Function columnsToParquet

columnsToParquet(
    columns: Record<string, any[]>,
    floatColumns?: Set<string>,
    uintColumns?: ReadonlySet<string>,
): Promise<Uint8Array<ArrayBufferLike>>
Parameters
- columns: Record<string, any[]>
  column name to values, all arrays the same length
- OptionalfloatColumns: Set<string>
  names that must be Float64 even when every value in the sample happens to be a whole number - content inference alone would demote 3.0 to Int32, losing the schema and risking wrap beyond 2^31
- OptionaluintColumns: ReadonlySet<string>
  names whose domain is an UNSIGNED 32-bit integer. Inference reaches for Int32 on any whole number, which wraps a value at or above 2_147_483_648 to a negative one. An IFC express id is a u32 everywhere else in this codebase - Uint32Array in the parser's entity index and its transports, u32 in the Rust crates - so without this the export was the one place narrowing that domain.
Returns Promise<Uint8Array<ArrayBufferLike>>