, right, project_expressions),
left_join_attributes_(left_join_attributes),
right_join_attributes_(right_join_attributes),
residual_predicate_(residual_predicate),
- join_type_(join_type) {
+ join_type_(join_type),
+ estimated_right_cardinality_(estimated_right_cardinality) {
}
std::vector<expressions::AttributeReferencePtr> left_join_attributes_;
std::vector<expressions::AttributeReferencePtr> right_join_attributes_;
expressions::PredicatePtr residual_predicate_;
JoinType join_type_;
+ std::size_t estimated_right_cardinality_;
--- End diff --
@jianqiao, I will remove it. Then I need to reintroduce the hashtable size
estimation logic into ExecutionGenerator.
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