constructive-io · pyramation · May 22, 2026 · May 22, 2026 · May 22, 2026
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         package: 
-          - { name: 'full', path: 'full', version: '17' }
+          - { name: 'full', path: 'full', version: '18' }
           - { name: 'v13', path: 'versions/13', version: '13' }
           - { name: 'v14', path: 'versions/14', version: '14' }
           - { name: 'v15', path: 'versions/15', version: '15' }
@@ -78,7 +78,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
         package: 
-          - { name: 'full', path: 'full', version: '17' }
+          - { name: 'full', path: 'full', version: '18' }
           - { name: 'v13', path: 'versions/13', version: '13' }
           - { name: 'v14', path: 'versions/14', version: '14' }
           - { name: 'v15', path: 'versions/15', version: '15' }

diff --git a/README.md b/README.md
@@ -102,7 +102,7 @@ npm install @pgsql/enums
 - **Just need to parse SQL?** → Use `libpg-query` (lightweight, all PG versions)
 - **Need multiple versions at runtime?** → Use `@pgsql/parser` (dynamic version selection)
 - **Need TypeScript types?** → Add `@pgsql/types` and/or `@pgsql/enums`
-- **Need fingerprint, normalize, or deparse?** → Use `@libpg-query/parser` (PG 17 only)
+- **Need fingerprint, normalize, scan, or PL/pgSQL parsing?** → Use `@libpg-query/parser` (PG 18)
 
 
 ## API Documentation

diff --git a/full/Makefile b/full/Makefile
@@ -2,7 +2,7 @@ WASM_OUT_DIR := wasm
 WASM_OUT_NAME := libpg-query
 WASM_MODULE_NAME := PgQueryModule
 LIBPG_QUERY_REPO := https://github.com/pganalyze/libpg_query.git
-LIBPG_QUERY_TAG := 17-6.1.0
+LIBPG_QUERY_TAG := 18.0.0
 
 CACHE_DIR := .cache
 
@@ -57,7 +57,7 @@ ifdef EMSCRIPTEN
 		-I$(LIBPG_QUERY_DIR) \
 		-I$(LIBPG_QUERY_DIR)/vendor \
 		-L$(LIBPG_QUERY_DIR) \
-		-sEXPORTED_FUNCTIONS="['_malloc','_free','_wasm_parse_query','_wasm_parse_query_protobuf','_wasm_get_protobuf_len','_wasm_deparse_protobuf','_wasm_parse_plpgsql','_wasm_fingerprint','_wasm_normalize_query','_wasm_scan','_wasm_parse_query_detailed','_wasm_free_detailed_result','_wasm_free_string','_wasm_parse_query_raw','_wasm_free_parse_result']" \
+		-sEXPORTED_FUNCTIONS="['_malloc','_free','_wasm_parse_query','_wasm_parse_plpgsql','_wasm_fingerprint','_wasm_normalize_query','_wasm_scan','_wasm_parse_query_detailed','_wasm_free_detailed_result','_wasm_free_string','_wasm_parse_query_raw','_wasm_free_parse_result']" \
 		-sEXPORTED_RUNTIME_METHODS="['lengthBytesUTF8','stringToUTF8','UTF8ToString','getValue','HEAPU8','HEAPU32']" \
 		-sEXPORT_NAME="$(WASM_MODULE_NAME)" \
 		-sENVIRONMENT="web,node,worker" \

diff --git a/full/README.md b/full/README.md
@@ -95,30 +95,6 @@ import { parsePlPgSQLSync } from '@libpg-query/parser';
 const result = parsePlPgSQLSync(functionSql);
 ```
 
-### `deparse(parseTree: ParseResult): Promise<string>`
-
-Converts a parse tree back to SQL string. Returns a Promise for the SQL string.
-
-```typescript
-import { parse, deparse } from '@libpg-query/parser';
-
-const parseTree = await parse('SELECT * FROM users WHERE active = true');
-const sql = await deparse(parseTree);
-// Returns: string - reconstructed SQL query
-```
-
-### `deparseSync(parseTree: ParseResult): string`
-
-Synchronous version that converts a parse tree back to SQL string directly.
-
-```typescript
-import { parseSync, deparseSync } from '@libpg-query/parser';
-
-const parseTree = parseSync('SELECT * FROM users WHERE active = true');
-const sql = deparseSync(parseTree);
-// Returns: string - reconstructed SQL query
-```
-
 ### `fingerprint(sql: string): Promise<string>`
 
 Generates a unique fingerprint for a SQL query that can be used for query identification and caching. Returns a Promise for a 16-character fingerprint string.
@@ -195,11 +171,10 @@ The library provides both async and sync methods. Async methods handle initializ
 Async methods handle initialization automatically and are always safe to use:
 
 ```typescript
-import { parse, deparse, scan } from '@libpg-query/parser';
+import { parse, scan } from '@libpg-query/parser';
 
 // These handle initialization automatically
 const result = await parse('SELECT * FROM users');
-const sql = await deparse(result);
 const tokens = await scan('SELECT * FROM users');
 ```
 
@@ -325,19 +300,7 @@ pnpm run test
 
 ## Versions
 
-Our latest is built with `17-latest` branch from libpg_query
-
-
-| PG Major Version | libpg_query | Branch                                                                                         | npm 
-|--------------------------|-------------|------------------------------------------------------------------------------------------------|---------|
-| 17                       | 17-latest   | [`17-latest`](https://github.com/constructive-io/libpg-query-node/tree/17-latest)                       | [`libpg-query@17.2.0`](https://www.npmjs.com/package/libpg-query/v/latest)
-| 16                       | 16-latest   | [`16-latest`](https://github.com/constructive-io/libpg-query-node/tree/16-latest)                       | [`libpg-query@16.2.0`](https://www.npmjs.com/package/libpg-query/v/16.2.0)
-| 15                       | 15-latest   | [`15-latest`](https://github.com/constructive-io/libpg-query-node/tree/15-latest)                       | [`libpg-query@15.1.0`](https://www.npmjs.com/package/libpg-query/v/15.1.0)
-| 14                       | 14-latest   | [`14-latest`](https://github.com/constructive-io/libpg-query-node/tree/14-latest)                       | [`libpg-query@14.0.0`](https://www.npmjs.com/package/libpg-query/v/14.0.0)
-| 13                       | 13-latest   | [`13-latest`](https://github.com/constructive-io/libpg-query-node/tree/13-latest)                       | [`libpg-query@13.3.1`](https://www.npmjs.com/package/libpg-query/v/13.3.1)
-| 12                       | (n/a)       |                                                                                                |
-| 11                       | (n/a)       |                                                                                                |
-| 10                       | 10-latest   |                        | `@1.3.1` ([tree](https://github.com/constructive-io/pgsql-parser/tree/39b7b1adc8914253226e286a48105785219a81ca))      |
+Built with the `18-latest` branch from libpg_query (tag `18.0.0`), based on PostgreSQL 18.
 
 
 ## Troubleshooting

diff --git a/full/package.json b/full/package.json
@@ -10,8 +10,7 @@
     "access": "public"
   },
   "files": [
-    "wasm/*",
-    "proto.js"
+    "wasm/*"
   ],
   "scripts": {
     "clean": "pnpm wasm:clean && rimraf cjs esm",
@@ -22,9 +21,8 @@
     "wasm:rebuild": "pnpm wasm:make rebuild",
     "wasm:clean": "pnpm wasm:make clean",
     "wasm:clean-cache": "pnpm wasm:make clean-cache",
-    "test": "node --test test/parsing.test.js test/deparsing.test.js test/fingerprint.test.js test/normalize.test.js test/plpgsql.test.js test/scan.test.js test/errors.test.js",
-    "yamlize": "node ./scripts/yamlize.js",
-    "protogen": "node ./scripts/protogen.js"
+    "test": "node --test test/parsing.test.js test/fingerprint.test.js test/normalize.test.js test/plpgsql.test.js test/scan.test.js test/errors.test.js",
+    "yamlize": "node ./scripts/yamlize.js"
   },
   "author": "Constructive <developers@constructive.io>",
   "license": "MIT",
@@ -33,12 +31,10 @@
     "url": "git://github.com/constructive-io/libpg-query-node.git"
   },
   "devDependencies": {
-    "@launchql/proto-cli": "1.25.0",
     "@yamlize/cli": "^0.8.0"
   },
   "dependencies": {
-    "@pgsql/types": "^17.6.0",
-    "@launchql/protobufjs": "7.2.6"
+    "@pgsql/types": "^18.0.0"
   },
   "keywords": [
     "sql",