Daniel Barclay (Drill/MapR) created DRILL-2239:
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Summary: Confusing error message "Column 't1' is ambiguous" for
_table_ name t1
Key: DRILL-2239
URL: https://issues.apache.org/jira/browse/DRILL-2239
Project: Apache Drill
Issue Type: Bug
Components: SQL Parser
Reporter: Daniel Barclay (Drill/MapR)
Assignee: Aman Sinha
Priority: Minor
The error message about the erroneous use of "t1" in "t1 IS NULL" in this query:
select *
from dfs_test.`xxx/jsoninput/nullable1U.json` t1
left outer join dfs_test.`xxx/jsoninput/nullable2U.json` t2
on ( t1.key = t2.key OR ( t1 IS NULL AND t2 IS NULL) )
says "Column 't1' is ambiguous" even though t1 is not a column name and isn't
ambiguous.
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