pub(crate) const LOCK_VERSION: u8 = 2;Expand description
Highest types.lock format this binary understands.
Version 2 records structured types; version 1 recorded a bare SQL type name
per column, which cannot express a record. A version 1 file still loads: its
type names parse as DataType::Named, and only the columns whose name was
a pseudo-type token are unreconstructible.