---
title: "ExtendIndexing"
slug: "extendindexing"
updated: 2023-11-15T12:54:23Z
published: 2023-11-15T12:54:23Z
canonical: "docs.datajet.app/extendindexing"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.datajet.app/llms.txt
> Use this file to discover all available pages before exploring further.

# ExtendIndexing

Builds accelerator files on the specified field.

| Key | Value(s) | Description |
| --- | --- | --- |
| method | "ExtendIndexing" |  |
| project | "CurrentProject" |  |
| field | "Table.FieldName" |  |
| fields[] | [ "table1.fieldname1", "table2fieldname2", "..." ] |  |
| type | "PrimaryKey" | PrimaryKey - builds accelerator files necessary for: - Fast Joins and Join Layers - FirstDiscrete on continuous variable length strings |

```json
{
    "method": "ExtendIndexing",
    "field": "Table.Field",
    "type": "PrimaryKey",
    "project": "VSJoin"
  }
```

```json
{
  "method": "ExtendIndexing",
  "project": "Demo",
  "fields": [
    "DATA.dj_Key_1,
    "DATA.dj_Key_2"
  ],
  "type": "PrimaryKey",
  "description": "build accelerator files on join keys"
}
```