Fix array type inference

.gitignore

@@ -0,0 +1,213 @@
+### JetBrains template
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# AWS User-specific
+.idea/**/aws.xml
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# SonarLint plugin
+.idea/sonarlint/
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+### Node template
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+.cache
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+
+package-lock.json
+

package.json

@@ -1,5 +1,5 @@
 {
-  "name": "postgres",
+  "name": "@maybephilipp/postgres-tmp",
   "version": "3.4.5",
   "description": "Fastest full featured PostgreSQL client for Node.js",
   "type": "module",

src/types.js

@@ -1,6 +1,17 @@
 import { Query } from './query.js'
 import { Errors } from './errors.js'
 
+const defaultArrayTypes = {
+  "boolean": 1000,
+  "number": 1021,
+  "string": 1009,
+  "bigint": 1016,
+};
+
+export const inferArrayType = function inferArrayType(x) {
+  return defaultArrayTypes[typeof x[0]] || inferType(x[0]);
+}
+
 export const types = {
   string: {
     to: 25,
@@ -224,7 +235,7 @@ export const inferType = function inferType(x) {
     x instanceof Uint8Array ? 17 :
     (x === true || x === false) ? 16 :
     typeof x === 'bigint' ? 20 :
-    Array.isArray(x) ? inferType(x[0]) :
+    Array.isArray(x) ? inferArrayType(x) :
     0
   )
 }

tests/index.js

@@ -92,6 +92,22 @@ t('Boolean false', async() =>
   [false, (await sql`select ${ false } as x`)[0].x]
 )
 
+t('Boolean[] [true, false]', async() =>
+  ["[true,false]", JSON.stringify((await sql`select ${ [true, false] }::bool[] as x`)[0].x)]
+)
+
+t('Number[] [1, 2]', async() =>
+  ["[1,2]", JSON.stringify((await sql`select ${ [1, 2] }::int4[] as x`)[0].x)]
+)
+
+t('String[] ["a", "b"]', async() =>
+  ['["a","b"]', JSON.stringify((await sql`select ${ ["a", "b"] }::text[] as x`)[0].x)]
+)
+
+t('BigInt[] [BigInt(1), BigInt(2)]', async() =>
+  ['[1,2]', JSON.stringify((await sql`select ${ [BigInt(1), BigInt(2)] }::float4[] as x`)[0].x)]
+)
+
 t('Boolean true', async() =>
   [true, (await sql`select ${ true } as x`)[0].x]
 )
@@ -125,7 +141,7 @@ t('String array', async() =>
 )
 
 t('Array of Integer', async() =>
-  ['3', (await sql`select ${ sql.array([1, 2, 3]) } as x`)[0].x[2]]
+  [3, (await sql`select ${ sql.array([1, 2, 3]) } as x`)[0].x[2]]
 )
 
 t('Array of String', async() =>
@@ -143,11 +159,11 @@ t('Array of Box', async() => [
 ])
 
 t('Nested array n2', async() =>
-  ['4', (await sql`select ${ sql.array([[1, 2], [3, 4]]) } as x`)[0].x[1][1]]
+  [4, (await sql`select ${ sql.array([[1, 2], [3, 4]]) } as x`)[0].x[1][1]]
 )
 
 t('Nested array n3', async() =>
-  ['6', (await sql`select ${ sql.array([[[1, 2]], [[3, 4]], [[5, 6]]]) } as x`)[0].x[2][0][1]]
+  [6, (await sql`select ${ sql.array([[[1, 2]], [[3, 4]], [[5, 6]]]) } as x`)[0].x[2][0][1]]
 )
 
 t('Escape in arrays', async() =>