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1723d7d59f
Fixed regression in Oracle dialect that was inadvertently using max identifier length of 128 characters on Oracle server 12.2 and greater even though the stated contract for the remainder of the 1.3 series is that this value stays at 30 until version SQLAlchemy 1.4. Also repaired issues with the retrieval of the "compatibility" version, and removed the warning emitted when the "v$parameter" view was not accessible as this was causing user confusion. Fixes: #4898 Change-Id: Ieb7b3e093610896c5aa12d0789b63262e0ecf9d8