Not yet:

"By default a reference to a new hash is returned for each row. It is likely that a future version of the DBI will support an attribute which will enable the same hash to be reused for each row. This will give a significant performance boost, but it won't be enabled by default because of the risk of breaking old code."

Please take a look at the DBI documentation

In reply to Re^2: Nesting prepared DBI handles by WizardOfUz
in thread Nesting prepared DBI handles by MattLG

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