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From "Jesus Camacho Rodriguez (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-18065) Exception when pushing postaggregates into Druid
Date Tue, 14 Nov 2017 21:34:00 GMT
Jesus Camacho Rodriguez created HIVE-18065:
----------------------------------------------

             Summary: Exception when pushing postaggregates into Druid
                 Key: HIVE-18065
                 URL: https://issues.apache.org/jira/browse/HIVE-18065
             Project: Hive
          Issue Type: Bug
          Components: Druid integration
    Affects Versions: 3.0.0
            Reporter: Jesus Camacho Rodriguez
            Assignee: Jesus Camacho Rodriguez


After Calcite is upgraded to 1.14 and the rule to push post-aggregations to Druid is enabled,
the following query will fail:
{code}
EXPLAIN
SELECT language, robot, sum(added) - sum(delta) AS a
FROM druid_table_1
WHERE extract (week from `__time`) IN (10,11)
  AND robot='Bird Call'
GROUP BY language, robot;
{code}

The error we get is the following:
{code}
Cannot add expression of different type to set:
set type is RecordType(VARCHAR(2147483647) CHARACTER SET "UTF-16LE" COLLATE "ISO-8859-1$en_US$primary"
language, VARCHAR(2147483647) CHARACTER SET "UTF-16LE" COLLATE "ISO-8859-1$en_US$primary"
robot, DOUBLE a) NOT NULL
expression type is RecordType(VARCHAR(2147483647) CHARACTER SET "UTF-16LE" COLLATE "ISO-8859-1$en_US$primary"
language, DOUBLE postagg#0) NOT NULL
set is rel#1507:HiveProject.HIVE.[](input=HepRelVertex#1514,language=$0,robot=CAST(_UTF-16LE'Bird
Call'):VARCHAR(2147483647) CHARACTER SET "UTF-16LE" COLLATE "ISO-8859-1$en_US$primary",a=-($1,
$2))
expression is DruidQuery#1516
{code}



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