[jira] [Created] (CALCITE-2226) Substring operator converter doesn't handle non-constant literals

[slim bouguerra (JIRA)]

slim bouguerra created CALCITE-2226:
---------------------------------------

             Summary: Substring operator converter doesn't handle non-constant 
literals 
                 Key: CALCITE-2226
                 URL: https://issues.apache.org/jira/browse/CALCITE-2226
             Project: Calcite
          Issue Type: Bug
          Components: druid
    Affects Versions: 1.16.0
            Reporter: slim bouguerra
            Assignee: slim bouguerra
             Fix For: 1.17.0


Query like the following 
{code}
SELECT substring(namespace, CAST(deleted AS INT), 4)
FROM druid_table;
{code}
will fail with 
{code}
java.lang.AssertionError: not a literal: $13
        at org.apache.calcite.rex.RexLiteral.findValue(RexLiteral.java:963)
        at org.apache.calcite.rex.RexLiteral.findValue(RexLiteral.java:955)
        at org.apache.calcite.rex.RexLiteral.intValue(RexLiteral.java:938)
        at 
org.apache.calcite.adapter.druid.SubstringOperatorConversion.toDruidExpression(SubstringOperatorConversion.java:46)
        at 
org.apache.calcite.adapter.druid.DruidExpressions.toDruidExpression(DruidExpressions.java:120)
        at 
org.apache.calcite.adapter.druid.DruidQuery.computeProjectAsScan(DruidQuery.java:746)
        at 
org.apache.calcite.adapter.druid.DruidRules$DruidProjectRule.onMatch(DruidRules.java:308)
        at 
org.apache.calcite.plan.AbstractRelOptPlanner.fireRule(AbstractRelOptPlanner.java:317)
{code}

Druid Substring converter is assuming that index is always a constant literal, 
which is wrong.  



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