---
warning: DO NOT CHANGE THIS MANUALLY, THIS IS GENERATED BY https://github.com/duckdb/community-extensions repository, check README there
title: gcs
excerpt: |
  DuckDB Community Extensions
  DuckDB GCS Extension

extension:
  name: gcs
  description: DuckDB GCS Extension
  extended_description: A native GCS extension with support for standard Google auth methods
  version: 0.0.9
  language: C++
  build: cmake
  license: MIT
  excluded_platforms: "wasm_mvp;wasm_eh;wasm_threads;windows_amd64_mingw"
  maintainers:
    - northpolesec

repo:
  github: northpolesec/duckdb-gcs
  ref: f55eef6635f5b613d7cb90a98fe2ed7afcd0f0c8

docs:
  hello_world: |
    -- Add auth credentials using Application Default Creds
    D CREATE SECRET secret (TYPE gcp, PROVIDER credential_chain);

    -- Read a file from GCS
    D SELECT * FROM read_text('gcss://rah-public-gcs-testing/quack.txt');
    ┌─────────────────────────────────────────┬─────────┬───────┬──────────────────────────┐
    │                filename                 │ content │ size  │      last_modified       │
    │                 varchar                 │ varchar │ int64 │ timestamp with time zone │
    ├─────────────────────────────────────────┼─────────┼───────┼──────────────────────────┤
    │ gcss://rah-public-gcs-testing/quack.txt │ 🦆      │   4   │ 2025-09-23 16:20:03-04   │
    └─────────────────────────────────────────┴─────────┴───────┴──────────────────────────┘

extension_star_count: 32
extension_star_count_pretty: 32
extension_download_count: 74277
extension_download_count_pretty: 74.3k
image: '/images/community_extensions/social_preview/preview_community_extension_gcs.png'
layout: community_extension_doc
---
### Compatibility Matrix

This table covers all DuckDB releases that have not reached [end-of-life](https://duckdb.org/release_calendar), including LTS releases, and shows the 2 most recent patch releases of each. Older patch releases are not listed, but the extension may be available for them as well.

<div class="extension_compatibility_table"></div>

| Platform | 1.4.4 | 1.4.5 | 1.5.5 | 1.5.6 | 2.0.0 |
| :--- | :---: | :---: | :---: | :---: | :---: |
| Linux AMD64 | ✅ | ❌ | ✅ | ✅ | ✅ |
| Linux ARM64 | ✅ | ❌ | ✅ | ✅ | ✅ |
| macOS AMD64 | ✅ | ❌ | ✅ | ✅ | ✅ |
| macOS ARM64 | ✅ | ❌ | ✅ | ✅ | ✅ |
| Windows AMD64 | ❌ | ❌ | ✅ | ✅ | ✅ |
| Windows ARM64 | ❌ | ❌ | ❌ | ❌ | ❌ |
| WebAssembly | ❌ | ❌ | ❌ | ❌ | ❌ |

### Installing and Loading
```sql
INSTALL {{ page.extension.name }} FROM community;
LOAD {{ page.extension.name }};
```

{% if page.docs.hello_world %}
### Example
```sql
{{ page.docs.hello_world }}```
{% endif %}

{% if page.docs.extended_description %}
### About {{ page.extension.name }}
{{ page.docs.extended_description }}
{% endif %}
### Added Functions

<div class="extension_functions_table"></div>

This extension does not add any functions.

### Overloaded Functions

<div class="extension_functions_table"></div>

This extension does not add any function overloads.

### Added Types

<div class="extension_types_table"></div>

This extension does not add any types.

### Added Settings

<div class="extension_settings_table"></div>

|              name              |                                                                                          description                                                                                           | input_type | scope  | aliases | typed_value |
|--------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------|--------|---------|-------------|
| gcs_enable_grpc                | Use gRPC for connection to Google Cloud Storage. Can improve performance, especially when being used from Google Cloud. Default is false.                                                      | BOOLEAN    | GLOBAL | []      | false       |
| gcs_enable_metadata_cache      | Enable caching of object metadata (size, modification time) to reduce API calls. Set to false to disable caching for debugging or when files change frequently.                                | BOOLEAN    | GLOBAL | []      | true        |
| gcs_list_cache_ttl             | Time-to-live in seconds for cached object listing results (used in glob operations). Default is 60 seconds. Increase for stable directories, decrease if objects are added/removed frequently. | INTEGER    | GLOBAL | []      | 60          |
| gcs_max_list_cache_entries     | Maximum number of list cache entries to prevent unbounded memory growth. Default is 1000. When limit is reached, least recently used entries are evicted.                                      | UBIGINT    | GLOBAL | []      | 1000        |
| gcs_max_metadata_cache_entries | Maximum number of metadata cache entries to prevent unbounded memory growth. Default is 10000. When limit is reached, least recently used entries are evicted.                                 | UBIGINT    | GLOBAL | []      | 10000       |
| gcs_metadata_cache_ttl         | Time-to-live in seconds for cached object metadata. Default is 300 seconds (5 minutes). Increase for stable files, decrease if files change frequently.                                        | INTEGER    | GLOBAL | []      | 300         |
| gcs_transfer_concurrency       | Number of concurrent worker threads to use when reading. Default is 5.                                                                                                                         | INTEGER    | GLOBAL | []      | 5           |
| temp_directory                 | Set the directory to which temporary files are written.                                                                                                                                        | VARCHAR    | GLOBAL | []      | post.db.tmp |