%sHeterogeneous sequences are not allowed in ‘%ls’, found ‘%ls’ and ‘%ls’.

Error Message:
Msg 9311, Level 16, State 1, Line 7
%sHeterogeneous sequences are not allowed in ‘%ls’, found ‘%ls’ and ‘%ls’.

Severity level:

This error message appears when in an XQuery non-homogeneous sequences are found.

The T-SQL statement can be parsed, but causes the error at runtime.

Errors of the Severity level 16 are generated by the user and can be fixed by the SQL Server user. The statement cannot be run this way. Sequences must be homogeneous, that is of the same type.

This error message was introduced with SQL Server 2005.

DECLARE @xml xml;
SET @xml = ”;
    @xml.query(‘for $a in(1, 2, 3), $b in (“2″, 3)
        $a lt $b
    return sum($a + $b)’) as XML;

In the above example we try to string type and integer type in one sequence. This raises the error.


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