---
warning: DO NOT CHANGE THIS MANUALLY, THIS IS GENERATED BY https://github.com/duckdb/community-extensions repository, check README there
title: pintail
excerpt: |
  DuckDB Community Extensions
  Lightweight Geohash utilities for DuckDB, including coordinate and geometry encoding, cell decoding, bounding boxes, and neighbors.

extension:
  name: pintail
  description: Lightweight Geohash utilities for DuckDB, including coordinate and geometry encoding, cell decoding, bounding boxes, and neighbors.
  version: 0.2.1
  language: C++
  build: cmake
  license: Apache-2.0
  maintainers:
    - tshelianthus

repo:
  github: tshelianthus/duckdb-pintail
  # ref builds against DuckDB 2.0; variegata against v1.5.6. Same verified source.
  ref: 59ff51b7589bbcb611eaa556535087532af76265
  variegata: 59ff51b7589bbcb611eaa556535087532af76265

docs:
  hello_world: |
    INSTALL pintail FROM community;
    LOAD pintail;

    -- Recommended: GEOMETRY coordinates use longitude, latitude.
    SELECT st_geohash('POINT(121.4737 31.2304)'::GEOMETRY, 6);
    -- wtw3sj

  extended_description: |
    Pintail provides dependency-free Geohash utilities for DuckDB. New support
    references PostGIS documentation and behavior, with Pintail-specific API
    choices. Encode points, lines, polygons, multi-geometries, and collections
    using a Geohash cell that covers the entire geometry. GEOMETRY input is
    recommended for new queries and uses longitude, latitude; existing numeric
    calls retain latitude, longitude order.

    Decode Geohashes to cell-center POINTs, cell-boundary POLYGONs, or bounding-box
    STRUCTs, and find the eight neighboring cells. st_box2dfromgeohash is an alias
    of st_geohash_bbox and returns the same STRUCT. Function signatures,
    descriptions, and examples are available through duckdb_functions().

    Geometry functions use DuckDB Core GEOMETRY without requiring Spatial, GEOS,
    PROJ, or PostGIS. Decoded geometries carry EPSG:4326 coordinates.

extension_star_count: 3
extension_star_count_pretty: 3
extension_download_count: 853
extension_download_count_pretty: 853
image: '/images/community_extensions/social_preview/preview_community_extension_pintail.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>

|    function_name     | function_type |                                  description                                   | comment |                 examples                 |
|----------------------|---------------|--------------------------------------------------------------------------------|---------|------------------------------------------|
| pintail              | scalar        | Internal load-path smoke function; returns a Pintail diagnostic string.        | NULL    | [pintail('load-smoke')]                  |
| st_box2dfromgeohash  | scalar        | Decode a Geohash prefix to a BOX2D-compatible latitude/longitude bounding box. | NULL    | [st_box2dfromgeohash('ezs42-extra', 5)]  |
| st_box2dfromgeohash  | scalar        | Decode a Geohash to a BOX2D-compatible latitude/longitude bounding box.        | NULL    | [st_box2dfromgeohash('ezs42')]           |
| st_geohash           | scalar        | Encode latitude and longitude as a standard Geohash Base32 string.             | NULL    | [st_geohash(31.2304, 121.4737, 6)]       |
| st_geohash           | scalar        | Encode latitude and longitude using the default Geohash precision.             | NULL    | [st_geohash(31.2304, 121.4737)]          |
| st_geohash           | scalar        | NULL                                                                           | NULL    |                                          |
| st_geohash_bbox      | scalar        | Decode a Geohash prefix to its latitude/longitude bounding box.                | NULL    | [st_geohash_bbox('ezs42-extra', 5)]      |
| st_geohash_bbox      | scalar        | Decode a Geohash to its latitude/longitude bounding box.                       | NULL    | [st_geohash_bbox('ezs42')]               |
| st_geohash_neighbors | scalar        | Return the eight adjacent Geohash cells in [N, NE, E, SE, S, SW, W, NW] order. | NULL    | [st_geohash_neighbors('ezs42')]          |
| st_geomfromgeohash   | scalar        | Decode a Geohash prefix to the polygon boundary of its cell.                   | NULL    | [st_geomfromgeohash('c0w3h-extra', 5)]   |
| st_geomfromgeohash   | scalar        | Decode a Geohash to the polygon boundary of its cell.                          | NULL    | [st_geomfromgeohash('c0w3h')]            |
| st_pointfromgeohash  | scalar        | Decode a Geohash prefix to the center point of the selected cell.              | NULL    | [st_pointfromgeohash('wtw3sj-extra', 6)] |
| st_pointfromgeohash  | scalar        | Decode a Geohash to the center point of its cell.                              | NULL    | [st_pointfromgeohash('wtw3sj')]          |

### 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 |
|----------------|---------------------------------------------------------|------------|--------|---------|-------------|
| temp_directory | Set the directory to which temporary files are written. | VARCHAR    | GLOBAL | []      | post.db.tmp |