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Allow passing oracle arraysize to sqlalchemy when using sql_database source #3187

@jflipts

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@jflipts

Feature description

When using the sql_database source, I want to be able to pass the oracle arraysize to sql alchemy as documented here: https://docs.sqlalchemy.org/en/20/dialects/oracle.html#engine-options-consumed-by-the-sqlalchemy-oracledb-dialect-outside-of-the-driver

Sql alchemy then passes the setting to the underlying driver.

Being able to specify the arraysize is essential when extracting large tables since it can greatly reduce the number of round trips to the database.

Are you a dlt user?

Yes, I run dlt in production.

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