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Editorial Team
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Asked: 2026-05-27T09:40:18+00:00

I’ve setup a linked MySQL server on our Microsoft SQL Server. I can run

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I’ve setup a linked MySQL server on our Microsoft SQL Server. I can run this query successfully in MSSQL Management Studio…

SELECT * FROM OPENQUERY(MYSQL, 'SELECT * FROM countries')

When I run this from a website in PHP though, I get this error…

Message: Failed to query SQL statement. Reason: Heterogeneous queries require the ANSI_NULLS and ANSI_WARNINGS options to be set for the connection. This ensures consistent query semantics. Enable these options and then reissue your query.

Any ideas what I can do to get this to work?

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1 Answer

  1. Editorial Team

    the workaround is to shift the “SET ANSI_WARNINGS OFF” statement just below the linked server call. And to be on the safer side apply the “SET ANSI_WARNINGS ON” statement at the end of the sp/query.

    update

    SET ANSI_WARNINGS ON

SET ANSI_NULLS ON

SELECT * FROM OPENQUERY(MYSQL, 'SELECT * FROM countries')

    http://social.msdn.microsoft.com/Forums/en-US/sqldataaccess/thread/1d501b57-fc58-4fbe-9bec-6c38ad158a62

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