pub const MAX_STRUCT_DEPTH: u32 = 64;Expand description
Default safety limit for constructing a genuine nested Struct / List<Struct>
type once something is no longer being flattened into named columns -
independent of and unrelated to flatten_depth. Raised from the historical
12 to 64 so realistically-deep schemas type natively rather than collapsing
to Utf8; callers that need a different bound pass one explicitly via
build_arrow_schema_with_struct_depth.