## What does Atlan crawl from Teradata?

URL: https://docs.atlan.com/apps/connectors/database/teradata/references/what-does-atlan-crawl-from-teradata

> During a Teradata crawl, Atlan extracts metadata for Schemas, Tables, Views, and Columns. Reference tables map each Teradata property to its Atlan asset.

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

## Schemas

Atlan maps [schemas](https://docs.teradata.com/r/Teradata-Warehouse-Miner-User-Guide-Volume-1Introduction-and-Profiling/July-2017/Using-Teradata-Warehouse-Miner/Main-Menu/Tools-Menu/Connection-Properties/Databases/Schemas) from Teradata to its `Schema` asset type.

| Source property | Atlan property |
| --- | --- |
| dbc.databases.DatabaseName | name |
| TABLE\_COUNT | tableCount |
| VIEW\_COUNT | viewsCount |
| dbc.databases.CreatorName | sourceCreatedBy |
| dbc.databases.CreateTimeStamp | sourceCreatedAt |
| dbc.databases.LastAlterName | sourceUpdatedBy |
| dbc.databases.LastAlterTimeStamp | sourceUpdatedAt |
| dbc.databases.CommentString | description |

## Tables

Atlan maps tables from Teradata to its `Table` asset type.

| Source property | Atlan property |
| --- | --- |
| dbc.Tables.TableName | name |
| dbc.TablesV.CommentString | description |
| COLUMN\_COUNT | columnCount |
| ROW\_COUNT | rowCount |
| CurrentPerm | sizeBytes |
| dbc.TablesV.CreatorName | sourceCreatedBy |
| dbc.TablesV.CreateTimeStamp | sourceCreatedAt |
| dbc.TablesV.LastAlterName | sourceUpdatedBy |
| dbc.TablesV.LastAlterTimeStamp | sourceUpdatedAt |
| dbc.Tables.DataBaseName | schema name |

## Views

Atlan maps views from Teradata to its `View` asset type.

| Source property | Atlan property |
| --- | --- |
| dbc.Tables.TableName | name |
| dbc.TablesV.CommentString | description |
| COLUMN\_COUNT | columnCount |
| ROW\_COUNT | rowCount |
| CurrentPerm | sizeBytes |
| dbc.TablesV.CreatorName | sourceCreatedBy |
| dbc.TablesV.CreateTimeStamp | sourceCreatedAt |
| dbc.TablesV.LastAlterName | sourceUpdatedBy |
| dbc.TablesV.LastAlterTimeStamp | sourceUpdatedAt |
| dbc.Tables.DataBaseName | schema name |

## Columns

Atlan maps columns from Teradata to its `Column` asset type.

| Source property | Atlan property |
| --- | --- |
| dbc.ColumnsV.ColumnName | name |
| REMARKS | description |
| ORDINAL\_POSITION | order |
| dbc.ColumnsV.ColumnType | dataType |
| dbc.ColumnsV.Nullable | isNullable |
| dbc.IndicesV.TableName | isPrimary |
| dbc.IndicesV.ChildDB | isForeign |
| dbc.IndicesV.DecimalTotalDigits | precision |
| dbc.IndicesV.DecimalFractionalDigits | numericScale |
| dbc.ColumnsV.DataBaseName | schema name |

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