Using Arrow Date32 format to transfer LocalDate across JVMs

[JaroslavTulach]

Pull Request Description

• Running Standard.Tableau in dual JVM mode #14607 reveals a problem when running

from Standard.Base import all
from Standard.Table import all
from Standard.Tableau import all

main =
    node1 = Data.read '/tmp/x.hyper'
    node2 = node1.read 'Extract'
    node3 = node2.set (expr 'year([Date])') "Year"
    node3.get "Year" . to_vector

in dual JVM (mock) mode:

sbt:enso> runEngineDistribution --vm.D=polyglot.enso.classLoading=Standard.Tableau:guest,hosted --run hyper.enso
Error:Argument_Mismatch Unsupported type: class com.oracle.truffle.polyglot.PolyglotMapAndFunction (expected date/time type).

• builds upon Arrow like storage over ByteBuffer to allow dual JVM buffer exchange #14309
• and upon Arrow-like variable size index for TextType off-heap storage #14471

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

• All code follows the
  Java,
• Unit tests have been written where possible.

[JaroslavTulach]

@jdunkerley, it would be more efficient if the DateBuilder was creating a specialized storage backed by ByteBuffer rather than converting LocalDate[] into the ByteBuffer when requested. We'd be allocating way less objects by doing so...

[enso-bot]

Jaroslav Tulach reports a new STANDUP for yesterday (2026-01-14):

Progress: .

• LocalDate storage fixed: Using Arrow Date32 format to transfer LocalDate across JVMs #14632
• master/slave hint: https://github.com/enso-org/enso/pull/14438/files#r2689017588
• fixing error messages in tests: 9842b26
• why is debugging in VSCode slow? Speeding up Truffle debugging apache/netbeans#9142
• meetings It should be finished by 2026-01-15.

GitHub

Replace language server WebSocket connection with Ydoc by 4e6 · Pull Request #14438 · enso-org/enso

Pull Request Description

close #14142

Important Notes

Checklist
Please ensure that the following checklist has been satisfied before submitting the PR:

The documentation has been updated, if ...