[CALCITE-1777] Druid adapter: "WHERE FALSE" causes AssertionError

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.13.0
• Assignee: Slim Bouguerra
• Reporter: Julian Hyde
• Created: 08/May/17 20:57
• Updated: 26/Jun/17 08:29
• Resolved: 09/May/17 01:50

Description

Query with "WHERE FALSE" gives AssertionError in Druid adapter.

Originally logged as part of CALCITE-1775. Test case in DruidAdapterIT:

  @Test public void testSelectCountFalse() {
    sql("select count(*) as c from \"foodmart\" where 1 < 0")
        .returnsUnordered("C=0");
  }

gives

java.lang.AssertionError: cannot translate filter: false

	at org.apache.calcite.adapter.druid.DruidQuery$Translator.translateFilter(DruidQuery.java:1067)
	at org.apache.calcite.adapter.druid.DruidQuery$Translator.access$000(DruidQuery.java:933)
	at org.apache.calcite.adapter.druid.DruidQuery.getQuery(DruidQuery.java:497)
	at org.apache.calcite.adapter.druid.DruidQuery.deriveQuerySpec(DruidQuery.java:470)
	at org.apache.calcite.adapter.druid.DruidQuery.getQuerySpec(DruidQuery.java:414)
	at org.apache.calcite.adapter.druid.DruidQuery.deriveRowType(DruidQuery.java:308)
	at org.apache.calcite.rel.AbstractRelNode.getRowType(AbstractRelNode.java:224)
	at org.apache.calcite.plan.volcano.VolcanoPlanner.register(VolcanoPlanner.java:857)
	at org.apache.calcite.plan.volcano.VolcanoPlanner.ensureRegistered(VolcanoPlanner.java:883)
	at org.apache.calcite.plan.volcano.VolcanoPlanner.ensureRegistered(VolcanoPlanner.java:1769)
	at org.apache.calcite.plan.volcano.VolcanoRuleCall.transformTo(VolcanoRuleCall.java:135)
	at org.apache.calcite.plan.RelOptRuleCall.transformTo(RelOptRuleCall.java:225)
	at org.apache.calcite.adapter.druid.DruidRules$DruidFilterRule.onMatch(DruidRules.java:228)
	at org.apache.calcite.plan.volcano.VolcanoRuleCall.onMatch(VolcanoRuleCall.java:211)