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3 Commits

Author SHA1 Message Date
Paul Trowbridge
a9ca58a845 Fix forecast data load and add byte-progress UI 
pg now returns bigint/numeric as JS numbers so Arrow infers Int/Float64
instead of Dictionary<Utf8>. /data accumulates rows and emits a single
record batch to avoid dictionary REPLACEMENT messages that crash
Perspective's WASM reader. Forecast view streams the response body and
shows received/total bytes while loading. Drops stale public/ static
middleware that was shadowing the React build at /.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
 2026-04-28 19:51:39 -04:00
Paul Trowbridge
a6e6efd36e Switch /data endpoint to Arrow IPC stream with pg cursor batching 
Server streams rows from a pg cursor in 10k-row batches, building Arrow
record batches incrementally and piping them as chunked HTTP response —
Node.js heap stays bounded regardless of dataset size.

Client fetches as arrayBuffer() and loads directly into Perspective worker
(native Arrow path, no JSON deserialization). X-Row-Count header drives
a non-blocking banner for datasets >= 500k rows. validCols now derived
from col_meta rather than from row keys.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-04-27 22:57:47 -04:00
Paul Trowbridge
08dc415bfd Initial commit — pivot forecast application 
Node.js/Express + PostgreSQL forecasting app with AG Grid Enterprise pivot UI.
Supports baseline, scale, recode, clone operations on configurable source tables.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-04-01 07:59:05 -04:00