rubenada commented on a change in pull request #1157: [CALCITE-2969] Improve
design of join-like relational expressions
URL: https://github.com/apache/calcite/pull/1157#discussion_r283678604
##########
File path: core/src/main/java/org/apache/calcite/rel/core/JoinRelType.java
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@@ -94,6 +150,37 @@ public JoinRelType cancelNullsOnRight() {
return this;
}
}
+
+ /** Transform this JoinRelType to CorrelateJoinType. **/
+ public CorrelateJoinType toLinq4j() {
+ switch (this) {
+ case INNER:
+ return CorrelateJoinType.INNER;
+ case LEFT:
+ return CorrelateJoinType.LEFT;
+ case SEMI:
+ return CorrelateJoinType.SEMI;
+ case ANTI:
+ return CorrelateJoinType.ANTI;
+ }
+ throw new IllegalStateException(
+ "Unable to convert " + this + " to CorrelateJoinType");
+ }
+
+ public boolean projectsRight() {
Review comment:
Why not keeping the `returnsJustFirstInput` name from the (now deprecated)
SemiJoinType for this new method (the logic is the same in both)?
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