---
title: "ColumnDefinition"
source: "https://github.com/remix-run/remix/blob/8905f3943706e1f53696ab83e70a84873cabfc90/packages/data-table/src/lib/driver.ts#L222"
---

# ColumnDefinition

## Summary

Normalized column definition used in schema operations.

## Signature

```ts
type ColumnDefinition = {
  autoIncrement?: boolean
  charset?: string
  checks?: ColumnCheck[]
  collate?: string
  comment?: string
  computed?: ColumnComputed
  default?: ColumnDefault
  enumValues?: string[]
  identity?: IdentityOptions
  length?: number
  nullable?: boolean
  precision?: number
  primaryKey?: boolean
  references?: ColumnReference
  scale?: number
  type: ColumnTypeName
  unique?: boolean | { name?: string }
  unsigned?: boolean
  withTimezone?: boolean
}

```