in src/table.jl [900:926]
function build(f::Meta.Field, L::Meta.Bool, batch, rb, de, nodeidx, bufferidx, convert)
@debugv 2 "building array: L = $L"
validity = buildbitmap(batch, rb, nodeidx, bufferidx)
bufferidx += 1
buffer = rb.buffers[bufferidx]
meta = buildmetadata(f.custom_metadata)
T = juliaeltype(f, nothing, false)
@debugv 2 "storage type for primitive: T = $T"
buffer = rb.buffers[bufferidx]
voff = batch.pos + buffer.offset
node = rb.nodes[nodeidx]
if rb.compression === nothing
decodedbytes = batch.bytes
pos = voff
else
ptr = pointer(batch.bytes, voff)
_, decodedbytes = uncompress(ptr, buffer, rb.compression)
pos = 1
end
len = rb.nodes[nodeidx].length
T = juliaeltype(f, meta, convert)
return BoolVector{T}(decodedbytes, pos, validity, len, meta), nodeidx + 1, bufferidx + 1
end