N Campbell created DRILL-5652:
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Summary: Drill pushed invalid SQL to SQL Server when concat
operator used
Key: DRILL-5652
URL: https://issues.apache.org/jira/browse/DRILL-5652
Project: Apache Drill
Issue Type: Bug
Components: Server
Affects Versions: 1.10.0
Environment: Drill 1.10
SQL Server 2016
Reporter: N Campbell
plugin to SQL Server 2016 via JDBC defined
following statement sent to Drill which fails due to invalid operator pushed
down in the SQL
select RNUM, '1234567890' || TVCHAR.CVCHAR from certsqlserver.dbo.TVCHAR
DATA_READ ERROR: The JDBC storage plugin failed while trying setup the SQL
query.
SELECT "RNUM", '1234567890' || "CVCHAR" AS "EXPR$1"
FROM "dbo"."TVCHAR"
Note also if two constants were used the expression pushed to SQL Server uses
blank strings instead of the specified non-blank value
SQL: select 'FF' || 'FF' from certsqlserver.dbo.TVERSION
SELECT '' || '' AS "EXPR$0"
FROM "dbo"."TVERSION"
https://docs.microsoft.com/en-us/sql/t-sql/language-elements/string-operators-transact-sql
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