Simply Postgres interface

Export more things in mod.ts
Add verbose protocol logging
2025-01-13 14:13:00 +11:00 · 2025-01-13 13:54:31 +11:00 · 2025-01-13 11:00:33 +11:00 · 2025-01-13 01:08:18 +11:00 · 2025-01-12 06:50:32 +11:00 · 2025-01-12 06:36:15 +11:00
11 changed files with 1138 additions and 494 deletions
--- a/README.md
+++ b/README.md
@@ -1,14 +1,35 @@
 # pglue

-## Performance
+The glue for TypeScript to PostgreSQL.

-pglue implements automatic query pipelining which makes it especially performant with many queries concurrently executed on a single connection.
+## Overview
+
+- 🌟 [High performance](#benchmarks), fully asynchronous, written in modern TypeScript
+- 🐢 First class Deno support
+- 💬 Automatic query parameterisation
+- 🌧️ Automatic query pipelining
+- 📣 Listen/notify support
+- 📤 Connection pool support
+
+## Installation
+
+```ts
+import pglue from "https://git.lua.re/luaneko/pglue/raw/tag/v0.3.3/mod.ts";
+// ...or from github:
+import pglue from "https://raw.githubusercontent.com/luaneko/pglue/refs/tags/v0.3.3/mod.ts";
+```
+
+## Documentation
+
+TODO: Write the documentation in more detail here.

 ## Benchmarks

-Performance is generally on par with [postgres.js][1] and up to **4x faster** than [deno-postgres][2]. Keep in mind that database driver benchmarks are largely dependent on the database performance itself and does not necessarily represent accurate real-world performance.
+Performance is generally on par with [postgres.js][1] and up to **5x faster** than [deno-postgres][2]. Keep in mind that database driver benchmarks are largely dependent on the database performance itself and does not necessarily represent accurate real-world performance.

-Tested on a 4 core 2800 MHz x86_64-pc-linux-gnu QEMU VM with Deno 2.1.4 and local PostgreSQL 17.1 installation connected via TCP on localhost:
+Tested on a 4 core, 2800 MHz, x86_64-pc-linux-gnu, QEMU VM, with Deno 2.1.4 and PostgreSQL 17.1 on localhost:
+
+Query `select * from pg_type`:

 ```
    CPU | Common KVM Processor v2.0
@@ -18,74 +39,78 @@ benchmark       time/iter (avg)        iter/s      (min … max)           p75
 --------------- ----------------------------- --------------------- --------------------------

 group select n=1
-pglue                    9.9 ms         101.1 (  7.9 ms …  17.8 ms)  10.2 ms  17.8 ms  17.8 ms
-postgres.js              8.8 ms         114.2 (  7.0 ms …   9.5 ms)   9.1 ms   9.5 ms   9.5 ms
-deno-postgres           37.4 ms          26.7 ( 25.3 ms …  42.8 ms)  39.2 ms  42.8 ms  42.8 ms
+pglue                    8.8 ms         113.8 (  7.2 ms …  11.8 ms)   9.7 ms  11.8 ms  11.8 ms
+postgres.js             10.8 ms          92.3 (  8.1 ms …  22.0 ms)  11.2 ms  22.0 ms  22.0 ms
+deno-postgres           38.9 ms          25.7 ( 23.5 ms …  51.9 ms)  40.3 ms  51.9 ms  51.9 ms

 summary
  pglue
-     1.13x slower than postgres.js
-     3.78x faster than deno-postgres
+     1.23x faster than postgres.js
+     4.42x faster than deno-postgres

 group select n=5
-pglue                   48.2 ms          20.8 ( 41.9 ms …  68.5 ms)  50.3 ms  68.5 ms  68.5 ms
-postgres.js             43.6 ms          22.9 ( 38.1 ms …  57.3 ms)  48.6 ms  57.3 ms  57.3 ms
-deno-postgres          186.5 ms           5.4 (138.4 ms … 213.2 ms) 193.6 ms 213.2 ms 213.2 ms
+pglue                   40.1 ms          25.0 ( 36.1 ms …  48.2 ms)  40.7 ms  48.2 ms  48.2 ms
+postgres.js             48.7 ms          20.5 ( 38.9 ms …  61.2 ms)  52.7 ms  61.2 ms  61.2 ms
+deno-postgres          184.7 ms           5.4 (166.5 ms … 209.5 ms) 190.7 ms 209.5 ms 209.5 ms

 summary
  pglue
-     1.11x slower than postgres.js
-     3.87x faster than deno-postgres
+     1.22x faster than postgres.js
+     4.61x faster than deno-postgres

 group select n=10
-pglue                   97.8 ms          10.2 ( 90.2 ms … 105.0 ms) 104.0 ms 105.0 ms 105.0 ms
-postgres.js             93.8 ms          10.7 ( 80.9 ms … 107.7 ms) 106.1 ms 107.7 ms 107.7 ms
-deno-postgres          333.9 ms           3.0 (205.6 ms … 394.9 ms) 377.4 ms 394.9 ms 394.9 ms
+pglue                   80.7 ms          12.4 ( 73.5 ms …  95.4 ms)  82.2 ms  95.4 ms  95.4 ms
+postgres.js             89.1 ms          11.2 ( 82.5 ms … 101.7 ms)  94.4 ms 101.7 ms 101.7 ms
+deno-postgres          375.3 ms           2.7 (327.4 ms … 393.9 ms) 390.7 ms 393.9 ms 393.9 ms
+
+summary
+  pglue
+     1.10x faster than postgres.js
+     4.65x faster than deno-postgres
+```
+
+Query `insert into my_table (a, b, c) values (${a}, ${b}, ${c})`:
+
+```
+group insert n=1
+pglue                  259.2 µs         3,858 (165.4 µs …   2.8 ms) 258.0 µs 775.4 µs   2.8 ms
+postgres.js            235.9 µs         4,239 (148.8 µs …   1.2 ms) 250.3 µs 577.4 µs 585.6 µs
+deno-postgres          306.7 µs         3,260 (198.8 µs …   1.3 ms) 325.9 µs   1.0 ms   1.3 ms
+
+summary
+  pglue
+     1.10x slower than postgres.js
+     1.18x faster than deno-postgres
+
+group insert n=10
+pglue                  789.7 µs         1,266 (553.2 µs …   2.7 ms) 783.4 µs   2.4 ms   2.7 ms
+postgres.js            755.6 µs         1,323 (500.5 µs …   3.4 ms) 795.0 µs   2.8 ms   3.4 ms
+deno-postgres            2.2 ms         458.1 (  1.6 ms …   5.2 ms)   2.3 ms   4.8 ms   5.2 ms

 summary
  pglue
     1.04x slower than postgres.js
-     3.42x faster than deno-postgres
-
-group insert n=1
-pglue                  237.5 µs         4,210 (143.9 µs …   1.3 ms) 249.2 µs 953.3 µs   1.3 ms
-postgres.js            242.5 µs         4,124 (137.4 µs … 886.4 µs) 263.4 µs 762.8 µs 865.5 µs
-deno-postgres          295.1 µs         3,389 (163.8 µs … 899.3 µs) 340.0 µs 641.7 µs 899.3 µs
-
-summary
-  pglue
-     1.02x faster than postgres.js
-     1.24x faster than deno-postgres
-
-group insert n=10
-pglue                    1.1 ms         869.6 (610.1 µs …   2.1 ms)   1.2 ms   2.0 ms   2.1 ms
-postgres.js            755.9 µs         1,323 (387.6 µs …   4.7 ms) 805.4 µs   2.8 ms   4.7 ms
-deno-postgres            2.3 ms         434.4 (  1.6 ms …  10.6 ms)   2.4 ms   6.5 ms  10.6 ms
-
-summary
-  pglue
-     1.52x slower than postgres.js
-     2.00x faster than deno-postgres
+     2.76x faster than deno-postgres

 group insert n=100
-pglue                    9.2 ms         109.0 (  5.5 ms …  15.6 ms)  10.4 ms  15.6 ms  15.6 ms
-postgres.js             14.8 ms          67.4 (  9.6 ms …  35.8 ms)  16.6 ms  35.8 ms  35.8 ms
-deno-postgres           18.8 ms          53.1 ( 14.5 ms …  25.8 ms)  20.9 ms  25.8 ms  25.8 ms
+pglue                    5.8 ms         172.0 (  3.2 ms …   9.9 ms)   6.8 ms   9.9 ms   9.9 ms
+postgres.js             13.0 ms          76.8 (  8.6 ms …  20.8 ms)  15.4 ms  20.8 ms  20.8 ms
+deno-postgres           18.5 ms          54.1 ( 14.3 ms …  32.1 ms)  20.0 ms  32.1 ms  32.1 ms

 summary
  pglue
-     1.62x faster than postgres.js
-     2.05x faster than deno-postgres
+     2.24x faster than postgres.js
+     3.18x faster than deno-postgres

 group insert n=200
-pglue                   15.0 ms          66.6 ( 11.1 ms …  19.0 ms)  16.7 ms  19.0 ms  19.0 ms
-postgres.js             28.1 ms          35.6 ( 22.8 ms …  40.0 ms)  29.1 ms  40.0 ms  40.0 ms
-deno-postgres           35.9 ms          27.9 ( 29.7 ms …  46.5 ms)  37.2 ms  46.5 ms  46.5 ms
+pglue                    8.8 ms         113.4 (  6.0 ms …  14.1 ms)  10.0 ms  14.1 ms  14.1 ms
+postgres.js             28.2 ms          35.5 ( 21.1 ms …  47.0 ms)  29.6 ms  47.0 ms  47.0 ms
+deno-postgres           37.0 ms          27.0 ( 32.0 ms …  48.1 ms)  39.4 ms  48.1 ms  48.1 ms

 summary
  pglue
-     1.87x faster than postgres.js
-     2.39x faster than deno-postgres
+     3.20x faster than postgres.js
+     4.20x faster than deno-postgres
 ```

 [1]: https://github.com/porsager/postgres
--- a/bench.ts
+++ b/bench.ts
@@ -1,4 +1,4 @@
-import * as pglue from "./mod.ts";
+import pglue from "./mod.ts";
 import postgres_js from "https://deno.land/x/postgresjs/mod.js";
 import * as deno_postgres from "https://deno.land/x/postgres/mod.ts";

--- a/deno.json
+++ b/deno.json
@@ -1,9 +1,5 @@
 {
  "name": "@luaneko/pglue",
-  "version": "0.1.0",
-  "exports": "./mod.ts",
-  "tasks": {
-    "test": "deno run --watch -A mod_test.ts",
-    "bench": "deno bench --watch -A"
-  }
+  "version": "0.3.3",
+  "exports": "./mod.ts"
 }
--- a/deno.lock
+++ b/deno.lock
@@ -2,23 +2,50 @@
  "version": "4",
  "specifiers": {
    "jsr:@badrap/valita@~0.4.2": "0.4.2",
+    "jsr:@std/assert@^1.0.10": "1.0.10",
+    "jsr:@std/bytes@^1.0.3": "1.0.4",
    "jsr:@std/bytes@^1.0.4": "1.0.4",
    "jsr:@std/encoding@^1.0.6": "1.0.6",
+    "jsr:@std/expect@*": "1.0.11",
+    "jsr:@std/internal@^1.0.5": "1.0.5",
    "jsr:@std/path@^1.0.8": "1.0.8",
+    "jsr:@std/streams@*": "1.0.8",
    "npm:pg-connection-string@^2.7.0": "2.7.0"
  },
  "jsr": {
    "@badrap/valita@0.4.2": {
      "integrity": "af8a829e82eac71adbc7b60352798f94dcc66d19fab16b657957ca9e646c25fd"
    },
+    "@std/assert@1.0.10": {
+      "integrity": "59b5cbac5bd55459a19045d95cc7c2ff787b4f8527c0dd195078ff6f9481fbb3",
+      "dependencies": [
+        "jsr:@std/internal"
+      ]
+    },
    "@std/bytes@1.0.4": {
      "integrity": "11a0debe522707c95c7b7ef89b478c13fb1583a7cfb9a85674cd2cc2e3a28abc"
    },
    "@std/encoding@1.0.6": {
      "integrity": "ca87122c196e8831737d9547acf001766618e78cd8c33920776c7f5885546069"
    },
+    "@std/expect@1.0.11": {
+      "integrity": "5aa5d5cf891e9a3249e45ea770de15189e5a2faee2122ee5746b10d1c310a19b",
+      "dependencies": [
+        "jsr:@std/assert",
+        "jsr:@std/internal"
+      ]
+    },
+    "@std/internal@1.0.5": {
+      "integrity": "54a546004f769c1ac9e025abd15a76b6671ddc9687e2313b67376125650dc7ba"
+    },
    "@std/path@1.0.8": {
      "integrity": "548fa456bb6a04d3c1a1e7477986b6cffbce95102d0bb447c67c4ee70e0364be"
+    },
+    "@std/streams@1.0.8": {
+      "integrity": "b41332d93d2cf6a82fe4ac2153b930adf1a859392931e2a19d9fabfb6f154fb3",
+      "dependencies": [
+        "jsr:@std/bytes@^1.0.3"
+      ]
    }
  },
  "npm": {
@@ -433,11 +460,17 @@
    "https://deno.land/x/postgresjs@v3.4.5/src/result.js": "001ff5e0c8d634674f483d07fbcd620a797e3101f842d6c20ca3ace936260465",
    "https://deno.land/x/postgresjs@v3.4.5/src/subscribe.js": "9e4d0c3e573a6048e77ee2f15abbd5bcd17da9ca85a78c914553472c6d6c169b",
    "https://deno.land/x/postgresjs@v3.4.5/src/types.js": "471f4a6c35412aa202a7c177c0a7e5a7c3bd225f01bbde67c947894c1b8bf6ed",
-    "https://git.lua.re/luaneko/lstd/raw/tag/0.2.0/async.ts": "20bc54c7260c2d2cd27ffcca33b903dde57a3a3635386d8e0c6baca4b253ae4e",
-    "https://git.lua.re/luaneko/lstd/raw/tag/0.2.0/bytes.ts": "5ffb12787dc3f9ef9680b6e2e4f5f9903783aa4c33b69e725b5df1d1c116bfe6",
-    "https://git.lua.re/luaneko/lstd/raw/tag/0.2.0/events.ts": "28d395b8eea87f9bf7908a44b351d2d3c609ba7eab62bcecd0d43be8ee603438",
-    "https://git.lua.re/luaneko/lstd/raw/tag/0.2.0/func.ts": "f1935f673365cd68939531d65ef18fe81b5d43dc795b03c34bb5ad821ab1c9ff",
-    "https://git.lua.re/luaneko/lstd/raw/tag/0.2.0/jit.ts": "c1db7820de95c48521b057c7cdf9aa41f7eaba77462407c29d3932e7da252d53",
-    "https://git.lua.re/luaneko/lstd/raw/tag/0.2.0/mod.ts": "95d8b15048a54cb82391825831f695b74e7c8b206317264a99c906ce25c63f13"
+    "https://git.lua.re/luaneko/lstd/raw/tag/v0.2.0/async.ts": "20bc54c7260c2d2cd27ffcca33b903dde57a3a3635386d8e0c6baca4b253ae4e",
+    "https://git.lua.re/luaneko/lstd/raw/tag/v0.2.0/bytes.ts": "5ffb12787dc3f9ef9680b6e2e4f5f9903783aa4c33b69e725b5df1d1c116bfe6",
+    "https://git.lua.re/luaneko/lstd/raw/tag/v0.2.0/events.ts": "28d395b8eea87f9bf7908a44b351d2d3c609ba7eab62bcecd0d43be8ee603438",
+    "https://git.lua.re/luaneko/lstd/raw/tag/v0.2.0/func.ts": "f1935f673365cd68939531d65ef18fe81b5d43dc795b03c34bb5ad821ab1c9ff",
+    "https://git.lua.re/luaneko/lstd/raw/tag/v0.2.0/jit.ts": "c1db7820de95c48521b057c7cdf9aa41f7eaba77462407c29d3932e7da252d53",
+    "https://git.lua.re/luaneko/lstd/raw/tag/v0.2.0/mod.ts": "95d8b15048a54cb82391825831f695b74e7c8b206317264a99c906ce25c63f13",
+    "https://git.lua.re/luaneko/lstd/raw/tag/v0.2.1/async.ts": "20bc54c7260c2d2cd27ffcca33b903dde57a3a3635386d8e0c6baca4b253ae4e",
+    "https://git.lua.re/luaneko/lstd/raw/tag/v0.2.1/bytes.ts": "94f4809b375800bb2c949e31082dfdf08d022db56c5b5c9c7dfe6f399285da6f",
+    "https://git.lua.re/luaneko/lstd/raw/tag/v0.2.1/events.ts": "28d395b8eea87f9bf7908a44b351d2d3c609ba7eab62bcecd0d43be8ee603438",
+    "https://git.lua.re/luaneko/lstd/raw/tag/v0.2.1/func.ts": "f1935f673365cd68939531d65ef18fe81b5d43dc795b03c34bb5ad821ab1c9ff",
+    "https://git.lua.re/luaneko/lstd/raw/tag/v0.2.1/jit.ts": "c1db7820de95c48521b057c7cdf9aa41f7eaba77462407c29d3932e7da252d53",
+    "https://git.lua.re/luaneko/lstd/raw/tag/v0.2.1/mod.ts": "589763be8ab18e7d6c5f5921e74ab44580f466c92acead401b2903d42d94112a"
  }
 }
--- a/lstd.ts
+++ b/lstd.ts
@@ -1 +1 @@
-export * from "https://git.lua.re/luaneko/lstd/raw/tag/0.2.0/mod.ts";
+export * from "https://git.lua.re/luaneko/lstd/raw/tag/v0.2.1/mod.ts";
--- a/mod.ts
+++ b/mod.ts
@@ -1,23 +1,22 @@
-import pg_conn_string from "npm:pg-connection-string@^2.7.0";
-import {
-  type Infer,
-  number,
-  object,
-  record,
-  string,
-  union,
-  unknown,
-} from "./valita.ts";
-import { Pool, wire_connect, type LogLevel } from "./wire.ts";
-import { sql_types, type SqlType, type SqlTypeMap } from "./query.ts";
+import pg_conn_str from "npm:pg-connection-string@^2.7.0";
+import { Pool, PoolOptions, Wire, WireOptions } from "./wire.ts";

 export {
+  Wire,
+  WireOptions,
  WireError,
+  Pool,
+  PoolOptions,
  PostgresError,
+  type Postgres,
+  type WireEvents,
+  type PoolEvents,
  type LogLevel,
+  type Parameters,
  type Transaction,
  type Channel,
-  type Parameters,
+  type ChannelEvents,
+  type NotificationHandler,
 } from "./wire.ts";
 export {
  type SqlFragment,
@@ -25,96 +24,49 @@ export {
  type SqlTypeMap,
  SqlTypeError,
  sql,
+  sql_types,
+  sql_format,
  is_sql,
  Query,
-  type Row,
-  type CommandResult,
  type Result,
-  type Results,
-  type ResultStream,
+  type Row,
+  type Rows,
+  type RowStream,
 } from "./query.ts";

-export type Options = {
-  host?: string;
-  port?: number | string;
-  user?: string;
-  password?: string;
-  database?: string | null;
-  max_connections?: number;
-  idle_timeout?: number;
-  runtime_params?: Record<string, string>;
-  types?: SqlTypeMap;
-};
+export default function postgres(
+  s: string,
+  options: Partial<PoolOptions> = {}
+) {
+  return new Pool(PoolOptions.parse(parse_conn(s, options), { mode: "strip" }));
+}

-type ParsedOptions = Infer<typeof ParsedOptions>;
-const ParsedOptions = object({
-  host: string().optional(() => "localhost"),
-  port: union(
-    number(),
-    string().map((s) => parseInt(s, 10))
-  ).optional(() => 5432),
-  user: string().optional(() => "postgres"),
-  password: string().optional(() => "postgres"),
-  database: string()
-    .nullable()
-    .optional(() => null),
-  runtime_params: record(string()).optional(() => ({})),
-  max_connections: number().optional(() => 10),
-  idle_timeout: number().optional(() => 20),
-  types: record(unknown())
-    .optional(() => ({}))
-    .map((types): SqlTypeMap => ({ ...sql_types, ...types })),
-});
+postgres.connect = connect;

-function parse_opts(s: string, opts: Options) {
+export async function connect(s: string, options: Partial<WireOptions> = {}) {
+  return await new Wire(
+    WireOptions.parse(parse_conn(s, options), { mode: "strip" })
+  ).connect();
+}
+
+function parse_conn(s: string, options: Partial<WireOptions>) {
  const {
    host,
    port,
    user,
    password,
    database,
-    ssl: _ssl, // TODO:
+    ssl: _ssl, // TODO: ssl support
    ...runtime_params
-  } = pg_conn_string.parse(s);
+  } = s ? pg_conn_str.parse(s) : {};

-  const { PGHOST, PGPORT, PGUSER, PGPASSWORD, PGDATABASE, USER } =
-    Deno.env.toObject();
-
-  return ParsedOptions.parse({
-    ...opts,
-    host: opts.host ?? host ?? PGHOST ?? undefined,
-    port: opts.port ?? port ?? PGPORT ?? undefined,
-    user: opts.user ?? user ?? PGUSER ?? USER ?? undefined,
-    password: opts.password ?? password ?? PGPASSWORD ?? undefined,
-    database: opts.database ?? database ?? PGDATABASE ?? undefined,
-    runtime_params: { ...runtime_params, ...opts.runtime_params },
-  });
-}
-
-export default function postgres(s: string, options: Options = {}) {
-  return new Postgres(parse_opts(s, options));
-}
-
-export function connect(s: string, options: Options = {}) {
-  return wire_connect(parse_opts(s, options));
-}
-
-postgres.connect = connect;
-
-export type PostgresEvents = {
-  log(level: LogLevel, ctx: object, msg: string): void;
-};
-
-export class Postgres extends Pool {
-  readonly #options;
-
-  constructor(options: ParsedOptions) {
-    super(options);
-    this.#options = options;
-  }
-
-  async connect() {
-    const wire = await wire_connect(this.#options);
-    return wire.on("log", (l, c, s) => this.emit("log", l, c, s));
-  }
+  return {
+    ...options,
+    host: options.host ?? host,
+    port: options.port ?? port,
+    user: options.user ?? user,
+    password: options.password ?? password,
+    database: options.database ?? database,
+    runtime_params: { ...runtime_params, ...options.runtime_params },
+  };
 }
--- a/mod_test.ts
+++ b/mod_test.ts
@@ -1,23 +0,0 @@
-import postgres from "./mod.ts";
-
-await using pool = postgres(`postgres://test:test@localhost:5432/test`, {
-  runtime_params: { client_min_messages: "INFO" },
-});
-
-pool.on("log", (level, ctx, msg) => console.info(`${level}: ${msg}`, ctx));
-
-await pool.begin(async (pg, tx) => {
-  await pg.query`
-    create table my_test (
-      key integer primary key generated always as identity,
-      data text not null
-    )
-  `;
-
-  await pg.query`
-    insert into my_test (data) values (${[1, 2, 3]}::bytea)
-  `;
-
-  console.log(await pg.query`select * from my_test`);
-  await tx.rollback();
-});
--- a/query.ts
+++ b/query.ts
@@ -1,4 +1,4 @@
-import type { ObjectType } from "./valita.ts";
+import type * as v from "./valita.ts";
 import { from_hex, to_hex, to_utf8 } from "./lstd.ts";

 export const sql_format = Symbol.for(`re.lua.pglue.sql_format`);
@@ -127,10 +127,36 @@ export const bool: SqlType = {
    return s !== "f";
  },
  output(x) {
-    return typeof x === "undefined" || x === null ? null : x ? "t" : "f";
+    if (typeof x === "undefined" || x === null) return null;
+    const b = bool_names[String(x).toLowerCase()];
+    if (typeof b === "boolean") return b ? "t" : "f";
+    else throw new SqlTypeError(`invalid bool output '${x}'`);
  },
 };

+const bool_names: Partial<Record<string, boolean>> = {
+  // https://www.postgresql.org/docs/current/datatype-boolean.html#DATATYPE-BOOLEAN
+  t: true,
+  tr: true,
+  tru: true,
+  true: true,
+  y: true,
+  ye: true,
+  yes: true,
+  on: true,
+  1: true,
+  f: false,
+  fa: false,
+  fal: false,
+  fals: false,
+  false: false,
+  n: false,
+  no: false,
+  of: false,
+  off: false,
+  0: false,
+};
+
 export const text: SqlType = {
  input(s) {
    return s;
@@ -142,6 +168,23 @@ export const text: SqlType = {
  },
 };

+export const char: SqlType = {
+  input(c) {
+    const n = c.charCodeAt(0);
+    if (c.length === 1 && 0 <= n && n <= 255) return c;
+    throw new SqlTypeError(`invalid char input '${c}'`);
+  },
+  output(x) {
+    let c: string;
+    if (typeof x === "undefined" || x === null) return null;
+    else if (typeof x === "number") c = String.fromCharCode(x);
+    else c = String(x);
+    const n = c.charCodeAt(0);
+    if (c.length === 1 && 0 <= n && n <= 255) return c;
+    else throw new SqlTypeError(`invalid char output '${x}'`);
+  },
+};
+
 export const int2: SqlType = {
  input(s) {
    const n = Number(s);
@@ -175,6 +218,22 @@ export const int4: SqlType = {
  },
 };

+export const uint4: SqlType = {
+  input(s) {
+    const n = Number(s);
+    if (Number.isInteger(n) && 0 <= n && n <= 4294967295) return n;
+    else throw new SqlTypeError(`invalid uint4 input '${s}'`);
+  },
+  output(x) {
+    let n: number;
+    if (typeof x === "undefined" || x === null) return null;
+    else if (typeof x === "number") n = x;
+    else n = Number(x);
+    if (Number.isInteger(n) && 0 <= n && n <= 4294967295) return n.toString();
+    else throw new SqlTypeError(`invalid uint4 output '${x}'`);
+  },
+};
+
 export const int8: SqlType = {
  input(s) {
    const n = BigInt(s);
@@ -188,14 +247,36 @@ export const int8: SqlType = {
    else if (typeof x === "number" || typeof x === "bigint") n = x;
    else if (typeof x === "string") n = BigInt(x);
    else n = Number(x);
-    if (Number.isInteger(n)) {
-      if (-9007199254740991 <= n && n <= 9007199254740991) return n.toString();
-      else throw new SqlTypeError(`unsafe int8 output '${x}'`);
-    } else if (typeof n === "bigint") {
-      if (-9223372036854775808n <= n && n <= 9223372036854775807n)
-        return n.toString();
-    }
-    throw new SqlTypeError(`invalid int8 output '${x}'`);
+    if (
+      (typeof n === "number" && Number.isSafeInteger(n)) ||
+      (typeof n === "bigint" &&
+        -9223372036854775808n <= n &&
+        n <= 9223372036854775807n)
+    ) {
+      return n.toString();
+    } else throw new SqlTypeError(`invalid int8 output '${x}'`);
+  },
+};
+
+export const uint8: SqlType = {
+  input(s) {
+    const n = BigInt(s);
+    if (0n <= n && n <= 9007199254740991n) return Number(n);
+    else if (0n <= n && n <= 18446744073709551615n) return n;
+    else throw new SqlTypeError(`invalid uint8 input '${s}'`);
+  },
+  output(x) {
+    let n: number | bigint;
+    if (typeof x === "undefined" || x === null) return null;
+    else if (typeof x === "number" || typeof x === "bigint") n = x;
+    else if (typeof x === "string") n = BigInt(x);
+    else n = Number(x);
+    if (
+      (typeof n === "number" && Number.isSafeInteger(n) && 0 <= n) ||
+      (typeof n === "bigint" && 0n <= n && n <= 18446744073709551615n)
+    ) {
+      return n.toString();
+    } else throw new SqlTypeError(`invalid uint8 output '${x}'`);
  },
 };

@@ -279,60 +360,63 @@ export const json: SqlType = {
 };

 export const sql_types: SqlTypeMap = {
+  0: text,
  16: bool, // bool
-  25: text, // text
+  17: bytea, // bytea
+  18: char, // char
+  19: text, // name
+  20: int8, // int8
  21: int2, // int2
  23: int4, // int4
-  20: int8, // int8
-  26: int8, // oid
+  25: text, // text
+  26: uint4, // oid
+  28: uint4, // xid
+  29: uint4, // cid
+  114: json, // json
  700: float4, // float4
  701: float8, // float8
  1082: timestamptz, // date
  1114: timestamptz, // timestamp
  1184: timestamptz, // timestamptz
-  17: bytea, // bytea
-  114: json, // json
  3802: json, // jsonb
+  5069: uint8, // xid8
 };

 sql.types = sql_types;

-type ReadonlyTuple<T extends readonly unknown[]> = readonly [...T];
-
-export interface CommandResult {
+export interface Result {
  readonly tag: string;
 }

-export interface Result<T> extends CommandResult, ReadonlyTuple<[T]> {
-  readonly row: T;
-}
-
-export interface Results<T> extends CommandResult, ReadonlyArray<T> {
+export interface Rows<T> extends Result, ReadonlyArray<T> {
  readonly rows: ReadonlyArray<T>;
 }

-export interface ResultStream<T>
-  extends AsyncIterable<T[], CommandResult, void> {}
+export interface RowStream<T> extends AsyncIterable<T[], Result, void> {}

 export interface Row extends Iterable<unknown, void, void> {
  [column: string]: unknown;
 }

 export interface QueryOptions {
+  readonly simple: boolean;
  readonly chunk_size: number;
  readonly stdin: ReadableStream<Uint8Array> | null;
  readonly stdout: WritableStream<Uint8Array> | null;
 }

-export class Query<T = Row>
-  implements PromiseLike<Results<T>>, ResultStream<T>
-{
+export class Query<T = Row> implements PromiseLike<Rows<T>>, RowStream<T> {
  readonly #f;

-  constructor(f: (options: Partial<QueryOptions>) => ResultStream<T>) {
+  constructor(f: (options: Partial<QueryOptions>) => RowStream<T>) {
    this.#f = f;
  }

+  simple(simple = true) {
+    const f = this.#f;
+    return new Query((o) => f({ simple, ...o }));
+  }
+
  chunked(chunk_size = 1) {
    const f = this.#f;
    return new Query((o) => f({ chunk_size, ...o }));
@@ -386,7 +470,7 @@ export class Query<T = Row>
    });
  }

-  parse<S extends ObjectType>(
+  parse<S extends v.ObjectType>(
    type: S,
    { mode = "strip" }: { mode?: "passthrough" | "strict" | "strip" } = {}
  ) {
@@ -399,26 +483,25 @@ export class Query<T = Row>
    return this.#f(options);
  }

-  async first(): Promise<Result<T>> {
-    const { rows, tag } = await this.collect(1);
-    if (!rows.length) throw new Error(`expected one row, got none instead`);
-    const row = rows[0];
-    return Object.assign([row] as const, { row: rows[0], tag });
+  async first(): Promise<T> {
+    const rows = await this.collect(1);
+    if (rows.length !== 0) return rows[0];
+    else throw new TypeError(`expected one row, got none instead`);
  }

-  async first_or<S>(value: S): Promise<Result<T | S>> {
-    const { rows, tag } = await this.collect(1);
-    const row = rows.length ? rows[0] : value;
-    return Object.assign([row] as const, { row: rows[0], tag });
+  async first_or<S>(value: S): Promise<T | S> {
+    const rows = await this.collect(1);
+    return rows.length !== 0 ? rows[0] : value;
  }

-  async collect(count = Number.POSITIVE_INFINITY): Promise<Results<T>> {
+  async collect(count = Number.POSITIVE_INFINITY): Promise<Rows<T>> {
    const iter = this[Symbol.asyncIterator]();
    let next;
    const rows = [];
    for (let i = 0; !(next = await iter.next()).done; ) {
-      const { value: c } = next;
-      for (let j = 0, n = c.length; i < count && j < n; ) rows[i++] = c[j++];
+      const chunk = next.value;
+      for (let j = 0, n = chunk.length; i < count && j < n; )
+        rows[i++] = chunk[j++];
    }
    return Object.assign(rows, next.value, { rows });
  }
@@ -437,8 +520,8 @@ export class Query<T = Row>
    return n;
  }

-  then<S = Results<T>, U = never>(
-    f?: ((rows: Results<T>) => S | PromiseLike<S>) | null,
+  then<S = Rows<T>, U = never>(
+    f?: ((rows: Rows<T>) => S | PromiseLike<S>) | null,
    g?: ((reason?: unknown) => U | PromiseLike<U>) | null
  ) {
    return this.collect().then(f, g);
@@ -453,7 +536,8 @@ function str_to_stream(s: string) {
  return new ReadableStream({
    type: "bytes",
    start(c) {
-      c.enqueue(to_utf8(s)), c.close();
+      if (s.length !== 0) c.enqueue(to_utf8(s));
+      c.close();
    },
  });
 }
--- a/ser.ts
+++ b/ser.ts
@@ -11,7 +11,7 @@ import {
  write_i8,
 } from "./lstd.ts";

-export class EncoderError extends Error {
+export class EncoderError extends TypeError {
  override get name() {
    return this.constructor.name;
  }
--- a/test.ts
+++ b/test.ts
@@ -0,0 +1,228 @@
+import pglue, { PostgresError, SqlTypeError } from "./mod.ts";
+import { expect } from "jsr:@std/expect";
+import { toText } from "jsr:@std/streams";
+
+const pool = pglue(`postgres://test:test@localhost:5432/test`, {
+  runtime_params: { client_min_messages: "INFO" },
+  verbose: true,
+});
+
+pool.on("log", (level, ctx, msg) => console.info(`${level}: ${msg}`, ctx));
+
+Deno.test(`integers`, async () => {
+  await using pg = await pool.connect();
+  await using _tx = await pg.begin();
+
+  const { a, b, c } = await pg.query`
+    select
+      ${"0x100"}::int2 as a,
+      ${777}::int4 as b,
+      ${{
+        [Symbol.toPrimitive](hint: string) {
+          expect(hint).toBe("number");
+          return "1234";
+        },
+      }}::int8 as c
+  `.first();
+
+  expect(a).toBe(0x100);
+  expect(b).toBe(777);
+  expect(c).toBe(1234);
+
+  const { large } =
+    await pg.query`select ${"10000000000000000"}::int8 as large`.first();
+
+  expect(large).toBe(10000000000000000n);
+
+  await expect(pg.query`select ${100000}::int2`).rejects.toThrow(SqlTypeError);
+  await expect(pg.query`select ${"100000"}::text::int2`).rejects.toThrow(
+    PostgresError
+  );
+});
+
+Deno.test(`boolean`, async () => {
+  await using pg = await pool.connect();
+  await using _tx = await pg.begin();
+
+  const { a, b, c } = await pg.query`
+    select
+      ${true}::bool as a,
+      ${"n"}::bool as b,
+      ${undefined}::bool as c
+  `.first();
+
+  expect(a).toBe(true);
+  expect(b).toBe(false);
+  expect(c).toBe(null);
+});
+
+Deno.test(`bytea`, async () => {
+  await using pg = await pool.connect();
+  await using _tx = await pg.begin();
+
+  const { string, array, buffer } = await pg.query`
+    select
+      ${"hello, world"}::bytea as string,
+      ${[1, 2, 3, 4, 5]}::bytea as array,
+      ${Uint8Array.of(5, 4, 3, 2, 1)}::bytea as buffer
+  `.first();
+
+  expect(string).toEqual(new TextEncoder().encode("hello, world"));
+  expect(array).toEqual(Uint8Array.of(1, 2, 3, 4, 5));
+  expect(buffer).toEqual(Uint8Array.of(5, 4, 3, 2, 1));
+});
+
+Deno.test(`row`, async () => {
+  await using pg = await pool.connect();
+  await using _tx = await pg.begin();
+
+  expect(
+    (
+      await pg.query`create table my_table (a text not null, b text not null, c text not null)`
+    ).tag
+  ).toBe(`CREATE TABLE`);
+
+  expect(
+    (
+      await pg.query`copy my_table from stdin`.stdin(
+        `field a\tfield b\tfield c`
+      )
+    ).tag
+  ).toBe(`COPY 1`);
+
+  const row = await pg.query`select * from my_table`.first();
+  {
+    // columns by name
+    const { a, b, c } = row;
+    expect(a).toBe("field a");
+    expect(b).toBe("field b");
+    expect(c).toBe("field c");
+  }
+  {
+    // columns by index
+    const [a, b, c] = row;
+    expect(a).toBe("field a");
+    expect(b).toBe("field b");
+    expect(c).toBe("field c");
+  }
+
+  const { readable, writable } = new TransformStream<Uint8Array>(
+    {},
+    new ByteLengthQueuingStrategy({ highWaterMark: 4096 }),
+    new ByteLengthQueuingStrategy({ highWaterMark: 4096 })
+  );
+  await pg.query`copy my_table to stdout`.stdout(writable);
+  expect(await toText(readable)).toBe(`field a\tfield b\tfield c\n`);
+});
+
+Deno.test(`sql injection`, async () => {
+  await using pg = await pool.connect();
+  await using _tx = await pg.begin();
+
+  const input = `injection'); drop table users; --`;
+
+  expect((await pg.query`create table users (name text not null)`).tag).toBe(
+    `CREATE TABLE`
+  );
+
+  expect((await pg.query`insert into users (name) values (${input})`).tag).toBe(
+    `INSERT 0 1`
+  );
+
+  const { name } = await pg.query<{ name: string }>`
+    select name from users
+  `.first();
+
+  expect(name).toBe(input);
+});
+
+Deno.test(`listen/notify`, async () => {
+  await using pg = await pool.connect();
+  const sent: string[] = [];
+
+  await using ch = await pg.listen(`my channel`, (payload) => {
+    expect(payload).toBe(sent.shift());
+  });
+
+  for (let i = 0; i < 5; i++) {
+    const payload = `test payload ${i}`;
+    sent.push(payload);
+    await ch.notify(payload);
+  }
+
+  expect(sent.length).toBe(0);
+});
+
+Deno.test(`transactions`, async () => {
+  await using pg = await pool.connect();
+
+  await pg.begin(async (pg) => {
+    await pg.begin(async (pg, tx) => {
+      await pg.query`create table my_table (field text not null)`;
+      await tx.rollback();
+    });
+
+    await expect(pg.query`select * from my_table`).rejects.toThrow(
+      PostgresError
+    );
+  });
+
+  await expect(pg.query`select * from my_table`).rejects.toThrow(PostgresError);
+
+  await pg.begin(async (pg) => {
+    await pg.begin(async (pg, tx) => {
+      await pg.begin(async (pg, tx) => {
+        await pg.begin(async (pg) => {
+          await pg.query`create table my_table (field text not null)`;
+        });
+        await tx.commit();
+      });
+
+      expect(await pg.query`select * from my_table`.count()).toBe(0);
+      await tx.rollback();
+    });
+
+    await expect(pg.query`select * from my_table`).rejects.toThrow(
+      PostgresError
+    );
+  });
+});
+
+Deno.test(`streaming`, async () => {
+  await using pg = await pool.connect();
+  await using _tx = await pg.begin();
+
+  await pg.query`create table my_table (field text not null)`;
+
+  for (let i = 0; i < 20; i++) {
+    await pg.query`insert into my_table (field) values (${i})`;
+  }
+
+  let i = 0;
+  for await (const chunk of pg.query`select * from my_table`.chunked(5)) {
+    expect(chunk.length).toBe(5);
+    for (const row of chunk) expect(row.field).toBe(`${i++}`);
+  }
+
+  expect(i).toBe(20);
+});
+
+Deno.test(`simple`, async () => {
+  await using pg = await pool.connect();
+  await using _tx = await pg.begin();
+
+  const rows = await pg.query`
+    create table my_table (field text not null);
+    insert into my_table (field) values ('one'), ('two'), ('three');
+    select * from my_table;
+    select * from my_table where field = 'two';
+  `.simple();
+
+  expect(rows.length).toBe(4);
+
+  const [{ field: a }, { field: b }, { field: c }, { field: d }] = rows;
+  expect(a).toBe("one");
+  expect(b).toBe("two");
+  expect(c).toBe("three");
+  expect(d).toBe("two");
+});
--- a/wire.ts
+++ b/wire.ts
Author	SHA1	Message	Date
luaneko	33b5158327	Simply Postgres interface	2025-01-13 14:13:00 +11:00
luaneko	7f3e3b236b	Export more things in mod.ts	2025-01-13 13:54:31 +11:00
luaneko	3d65dcecf2	Add verbose protocol logging	2025-01-13 11:00:33 +11:00
luaneko	90dc51a914	Rewrite wire reconnection logic	2025-01-13 01:08:18 +11:00
luaneko	a1b66c4c48	Explicitly type postgres function type parameters	2025-01-12 06:50:32 +11:00
luaneko	119c06565c	Rewrite options handling	2025-01-12 06:36:15 +11:00
luaneko	d959a80678	Fix write_copy_in not being awaited in simple query	2025-01-12 03:35:40 +11:00
luaneko	c2ff6b4359	Add more postgres utility wrappers	2025-01-12 03:28:07 +11:00
luaneko	a4c0055c79	Return row value direct in .first() and .first_or(x)	2025-01-12 01:25:55 +11:00
luaneko	00002525e4	Implement wire automatic reconnection	2025-01-12 01:09:34 +11:00
luaneko	328cc63536	Update benchmark results	2025-01-12 00:26:38 +11:00
luaneko	29b79f25c0	Fix close event not firing on wire	2025-01-12 00:23:26 +11:00
luaneko	29b2796627	Log query inside pipeline handler	2025-01-11 07:24:23 +11:00
luaneko	02f8098811	Code quality check	2025-01-11 07:21:44 +11:00
luaneko	da7f7e12f3	Implement wire reconnect support	2025-01-11 06:02:32 +11:00
luaneko	6f9e9770cf	Ensure pipeline is locked during authentication phase	2025-01-11 02:43:42 +11:00
luaneko	137422601b	Implement simple query support	2025-01-11 02:00:05 +11:00
luaneko	3793e14f50	Add v prefix to all version tags	2025-01-11 00:53:45 +11:00
luaneko	b194397645	Optimise query request write	2025-01-11 00:46:17 +11:00
luaneko	858b7a95f3	Add streaming query testing code	2025-01-11 00:39:00 +11:00
luaneko	a88da00dec	Update version tag in readme	2025-01-11 00:28:51 +11:00
luaneko	cefe14b9dc	Ensure stdout writable stream is always closed	2025-01-11 00:28:14 +11:00
luaneko	4e68e34fd0	Add more testing code	2025-01-11 00:15:19 +11:00
luaneko	826190ecc9	Add github import url	2025-01-10 20:35:32 +11:00
luaneko	72749e5841	Update readme	2025-01-10 20:32:06 +11:00
luaneko	b9829bc70d	Update readme	2025-01-10 19:56:16 +11:00
luaneko	9eecf29bc5	Update readme	2025-01-10 19:53:04 +11:00
luaneko	8964cb342e	Update benchmarks	2025-01-10 19:32:41 +11:00