mirror of https://github.com/apache/druid.git
37 lines
1.3 KiB
Markdown
37 lines
1.3 KiB
Markdown
---
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layout: doc_page
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---
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# Time Boundary Queries
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Time boundary queries return the earliest and latest data points of a data set. The grammar is:
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```json
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{
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"queryType" : "timeBoundary",
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"dataSource": "sample_datasource",
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"bound" : < "maxTime" | "minTime" > # optional, defaults to returning both timestamps if not set
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"filter" : { "type": "and", "fields": [<filter>, <filter>, ...] } # optional
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}
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```
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There are 3 main parts to a time boundary query:
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|property|description|required?|
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|--------|-----------|---------|
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|queryType|This String should always be "timeBoundary"; this is the first thing Druid looks at to figure out how to interpret the query|yes|
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|dataSource|A String or Object defining the data source to query, very similar to a table in a relational database. See [DataSource](../querying/datasource.html) for more information.|yes|
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|bound | Optional, set to `maxTime` or `minTime` to return only the latest or earliest timestamp. Default to returning both if not set| no |
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|filter|See [Filters](../querying/filters.html)|no|
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|context|See [Context](../querying/query-context.html)|no|
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The format of the result is:
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```json
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[ {
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"timestamp" : "2013-05-09T18:24:00.000Z",
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"result" : {
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"minTime" : "2013-05-09T18:24:00.000Z",
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"maxTime" : "2013-05-09T18:37:00.000Z"
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}
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} ]
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```
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