docs/querying/datasourcemetadataquery.md

---
id: datasourcemetadataquery
title: "DatasourceMetadata queries"
sidebar_label: "DatasourceMetadata"
---

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:::info
 Apache Druid supports two query languages: [Druid SQL](sql.md) and [native queries](querying.md).
 This document describes a query
 type that is only available in the native language.
:::

Data Source Metadata queries return metadata information for a dataSource.  These queries return information about:

* `maxIngestedEventTime`: The timestamp of the latest ingested event for the dataSource. For realtime datasources, this may be later than `MAX(__time)` if `queryGranularity` is being used. For non-realtime datasources, this is equivalent to `MAX(__time)`.

The grammar for these queries is:

```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 Apache Druid looks at to figure out how to interpret the query|yes|
|dataSource|A String or Object defining the data source to query, very similar to a table in a relational database. See [DataSource](../querying/datasource.md) for more information.|yes|
|context|See [Query context reference](../querying/query-context-reference.md)|no|

The format of the result is:

```json
[ {
  "timestamp" : "2013-05-09T18:24:00.000Z",
  "result" : {
    "maxIngestedEventTime" : "2013-05-09T18:24:09.007Z"
  }
} ]
```