## What does Atlan crawl from AWS Glue?

URL: https://docs.atlan.com/apps/connectors/etl-tools/aws-glue/references/what-does-atlan-crawl-from-aws-glue

> During an AWS Glue crawl, Atlan extracts metadata for Catalogs, Databases, Schemas, Tables, and Jobs. Reference tables map each Glue property to its Atlan asset.

Atlan extracts metadata for Catalogs, Databases, Schemas, Tables, and Jobs from AWS Glue and maps each property to its internal asset model. The tables below list which AWS Glue properties are read and how they appear on the corresponding Atlan asset.

## Databases

Atlan maps databases from AWS Glue to its `Database` asset type.

| Source property | Atlan property |
|---|---|
| `TABLE_CATALOG` | `name` |
| `SCHEMA_COUNT` | `schemaCount` |

## Schemas

Atlan maps schemas from AWS Glue to its `Schema` asset type.

| Source property | Atlan property |
|---|---|
| `TABLE_SCHEMA` | `name` |
| `TABLE_COUNT` | `tableCount` |
| `VIEW_COUNT` | `viewsCount` |
| `TABLE_CATALOG` | `databaseName` |
| `COMMENTS` | `description` |
| `CreateTime` | `sourceCreatedAt` |

## Tables

Atlan maps tables from AWS Glue to its `Table` asset type.

| Source property | Atlan property |
|---|---|
| `TABLE_NAME` | `name` |
| `COMMENTS` | `description` |
| `COLUMN_COUNT` | `columnCount` |
| `ROW_COUNT` | `rowCount` |
| `objectCount` | `tableObjectCount` |
| `BYTES` | `sizeBytes` |
| `Parameters (recordCount)` | `rowCount` |
| `Parameters (sizeKey)` | `sizeBytes` |
| `TABLE_TYPE` | `subType` |
| `StorageDescriptor (Location)` | `externalLocation` |
| `Parameters (typeOfData, classification)` | `externalLocationFormat` |
| `PartitionKeys` | `isPartitioned` |
| `PartitionData` | `partitionCount`, `partitionList` |
| `CreatedBy` | `sourceCreatedBy` |
| `CreateTime`, `CreationTime` | `sourceCreatedAt` |
| `UpdateTime`, `LastAccessTime` | `sourceUpdatedAt` |

## Views

Atlan maps views from AWS Glue to its `View` asset type.

| Source property | Atlan property |
|---|---|
| `TABLE_NAME` | `name` |
| `COMMENTS` | `description` |
| `COLUMN_COUNT` | `columnCount` |
| `VIEW_DEFINITION` | `definition` |
| `Parameters (recordCount)` | `rowCount` |
| `PartitionKeys` | `isPartitioned` |
| `PartitionData` | `partitionCount`, `partitionList` |
| `CreatedBy` | `sourceCreatedBy` |
| `CreateTime`, `CreationTime` | `sourceCreatedAt` |
| `UpdateTime`, `LastAccessTime` | `sourceUpdatedAt` |

## Columns

Atlan maps columns from AWS Glue to its `Column` asset type.

Atlan also supports nested columns up to level 15 for AWS Glue to help you enrich your semi-structured data types:
* Atlan retrieves raw `STRUCT` and `ARRAY` type objects for nested columns up to 15 levels.
* View nested columns in the column preview and overview sidebar for your table assets.
* Column-level lineage is supported. Search, enrich metadata, and view lineage for nested columns.
* Tag propagation is currently only supported from parent to nested columns.
* Atlan currently doesn't parse `MAP` type objects for columns and nested columns.

| Source property | Atlan property |
|---|---|
| `COLUMN_NAME` | `name` |
| `COMMENTS` | `description` |
| `ORDINAL_POSITION`, `COLUMN_ID` | `order` |
| `TYPE_NAME`, `DATA_TYPE` | `dataType` |
| `IS_PARTITION` | `isPartition` |
| `PARTITION_ORDER` | `partitionOrder` |

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