Storage
An SQLite storage (NULL, INTEGER, REAL, TEXT, BLOB).
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The NULL storage class.
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The INTEGER storage class, wrapping an Int64.
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The REAL storage class, wrapping a Double.
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The TEXT storage class, wrapping a String.
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The BLOB storage class, wrapping Data.
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Returns Int64, Double, String, Data or nil.
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Return true if the storages are identical.
Unlike DatabaseValue equality that considers the integer 1 to be equal to the 1.0 double (as SQLite does), int64 and double storages are never equal.