---
warning: DO NOT CHANGE THIS MANUALLY, THIS IS GENERATED BY https://github.com/duckdb/community-extensions repository, check README there
title: level_pivot
excerpt: |
  DuckDB Community Extensions
  Storage extension wrapping LevelDB with pivot semantics for structured relational tables over key-value pairs

extension:
  name: level_pivot
  description: Storage extension wrapping LevelDB with pivot semantics for structured relational tables over key-value pairs
  version: 1.0.0
  language: C++
  build: cmake
  license: GPL-3.0
  excluded_platforms: "wasm_mvp;wasm_eh;wasm_threads"
  maintainers:
    - halgari

repo:
  github: halgari/duckdb-level-pivot
  ref: 005c79629fbb9b6959c183249d3f722b9d300c2f

docs:
  hello_world: |
    -- Attach a LevelDB database
    ATTACH '/tmp/mydb' AS kv (TYPE level_pivot, CREATE_IF_MISSING true);

    -- Create a pivot table: rows decompose into LevelDB key-value pairs
    -- Key pattern: users##<group>##<id>##<attribute_name> → attribute_value
    CALL level_pivot_create_table('kv', 'users', 'users##{group}##{id}##{attr}', ['group', 'id', 'name', 'email']);

    -- Insert data
    INSERT INTO kv.users VALUES ('admins', 'u1', 'Alice', 'alice@example.com');
    INSERT INTO kv.users VALUES ('admins', 'u2', 'Bob', 'bob@example.com');

    -- Query with standard SQL (filter pushdown on identity columns)
    SELECT * FROM kv.users;
    SELECT * FROM kv.users WHERE "group" = 'admins' AND id = 'u1';

  extended_description: |
    LevelPivot is a DuckDB storage extension that wraps LevelDB with pivot
    semantics. It maps relational rows to LevelDB key-value pairs using
    configurable key patterns, enabling structured multi-column SQL tables
    on top of a key-value store.

    Tables are created via level_pivot_create_table() with a key pattern
    like 'users##{group}##{id}##{attr}' that defines how rows decompose
    into LevelDB entries. Identity columns ({group}, {id}) form the key
    prefix; attribute columns (name, email) each become a separate
    LevelDB key-value pair.

    Key Features:
    - Pivot mode: decomposes rows into per-attribute LevelDB entries
    - Raw mode: simple 2-column key-value access
    - Configurable key patterns with identity columns and delimiters
    - Typed columns: VARCHAR, BIGINT, INTEGER, DOUBLE, BOOLEAN
    - Filter pushdown on identity columns for efficient prefix scans
    - Full DML support: INSERT, INSERT INTO...SELECT, UPDATE, DELETE
    - SIMD-optimized key parsing (AVX2, SSE2, NEON)
    - Data persistence across DETACH/ATTACH cycles

extension_star_count: 0
extension_star_count_pretty: 0
extension_download_count: 888
extension_download_count_pretty: 888
image: '/images/community_extensions/social_preview/preview_community_extension_level_pivot.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 |
|--------------------------|---------------|-------------|---------|----------|
| level_pivot_create_table | table         | NULL        | NULL    |          |
| level_pivot_dirty_tables | table         | NULL        | NULL    |          |
| level_pivot_drop_table   | table         | NULL        | NULL    |          |

### 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>

This extension does not add any settings.