Why Does My SSIS Package Fail When Retrieving Metadata from Temporary Tables?

Metadata Retrieval Failure in SSIS Package Due to Temporary Table

In SSIS, retrieving metadata from temporary tables can occasionally cause the package to fail with the error: "Unspecified error. An OLE DB record is available. The metadata could not be determined because statement 'select * from '##TmpMcsConfigurationDeviceHistory86B34BFD041A430E84CCACE78DA336A1'' uses a temp table."

This issue arises when the package attempts to access a global temporary table named "##TmpMcsConfigurationDeviceHistory." The error indicates that SSIS is unable to determine the metadata of the temp table dynamically.

Resolution

To resolve this issue, you can explicitly define the metadata for the temp table using the WITH RESULT SETS clause. This provides SSIS with the necessary information upfront, eliminating the need for it to dynamically determine the metadata, which can lead to failures for temp tables.

Sample Query with WITH RESULT SETS:

EXEC ('
    CREATE TABLE #a 
      (
        MyIntegerColumn INT NOT NULL,
        MyTextColumn VARCHAR(50) NULL,
        MyOtherColumn BIT NULL
      ) 
    INSERT INTO #a 
      (
        MyIntegerColumn,
        MyTextColumn,
        MyOtherColumn
      )
    SELECT 
        1 AS MyIntegerColumn,
        ''x'' AS MyTextColumn,
        0 AS MyOtherColumn

    SELECT MyIntegerColumn, MyTextColumn, MyOtherColumn
    FROM #a')

WITH RESULT SETS
    (
        (
            MyIntegerColumn INT NOT NULL
           ,MyTextColumn VARCHAR(50) NULL
           ,MyOtherColumn BIT NULL
        )
    )

By providing the metadata explicitly, SSIS can avoid retrieving it dynamically from the temp table, eliminating the error and enabling the package to fetch the metadata successfully.

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