[CALCITE-2010] Cannot plan query that is UNION ALL applied to VALUES

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.23.0
• Assignee: Unassigned
• Reporter: Julian Hyde
• Created: 12/Oct/17 22:16
• Updated: 24/May/20 12:00
• Resolved: 12/Apr/20 20:44

Description

Cannot plan query that is UNION ALL applied to VALUES. For example, in JdbcTest:

  @Test public void testUnionAllValues() {
    CalciteAssert.hr()
        .query("select x, y from (values (1, 2)) as t(x, y)\n"
            + "union all\n"
            + "select a + b, a - b from (values (3, 4), (5, 6)) as u(a, b)")
        .returnsUnordered();
  }

gives

java.sql.SQLException: Error while executing SQL "select x, y from (values (1, 2)) as t(x, y)
union all
select a + b, a - b from (values (3, 4), (5, 6)) as u(a, b)": Node [rel#26:Subset#4.ENUMERABLE.[]] could not be implemented; planner state:

Root: rel#26:Subset#4.ENUMERABLE.[]
Original rel:
LogicalUnion(subset=[rel#26:Subset#4.ENUMERABLE.[]], all=[true]): rowcount = 3.0, cumulative cost = {3.0 rows, 3.0 cpu, 0.0 io}, id = 21
  LogicalProject(subset=[rel#17:Subset#1.NONE.[]], X=[$0], Y=[$1]): rowcount = 1.0, cumulative cost = {1.0 rows, 2.0 cpu, 0.0 io}, id = 16
    LogicalValues(subset=[rel#15:Subset#0.NONE.[]], tuples=[[{ 1, 2 }]]): rowcount = 1.0, cumulative cost = {1.0 rows, 1.0 cpu, 0.0 io}, id = 1
  LogicalProject(subset=[rel#20:Subset#3.NONE.[0]], EXPR$0=[+($0, $1)], EXPR$1=[-($0, $1)]): rowcount = 2.0, cumulative cost = {2.0 rows, 4.0 cpu, 0.0 io}, id = 19
    LogicalValues(subset=[rel#18:Subset#2.NONE.[]], tuples=[[{ 3, 4 }, { 5, 6 }]]): rowcount = 2.0, cumulative cost = {2.0 rows, 1.0 cpu, 0.0 io}, id = 4

Issue Links

• relates to: CALCITE-2593 Sometimes fails to plan when a RelNode transform multiple collations to single collation