---
warning: DO NOT CHANGE THIS MANUALLY, THIS IS GENERATED BY https://github.com/duckdb/community-extensions repository, check README there
title: improv
excerpt: |
  DuckDB Community Extensions
  Improv's spreadsheet formula language (681 functions) and multidimensional models (categories, measures, formulas over them) on DuckDB tables

extension:
  name: improv
  description: Improv's spreadsheet formula language (681 functions) and multidimensional models (categories, measures, formulas over them) on DuckDB tables
  version: 0.13.0
  language: Rust
  build: cargo
  license: MIT OR Apache-2.0
  maintainers:
    - gburd
  requires_toolchains: "rust;python3"
  # Not yet built or tested for musl, mingw or wasm (the engine's timely /
  # differential-dataflow stack has not been tried there).
  excluded_platforms: "wasm_mvp;wasm_eh;wasm_threads;windows_amd64_mingw;linux_amd64_musl"
repo:
  # Their CI clones from GitHub, so this is the mirror, not Codeberg.
  github: gburd/improv
  # A commit SHA, filled in once that commit is qualified on every platform
  # (.github/workflows/duckdb.yml).
  ref: 6aa70f7f388126e42cb82b8fcd93ce65da870904
docs:
  hello_world: |
    LOAD improv;
    -- Any of Improv's 681 built-in functions, on named inputs.
    SELECT improv_calc('ROUND(PMT(rate/12, n, -pv), 2)',
                       json_object('rate', 0.06, 'n', 360, 'pv', 200000));  -- 1199.1
    SELECT improv_calc_text('1/0');                                          -- #DIV/0!
    SELECT name, signature FROM improv_functions(query := 'pmt');
    -- A multidimensional model over a table: one row per computed cell.
    CREATE TABLE sales AS SELECT * FROM (VALUES
      (2024, 'WidgetA', 10, 100), (2024, 'WidgetB', 20, 50),
      (2025, 'WidgetA', 11, 120), (2025, 'WidgetB', 20, 40)) t(year, product, price, qty);
    SELECT * FROM improv('sales', '
      category Time = year
      category Product = product
      input Price = price
      input Quantity = qty sum
      Revenue = Price * Quantity
      Share = Revenue / SUM(Revenue OVER Product)
      Growth = Revenue - PREV(Revenue, Time, 1, 0)');
  extended_description: |
    Improv is a multidimensional spreadsheet in the Lotus Improv / Quantrix
    tradition: data lives in categories (Time, Product, Region) instead of
    cell addresses, and formulas name measures (`Revenue = Price *
    Quantity`), so one formula covers every cell it applies to.

    This extension brings its formula engine to DuckDB:

    - `improv_calc(formula [, inputs])` evaluates a scalar Improv formula
      (math, statistics, financial, text, dates, engineering, `IF`, `LET`,
      `LAMBDA`; aggregations over categories need a model) on named inputs
      passed as a JSON object. An error value is NULL; `improv_calc_text`
      returns any type and renders errors (`#DIV/0!`).
    - `improv_functions([query := ...])` lists the functions with their
      signatures and descriptions.
    - `improv(source, model)` reads a table or a SELECT, builds a model from
      a short spec (categories from columns, inputs from columns with an
      optional sum/avg/min/max/count, derived measures as formulas, with
      aggregations across categories and PREV/NEXT along them) and returns
      one row per computed cell, ready to join.

    The same engine runs Improv's desktop GUI, terminal UI, CLI and its
    PostgreSQL extension (pg_improv). Source: https://codeberg.org/gregburd/improv

extension_star_count: 3
extension_star_count_pretty: 3
extension_download_count: 529
extension_download_count_pretty: 529
image: '/images/community_extensions/social_preview/preview_community_extension_improv.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 |
|------------------|---------------|-------------|---------|----------|
| improv           | table         | NULL        | NULL    |          |
| improv_calc      | scalar        | NULL        | NULL    |          |
| improv_calc_text | scalar        | NULL        | NULL    |          |
| improv_functions | 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>

|      name      |                       description                       | input_type | scope  | aliases | typed_value |
|----------------|---------------------------------------------------------|------------|--------|---------|-------------|
| temp_directory | Set the directory to which temporary files are written. | VARCHAR    | GLOBAL | []      | post.db.tmp |