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layout: doc_page
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# Data Source Metadata Queries
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Data Source Metadata queries return metadata information for a dataSource. It returns the timestamp of latest ingested event for the datasource. The grammar is:
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```json
{
"queryType" : "dataSourceMetadata",
"dataSource": "sample_datasource",
}
```
There are 2 main parts to a Data Source Metadata query:
|property|description|required?|
|--------|-----------|---------|
|queryType|This String should always be "dataSourceMetadata"; this is the first thing Druid looks at to figure out how to interpret the query|yes|
|dataSource|A String defining the data source to query, very similar to a table in a relational database|yes|
|context|An additional JSON Object which can be used to specify certain flags.|no|
The format of the result is:
```json
[ {
"timestamp" : "2013-05-09T18:24:00.000Z",
"result" : {
"maxIngestedEventTime" : "2013-05-09T18:24:09.007Z",
}
} ]
```
