Constant hdbconnect::DEFAULT_LOB_READ_LENGTH

pub const DEFAULT_LOB_READ_LENGTH: u32 = 16_000_000;

Number of bytes (for BLOBS and CLOBS) or 1-2-3-byte sequences (for NCLOBS) that are fetched in a single LOB READ roundtrip; the constant's value is 16,000,000.

The value used at runtime can be changed with Connection::set_lob_read_length().