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doctrine-dbal
Commit 0572953b authored by Benjamin Eberlei's avatar Benjamin Eberlei
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Add note on MSSQL and Unique + NULL Constraints

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reference/en/known-vendor-issues.txt
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...@@ -100,4 +100,7 @@ using strings instead of the `OCI-LOB` does not cause any problems. ...@@ -100,4 +100,7 @@ using strings instead of the `OCI-LOB` does not cause any problems.
++ Microsoft SQL Server ++ Microsoft SQL Server
Nothing yet. +++ Unique and NULL
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Microsoft SQL Server takes Unique very seriously. There is only ever one NULL allowed contrary to the standard
where you can have multiple NULLs in a unique column.
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