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https://issues.apache.org/jira/browse/HIVE-18065?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jesus Camacho Rodriguez reassigned HIVE-18065:
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> 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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