Julian Hyde created CALCITE-4719: ------------------------------------ Summary: Add variants of RexSubQuery that collect sub-queries into MULTISET, ARRAY and MAP collections Key: CALCITE-4719 URL: https://issues.apache.org/jira/browse/CALCITE-4719 Project: Calcite Issue Type: Bug Environment: Add variants of {{RexSubQuery}} that collect sub-queries into {{MULTISET}}, {{ARRAY}} and {{MAP}} collections. We currently use {{RexSubQuery}} for scalar sub-query, {{EXISTS}}, {{IN}} and some others; this allows us to defer conversion: convert via rewrites ({{RelOptRule}}) rather than in {{SqlToRelConverter}}. The same benefits would apply to {{MULTISET}}, {{ARRAY}} and {{MAP}} sub-queries.
Examples: {code} SELECT deptno, MULTISET(SELECT * FROM Emp WHERE deptno = d.deptno) FROM Dept AS d SELECT deptno, ARRAY(SELECT * FROM Emp WHERE deptno = d.deptno) FROM Dept AS d SELECT deptno, MAP(SELECT empno, job FROM Emp WHERE deptno = d.deptno) FROM Dept AS d {code} Reporter: Julian Hyde -- This message was sent by Atlassian Jira (v8.3.4#803005)