Oracle Data Source Limitations

This section describes limitations of Oracle data sources that use an OCI or thin driver.

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In a MERGE statement, you cannot modify columns that are also in the ON clause. For example, the column vendor_name cannot be updated:

MERGE INTO output_table USING vendor_list ON vendor_name = Widgets

UPDDATE SET vendor_name = V9187

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TDV never pushes a MERGE statement with a DELETE branch, because Oracle’s behavior is not ANSI-compliant. (Oracle can only delete a row if the row is first updated and then meets certain conditions.)

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To see what JDBC drivers support various versions of Oracle databases, search the Oracle web site.

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Inconsistent capitalization of projection names in query text can result in an Oracle Invalid Identifier error.

Note: Oracle supports all ANSI-supported joins including LEFT OUTER JOIN and RIGHT OUTER JOIN.

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