From 1ed8595577d523989f0e88c20de97107b46ae12c Mon Sep 17 00:00:00 2001 From: Paul Trowbridge Date: Mon, 17 Aug 2026 21:48:06 -0400 Subject: [PATCH] SPIKE: server-side DuckDB virtual server behind ?engine=duck MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Working measurement spike for Option C: aggregation runs in a server-side DuckDB instead of shipping every row to the browser. Opt-in via ?engine=duck; the default client-side WASM path is untouched. - routes/perspective.js: POST /perspective/init materializes a version's forecast table into a persistent in-process DuckDB (ATTACH postgres, so 535k rows land in ~1.5s without streaming through Node); POST /perspective/sql executes one Perspective-generated statement, with Arrow IPC output for viewport reads. - ui/src/duckServerHandler.js: VirtualServerHandler that delegates SQL generation to Perspective's own GenericSQLVirtualServerModel and POSTs the result to the server. Adapted from @perspective-dev/client's virtual_servers/duckdb.ts — same SQL model, different transport. - Forecast.jsx: DUCK_MODE branch replaces the heavy /data fetch with /perspective/init, opens the hosted table over a message port, and shows a latency overlay. applyDepth routes through viewer.restore() since the SQL server cannot handle view.set_depth(). Preserved for a future faster-load effort. Findings and the reason this is not the shipped path (no interactive tree expand/collapse) are in pf_perspective_options.md on master. Co-Authored-By: Claude Opus 5 --- package-lock.json | 1333 ++++++++++++++++++++++++++++++++++- package.json | 1 + routes/perspective.js | 105 +++ server.js | 1 + ui/src/duckServerHandler.js | 154 ++++ ui/src/views/Forecast.jsx | 96 ++- 6 files changed, 1668 insertions(+), 22 deletions(-) create mode 100644 routes/perspective.js create mode 100644 ui/src/duckServerHandler.js diff --git a/package-lock.json b/package-lock.json index e85dee9..f0f002c 100644 --- a/package-lock.json +++ b/package-lock.json @@ -7,10 +7,12 @@ "": { "name": "pf_app", "version": "1.0.0", + "license": "MIT", "dependencies": { "apache-arrow": "^21.1.0", "cors": "^2.8.5", "dotenv": "^16.0.0", + "duckdb": "^1.4.4", "express": "^4.18.2", "pg": "^8.11.3" }, @@ -18,6 +20,81 @@ "nodemon": "^3.0.0" } }, + "node_modules/@gar/promisify": { + "version": "1.1.3", + "resolved": "https://registry.npmjs.org/@gar/promisify/-/promisify-1.1.3.tgz", + "integrity": 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Please update. Support for old versions may be purchased (at exorbitant rates) by contacting i@izs.me", + "license": "ISC", + "dependencies": { + "chownr": "^2.0.0", + "fs-minipass": "^2.0.0", + "minipass": "^5.0.0", + "minizlib": "^2.1.1", + "mkdirp": "^1.0.3", + "yallist": "^4.0.0" + }, + "engines": { + "node": ">=10" + } + }, + "node_modules/cacache/node_modules/tar/node_modules/minipass": { + "version": "5.0.0", + "resolved": "https://registry.npmjs.org/minipass/-/minipass-5.0.0.tgz", + "integrity": "sha512-3FnjYuehv9k6ovOEbyOswadCDPX1piCfhV8ncmYtHOjuPwylVWsghTLo7rabjC3Rx5xD4HDx8Wm1xnMF7S5qFQ==", + "license": "ISC", + "engines": { + "node": ">=8" + } + }, "node_modules/call-bind-apply-helpers": { "version": "1.0.2", "resolved": "https://registry.npmjs.org/call-bind-apply-helpers/-/call-bind-apply-helpers-1.0.2.tgz", @@ -313,6 +574,24 @@ "fsevents": "~2.3.2" } }, + "node_modules/chownr": { + "version": "2.0.0", + "resolved": "https://registry.npmjs.org/chownr/-/chownr-2.0.0.tgz", + "integrity": 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"MIT", + "dependencies": { + "ms": "^2.1.3" + }, + "engines": { + "node": ">=6.0" + }, + "peerDependenciesMeta": { + "supports-color": { + "optional": true + } + } + }, + "node_modules/socks-proxy-agent/node_modules/ms": { + "version": "2.1.3", + "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz", + "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA==", + "license": "MIT" + }, "node_modules/split2": { "version": "4.2.0", "resolved": "https://registry.npmjs.org/split2/-/split2-4.2.0.tgz", @@ -1497,6 +2638,18 @@ "node": ">= 10.x" } }, + "node_modules/ssri": { + "version": "9.0.1", + "resolved": "https://registry.npmjs.org/ssri/-/ssri-9.0.1.tgz", + "integrity": "sha512-o57Wcn66jMQvfHG1FlYbWeZWW/dHZhJXjpIcTfXldXEk5nz5lStPo3mK0OJQfGR3RbZUlbISexbljkJzuEj/8Q==", + "license": "ISC", + "dependencies": { + "minipass": "^3.1.1" + }, + "engines": { + "node": "^12.13.0 || ^14.15.0 || >=16.0.0" + } + }, "node_modules/statuses": { "version": "2.0.2", "resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.2.tgz", @@ -1506,6 +2659,41 @@ "node": ">= 0.8" } }, + "node_modules/string_decoder": { + "version": "1.3.0", + "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz", + "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==", + "license": "MIT", + "dependencies": { + "safe-buffer": "~5.2.0" + } + }, + "node_modules/string-width": { + "version": "4.2.3", + "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz", + "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==", + "license": "MIT", + "dependencies": { + "emoji-regex": "^8.0.0", + "is-fullwidth-code-point": "^3.0.0", + "strip-ansi": "^6.0.1" + }, + "engines": { + "node": ">=8" + } + }, + "node_modules/strip-ansi": { + "version": "6.0.1", + "resolved": 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"https://registry.npmjs.org/chownr/-/chownr-3.0.0.tgz", + "integrity": "sha512-+IxzY9BZOQd/XuYPRmrvEVjF/nqj5kgT4kEq7VofrDoM1MxoRjEWkrCC3EtLi59TVawxTAn+orJwFQcrqEN1+g==", + "license": "BlueOak-1.0.0", + "engines": { + "node": ">=18" + } + }, + "node_modules/tar/node_modules/minipass": { + "version": "7.1.3", + "resolved": "https://registry.npmjs.org/minipass/-/minipass-7.1.3.tgz", + "integrity": "sha512-tEBHqDnIoM/1rXME1zgka9g6Q2lcoCkxHLuc7ODJ5BxbP5d4c2Z5cGgtXAku59200Cx7diuHTOYfSBD8n6mm8A==", + "license": "BlueOak-1.0.0", + "engines": { + "node": ">=16 || 14 >=14.17" + } + }, + "node_modules/tar/node_modules/minizlib": { + "version": "3.1.0", + "resolved": "https://registry.npmjs.org/minizlib/-/minizlib-3.1.0.tgz", + "integrity": "sha512-KZxYo1BUkWD2TVFLr0MQoM8vUUigWD3LlD83a/75BqC+4qE0Hb1Vo5v1FgcfaNXvfXzr+5EhQ6ing/CaBijTlw==", + "license": "MIT", + "dependencies": { + "minipass": "^7.1.2" + }, + "engines": { + "node": ">= 18" + } + }, + "node_modules/tar/node_modules/yallist": { + "version": "5.0.0", + "resolved": "https://registry.npmjs.org/yallist/-/yallist-5.0.0.tgz", + "integrity": "sha512-YgvUTfwqyc7UXVMrB+SImsVYSmTS8X/tSrtdNZMImM+n7+QTriRXyXim0mBrTXNeqzVF0KWGgHPeiyViFFrNDw==", + "license": "BlueOak-1.0.0", + "engines": { + "node": ">=18" + } + }, "node_modules/to-regex-range": { "version": "5.0.1", "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz", @@ -1564,6 +2807,12 @@ "nodetouch": "bin/nodetouch.js" } }, + "node_modules/tr46": { + "version": "0.0.3", + "resolved": "https://registry.npmjs.org/tr46/-/tr46-0.0.3.tgz", + "integrity": "sha512-N3WMsuqV66lT30CrXNbEjx4GEwlow3v6rr4mCcv6prnfwhS01rkgyFdjPNBYd9br7LpXV1+Emh01fHnq2Gdgrw==", + "license": "MIT" + }, "node_modules/tslib": { "version": "2.8.1", "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz", @@ -1605,6 +2854,30 @@ "integrity": "sha512-Zz+aZWSj8LE6zoxD+xrjh4VfkIG8Ya6LvYkZqtUQGJPZjYl53ypCaUwWqo7eI0x66KBGeRo+mlBEkMSeSZ38Nw==", "license": "MIT" }, + "node_modules/unique-filename": { + "version": "2.0.1", + "resolved": "https://registry.npmjs.org/unique-filename/-/unique-filename-2.0.1.tgz", + "integrity": "sha512-ODWHtkkdx3IAR+veKxFV+VBkUMcN+FaqzUUd7IZzt+0zhDZFPFxhlqwPF3YQvMHx1TD0tdgYl+kuPnJ8E6ql7A==", + "license": "ISC", + "dependencies": { + "unique-slug": "^3.0.0" + }, + "engines": { + "node": "^12.13.0 || ^14.15.0 || >=16.0.0" + } + }, + "node_modules/unique-slug": { + "version": "3.0.0", + "resolved": "https://registry.npmjs.org/unique-slug/-/unique-slug-3.0.0.tgz", + "integrity": "sha512-8EyMynh679x/0gqE9fT9oilG+qEt+ibFyqjuVTsZn1+CMxH+XLlpvr2UZx4nVcCwTpx81nICr2JQFkM+HPLq4w==", + "license": "ISC", + "dependencies": { + "imurmurhash": "^0.1.4" + }, + "engines": { + "node": "^12.13.0 || ^14.15.0 || >=16.0.0" + } + }, "node_modules/unpipe": { "version": "1.0.0", "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz", @@ -1614,6 +2887,12 @@ "node": ">= 0.8" } }, + "node_modules/util-deprecate": { + "version": "1.0.2", + "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz", + "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==", + "license": "MIT" + }, "node_modules/utils-merge": { "version": "1.0.1", "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz", @@ -1632,6 +2911,46 @@ "node": ">= 0.8" } }, + "node_modules/webidl-conversions": { + "version": "3.0.1", + "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz", + "integrity": "sha512-2JAn3z8AR6rjK8Sm8orRC0h/bcl/DqL7tRPdGZ4I1CjdF+EaMLmYxBHyXuKL849eucPFhvBoxMsflfOb8kxaeQ==", + "license": "BSD-2-Clause" + }, + "node_modules/whatwg-url": { + "version": "5.0.0", + "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz", + "integrity": "sha512-saE57nupxk6v3HY35+jzBwYa0rKSy0XR8JSxZPwgLr7ys0IBzhGviA1/TUGJLmSVqs8pb9AnvICXEuOHLprYTw==", + "license": "MIT", + "dependencies": { + "tr46": "~0.0.3", + "webidl-conversions": "^3.0.0" + } + }, + "node_modules/which": { + "version": "2.0.2", + "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz", + "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==", + "license": "ISC", + "dependencies": { + "isexe": "^2.0.0" + }, + "bin": { + "node-which": "bin/node-which" + }, + "engines": { + "node": ">= 8" + } + }, + "node_modules/wide-align": { + "version": "1.1.5", + "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.5.tgz", + "integrity": "sha512-eDMORYaPNZ4sQIuuYPDHdQvf4gyCF9rEEV/yPxGfwPkRodwEgiMUUXTx/dex+Me0wxx53S+NgUHaP7y3MGlDmg==", + "license": "ISC", + "dependencies": { + "string-width": "^1.0.2 || 2 || 3 || 4" + } + }, "node_modules/wordwrapjs": { "version": "5.1.1", "resolved": "https://registry.npmjs.org/wordwrapjs/-/wordwrapjs-5.1.1.tgz", @@ -1641,6 +2960,12 @@ "node": ">=12.17" } }, + "node_modules/wrappy": { + "version": "1.0.2", + "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz", + "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==", + "license": "ISC" + }, "node_modules/xtend": { "version": "4.0.2", "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz", @@ -1649,6 +2974,12 @@ "engines": { "node": ">=0.4" } + }, + "node_modules/yallist": { + "version": "4.0.0", + "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz", + "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==", + "license": "ISC" } } } diff --git a/package.json b/package.json index e4583d9..f567c9d 100644 --- a/package.json +++ b/package.json @@ -13,6 +13,7 @@ "apache-arrow": "^21.1.0", "cors": "^2.8.5", "dotenv": "^16.0.0", + "duckdb": "^1.4.4", "express": "^4.18.2", "pg": "^8.11.3" }, diff --git a/routes/perspective.js b/routes/perspective.js new file mode 100644 index 0000000..5ce34b1 --- /dev/null +++ b/routes/perspective.js @@ -0,0 +1,105 @@ +// SPIKE (Option C): server-side DuckDB virtual-server backend for Perspective. +// +// The browser runs Perspective's VirtualServer + GenericSQLVirtualServerModel +// (WASM) which turns each pivot interaction into a SQL string. That SQL is +// POSTed here and run against a persistent in-process DuckDB that has the +// forecast table materialized from Postgres. Only the generated SQL and the +// aggregated (viewport-sized) Arrow result cross the wire — never all rows. +// +// This is a measurement spike, not production wiring: one global DuckDB +// connection, materialize-once per version (stale after writes until /init +// refresh). See pf_perspective_options.md option C. + +const express = require('express'); + +let duckdb = null; +try { duckdb = require('duckdb'); } catch { /* optional dep */ } + +module.exports = function(pool) { + const router = express.Router(); + + let dbPromise = null; // resolves to { db, conn } + const materialized = new Map(); // versionId -> { duckName, rows, ms } + + function getDb() { + if (dbPromise) return dbPromise; + dbPromise = new Promise((resolve, reject) => { + const db = new duckdb.Database(':memory:'); + const conn = db.connect(); + const PG = `host=${process.env.DB_HOST} port=${process.env.DB_PORT} ` + + `dbname=${process.env.DB_NAME} user=${process.env.DB_USER} password=${process.env.DB_PASSWORD}`; + conn.exec( + `INSTALL postgres; LOAD postgres; ` + + `INSTALL arrow FROM community; LOAD arrow; ` + + `ATTACH '${PG}' AS pg (TYPE postgres, READ_ONLY);`, + (err) => err ? reject(err) : resolve({ db, conn }) + ); + }); + return dbPromise; + } + + const allP = (conn, sql) => new Promise((res, rej) => conn.all(sql, (e, r) => e ? rej(e) : res(r))); + const execP = (conn, sql) => new Promise((res, rej) => conn.exec(sql, (e) => e ? rej(e) : res())); + const arrowP = (conn, sql) => new Promise((res, rej) => conn.arrowIPCAll(sql, (e, r) => e ? rej(e) : res(r))); + + // bigint-safe JSON for the small metadata queries (schema/size/min-max) + const sendJson = (res, rows) => + res.type('json').send(JSON.stringify(rows, (k, v) => typeof v === 'bigint' ? Number(v) : v)); + + async function materialize(conn, versionId, refresh) { + if (materialized.has(versionId) && !refresh) return materialized.get(versionId); + const v = await pool.query( + `SELECT s.tname FROM pf.version v JOIN pf.source s ON s.id = v.source_id WHERE v.id = $1`, + [versionId] + ); + if (!v.rows.length) throw new Error(`version ${versionId} not found`); + const tname = v.rows[0].tname; + const fcTable = `fc_${tname}_${versionId}`; + const duckName = `fc_${versionId}`; + const t0 = Date.now(); + if (refresh) await execP(conn, `DROP TABLE IF EXISTS "${duckName}";`); + await execP(conn, `CREATE TABLE IF NOT EXISTS "${duckName}" AS SELECT * FROM pg."pf"."${fcTable}";`); + const cnt = await allP(conn, `SELECT count(*) AS c FROM "${duckName}";`); + const info = { duckName, rows: Number(cnt[0].c), ms: Date.now() - t0 }; + materialized.set(versionId, info); + return info; + } + + // Materialize a version's forecast table into DuckDB and report the hosted id. + router.post('/perspective/init', async (req, res) => { + if (!duckdb) return res.status(501).json({ error: 'duckdb node binding not installed' }); + try { + const versionId = parseInt(req.body.versionId); + if (!versionId) return res.status(400).json({ error: 'versionId required' }); + const { conn } = await getDb(); + const info = await materialize(conn, versionId, !!req.body.refresh); + res.json({ tableId: `memory.${info.duckName}`, rows: info.rows, materialize_ms: info.ms }); + } catch (err) { + console.error('[perspective/init]', err.message); + res.status(500).json({ error: err.message }); + } + }); + + // Execute one Perspective-generated SQL statement. arrow=true → Arrow IPC bytes. + router.post('/perspective/sql', async (req, res) => { + if (!duckdb) return res.status(501).json({ error: 'duckdb node binding not installed' }); + const { sql, arrow } = req.body || {}; + if (!sql) return res.status(400).json({ error: 'sql required' }); + try { + const { conn } = await getDb(); + if (process.env.PSP_DEBUG_SQL) console.log(`[psp sql${arrow ? ' arrow' : ''}]`, String(sql).replace(/\s+/g, ' ').slice(0, 220)); + if (arrow) { + const bufs = await arrowP(conn, sql); + const out = Buffer.concat(bufs, bufs.reduce((a, b) => a + b.length, 0)); + res.type('application/octet-stream').send(out); + } else { + sendJson(res, await allP(conn, sql)); + } + } catch (err) { + console.error('[perspective/sql]', err.message, '\n SQL:', String(sql).slice(0, 300)); + res.status(500).json({ error: err.message }); + } + }); + + return router; +}; diff --git a/server.js b/server.js index f6776d5..dbd51e9 100644 --- a/server.js +++ b/server.js @@ -31,6 +31,7 @@ app.use('/api', require('./routes/sources')(pool)); app.use('/api', require('./routes/versions')(pool)); app.use('/api', require('./routes/operations')(pool)); app.use('/api', require('./routes/log')(pool)); +app.use('/api', require('./routes/perspective')(pool)); // SPIKE: server-side DuckDB virtual server const port = process.env.PORT || 3010; diff --git a/ui/src/duckServerHandler.js b/ui/src/duckServerHandler.js new file mode 100644 index 0000000..9b49771 --- /dev/null +++ b/ui/src/duckServerHandler.js @@ -0,0 +1,154 @@ +// SPIKE (Option C): a Perspective VirtualServerHandler that runs in the browser +// but executes its generated SQL on a SERVER-SIDE DuckDB (routes/perspective.js). +// +// Perspective's GenericSQLVirtualServerModel (WASM) turns each view interaction +// into a SQL string; we POST that SQL to /api/perspective/sql and feed the +// result back. Metadata queries come back as JSON; viewGetData comes back as +// Arrow IPC and is handed straight to the data slice. Only generated SQL and +// the aggregated viewport cross the wire. +// +// Adapted from @perspective-dev/client/src/ts/virtual_servers/duckdb.ts +// (which targets in-browser duckdb-wasm). Same SQL model, different transport. + +const NUMBER_AGGS = [ + 'sum', 'count', 'any_value', 'arbitrary', 'array_agg', 'avg', 'bit_and', + 'bit_or', 'bit_xor', 'bitstring_agg', 'bool_and', 'bool_or', 'countif', + 'favg', 'fsum', 'geomean', 'kahan_sum', 'last', 'max', 'min', 'product', + 'string_agg', 'sumkahan', +] +const STRING_AGGS = [ + 'count', 'any_value', 'arbitrary', 'first', 'countif', 'last', 'string_agg', +] +const FILTER_OPS = [ + '==', '!=', 'LIKE', 'IS DISTINCT FROM', 'IS NOT DISTINCT FROM', + '>=', '<=', '>', '<', +] + +function duckdbTypeToPsp(name) { + name = String(name).toLowerCase() + if (name === 'varchar' || name === 'utf8') return 'string' + if (name === 'double' || name === 'bigint' || name === 'hugeint' || + name === 'float64' || name.startsWith('decimal')) return 'float' + if (name.startsWith('int')) return 'integer' + if (name.startsWith('date')) return 'date' + if (name.startsWith('bool')) return 'boolean' + if (name.startsWith('timestamp')) return 'datetime' + if (name.startsWith('json') || name.startsWith('struct')) return 'string' + console.warn(`[duck-server] unknown type '${name}'`) + return 'string' +} + +// Build a VirtualServerHandler bound to the given perspective module (for the +// SQL generator) and server SQL endpoint. onTiming(ms, bytes) is called for +// every viewGetData round trip so the UI can show interaction latency. +export function makeDuckServerHandler(mod, { sqlUrl = '/api/perspective/sql', onTiming } = {}) { + let sqlBuilder = null + // The SQL generator must come from an INITIALIZED perspective wasm module. + // The element's static __wasm_module__ is initialized + // once the element is registered; the bare client default export is not, so + // `new perspective.GenericSQLVirtualServerModel()` throws on its wasm glue. + // Mirror @perspective-dev's reference DuckDBHandler and resolve from the viewer. + function wasmModule() { + const viewerClass = typeof customElements !== 'undefined' + && customElements.get('perspective-viewer') + if (viewerClass && viewerClass.__wasm_module__) return viewerClass.__wasm_module__ + return mod + } + const builder = () => (sqlBuilder ||= new (wasmModule().GenericSQLVirtualServerModel)()) + + async function postSql(sql, wantArrow) { + const r = await fetch(sqlUrl, { + method: 'POST', + headers: { 'Content-Type': 'application/json' }, + body: JSON.stringify({ sql, arrow: !!wantArrow }), + }) + if (!r.ok) { + let msg = r.statusText + try { msg = (await r.json()).error } catch {} + throw new Error(`[duck-server] ${msg}`) + } + return wantArrow ? new Uint8Array(await r.arrayBuffer()) : r.json() + } + + return { + getFeatures() { + return { + group_by: true, + split_by: true, + sort: true, + expressions: true, + group_rollup_mode: ['rollup', 'flat', 'total'], + filter_ops: { + integer: FILTER_OPS, float: FILTER_OPS, string: FILTER_OPS, + boolean: FILTER_OPS, date: FILTER_OPS, datetime: FILTER_OPS, + }, + aggregates: { + integer: NUMBER_AGGS, float: NUMBER_AGGS, string: STRING_AGGS, + boolean: STRING_AGGS, date: STRING_AGGS, datetime: STRING_AGGS, + }, + } + }, + + async getHostedTables() { + const rows = await postSql(builder().getHostedTables()) + return rows.map(r => `${r.database || 'memory'}.${r.name}`) + }, + + async tableSchema(tableId) { + const rows = await postSql(builder().tableSchema(tableId)) + const schema = {} + for (const r of rows) { + if (!String(r.column_name).startsWith('__')) { + schema[r.column_name] = duckdbTypeToPsp(r.column_type) + } + } + return schema + }, + + async tableSize(tableId) { + const rows = await postSql(builder().tableSize(tableId)) + return Number(rows[0]['count_star()']) + }, + + async tableMakeView(tableId, viewId, config) { + await postSql(builder().tableMakeView(tableId, viewId, config)) + }, + + async tableValidateExpression(tableId, expression) { + const rows = await postSql(builder().tableValidateExpression(tableId, expression)) + return duckdbTypeToPsp(rows[0].column_type) + }, + + async viewColumnSize(viewId, config) { + const rows = await postSql(builder().viewColumnSize(viewId)) + const count = Number(Object.values(rows[0])[0]) + const gs = config?.group_by?.length || 0 + const isFlat = config?.group_rollup_mode === 'flat' + return count - (gs === 0 ? 0 : isFlat ? gs : gs + 1) + }, + + async viewSize(viewId) { + const rows = await postSql(builder().viewSize(viewId)) + return Number(Object.values(rows[0])[0]) + }, + + async viewDelete(viewId) { + await postSql(builder().viewDelete(viewId)) + }, + + async viewGetMinMax(viewId, columnName, config) { + const rows = await postSql(builder().viewGetMinMax(viewId, columnName, config)) + let [min, max] = Object.values(rows[0]) + if (typeof min === 'bigint') min = Number(min) + if (typeof max === 'bigint') max = Number(max) + return { min: min ?? null, max: max ?? null } + }, + + async viewGetData(viewId, config, schema, viewport, dataSlice) { + const t0 = performance.now() + const ipc = await postSql(builder().viewGetData(viewId, config, viewport, schema), true) + onTiming?.(performance.now() - t0, ipc.length) + dataSlice.fromArrowIpc(ipc) + }, + } +} diff --git a/ui/src/views/Forecast.jsx b/ui/src/views/Forecast.jsx index b83e459..ed4ff91 100644 --- a/ui/src/views/Forecast.jsx +++ b/ui/src/views/Forecast.jsx @@ -1,9 +1,13 @@ import { useState, useEffect, useRef } from 'react' import useTheme from '../theme.jsx' +import { makeDuckServerHandler } from '../duckServerHandler.js' const LAYOUT_KEY = (vid) => `pf_layout_v${vid}` // last-used layout (auto restore) const LAYOUTS_KEY = (vid) => `pf_layouts_v${vid}` // named layout list +// SPIKE: opt-in server-side DuckDB engine via ?engine=duck (see pf_perspective_options.md, option C) +const DUCK_MODE = new URLSearchParams(window.location.search).get('engine') === 'duck' + let perspectivePromise = null function loadPerspective() { if (perspectivePromise) return perspectivePromise @@ -35,6 +39,7 @@ export default function Forecast({ sources = [], sourceId, versionId, refreshSou const [largeDataset, setLargeDataset] = useState(false) const [loadProgress, setLoadProgress] = useState(null) // { received, total } const [msg, setMsg] = useState(null) + const [duckStats, setDuckStats] = useState(null) // SPIKE: { rows, materializeMs, lastMs, lastBytes, queries } // layouts const [layouts, setLayouts] = useState([]) @@ -69,6 +74,7 @@ export default function Forecast({ sources = [], sourceId, versionId, refreshSou const viewerRef = useRef(null) const workerRef = useRef(null) + const duckClientRef = useRef(null) // SPIKE: virtual-server client const tableRef = useRef(null) const colMetaRef = useRef([]) const expandDepthRef = useRef(null) @@ -164,9 +170,17 @@ export default function Forecast({ sources = [], sourceId, versionId, refreshSou setSlice({}) expandDepthRef.current = null try { - const [perspective, dataResult, meta] = await Promise.all([ - loadPerspective(), - fetch(`/api/versions/${vid}/data`).then(async r => { + // In DUCK_MODE the heavy /data fetch is replaced by a tiny /perspective/init + // (materialize on server, returns hosted table id) — no rows cross the wire. + const dataPromise = DUCK_MODE + ? fetch('/api/perspective/init', { + method: 'POST', headers: { 'Content-Type': 'application/json' }, + body: JSON.stringify({ versionId: vid }), + }).then(async r => { + if (!r.ok) { const { error } = await r.json(); throw new Error(error || 'init failed') } + return r.json() // { tableId, rows, materialize_ms } + }) + : fetch(`/api/versions/${vid}/data`).then(async r => { if (!r.ok) { const { error } = await r.json(); throw new Error(error || 'Failed to load data') } const rowCount = parseInt(r.headers.get('X-Row-Count') || '0') const total = parseInt(r.headers.get('Content-Length') || '0') || null @@ -191,11 +205,14 @@ export default function Forecast({ sources = [], sourceId, versionId, refreshSou let pos = 0 for (const c of chunks) { merged.set(c, pos); pos += c.byteLength } return { buffer: merged.buffer, rowCount } - }), + }) + + const [perspective, dataResult, meta] = await Promise.all([ + loadPerspective(), + dataPromise, fetch(`/api/sources/${sid}/cols`).then(r => r.json()), ]) - const { buffer, rowCount } = dataResult colMetaRef.current = meta const validCols = new Set([ ...meta.filter(c => ['dimension','value','units','date'].includes(c.role)).map(c => c.cname), @@ -203,26 +220,44 @@ export default function Forecast({ sources = [], sourceId, versionId, refreshSou ]) const tableName = `fc_${vid}` - if (rowCount >= 500000) setLargeDataset(true) - if (myId !== initIdRef.current) return - if (!workerRef.current) workerRef.current = await perspective.worker() - const worker = workerRef.current + if (DUCK_MODE) { + // ---- SPIKE: server-side DuckDB virtual server ---- + setDuckStats({ rows: dataResult.rows, materializeMs: dataResult.materialize_ms, + queries: 0, lastMs: null, lastBytes: null }) + const handler = makeDuckServerHandler(perspective, { + onTiming: (ms, bytes) => setDuckStats(s => ({ + ...(s || {}), lastMs: Math.round(ms), lastBytes: bytes, queries: (s?.queries || 0) + 1, + })), + }) + const port = await perspective.createMessageHandler(handler) + const client = await perspective.worker(Promise.resolve(port)) + duckClientRef.current = client + if (tableRef.current) { try { await tableRef.current.delete() } catch {} tableRef.current = null } + tableRef.current = await client.open_table(dataResult.tableId) + } else { + // ---- client-side WASM path (rows loaded into the browser) ---- + const { buffer, rowCount } = dataResult + if (rowCount >= 500000) setLargeDataset(true) - // Clean up the previous table — by JS reference first, then by name in the - // worker registry (covers the case where the ref was lost or delete failed). - if (tableRef.current) { - try { await tableRef.current.delete() } catch {} - tableRef.current = null + if (!workerRef.current) workerRef.current = await perspective.worker() + const worker = workerRef.current + + // Clean up the previous table — by JS reference first, then by name in the + // worker registry (covers the case where the ref was lost or delete failed). + if (tableRef.current) { + try { await tableRef.current.delete() } catch {} + tableRef.current = null + } + try { + const stale = await worker.open_table(tableName) + if (stale) await stale.delete() + } catch {} + + const opts = { name: tableName, index: 'pf_id' } + tableRef.current = await (rowCount > 0 ? worker.table(buffer, opts) : worker.table([], opts)) } - try { - const stale = await worker.open_table(tableName) - if (stale) await stale.delete() - } catch {} - - const opts = { name: tableName, index: 'pf_id' } - tableRef.current = await (rowCount > 0 ? worker.table(buffer, opts) : worker.table([], opts)) if (myId !== initIdRef.current) { try { await tableRef.current.delete() } catch {} @@ -301,6 +336,14 @@ export default function Forecast({ sources = [], sourceId, versionId, refreshSou async function applyDepth(d) { const viewer = viewerRef.current if (!viewer) return + if (DUCK_MODE) { + // The SQL virtual server has no handler for the imperative ViewSetDepthReq + // that view.set_depth() emits. Drive depth declaratively through the view + // config instead — tableMakeView bakes group_by_depth into the query. + await viewer.restore({ group_by_depth: d }) + expandDepthRef.current = d + return + } const view = await viewer.getView() await view.set_depth(d) const plugin = await viewer.getPlugin() @@ -741,6 +784,17 @@ export default function Forecast({ sources = [], sourceId, versionId, refreshSou Large dataset — pivot may take a moment to render )} + {DUCK_MODE && duckStats && ( +
+
DuckDB server engine
+
{duckStats.rows?.toLocaleString()} rows · materialize {duckStats.materializeMs}ms
+
+ last query: {duckStats.lastMs == null ? '—' : `${duckStats.lastMs}ms`} + {duckStats.lastBytes != null ? ` · ${fmtBytes(duckStats.lastBytes)}` : ''} + {' '}· {duckStats.queries} total +
+
+ )}