Julian Hyde created CALCITE-2470: ------------------------------------ Summary: RelBuilder.project should combine expressions if underlying node is a Project Key: CALCITE-2470 URL: https://issues.apache.org/jira/browse/CALCITE-2470 Project: Calcite Issue Type: Bug Reporter: Julian Hyde Assignee: Julian Hyde
The {{RelBuilder.project}} method should combine expressions if underlying node is a {{Project}}. For example, if {{r}} is a {{RelBuilder}} and its stack initially contains {code:java} Project(Scan(T), a, b, a + b as c){code} and we call (in pseudo-code) {code:java} r.project(a + c as d){code} then the result should be {code:java} Project(Scan(T), a + (a + b) as d){code} Today the result is {code:java} Project(Project(Scan(T), a, a + b as c), a + c as d){code} In some circumstances the result will be larger (i.e. contain more {{RexNode}} instances) but much more frequently the result will be smaller and simpler. -- This message was sent by Atlassian JIRA (v7.6.3#76005)