[teiid-issues] [JBoss JIRA] (TEIID-5396) Querying SQL Server variant type for a string fails

[Andrej Šmigala (JIRA)]

Andrej Šmigala created TEIID-5396:
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             Summary: Querying SQL Server variant type for a string fails
                 Key: TEIID-5396
                 URL: https://issues.jboss.org/browse/TEIID-5396
             Project: Teiid
          Issue Type: Bug
          Components: JDBC Connector
    Affects Versions: 8.12.14.6_4
            Reporter: Andrej Šmigala
            Assignee: Steven Hawkins
            Priority: Critical


Table on SQL Server source created as 
{code:sql}CREATE TABLE table_with_variant(id INT, var SQL_VARIANT){code}

and loaded with int, float and string data.

Running the following query against a dynamic VDB with metadata import
{code:sql}SELECT cast(var AS string) FROM table_with_variant WHERE id = 1{code}

fails with 
{noformat}java.sql.SQLException: Remote com.microsoft.sqlserver.jdbc.SQLServerException: The "variant" data type is not supported.{noformat}

This query used to work with DV 6.4.2, it appears it is a further regression from TEIID-5313 . Querying rows with non-string data works as expected.

SOURCE SRC command with 6.4.2 (working):
{code:sql}SELECT cast(g_0."var" AS varchar(4000)) FROM "dballo05"."dbo"."table_with_variant" g_0 WHERE g_0."id" = 1{code}

SOURCE SRC command with 6.4.3 (not working), note missing cast to varchar:
{code:sql}SELECT g_0."var" FROM "dballo06"."dbo"."table_with_variant" g_0 WHERE g_0."id" = 1{code}



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