[CALCITE-1522] RelBuilder.union() hits assertion when arguments can't have a common row type

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.11.0
• Component/s: core
• Labels: union
• Assignee: Julian Hyde
• Reporter: Jess Balint
• Created: 01/Dec/16 20:01
• Updated: 06/Jan/17 19:30
• Resolved: 07/Dec/16 06:49

Description

Creating a union throws an AssertionError when a common row type cannot be computed. e.g. (modified RelBuilderTest.testUnion()):

        builder.scan("DEPT")
            .project(builder.field("DEPTNO"))
            .scan("EMP")
            .project(builder.field("EMPNO"), builder.field("SAL"))
            .union(true)

throws:

java.lang.AssertionError: LogicalUnion#4

	at org.apache.calcite.rel.AbstractRelNode.getRowType(AbstractRelNode.java:220)
	at org.apache.calcite.tools.RelBuilder$Frame.<init>(RelBuilder.java:1623)
	at org.apache.calcite.tools.RelBuilder$Frame.<init>(RelBuilder.java:1606)
	at org.apache.calcite.tools.RelBuilder.push(RelBuilder.java:220)
	at org.apache.calcite.tools.RelBuilder.setOp(RelBuilder.java:1032)
	at org.apache.calcite.tools.RelBuilder.union(RelBuilder.java:1052)
	at org.apache.calcite.tools.RelBuilder.union(RelBuilder.java:1042)
	at org.apache.calcite.test.RelBuilderTest.testUnion(RelBuilderTest.java:719)

Issue Links

• links to: PR #331